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A potential giant gallium deposit hosted in the tailing dam of the Fankou Zn-Pb deposit in northern Guangdong Province, South China
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作者 Peng-peng Yu Zhao-bin Hu +6 位作者 Yi Zheng Lan-xuan Guo Shi-yuan Ouyang Gui-qiang Yuan Shang-zhou Chen Cheng-ming Wang Xi Chen 《China Geology》 CAS CSCD 2024年第1期157-160,共4页
1.Objective The Fankou giant zinc(Zn)-lead(Pb)deposit in Guangdong Province is well-known for its huge reserves of over 10 Mt(million ton)Zn+Pb metals and high ore-grade with Zn+Pb exceeding 15%(Guangdong Fankou Depos... 1.Objective The Fankou giant zinc(Zn)-lead(Pb)deposit in Guangdong Province is well-known for its huge reserves of over 10 Mt(million ton)Zn+Pb metals and high ore-grade with Zn+Pb exceeding 15%(Guangdong Fankou Deposit Investigation Group,1980;Zhu XY et al.,2017).After 60 years of exploration and exploitation,the deposit has accumulated millions of tons of tailings.One interesting question is that what components are hosted in these tailings,and whether some key and critical metals such as gallium and germanium are extremely enriched and worth further comprehensive utilization.This motivated us to conduct an integrated set of field investigation,sampling,major-trace element analyses and reserve assessments about the Fankou tailings.In this contribution,we discover that the tailings contain a variety of metal elements such as zinc,lead and gallium with comprehensive utilization potential.These data can act as a scientific guidance for further exploration and utilization of the Fankou tailings,and aid to enhance the utilization efficiency of the key mineral resource in China.Our study also provide demonstration for future green mine construction in China. 展开更多
关键词 DEPOSIT comprehensive guangdong
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First Report LA-ICP-MS Zircon U-Pb Age of Early Jurassic Volcanic Rocks from Rencha Volcanic Basin, Northeast Guangdong Province, Southeastern China 被引量:3
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作者 YU Yushuai LOU Feng +2 位作者 DAI Pingyun GUO Fusheng YANG Qidi 《Acta Geologica Sinica(English Edition)》 CAS CSCD 2018年第5期2036-2038,共3页
Objective Most scholars agreed that the tectonic setting of South China block(SBC)changed from Tethys during the Indosinian to Pacific tectonic regime in the Yanshanian.However,the specific change time for the trans... Objective Most scholars agreed that the tectonic setting of South China block(SBC)changed from Tethys during the Indosinian to Pacific tectonic regime in the Yanshanian.However,the specific change time for the transition is still in debate and the Triassic to Jurassic magmatic activity will provide a clue to better understanding the transition. 展开更多
关键词 PB Northeast guangdong Province Southeastern china ICP MS
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Present status and conservation strategies of mangrove resource in Guangdong, P. R. China 被引量:2
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作者 韩维栋 《Journal of Forestry Research》 SCIE CAS CSCD 2003年第2期151-154,共4页
According to the survey of Guangdong mangrove resource in 2001 and authors field investigations in the past 5 years, the total mature mangrove land area of Guangdong Province was estimated at 9084 hm2, accounting for ... According to the survey of Guangdong mangrove resource in 2001 and authors field investigations in the past 5 years, the total mature mangrove land area of Guangdong Province was estimated at 9084 hm2, accounting for 41.4% of total mangrove land area of China. These mangrove forests totally consisted of 50 species belonging to 28 families, distributed at more than 100 locations along the coastlines of Guangdong and most of them present a high dense and dwarf appearance. The Ass. Avicennia marina is the most dominant mangrove association. The investigation results showed that the mangrove forests with coverage rates above 0.7 accounted for 68.0% of the total mangrove land area of the province and 77.8% of mangrove forests was less than 2 m in tree height. Since 1950, 54.6% of mangrove forests have disappeared due to paddy rice reclaim, aquaculture and city constructions. Derivational conservation efforts are still weakly empowered and should be strengthened intensively. The author suggested that mangrove laws and regulations should be enforced, mangrove scientific research should be strengthened; and mangrove conservation awareness of local community should be raised on conservation of mangroves. 展开更多
关键词 guangdong MANGROVE Present status of resource Conservation.
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Ecological Network Analysis Quantifying the Sustainability of Regional Economies: A Case Study of Guangdong Province in China 被引量:2
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作者 LIANG Jinshe HU Ke DAI Teqi 《Chinese Geographical Science》 SCIE CSCD 2018年第1期127-136,共10页
To meet the challenge of sustainable development, sustainability must be made. Ecological network analysis(ENA) was introduced in this paper as an approach to quantitatively measure the growth, development, and sustai... To meet the challenge of sustainable development, sustainability must be made. Ecological network analysis(ENA) was introduced in this paper as an approach to quantitatively measure the growth, development, and sustainability of an economic system. The Guangdong economic networks from 1987 to 2010 were analyzed by applying the ENA approach. Firstly, a currency flow network among economic sectors was constructed to represent the Guangdong economic system by adapting the input-output(I-O) table data. Then, the network indicators from the ENA framework involving the total system throughput(TST), average mutual information(AMI), ascendency(A), redundancy(R) and development capacity(C) were calculated. Lastly, the network indicators were analyzed to acquire the overall features of Guangdong's economic operations during 1987–2010. The results are as follows: the trends of the network indicators show that the size of the Guangdong economic network grows exponentially at a high rate during 1987–2010, whereas its efficiency does not present a clear trend over its whole period. The growth is the main characteristic of the Guangdong economy during 1987–2010, with no clear evidence regarding its development. The quantitative results of the network also confirmed that the growth contributed to a great majority of the Guangdong economy during 1987–2010, whereas the development's contribution was tiny during the same period. The average value of the sustainability indicator(α) of the Guangdong economic network was 0.222 during 1987–2010, which is less than the theoretically optimal value of 0.37 for a sustainable human-influenced system. The results suggest that the Guangdong economic system needs a further autocatalysis to improve its efficiency to support the system maintaining a sustainable evolvement. 展开更多
关键词 network analysis regional economy sustainability evaluation ASCENDENCY guangdong Province of china
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High Prevalence of Eimeria Infection in Domestic Pigeons(Columba Livia Domestica) in Guangdong Province, Southern China 被引量:1
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作者 Juan LI Xuhui LIN +4 位作者 Caiyan WU Shenquan LIAO Nanshan QI Minna LV Mingfei SUN 《Agricultural Science & Technology》 CAS 2016年第1期115-116,共2页
[Objective] This study aimed to make a survey of domestic pigeons for infection with Eimeria species of coccidia was conducted in Guangdong Province, southern China. [Method] A total of 244 fecal samples(102 from Huiz... [Objective] This study aimed to make a survey of domestic pigeons for infection with Eimeria species of coccidia was conducted in Guangdong Province, southern China. [Method] A total of 244 fecal samples(102 from Huizhou, 83 from Jiangmen, 35 from Chaozhou and 24 from Guangzhou, respectively) in four pigeon breeding farms between June 2012 and March2013 were collected and examined microscopically. [Results] Eimeria oocysts were seen in 223(91.4%) fecal samples, with three species, namely E. labbeana, E.columbae and E. kapotei. E. labbeana was the most common species in Guangdong provinces with an overall prevalence of 91.4%, while a slightly lower incidence of E. columbae and E. kapotei species was detected with11.1% and 6.6%, representatively. The prevalence in different months varied ranging from 83.3% to 91.7%, with the highest prevalence in summer. Nestling groups showed obviously high infection than adult pigeons. [Conclusion] The present survey indicated the wide and severe prevalence of Eimeria infection in Guangdong domestic pigeons, which suggested that integrated measures should be taken to control and prevent coccidiosis of pigeons in this province. 展开更多
关键词 EIMERIA PIGEONS guangdong Province Southern china
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COMPARISON STUDY ON THE INTRASEASONAL VARIATIONS IN CIRCULATIONS AND PRECIPITATION MODULATED BY THE TROPICAL CYCLOGENESIS OVER SOUTH CHINA SEA-WESTERN PACIFIC DURING GUANGDONG FLOODING PERIOD
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作者 李春晖 万齐林 +2 位作者 郑彬 谷德军 林爱兰 《Journal of Tropical Meteorology》 SCIE 2011年第4期363-374,共12页
Based on tropical cyclone datasets from Shanghai Typhoon Institute of China Meteorological Administration,the National Centers for Environmental Prediction (NCEP,USA) reanalysis data and the rainfall records from 743 ... Based on tropical cyclone datasets from Shanghai Typhoon Institute of China Meteorological Administration,the National Centers for Environmental Prediction (NCEP,USA) reanalysis data and the rainfall records from 743 stations in China,the impacts of cyclogenesis number over the South China Sea and the western Pacific are studied on the 30-60-day oscillations in the precipitation of Guangdong during the flooding period.The year with more-than-normal (less-than-normal) tropical cyclogenesis is defined as a 'high year' ('low year').In light of the irregular periodic oscillations,the method used to construct the composite life cycle is based on nine consecutive phases in each of the cycles.Phases 1,3,5,and 7 correspond to,respectively,the time when precipitation anomalies reach theminimum,a positive transition (negative-turning-to-positive) phase,the maximum,and a negative transition phase.The results showed that the precipitation of the 30-60-day oscillations is associated with the interaction between a well-organized eastward propagation system from the Arabian Sea/Bay of Bengal and a westward-propagating system (with cyclonic and anticyclonic anomalies in the northwest-southeast direction) from the South China Sea to western Pacific during the high years,whereas the precipitation is affected during a low year by the circulation over the South China Sea and western Pacific (with cyclonic and anticyclonic anomalies in the northeast-southwest direction).During the high year,the warm and wet air mass from the ocean to the west and south are transported to Guangdong by westerly anomalies and an enclosed latitudinal cell,which ascends in the Northern Hemisphere low latitudes and descends in the Southern Hemisphere low latitudes.During the low year,the warm and wet air mass from the ocean to the south is transported to Guangdong by southwesterly wind anomalies and local ascending movements.Because the kinetic energy,westerly,easterly shift,vertical velocity and vapor transportation averaged over (109-119° E,10-20° N) is stronger in high years than those in low years,the precipitation of the 30-60-day oscillations in Guangdong is higher in high years than that in low years. 展开更多
关键词 cyclogenesis number over the South china Sea and western Pacific precipitation in guangdong province 30-60-day oscillation
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Guangdong Became First Province in China With Total Economic Value Over RMB 1 Trillion
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《China's Foreign Trade》 2002年第2期54-54,共1页
关键词 OVER GDP guangdong Became First Province in china With Total Economic Value Over RMB 1 Trillion
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Guangdong:The Ever Open Southern Gate to China
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《China Today》 2001年第8期6-25,共20页
关键词 guangdong:The Ever Open Southern Gate to china
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Spatio-temporal variations of harmful algal blooms along the coast of Guangdong,Southern China during 1980–2016 被引量:4
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作者 LI Li Lü Songhui CEN Jingyi 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2019年第2期535-551,共17页
Harmful algal blooms (HABs) have become a recurring problem, posing severe impacts on marine ecosystems, fisheries, mariculture industry, and even public health. In this study, the geographic information system (GIS) ... Harmful algal blooms (HABs) have become a recurring problem, posing severe impacts on marine ecosystems, fisheries, mariculture industry, and even public health. In this study, the geographic information system (GIS) was utilized to determine spatial and temporal characteristics of HAB events in the coastal waters of Guangdong from 1980–2016. We analyzed distribution patterns and characteristics of HABs by dividing the coast of Guangdong into well-known bays, estuary and coastal waters. Results showed that there were a total of 337 HABs recorded in Guangdong coastal waters. Spatial and temporal distributions varied among diff erent regions. Most HABs occurred in the Mirs Bay, followed by the west coast of Daya Bay, while a few occurred in the west and east coasts of Guangdong but with an increasing trend in the past two decades. HABs occurred mostly in warmer months of March to May in the western coast of Guangdong, March and April in Mirs Bay, April in Zhujiang (Pearl) River estuary, November in eastern coast of Guangdong. For Daya Bay, most HABs were reported between March and September. The most frequently occurring HABs species were Noctiluca scintillans , Phaeocystis globosa , Skeletonema costatum and Scrippsiella trochoidea , occurring mostly in Mirs Bay, western Guangdong coast area, eastern Guangdong coast area and Zhujiang River estuary and Daya Bay, respectively. Ichthyotoxic blooms were more common than toxic blooms, and Heterosigma akashiwo , Chattonella marina , Karenia mikimotoi and P haeocystis globosa were the most common ichthyotoxic species. Our results provide baseline information useful for policy making and management of HABs in the region. 展开更多
关键词 harmful ALGAL BLOOMS guangdong Province distribution GEOGRAPHIC information system (GIS) KERNEL density estimation
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Remote Sensing Assessment of Ecological Effects of Marine Ranching in the Eastern Guangdong Waters, China 被引量:1
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作者 Yanfeng Wang Jing Yu Pimao Chen 《Journal of Geoscience and Environment Protection》 2018年第12期101-113,共13页
This study aims to assess ecological effects of the construction of marine ranching in the eastern Guangdong waters. Variations in sea surface temperature (SST), chlorophyll a concentration (Chl-a), catch per unit eff... This study aims to assess ecological effects of the construction of marine ranching in the eastern Guangdong waters. Variations in sea surface temperature (SST), chlorophyll a concentration (Chl-a), catch per unit effort (CPUE), biodiversity, biomass and density of benthos were compared during the pre- (August in 2011) and post- (August in 2013) marine ranching. These were based on satellite remote sensing and survey data. Results showed that the ratio of Nitrogen (N): Phosphorus (P) was closed to 16, Chl-a increased from 7.5 - 12.3 mg·m-3 to 10.4 - 16.2 mg·m-3, and CPUE increased from 2.1 - 5.5 kg·h-1 to 5.8 - 14.5 kg·h-1. The species number of fish, crustaceans, cephalopods and shellfish increased by 25, 3, 2 and 3 respectively. Shannon-Wiener biodiversity index of fish, crustaceans, cephalopods and shellfish increased by 0.5, 0.4, 0.1 and 1.0 respectively. Both biomass and density of benthos increased also. The construction of marine ranching in the eastern Guangdong had restored the habitat to some extent, and played positive effects in the conservation and proliferation of fishery resources in local area. 展开更多
关键词 Marine RANCHING ECOLOGICAL Effects Remote Sensing EASTERN guangdong WATERS china
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Study on ecology of foulers on buoys in Dianbai, Guangdong, China 被引量:2
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作者 Lin Sheng, Huang Zongguo, Li Chuanyan, Zheng Chengxing and Wang JianjunThird Institute of Oceanography, Slate Oceanic Adrninistration, Xiamen, China 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1990年第4期618-621,共4页
From May to July, 1985, foulers on eleven navigation buoys have been surveyed in Shuidongand Bohe Harbours of Dianbai, Guangdong. Foulers on different parts of buoys (side, bottom and in-side tail tube) were sampled. ... From May to July, 1985, foulers on eleven navigation buoys have been surveyed in Shuidongand Bohe Harbours of Dianbai, Guangdong. Foulers on different parts of buoys (side, bottom and in-side tail tube) were sampled. The thickness and cover area of foulers were measured in the field andall the foulers on an area of 30×30 cm~2 were taken back for lab. identification. Thirty-four quatita-tive samples and several qualitative samples have been got and five hundred and twenty-four sampleshave been classified. 展开更多
关键词 guangdong Study on ecology of foulers on buoys in Dianbai china
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Forms and Balance of Nitrogen and Phosphorus in Cage Culture Waters in Guangdong Province, China 被引量:9
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作者 WEN Yanmao WEI Xiange +4 位作者 SHU Tingfei ZHOU Jingfeng YU Guanghui LI Feng HUANG Yanyun 《Chinese Geographical Science》 SCIE CSCD 2007年第4期370-375,共6页
In order to approach the characteristics of nitrogen and phosphorus pollution caused by cage culture and the balance of nitrogen and phosphorus during the process of cage culture, a monitoring was conducted in Daya Ba... In order to approach the characteristics of nitrogen and phosphorus pollution caused by cage culture and the balance of nitrogen and phosphorus during the process of cage culture, a monitoring was conducted in Daya Bay of Guangdong Province, China from April 2002 to Jane 2003. The results show that the concentrations of total nitrogen (TN) in the waters at the sites with five and ten years of cage culture history are 1.8 and 2.3 times of that at control site respectively. Ammonium (NH3-N) is the main form of nitrogen in spring while nitrate (NO~) in winter. The concentrations of TN, total dissolved nitrogen (TDN) and dissolved organic nitrogen (DON) are highest in autumn. The concentration of phosphorus increases with the increasing of the culturing time, among which phosphate ( PO^-34) increases most obviously. The concentrations of total phosphorus (TP) and total dissolved phosphorus (TDP) are highest in autumn. The nitrogen and phosphorus are accumulated significantly in the sediment of cage culture area. The model of N balance in the cage culture area: bait (70.62%) + fry (0.28%) + input by tide (14.8%) + release from sediment 04.3%) = harvest of adult fish (12.07%) + deposition into sediment (28.75%) + output by tide (56.18%) + others (3.00%). The model of P balance: bait (83.11%) + fry (0.17%) + input by tide (12.23%) + release from sediment (4.49%) = harvest of adult fish (8.43%) + deposition into sediment (48.59%) + output by tide (41.94%) + others (1.04%). In one fish growth year, the contents of nitrogen and phosphorus in harvest of adult fish are only 17.0% and 10.1% of the contents of nitrogen and phosphorus in fish bait and fry, wherein 83% of nitrogen and more than 89% of phosphorus in fish bait became marine pollutants. 展开更多
关键词 cage culture environment impact NITROGEN PHOSPHORUS Daya Bay guangdong Province
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Effectiveness of Using Mean Corpuscular Volume and Mean Corpuscular Hemoglobin for Beta-thalassemia Carrier Screening in the Guangdong Population of China 被引量:4
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作者 GU Heng WANG Yong Xia +3 位作者 DU Meng Xuan XU Shan Shan ZHOU Bing Yi LI Ming Zhen 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2021年第8期667-671,共5页
Beta(β)-thalassemia is one of the most common hemoglobinopathies worldwide,creating major public health problems and social burdens in many regions.Screening forβ-thalassemia carriers is crucial for controlling this... Beta(β)-thalassemia is one of the most common hemoglobinopathies worldwide,creating major public health problems and social burdens in many regions.Screening forβ-thalassemia carriers is crucial for controlling this condition.To investigate the?effectiveness?of?mean?corpuscular?volume?(MCV)and mean corpuscular hemoglobin(MCH)for screeningβ-thalassemia,retrospective data were analyzed for 6,779β-thalassemia carriers subjected to genetic testing following thalassemia screening in Guangdong province between January 2018 and December 2019. 展开更多
关键词 guangdong POPULATION THALASSEMIA
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A Preliminary Study on the Red Beds in the Northern Heyuan Basin, Guangdong Province, China 被引量:1
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作者 ZHANG Xianqiu LU Junchang +3 位作者 BIAN Geguo QIU Licheng HUANG Dong YUAN Weiqiang 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2005年第5期598-604,共7页
The red beds of the northern Heyuan Basin (Guangdong Province, China) are more than 4,000 m thick. Based on the lithological characters, in ascending order these beds are divided into the Dafeng Formation, Zhutian F... The red beds of the northern Heyuan Basin (Guangdong Province, China) are more than 4,000 m thick. Based on the lithological characters, in ascending order these beds are divided into the Dafeng Formation, Zhutian Formation, and Zhenshui Formation of the Nanxiong Group, Shanghu Formation and Danxia Formation. The Nanxiong Group with relatively mature coarse clastic rocks attains about 2940 m in thickness. The Dafeng Formation is 837 m thick, consisting of conglomerates and sandy conglomerates; the Zhutian Formation, which is 1.200 m thick, consists of purplish red sandstone with gravels, poorly sorted sandstone, feldspathic quartzose sandstone banded granular conglomerate, siltstone, and sandy mudstone. The Zhutian Formation is rich in calcareous concretions. Heyuannia (Oviraptoridae) and turtle fossils were found in this formation. The Zhenshui Formation deposited to a thickness of 900 m consists of coarse sediments, including granular conglomerate, and gravelly sandstone with well developed cross-beddings; the Shanghu Formation, which is 820 m thick, consists of purplish red granular conglomerate coarse sandstone intercalated with fine si^tstone; the Danxia Formation characterized by the Danxia ~andform is composed of coarse c^astic gravels and sandy gravels. The lower part of the Nanxiong Group whence dinosaur eggs and derived oviraptorosaurs come, belongs to the Late Cretaceous. No fossils are found in the Shanghu Formation or the Danxia Formation, but their stratigraphic order of superposition on the Nanxiong Group clearly shows their younger age. 展开更多
关键词 Heyuan Basin red beds dinosaur eggs Heyuannia (Oviraptoridae) CRETACEOUS guangdong
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A New Newt of the Genus Cynops(Caudata: Salamandridae) from Guangdong, China 被引量:1
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作者 Zhiyong YUAN Ke JIANG +2 位作者 Limin DING Liang ZHANG Jing CHE 《Asian Herpetological Research》 SCIE 2013年第2期116-123,共8页
We describe a new species of the genus Cynops from northeastern Guangdong, China. This new species is distinguished from its congeners by a combination of morphological and molecular characters. In morphology, it is c... We describe a new species of the genus Cynops from northeastern Guangdong, China. This new species is distinguished from its congeners by a combination of morphological and molecular characters. In morphology, it is chra- cterized by distinctive irregular bluish grey spots on the dorsum from head to tail; irregular, bright orange blotches on venter, chin, underside of axillae, limbs, cloaca; one bright orange stripe in the middle of venter; and ventral tail orange red. Analyses of mitochondrial DNA data indicate that this new species forms one highly diverged lineage within the Chinese group of Cynops. 展开更多
关键词 CAUDATA SALAMANDRIDAE Cynops glaucus sp. nov. NEWT guangdong molecular analysis
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Morphological study of the genus Herposiphonia (Rhodophyta, Rhodomelaceae) on the coast of eastern Guangdong, China, with a description of H. pinnata sp. nov. 被引量:2
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作者 丁兰平 谭华强 +2 位作者 张全亮 曾令昭 黄冰心 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2016年第2期271-282,共12页
We present a taxonomic study of taxa of the red algae genus Herposiphonia (Rhodophyta, Rhodomelaceae), collected from the coast of eastern Guangdong, China. We made detailed morphological studies and considered rece... We present a taxonomic study of taxa of the red algae genus Herposiphonia (Rhodophyta, Rhodomelaceae), collected from the coast of eastern Guangdong, China. We made detailed morphological studies and considered recent taxonomic criteria for species delimitation, and are making the first report of five different species on the coast of Guangdong, including a new species. The species identified were H. caespitosa Tseng, H. hollenbergii Dawson, H. pecten-veneris (Harvey) Falkenberg, H. subdisticha Okamura and H. pinnata Ding and Tan sp. nov. H. pinnata sp. nov. is characterized by bright green thaUi; most parts of the feathery thalli are free of the substratum; determinate branches and indeterminate branches are arranged in a chaotic sequence; the primary axis has bare segments; the determinate branch has 9-11 periaxial cells per segment; vegetative trichoblasts are abundant; and tetrasporangia are formed on the middle of the determinate branch with 1-8 successive segments in a single rectilinear series. This paper is also the first record of sporophyte plants ofH. pecten-veneris. 展开更多
关键词 new species morphological taxonomy guangdong Province biogeography distribution
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Silicate Adsorption in Paddy Soils of Guangdong Province, China 被引量:1
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作者 HUANG Li-Yuan LI Hua-Xing ZHANG Xin-Ming LU Wei-Sheng LIU Yuan-Jin 《Pedosphere》 SCIE CAS CSCD 2006年第5期654-659,共6页
Silicate adsorption in eight paddy soils developed from four different parent materials in Guangdong Province, China was examined to obtain fundamental knowledge of silicate adsorption to improve the efficacy of silic... Silicate adsorption in eight paddy soils developed from four different parent materials in Guangdong Province, China was examined to obtain fundamental knowledge of silicate adsorption to improve the efficacy of silicate fertilizer use in these areas. A correlation analysis showed that silicate adsorption did not obey the Langmuir equation (r = -0.664-0.301) but did obey the Freundlich and Temkin equations (P < 0.01, r = 0.885-0.990). When the equilibrium silicate concentration (Ci) was less than 45 mg SiO2 kg-1, the adsorption capacity was in the following decreasing order of paddy soils: basalt-derived > Pearl River Delta sediment-derived > granite-derived > sand-shale-derived. Stepwise regression and path analysis showed that for the investigated paddy soils amorphous MnO and Al2O3 were the two most important materials that affected silicate adsorption. Moreover, as Ci increased, amorphous Al2O3 tended to play a more important role in silicate adsorption, while the effects of amorphous MnO on silicate adsorption tended to decrease. 展开更多
关键词 guangdong Province paddy soils parent materials silicate adsorption
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Suitability evaluation on marine ranching in Guangdong,South China 被引量:1
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作者 Anning SUO Weiguo ZHOU Dewen DING 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2023年第2期778-791,共14页
The ecological suitability of marine resources and environmental conditions for marine ranching in Guangdong,South China was evaluated.Niche theory was used to establish an ecological suitability evaluation model for ... The ecological suitability of marine resources and environmental conditions for marine ranching in Guangdong,South China was evaluated.Niche theory was used to establish an ecological suitability evaluation model for marine ranching site selection,and suitability evaluation of marine ranching was conducted in.Results show that the ecological suitability index of marine ranching site selection was greater than 64.0 in 20 sites,including offshore Shantou Bay,offshore Zhanjiang Port,and Longdou Bay etc.,which are the priority areas for marine ranching.In other 13 sites,the ecological suitability index ranged between 8.0 and 32.0,including Houjiang Bay,Haimen Bay,and Jieshi Bay etc.,indicating the suitability for marine ranching.However,the ecological suitability index was 0 in Shantou Bay,Zhujiang(Pearl)River estuary,Huangmao Sea,Guanghai Bay,Zhanjiang Port,Qiongzhou Strait,and Anpu Port.These sites are thus unsuitable for marine ranching.This study provides a theoretical basis for site selection and planning of marine ranching in Guangdong Province. 展开更多
关键词 marine ranching site suitability EVALUATION ecological niche guangdong Province
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Petrogenesis of the Early Cretaceous Tiantangshan A-type Granite in northwestern Guangdong province, SE China and tectonic implications 被引量:2
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作者 JIA Ruya WANG Guochang +2 位作者 GENG Lin ZHANG Zhihui JIA Hongxiang 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第S1期64-65,共2页
1 Introduction During the late Mesozoic times,the SE China is characterized by extensive magmatism and mineralization.The widely distributed granitoids with different(I-,S-and A-)types have been inferred to be closely... 1 Introduction During the late Mesozoic times,the SE China is characterized by extensive magmatism and mineralization.The widely distributed granitoids with different(I-,S-and A-)types have been inferred to be closely related to the large-scale polymetallic mineralization.The Nanling tungsten-tin polymetallic belt is endowed with considerable 展开更多
关键词 HIGH TYPE Petrogenesis of the Early Cretaceous Tiantangshan A-type Granite in northwestern guangdong province
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AN INVESTIGATION OF CHANGES IN CULTIVATED LAND IN GUANGDONG PROVINCE OF CHINA USING GIS
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作者 张新长 《Chinese Geographical Science》 SCIE CSCD 1999年第3期73-81,共9页
In order to make a thorough investigation about relationship between population increase and cultivated land decrease along with economic development over recent years in Guangdong province, this paper aims to study t... In order to make a thorough investigation about relationship between population increase and cultivated land decrease along with economic development over recent years in Guangdong province, this paper aims to study the relationship between the changes in cultivated land and the rapid economic development in Guangdong Province of China using GIS. The spatial database of administrative boundary in the province is captured and stored in GIS and then several county based statistics produced by the National Statistical Bureau of China are linked to the spatial data. In the study, the correlation analysis between decrease of cultivated land in some metropolitan counties and population increase is conducted. Besides, similar analysis is carried out between decrease of cultivated land in the Zhujiang (Pearl) River Delta Region and gross industrial output. The result of the analysis is presented in GIS with the boundary data to show the spatial distribution and trend of the phenomenon. Some measures of conserving cultivated land in the province in order to achieve a sustainable development are also proposed. 展开更多
关键词 GIS sustainable development INVESTIGATION of CULTIVATED LAND guangdong PROVINCE
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