Objective The Lincang granitic batholith, extending over 370 km from north to south with an area of more than 10000 km2, is the major part of the Sanjiang region in western Yunnan, SW China, and is one key area to st...Objective The Lincang granitic batholith, extending over 370 km from north to south with an area of more than 10000 km2, is the major part of the Sanjiang region in western Yunnan, SW China, and is one key area to study the evolution of the Tethys. Previous studies all agreed that the Lincang batholith was formed in the Triassic, and widely considered its formation to be the result of Paleo- Tethyan orogeny （Dong et al., 2013）. However, the early Ordovician syenogranite has been discovered recently for the first tirne in the Lincang batholith, and its petrologic and geochronological results are presented here to provide evidence in support of its association with Proto-Tethyan orogeny. This new discovery has important significance lbr understanding the geodynamic history of the Lincang batholith and tectonic evolution of the Sanjiang region.展开更多
The mineralization is related closely to sedimentation, diagenesis and hydrothermal processes. In this paper, investigations are carried out on coal occurrence, maceral composition, inorganic minerals, trace elements ...The mineralization is related closely to sedimentation, diagenesis and hydrothermal processes. In this paper, investigations are carried out on coal occurrence, maceral composition, inorganic minerals, trace elements and huminite reflectance. It is concluded that the source of Lincang superlarge deposit is mainly the muscovite granite in the west edge of the basin. During sedimentation, Ge (germanium) was leached out and entered the basin. Ge was adsorbed by lower organism and humic substances in water. Lincang lignite underwent three thermal processes: peatification, early diagenesis and hydrothermal transformation. During peatification, Ge was adsorbed or complexed by humic colloids. During early diagenesis, the Ge associated with humic acids was hard to mobilize or transport. Most of Ge entered the structure of huminite while a small amount of Ge was associated with residual humic acids as complex or humate. During hydrothermal transformation, the heated natural water or deep fluid from basement encountered the coal layer within tectonic weak zone. SO 2- 4 was reduced by coal organic matter. Pyrite and calcite formed. Hydrothermal process did not contribute significantly to mineralization.展开更多
Influenced by the Indosinian Lincang granite,the level the natural radioactivity in the Lincang Basin is relatively high.This work deals with the determination of natural radioactivity of soil in this area by using th...Influenced by the Indosinian Lincang granite,the level the natural radioactivity in the Lincang Basin is relatively high.This work deals with the determination of natural radioactivity of soil in this area by using theγ-ray spectrometer.The specific activities of 2 26Ra, 238U, 232Th and 40K obtained were obviously greater than the average values of these nuclides countrywide and worldwide,which were 53.4(from 38.7 to 62.8),161.2(from 127.3 to 211.7),120.9(from 106.5 to 140.6)and 632.2(from 521.7 to 707.5)Bq/kg.Based on the research data,the level of natural radioactivity of the granite was high,which impacts and provides a good source of soil radioactivity in the study area.To assess the radiological hazard of the natural radioactivity in soil,the γ-absorbed dose rate and annual effective dose rate were calculated.The results show that,although the γ-absorbed dose rate in the study area is a little high,the annual effective dose rate is lower than the recommended value.So the Lincang Basin is safe with respect to radiological level and its living environment is not affected.展开更多
Remote sense image interpretation and on-the-spot verifi cation were applied to investigate wetland resources in Lincang City. The investigation shows that wetland area in the city totals 29,102.61 hm^2, including nat...Remote sense image interpretation and on-the-spot verifi cation were applied to investigate wetland resources in Lincang City. The investigation shows that wetland area in the city totals 29,102.61 hm^2, including natural wetland 12,949.86 hm^2, artifi cial wetland 16,152.75 hm^2. Characteristics of the wetland resources in the city are concluded as "diversifi ed wetland types, small wetland area, high proportion of artifi cial wetland, and significant ecological niche. This paper pointed out problems in the wetland protection, such as aggravated pollution of wetland environment, invasion of alien species, and biocenosis changed by hydropower engineering, then gave corresponding protection countermeasures.展开更多
The mechanism of formation of the Lincang germanium deposit is discussed in thelight of the spatial distribution of Ge-rich coal and siliceous rocks, the sulfur isotopic composi-tion of pyrite in the Ge-rich coal, the...The mechanism of formation of the Lincang germanium deposit is discussed in thelight of the spatial distribution of Ge-rich coal and siliceous rocks, the sulfur isotopic composi-tion of pyrite in the Ge-rich coal, the variation of Ge abundance in the coal seams and the geo-chemical characteristics of the siliceous rocks. The results show that the siliceous rocks interca-lated with the coal seams were deposited from a hydrothermal medium through which germani-um was enriched in the coal beds. The primary source of germanium is thought to be the Ge-rich granite in the basement of the sedimentary basin.展开更多
为客观准确地评价临沧市普洱生茶的香气品质,本研究系统分析了16份临沧市普洱生茶的主要香气成分,并利用多元统计方法对其主要香气成分进行综合分析。结果表明:共检测到48个香气物质,平均含量大于2%的有11个;其中芳樟醇含量最高,平均含...为客观准确地评价临沧市普洱生茶的香气品质,本研究系统分析了16份临沧市普洱生茶的主要香气成分,并利用多元统计方法对其主要香气成分进行综合分析。结果表明:共检测到48个香气物质,平均含量大于2%的有11个;其中芳樟醇含量最高,平均含量为24.68%。在香气种类上,醇类物质占香气总量的比例最高,平均含量为46.55%;其次是醛类物质,平均含量为26.81%;酮类、酯类和其他类物质占香气总量的比例相对较小。多元统计方法分析表明:临沧市南、北部地区普洱生茶样品能够明显区分开,南部地区醇类、酯类物质含量相对较高,而北部地区醛类、酮类以及其他类物质含量相对较高,海拔高度可能是南、北部地区普洱生茶香气成分差异形成的重要原因;基于变量投影重要性(Variable important for the projection,VIP)大于1,筛选出23个香气成分或种类作为区分临沧市南、北部地区普洱生茶香气的重要标志物,其中芳樟醇、异佛尔酮、酮类、醇类、醛类、β-环柠檬醛、α-环柠檬醛、2,2,6-三甲基环己酮、橙花醇、β-紫罗兰酮的VIP值相对较大,对临沧市南、北部地区普洱生茶分类贡献较大。该研究为准确了解临沧市普洱生茶香气品质提供理论依据,也为临沧市普洱生茶品质、产地判定研究提供思路和方法。展开更多
The pests, diseases and weeds in sugarcane areas of Lincang Nanhua Sugar Industry Co.,Ltd. were investigated at seedling stage, growth stage and maturity stage of sugarcane from 2012 to 2016. The occurrence and damag...The pests, diseases and weeds in sugarcane areas of Lincang Nanhua Sugar Industry Co.,Ltd. were investigated at seedling stage, growth stage and maturity stage of sugarcane from 2012 to 2016. The occurrence and damage of diseases, pests and weeds were analyzed, and the problems in prevention and control were discussed based on the local conditions of sugarcane production. The species, occurrence and damage characteristics of diseases, pests and weeds were ascertained, and the corresponding strategies and technical measures were proposed.展开更多
基金financially supported by the National Nature Science Foundation of China(No.41602049)China Postdoctoral Science Foundation(No.2015M582529)+1 种基金China Geological Survey(No.121201010000150007-24 and DD20160107-03)the Foundation of Sichuan Education Department(Grant:16ZB0109)
文摘Objective The Lincang granitic batholith, extending over 370 km from north to south with an area of more than 10000 km2, is the major part of the Sanjiang region in western Yunnan, SW China, and is one key area to study the evolution of the Tethys. Previous studies all agreed that the Lincang batholith was formed in the Triassic, and widely considered its formation to be the result of Paleo- Tethyan orogeny （Dong et al., 2013）. However, the early Ordovician syenogranite has been discovered recently for the first tirne in the Lincang batholith, and its petrologic and geochronological results are presented here to provide evidence in support of its association with Proto-Tethyan orogeny. This new discovery has important significance lbr understanding the geodynamic history of the Lincang batholith and tectonic evolution of the Sanjiang region.
文摘The mineralization is related closely to sedimentation, diagenesis and hydrothermal processes. In this paper, investigations are carried out on coal occurrence, maceral composition, inorganic minerals, trace elements and huminite reflectance. It is concluded that the source of Lincang superlarge deposit is mainly the muscovite granite in the west edge of the basin. During sedimentation, Ge (germanium) was leached out and entered the basin. Ge was adsorbed by lower organism and humic substances in water. Lincang lignite underwent three thermal processes: peatification, early diagenesis and hydrothermal transformation. During peatification, Ge was adsorbed or complexed by humic colloids. During early diagenesis, the Ge associated with humic acids was hard to mobilize or transport. Most of Ge entered the structure of huminite while a small amount of Ge was associated with residual humic acids as complex or humate. During hydrothermal transformation, the heated natural water or deep fluid from basement encountered the coal layer within tectonic weak zone. SO 2- 4 was reduced by coal organic matter. Pyrite and calcite formed. Hydrothermal process did not contribute significantly to mineralization.
文摘Influenced by the Indosinian Lincang granite,the level the natural radioactivity in the Lincang Basin is relatively high.This work deals with the determination of natural radioactivity of soil in this area by using theγ-ray spectrometer.The specific activities of 2 26Ra, 238U, 232Th and 40K obtained were obviously greater than the average values of these nuclides countrywide and worldwide,which were 53.4(from 38.7 to 62.8),161.2(from 127.3 to 211.7),120.9(from 106.5 to 140.6)and 632.2(from 521.7 to 707.5)Bq/kg.Based on the research data,the level of natural radioactivity of the granite was high,which impacts and provides a good source of soil radioactivity in the study area.To assess the radiological hazard of the natural radioactivity in soil,the γ-absorbed dose rate and annual effective dose rate were calculated.The results show that,although the γ-absorbed dose rate in the study area is a little high,the annual effective dose rate is lower than the recommended value.So the Lincang Basin is safe with respect to radiological level and its living environment is not affected.
文摘Remote sense image interpretation and on-the-spot verifi cation were applied to investigate wetland resources in Lincang City. The investigation shows that wetland area in the city totals 29,102.61 hm^2, including natural wetland 12,949.86 hm^2, artifi cial wetland 16,152.75 hm^2. Characteristics of the wetland resources in the city are concluded as "diversifi ed wetland types, small wetland area, high proportion of artifi cial wetland, and significant ecological niche. This paper pointed out problems in the wetland protection, such as aggravated pollution of wetland environment, invasion of alien species, and biocenosis changed by hydropower engineering, then gave corresponding protection countermeasures.
文摘The mechanism of formation of the Lincang germanium deposit is discussed in thelight of the spatial distribution of Ge-rich coal and siliceous rocks, the sulfur isotopic composi-tion of pyrite in the Ge-rich coal, the variation of Ge abundance in the coal seams and the geo-chemical characteristics of the siliceous rocks. The results show that the siliceous rocks interca-lated with the coal seams were deposited from a hydrothermal medium through which germani-um was enriched in the coal beds. The primary source of germanium is thought to be the Ge-rich granite in the basement of the sedimentary basin.
文摘为客观准确地评价临沧市普洱生茶的香气品质,本研究系统分析了16份临沧市普洱生茶的主要香气成分,并利用多元统计方法对其主要香气成分进行综合分析。结果表明:共检测到48个香气物质,平均含量大于2%的有11个;其中芳樟醇含量最高,平均含量为24.68%。在香气种类上,醇类物质占香气总量的比例最高,平均含量为46.55%;其次是醛类物质,平均含量为26.81%;酮类、酯类和其他类物质占香气总量的比例相对较小。多元统计方法分析表明:临沧市南、北部地区普洱生茶样品能够明显区分开,南部地区醇类、酯类物质含量相对较高,而北部地区醛类、酮类以及其他类物质含量相对较高,海拔高度可能是南、北部地区普洱生茶香气成分差异形成的重要原因;基于变量投影重要性(Variable important for the projection,VIP)大于1,筛选出23个香气成分或种类作为区分临沧市南、北部地区普洱生茶香气的重要标志物,其中芳樟醇、异佛尔酮、酮类、醇类、醛类、β-环柠檬醛、α-环柠檬醛、2,2,6-三甲基环己酮、橙花醇、β-紫罗兰酮的VIP值相对较大,对临沧市南、北部地区普洱生茶分类贡献较大。该研究为准确了解临沧市普洱生茶香气品质提供理论依据,也为临沧市普洱生茶品质、产地判定研究提供思路和方法。
基金Supported by Special Fund for China Agricultural Industry Research System(CARS-170303)Special Fund for Agricultural Industry Research System of Yunnan Province(YNGZTX-4-92)
文摘The pests, diseases and weeds in sugarcane areas of Lincang Nanhua Sugar Industry Co.,Ltd. were investigated at seedling stage, growth stage and maturity stage of sugarcane from 2012 to 2016. The occurrence and damage of diseases, pests and weeds were analyzed, and the problems in prevention and control were discussed based on the local conditions of sugarcane production. The species, occurrence and damage characteristics of diseases, pests and weeds were ascertained, and the corresponding strategies and technical measures were proposed.
