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Evaluation of the Efficacy of Essential Oil Extracts in the Control of Termites (Isoptera: Termitidae) in Cashew Orchards in Badikaha (Côte d’Ivoire)
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作者 Adama Coulibaly Magloire Yves Minhibo +4 位作者 Charles Konan Kouakou Sylvain Bi Tra Djata Sanogo Lassina Fondio Mudde Barnabas 《Advances in Entomology》 2024年第2期93-104,共12页
Cashew tree has gradually moved from a purely ecological aspect to a socio-economic one, due to the marketing of its nuts. But production per area, estimated at between 424 and 547 kg/ha, remains low, in contrast to I... Cashew tree has gradually moved from a purely ecological aspect to a socio-economic one, due to the marketing of its nuts. But production per area, estimated at between 424 and 547 kg/ha, remains low, in contrast to India (2<sup>nd</sup> largest producer) and Vietnam (3<sup>rd</sup> largest producer), whose yields range from 1000 to 1500 and 2000 to 2500 kg/ha respectively. This low yield is due to a number of factors, among which insect pests are the most damaging. Among these insects, termites are considered to be one of the main pests of cashew trees. The general objective of this study is to contribute to termite management through the use of bioinsecticides, an alternative to the use of chemicals in cashew orchards. Five (5) biological products were tested: Limocide, Carapa oil, Neem oil, Kitana and Kaskara. Among them, two products proved effective, with a mortality rate of over 50%. These were Limocide, whose LC50 was obtained in 24 h at a dose of 3.6 g/ml and 3.1 g/ml , giving a mortality rate of 57.66% ± 4.04% and 51.33 ± 2.08 respectively , and Carapa, at a dose of 4.5 g/ml, with an estimated mortality rate of 52.33% ± 1.52%. Such results have demonstrated the potential application of Limocide and Carapa biopesticides to sustainably control termites in cashew orchards of Côte d’Ivoire. 展开更多
关键词 termitE Pest Organic Products Cashew Tree Côte d’Ivoire
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西非Termit盆地石油地质特征及成藏主控因素
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作者 陈长伟 汤戈 +4 位作者 周博宇 苏俊青 郭怡辉 滑双君 葛维 《西北地质》 CAS CSCD 北大核心 2024年第3期223-236,共14页
西非Termit盆地是中国石油在非洲极为重要的勘探开发区块。在充分利用钻井、分析化验和地震资料基础上,开展了Termit盆地石油地质特征和成藏主控因素研究,研究表明:①Ter-mit盆地历经前裂谷期、同裂谷期、后裂谷期三大构造演化阶段,同... 西非Termit盆地是中国石油在非洲极为重要的勘探开发区块。在充分利用钻井、分析化验和地震资料基础上,开展了Termit盆地石油地质特征和成藏主控因素研究,研究表明:①Ter-mit盆地历经前裂谷期、同裂谷期、后裂谷期三大构造演化阶段,同裂谷期发育早晚两期裂谷作用形成中生代—新生代叠置裂谷盆地,宏观具有“东西分带、南北分块”的构造结构特征,控制圈闭的形成与分布。②发育上白垩统Yogou组分布广(18000 km^(2))、厚度大(600~1400 m)、成熟度适中(Ro值为0.7%~1.3%)的海相烃源岩,配置上白垩统Yogou组顶部发育的海相三角洲、古近系Sokor1组辫状河三角洲砂体,及古近系Sokor2组区域性分布的泥岩盖层,形成了上、下两套成藏组合;③明确古近系、白垩系成藏主控因素,古近系为“下生上储”的次生油气藏,油气平面和垂向分布受生烃灶、区域盖层、油源断层和优势沉积相控制,白垩系为“自生自储”原生油藏,油气富集受区域构造活动强度和白垩系内幕构造控制。④构建了基于海相广覆式烃源岩的跨世代油气成藏模式,明确Dinga断阶带、Fana凸起和Araga地堑是古近系油气勘探的有利区带,造活动相对较弱的Moul凹陷及Dinga断阶带南部是白垩系油气勘探的有利区带。地质认识指导勘探部署,在尼日尔Termit盆地获得了重大勘探突破,累计探明石油地质储量超7亿t,为中国石油海外油气增储上产奠定了坚实的基础。 展开更多
关键词 石油地质 termit盆地 地质特征 主控因素 油气富集
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尼日尔Termit盆地东北部上白垩统Donga组烃源岩发育影响因素与发育模式
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作者 宋换新 李巨露 +2 位作者 文志刚 程顶胜 袁圣强 《长江大学学报(自然科学版)》 2024年第6期23-33,共11页
上白垩统Donga组是Termit盆地Trakes斜坡新确认的重要烃源岩层位,对其发育机理进行深入研究对该区油气成藏规律认识和勘探突破有重要意义。在该区三口探井Donga组钻、测井资料综合分析及采样分析的基础上,对Trakes斜坡及周缘地区Donga... 上白垩统Donga组是Termit盆地Trakes斜坡新确认的重要烃源岩层位,对其发育机理进行深入研究对该区油气成藏规律认识和勘探突破有重要意义。在该区三口探井Donga组钻、测井资料综合分析及采样分析的基础上,对Trakes斜坡及周缘地区Donga组优质烃源岩发育的影响因素进行了分析,并建立其发育模式。结果表明:Termit盆地Trakes斜坡及周缘地区Donga组优质烃源岩十分发育,有机质丰度高,有机质类型为混合型(Ⅱ型),生烃潜力大;晚白垩世早期全球为典型温室气候,炎热温暖潮湿的气候条件下陆源高等植物和水生低等生物均很繁盛,为沉积水体提供充足的有机质;区域稳定的热沉降作用及全球高海平面导致持续的海侵作用,底层水体形成的弱还原性环境,为沉积有机质的保存和富集提供了良好的场所。综上建立了Donga组“陆源海相”浅海泥质陆棚优质烃源岩发育模式。 展开更多
关键词 烃源岩 Donga组 发育模式 保存条件 地球化学 termit盆地
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Evaluation of the virulence of entomopathogenic fungus, Isaria fumosorosea isolates against subterranean termites Coptotermes spp.(Isoptera:Rhinotermitidae) 被引量:2
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作者 J.J.Jessica T.L.Peng +2 位作者 A.S.Sajap S.H.Lee S.A.Syazwan 《Journal of Forestry Research》 SCIE CAS CSCD 2019年第1期213-218,共6页
The entomopathogenic fungus Isaria fumosorosea Wize, formerly known as Paecilomyces fumosoroseus is reported as a promising biocontrol agent for controlling subterranean termites, particularly those belonging to the f... The entomopathogenic fungus Isaria fumosorosea Wize, formerly known as Paecilomyces fumosoroseus is reported as a promising biocontrol agent for controlling subterranean termites, particularly those belonging to the family Rhinotermitidae. In Malaysia, the family Rhinotermitidae includes two species of subterranean termites with extremely high economic importance; namely Coptotermes curvignathus Holmgren, and the Asian SLubterranean Termite (Coptotermes gestroi Wasmann). To comprehend the potential control of this soil-dwelling fungus against these subterranean termites in Malaysia, an investigation was carried out by testing the pathogenecity of 11 isolates against these termite species. All isolates showed pathogenic potential against the termite (Mortality rate of C. curvignathus:84.4%; C. gestroi:67.3%). IsolatePF49 was the most effective against both species of termites and was further tested for its virulence and mycosis.The LC_(50) values of PF49 against C. curvignathus and C.gestroi were 7.55×103 and 1.09×102 conidia/ml,respectively. The average number of days required to complete the mycosis process in C. curvignathus and C.gestroi were 4.7 and 8 days, respectively. These fungi are believed useful for protecting living trees, plants, wood,wood structures, and other cellulosic materials susceptible to termite infestation and damage. 展开更多
关键词 Biological control ENTOMOPATHOGENIC fungus SUBTERRANEAN termites Lethal concentration
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Effects of Selected Pesticidal Plants on Termites Affecting Maize Production in Arusha, Tanzania 被引量:1
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作者 Shaban James Patrick A. Ndakidemi Ernest R. Mbega 《American Journal of Plant Sciences》 2020年第3期510-527,共18页
Investigations under laboratory and field conditions were carried out with purpose of understanding the effects of pesticides of Cupressus lusitanica, Tephrosia vogelii, Eucalpytus dalrympleana, Lantana camara and Aza... Investigations under laboratory and field conditions were carried out with purpose of understanding the effects of pesticides of Cupressus lusitanica, Tephrosia vogelii, Eucalpytus dalrympleana, Lantana camara and Azadirachta indica in the control of termites which affect maize production in Arusha, Tanzania. Termites were collected before and during maize season of 2018 and identified at the Tropical Pesticides Research Institute (TPRI) laboratory. A total of 5279 out of 5307 termite species identified belong to genus Macrotermes, 23 species to genus Odontotermes and 5 species were unknown. The results entailed that the area is rich in species of genus Macrotermes. Moreover, concentrations i.e. 5 g, 10 g and 20 g of each botanical were tested for Macrotermes spp. mortality and repellency ability in the laboratory using a completely randomized design (CRD) with three replicates. The results showed that 98.33% Macrotermes spp. mortality was caused by T. vogelii followed by 93.33% recorded from E. dalrympleana after 24 hours. Besides, C. lusitanica repelled Macrotermes spp. by 97% followed by 95% recorded from T. vogelii and E. dalrympleana each. For field trials, 20 g of each botanical was applied using randomized complete block design (RCBD) with four replicates. The results obtained from field indicated that T. vogelii was more effective to protect maize with an average of 6 maize stands and 3.4 kg of dry total weight of maize grains next to positive control per plot. Also, average of 4 maize stands and 3 kg dry total weight of maize grains were recorded from treatments of E. dalrympleana and C. lusitanica each. Such results highlight the potential of developing bio-termiticides from T. vogelii, C. lusitanica and E. dalrympleana to control Macrotermes spp. 展开更多
关键词 Damage MORTALITY Pesticidal Plants REPELLENCY termites MAIZE
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Analysis of Feed Preference of Edible Termites (Isoptera) on Selected Plants and Their Crude Extract Phytochemistry 被引量:1
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作者 C. M. Ameka Benard Muok Helida Oyieke 《Advances in Entomology》 2022年第1期52-62,共11页
Termites are social insects that inhabit colonies in the soil. Termites feed on a wide range of plants found within diverse habitats of Luanda Sub-County. This study aimed at assessing feed preference of edible termit... Termites are social insects that inhabit colonies in the soil. Termites feed on a wide range of plants found within diverse habitats of Luanda Sub-County. This study aimed at assessing feed preference of edible termites and analyzing their phytochemical composition. Termites were exposed to ten different test plants in their natural habitats to assess feed preference. Forty-seven study sites were selected as they had high termite abundance from previous studies. The test plants were <i></span><i><span style="font-family:Verdana;">Grevillea robusta</i></span></i><span style="font-family:Verdana;">, sugarcane, maize, blue citronella grass, <i></span><i><span style="font-family:Verdana;">Eucalyptus</i></span></i><span style="font-family:Verdana;">, mango, avocado, neem, bamboo and a mixture of all the ten plants. Small pits were dug in the ground where the ten treatments were placed and replicated four times each. The test plants were placed in the evening then covered with soil block. The number of termites feeding on the test plants was counted after 12 hours the following day. There were separate trials for crushed and uncrushed feed substrates. The feed substrates that showed high feed preference was selected for phytochemical analysis. The plants whose crude extract was obtained were </span><i><span style="font-family:Verdana;">Grevillea robusta,</span></i><span style="font-family:Verdana;"> bamboo, <i></span><i><span style="font-family:Verdana;">Eucalyptus</i></span></i><span style="font-family:Verdana;">, cypress, maize and sugarcane. The results for this study were analysed using one-way ANOVA. The study revealed that crushed feed substrates had a high level of feed preference by termites p < 0.05. The mixture of all the feed substrates also showed high termite preference and a mean and SE of 676.500 ± 41.7<sup></span><sup><span style="font-family:Verdana;">a</span></sup><span style="font-family:Verdana;"></sup>. Phytochemical analysis of the crude plant extracts revealed that </span><i><span style="font-family:Verdana;">Eucalyptus</span></i><span style="font-family:Verdana;"> had the highest number of phytochemicals present 9 out of 12. The identified phytochemicals were saponins, tannins, alkaloids, resins, cardiac glycosides, carbohydrates, phenols and flavones. 展开更多
关键词 termites Substrate PHYTOCHEMICAL
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Assemblages and species diversity of wood destroying termites in different land use systems in Western Ghat, India
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作者 Rashmi Ramesh Shanbhag R. Sundararaj 《Journal of Forestry Research》 SCIE CAS CSCD 2013年第2期361-364,共4页
Spatial distribution, abundance and assemblage of termites depend mainly on the local conditions and habitats in which they thrive. Striking differences are observed in the species richness, number of clades and funct... Spatial distribution, abundance and assemblage of termites depend mainly on the local conditions and habitats in which they thrive. Striking differences are observed in the species richness, number of clades and functional diversity of termite assemblage between different habitats. This study aim was to examine effect of human interference in the diversity of wood destroying termite in forest areas as well as managed and unmanaged plantations in South India. Termites attacking trees and wooden logs were collected from forest areas, managed plantations and unmanaged plantations. The termites collected were identified and compared for species abundance, richness and species diversity. Results show that the species composition and species diversity of the wood destroying termites vary according to the conditions. The species diversity measures revealed that there is a significance variation among the forest fauna and plantations. The forest areas have the highest species composition compared to plantations. Species richness is high forest areas. Even though the abundance of termites are more in unmanaged plantations, there is no significant difference related to species diversity among the managed and unmanaged plantations. 展开更多
关键词 WOOD termitE distribution ABUNDANCE ASSEMBLAGE
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Electrical Performance and Effect of Frequency Electromagnetic Waves on Subterranean Termites <i>Coptotermes curvignathus</i>Holmgren
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作者 Seno D. Panjaitan Farah Diba +1 位作者 Ferry Hadary Tsuyoshi Yoshimura 《Journal of Electromagnetic Analysis and Applications》 2014年第1期1-7,共7页
The research aimed to propose a non-destructive technology to control subterranean termites Coptotermes curvignathus Holmgren infestation based on electromagnetic waves. A portable apparatus for this technology has be... The research aimed to propose a non-destructive technology to control subterranean termites Coptotermes curvignathus Holmgren infestation based on electromagnetic waves. A portable apparatus for this technology has been built and its experiment is presented in this paper. Some electrical parameters were measured and analyzed along with their effects to the termites. The experiment using frequency range between 30 Hz - 600 kHz has been done. The average error of the apparatus by comparing the result with the direct measurement using oscilloscope was also measured. The highest error value appeared at 600 kHz with frequency error 6.05 kHz. The highest error of voltage (i.e. 0.186 Volt) appeared at 100 kHz. For safetiness, the highest magnetic field at 300 kHz was 0.1815 μT and at 500 kHz was 0.00725 μT which were safe for human. The average value of termites mortality was higher on irradiation time 120 minutes than 60 minutes respectively in all test frequency: 300 kHz, 400 kHz, 500 kHz and 600 kHz. This paper presents an important information of the electromagnatic-based technology for environmental friendly termites control in spite of using the insecticides. 展开更多
关键词 Electromagnetic Waves FREQUENCY SUBTERRANEAN termites COPTOTERMES curvignathus termites Infestation
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Polyethism in Termites
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作者 Ehsan Soleymaninejadian Zhongji Bao +2 位作者 Shuwen Liu Shilin Ji Jiajia Liu 《Advances in Entomology》 2014年第3期129-134,共6页
Polyethism or division of works among workers of social insects is always a hot issue among entomologists. Honey bees, ants, and wasps are the main target for scientists to study the division of works. Studying polyet... Polyethism or division of works among workers of social insects is always a hot issue among entomologists. Honey bees, ants, and wasps are the main target for scientists to study the division of works. Studying polyethism in termites has been increased recently due to the damages to the forests, buildings, boats and even water preserving monuments. Every year a huge amount of money is spent to control these isopteran social insects in the south east of Asia, the US, Australia and other tropical and subtropical regions. As understanding the polyethism in these social insects can be a hand in controlling them, in this review we have tried to explain different kinds of polyethism and their importance in these social insects. 展开更多
关键词 SOCIAL INSECTS ISOPTERA termitE POLYETHISM
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Natural Resistance of Two Plantation Woods Populus × canadensis cv. and Cunninghamia lanceolata to Decay Fungi and Termites
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作者 XingJia-qi MomoharaIkuo OhmuraWakako 《Forestry Studies in China》 CAS 2005年第1期36-39,共4页
Natural durability of two plantation woods, Chinese fir and I-214 poplar, was investigated thoroughly by three test- ing methods, namely an accelerated laboratory decay test, a fungus cellar test and a field test. Af... Natural durability of two plantation woods, Chinese fir and I-214 poplar, was investigated thoroughly by three test- ing methods, namely an accelerated laboratory decay test, a fungus cellar test and a field test. After the decay test using Postia pla- centa and Trametes versicolor, Chinese fir and the I-214 poplar showed 34% and 69% of mass loss, respectively, indicating they should be classified as slightly durable and non-durable wood. This conclusion was confirmed by the fungus cellar test and the field test. Like the performance in the decay test, I-214 poplar showed no resistance to termites either in the laboratory or in the field, whereas Chinese fir would be classified as moderately resistant. 展开更多
关键词 plantation Chinese fir plantation I-214 poplar natural resistance to decay fungi and termites
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Morphological Identification of Edible Termites (Isoptera) in Luanda Sub-County, Kenya
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作者 Ameka Caleb Oyieke Helida +1 位作者 Elisheba Amolo Muok Benard 《Advances in Entomology》 2022年第2期159-174,共16页
Termites are social insects that live in colonies underground. Globally, there are 3000 termite species, of which 39% are found in Africa. Termites are used as food and livestock feed in most communities of the world.... Termites are social insects that live in colonies underground. Globally, there are 3000 termite species, of which 39% are found in Africa. Termites are used as food and livestock feed in most communities of the world. In Kenya, termites are consumed by many communities, especially in the western region. Termite species diversity across different parts of the Luanda sub-county was established as there are many edible and non-edible species in the area. This study assessed the species diversity of termites in Luanda sub-county, and characterized them morphologically. Termites were sampled in Luanda sub-county using the line transect method. The collected termites were preserved in tubes containing 70% Ethanol. The preserved samples were taken to the National Museums of Kenya for morphological identification up to species level. Species richness of each habitat was analyzed for diversity (Shannon-Wiener) index and Shannon index by using Vegan package version 1.16 - 32 in R. The differences in species composition and diversity of termites were analyzed using one-way ANOVA. Morphological identification recorded seven species, namely, Macrotermes herus, Macrotermes spp1, Macrotermes sp1, Pseudocanthotermes grandiceps, Macrotermes bellicosus, Macrotermes spp2 and Pseudocanthotermes militaris. The results of this study showed that the Shannon diversity index H was 0.3606 while Simpson index D was 0.20644, which implied a high species diversity of termites in Luanda sub-county a leading producer of edible termites in Kenya. 展开更多
关键词 termitE MORPHOLOGICAL Species Diversity
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Termites Improve the Horizontal Movement of Carbonized Particles:A Step towards Sustainable Utilization of Biochar
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作者 Mazhar Ali Nasir Masood +6 位作者 Hafiz Muhammad Rashad Javeed Ibrahim Al-Ashkar Khalid F.Almutairi Liyun Liu Muhammad Aqeel Sarwar Karthika Rajendran Ayman EL Sabagh 《Phyton-International Journal of Experimental Botany》 SCIE 2022年第10期2235-2248,共14页
Soil amendments containing carbonized materials increase the soil carbon reservoir,influence plant productivity,and,ultimately,help to clean the environment.There is data on the effect of such additions on soil physic... Soil amendments containing carbonized materials increase the soil carbon reservoir,influence plant productivity,and,ultimately,help to clean the environment.There is data on the effect of such additions on soil physicochemical properties or plant growth,but few studies have focused on how these carbonized materials are distributed by termite species in the soil ecosystem.It is the first comprehensive study of the transportation of biochar(BC)by termite species under tropical environmental conditions in Pakistan.The present study was carried out to test the hypothesis that if termite species I)were involved in the distribution of biochar particles II)if yes,then how far these particles were transported during the study period(10 days)and III)check their preference between the enriched BC(EBC)and non-enriched BC.BC was enriched with the cattle slurry after its pyrolysis in the study.The results showed that EBC particles were significantly more widely distributed than non-enriched BC particles,but both types of BC were transported more than 4 cm(ring 4)within 10 days(at the end of the experiment).The current study also revealed that EBC was easily attached to the setae,cuticle,and legs of termites,implying that it could potentially be transported over a greater distance.Furthermore,transportation of EBC over larger distances indicated a potential preference of termite species between the EBC and BC particles.During the study,however,the preference among the termite species was also observed.Under the prevailing study conditions,the Coptotermes heimi and Heteroterme indicola species transported the EBC further than Microtermes obesi and Odontotermes obesus.These findings revealed that transportation preferences were observed among the four termite species.In conclusion,the current study found that termites were involved in the distribution of BC particles,with a preference for EBC and that these have the potential to transport BC particles more than 4 cm within 10 days.Furthermore,two species Coptotermes heimi and Heteroterme indicola may be more suitable candidates for EBC transpiration in Pakistani soils.It was necessary to conduct additional research into the effect of temperature on the transportation process. 展开更多
关键词 Enriched biochar termite species distribution micro-particles feeding stations soil productivity
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Termite Attack and Damage in Cocoa Plantations in Daloa Department, Central-Western Côte d’Ivoire
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作者 Yao Martin Siapo Ehui Joachim Ano +1 位作者 Yao Kan Séraphin Diby Annick Yamousso Tahiri 《American Journal of Plant Sciences》 CAS 2024年第10期996-1009,共14页
Cocoa farming faces numerous constraints that affect production levels. Among these constraints are termites, one of the biggest scourges in tropical agriculture and agroforestry. The aim of this study is to assess th... Cocoa farming faces numerous constraints that affect production levels. Among these constraints are termites, one of the biggest scourges in tropical agriculture and agroforestry. The aim of this study is to assess the level of damage caused by termites in cocoa plantations. To this end, 3 plantations were selected. In each of the 3 plantations, 18 plots containing an average of 47 ± 6 cocoa plants were delimited. Sampling was based on 25 cocoa plants per plot. The study consisted in sampling the termites observed on the plants and noting the type of damage caused by them, taking into account the density of the harvest veneers and, above all, the termites’ progress through the anatomical structures of the plant, i.e. the bark, sapwood and heartwood. A total of 8 termite species were collected from cocoa plants. These species are responsible for four types of damage (D1, D2, D3 and D4), grouped into minor damage (D1 and D2) and major damage (D3 and D4). D1 damage ranged from 24.67% ± 5.64% to 39.55% ± 7.43%. D2 damage ranged from 6.88% ± 1.31% to 9.33% ± 2.79%. D3 damage ranged from 2.88% ± 1.55% to 6.44% ± 1.55%. D4 damage ranged from 1.11% ± 1% to 3.11% ± 1.37%. Among the termite species collected, Microcerotermes sp, C. sjostedti, A. crucifer and P. militaris were the most formidable on cocoa trees in our study locality. In view of the extensive damage caused by termites, biological control measures should be considered, using insecticidal plants. 展开更多
关键词 termites ATTACKS DAMAGE Cocoa Trees Côte d’Ivoire
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New Development in Control of Bank Termites in China
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《中山大学学报论丛》 1995年第3期241-241,共1页
关键词 BANK New Development in Control of Bank termites in China
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Preliminary Study of Chemical Elements Distribution in Petroleum Source Rocks Donga and Yogou Formations of the Termit Sedimentary Basin (Est-Niger)
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作者 Alassane Ibrahim Maman Bachir Abdoulaye Dan Makaou Oumarou +2 位作者 Baraou Idi Souley Kouakou Alponse Yaou Abdoulwahid Sani 《Journal of Minerals and Materials Characterization and Engineering》 2024年第1期49-62,共14页
XRF and EDX analyses were carried out on 18 batches of representative raw samples to determine the distribution of major chemical elements in the petroleum source rocks of Donga and Yogou formations of Termit sediment... XRF and EDX analyses were carried out on 18 batches of representative raw samples to determine the distribution of major chemical elements in the petroleum source rocks of Donga and Yogou formations of Termit sedimentary basin. The chemical composition of these formations is dominated by silicon (Si), aluminum (Al) and iron (Fe). This is consistent with the oxide composition, which is also dominated by silicon oxide (SiO2), aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) and iron monoxide (FeO). No less important chemical elements are calcium (Ca), potassium (K), sulfur (S), titanium (Ti), magnesium (Mg), manganese (Mn) and barium (Ba), as well as some of their oxides. All these major chemical elements are carried by silicate detrital minerals associated with pyrite and goethite and/or clay minerals such as kaolinite and interstratified illite, smectite and chlorite. This trend is illustrated by the values of the Si/Al and SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratios. 展开更多
关键词 DISTRIBUTION Major Elements Source Rocks Donga Formation Yogou Formation termit Basin
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裂谷作用对层序地层充填样式的控制——以西非裂谷系Termit盆地下白垩统为例 被引量:21
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作者 吕明胜 薛良清 +4 位作者 苏永地 万仑坤 毛凤军 刘计国 王玉华 《吉林大学学报(地球科学版)》 EI CAS CSCD 北大核心 2012年第3期647-656,共10页
Termit盆地位于尼日尔东南部,属于西非裂谷系的北延部分,是发育于前寒武系—侏罗系基底之上的中、新生代裂谷盆地。该盆地早白垩世—古近纪经历了'裂谷—坳陷—裂谷'的构造演化过程及'陆相—海相—陆相'的沉积演化过程... Termit盆地位于尼日尔东南部,属于西非裂谷系的北延部分,是发育于前寒武系—侏罗系基底之上的中、新生代裂谷盆地。该盆地早白垩世—古近纪经历了'裂谷—坳陷—裂谷'的构造演化过程及'陆相—海相—陆相'的沉积演化过程,表现为晚白垩世大规模海侵、早白垩世和古近纪两期裂谷叠置的特点。基于构造作用影响裂谷盆地层序发育的观点,分析了Termit盆地下白垩统裂谷阶段内的层序地层充填样式。根据裂谷作用的强弱,将早白垩世裂谷阶段划分为裂谷初始期、裂谷深陷期及裂谷萎缩期3个阶段。裂谷初始期层序断裂活动弱,构造沉降小,长轴物源体系较为发育,陡坡带为加积至退积型河流或三角洲沉积,缓坡带发育加积型河流或三角洲体系。裂谷深陷期层序断裂活动强烈,构造沉降大,陡坡带形成退积型水下扇或滑塌扇沉积,缓坡带发育退积型三角洲体系,盆地中心为泥岩充填。裂谷萎缩期层序断裂活动减弱并趋于停止,陡坡带为进积型扇三角洲沉积,缓坡带发育进积型三角洲体系。研究表明:裂谷作用对层序地层充填样式具有明显的控制作用,以构造作用为主线的裂谷盆地层序地层分析方法,能有效预测沉积体系和储层分布。 展开更多
关键词 裂谷盆地 裂谷作用阶段 层序地层充填样式 termit盆地 西非裂谷系 沉积
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尼日尔Termit裂谷型叠合盆地油气成藏特征与主控因素 被引量:17
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作者 周立宏 苏俊青 +5 位作者 董晓伟 史卜庆 孙志华 钱茂路 楼达 刘爱平 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2017年第3期330-339,共10页
基于中—西非裂谷系构造演化及沉积充填特征研究,结合区域地质背景,对尼日尔Termit裂谷型叠合盆地的油气成藏特征进行剖析,并探讨其油气富集主控因素。Termit盆地是早白垩世、古近纪2期断陷活动形成的裂谷型叠合盆地,发育1套广泛分布的... 基于中—西非裂谷系构造演化及沉积充填特征研究,结合区域地质背景,对尼日尔Termit裂谷型叠合盆地的油气成藏特征进行剖析,并探讨其油气富集主控因素。Termit盆地是早白垩世、古近纪2期断陷活动形成的裂谷型叠合盆地,发育1套广泛分布的上白垩统Yogou组海相烃源岩。古近系Sokor组1段和白垩系Yogou组2套储集层以石英砂岩为主,具有较好的孔渗特征,在古近系Sokor组2段区域盖层之下可形成多套有利储盖组合。断裂样式与油气运聚方式决定了构造带油气运聚模式,形成Araga地堑"Y"型油气侧向及垂向运聚模式、Dinga断阶"多阶型"油气垂向运聚模式和Fana转换带"复式"油气运聚模式。油气富集受裂谷盆地构造控制,即2期裂谷作用形成的断裂带控制油气的平面展布,晚期裂谷层序内的有利储盖组合控制油气垂向富集程度。 展开更多
关键词 尼日尔 termit盆地 裂谷型叠合盆地 油气成藏特征 成藏主控因素
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尼日尔Termit盆地及其周缘晚白垩世古地理演化 被引量:22
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作者 毛凤军 刘若涵 +6 位作者 刘邦 姜虹 刘计国 王旭影 汤望新 郑凤云 李早红 《地学前缘》 EI CAS CSCD 北大核心 2016年第3期186-197,共12页
Termit盆地及其周缘是中西非裂谷中典型的中、新生代裂谷盆地,也是中石油海外最具潜力的风险勘探区,但由于多期构造运动的复杂性,研究区晚白垩世的古地理演化缺乏系统的分析研究。本文将Termit盆地及其周缘作为研究区域,在构造演化的基... Termit盆地及其周缘是中西非裂谷中典型的中、新生代裂谷盆地,也是中石油海外最具潜力的风险勘探区,但由于多期构造运动的复杂性,研究区晚白垩世的古地理演化缺乏系统的分析研究。本文将Termit盆地及其周缘作为研究区域,在构造演化的基础上利用地球化学、地层学及地球物理等手段进一步分析了研究区的古沉积环境、古气候及古物源,最终明确了晚白垩世的古沉积演化。研究认为,晚白垩世早期的森诺曼阶(Cenomanian)研究区开始发生海侵,三冬阶(Santonian)时期达到最大海侵范围,之后开始逐渐海退的过程。马斯特里赫特阶(Maastrichtian)时期的区域构造挤压事件使盆地形态发生改变,该构造事件最终以区域不整合结束。地球化学资料、岩性资料以及地震资料综合表明,森诺曼阶(Cenomanian)—三冬阶(Santonian)时期研究区处于偏还原的浅海陆架沉积,属典型的热带气候,接受来自北东向的物源供给;至坎潘阶(Campanian)—马斯特里赫特阶(Maastrichtian)时期,伴随着海平面的下降,研究区由海相沉积逐渐转变为海陆过渡相沉积,且物源主要来自于北东及南西两个方向。本次研究明确了Termit盆地及其周缘在晚白垩世的古沉积演化过程,这为进一步明确研究区的沉积体系及砂体的预测提供了理论依据。 展开更多
关键词 构造演化 沉积环境 古地理演化 晚白垩世 termit盆地 中西非裂谷系
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Termit盆地构造变形的力学机制 被引量:24
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作者 张庆莲 侯贵廷 +2 位作者 潘校华 万伦坤 毛凤军 《大地构造与成矿学》 EI CAS CSCD 北大核心 2013年第3期377-383,共7页
Termit盆地是中西非裂谷系中典型的中-新生代裂谷盆地,形成于早白垩世大西洋张裂的构造背景下。在白垩纪至古近纪经历了"裂谷-坳陷-裂谷"的构造演化过程,且两期裂陷作用形成的断裂走向不同。依据Termit盆地的基础构造特征,运... Termit盆地是中西非裂谷系中典型的中-新生代裂谷盆地,形成于早白垩世大西洋张裂的构造背景下。在白垩纪至古近纪经历了"裂谷-坳陷-裂谷"的构造演化过程,且两期裂陷作用形成的断裂走向不同。依据Termit盆地的基础构造特征,运用弹性有限元数值模拟方法,从动力学角度讨论盆地构造演化模式,为盆地的构造演化研究提供动力学依据。模拟结果表明,在早白垩世,盆地受区域NE-SW向拉张作用,在盆地西部边界发育一系列NW-SE向早白垩世早期断层。在古近纪,盆地受近EW向拉张作用,在盆地西部受早期断层影响较大的Dinga断阶带和Yogou西斜坡地区,局部应力场使断层发育走向为NW-SE;受其影响较小的Araga地堑发育张扭性断层,沿早白垩世断层呈雁行排列;不受其影响的Fana低凸起和Moul凹陷发育NNW-SSE向断层。 展开更多
关键词 termit盆地 中西非裂谷系 东尼日尔 局部应力场 有限元数值模拟 力学机制
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尼日尔Termit盆地上白垩统成藏条件分析与勘探策略 被引量:8
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作者 袁圣强 毛凤军 +4 位作者 郑凤云 张光亚 刘计国 吕明胜 程小岛 《地学前缘》 EI CAS CSCD 北大核心 2018年第2期42-50,共9页
尼日尔Termit盆地纵向上主要发育白垩系和古近系两套大的成藏组合,其中上组合古近系Sokor组为主力成藏组合,下组合白垩系为潜在成藏组合。盆地整体从下到上发育了下白垩统陆相—上白垩统海相—古近系陆相沉积旋回,发育了特殊的海侵层序... 尼日尔Termit盆地纵向上主要发育白垩系和古近系两套大的成藏组合,其中上组合古近系Sokor组为主力成藏组合,下组合白垩系为潜在成藏组合。盆地整体从下到上发育了下白垩统陆相—上白垩统海相—古近系陆相沉积旋回,发育了特殊的海侵层序。随着Termit盆地古近系主力成藏组合的勘探程度越来越高,亟待开辟新的勘探领域。基于研究和勘探实践,对Termit盆地下组合(白垩系)勘探新层系进行了探索。下组合白垩系又可以细分为K1、Donga组和Yogou组上段(YS3段)3个成藏组合,通过构造建模、沉积体系研究和油气成藏条件分析,认为YS3段具有较好的成藏条件,是下步勘探的重点领域。YS3段形成于海平面高频震荡下行时期,总体为海陆过渡相,三角洲体系发育,以砂泥互层沉积为主;其中发育的泥岩为该盆地主力烃源岩且大面积成熟,生烃潜力大,同时又是非常好的局部盖层;三角洲相石英砂岩结构和成分成熟度高,可做良好储层,且与烃源岩交互发育,埋藏适中,因此YS3段具有良好的"近源"油气成藏条件。结合构造研究和钻井揭示特征进行Yogou组时期沉积体系研究,建立时间与空间演化序列特征,评价物源体系和储层发育特征,进而优选有利勘探区带。通过盆地东、西和南缘沉积期古地形的对比研究,认为Yogou组时期盆地在不同盆地边缘位置具有不同的地形和沉积体系发育特征,西部Dinga断阶带为"陡坡带"特征,隆起区通过几组深大断裂快速进入深凹区,连接隆起和深凹区的斜坡区较窄;南部Yogou斜坡区和东部Fana低凸起地区地形较缓,斜坡区域面积大,有利区带广,据此建立了"陡坡带"和"缓坡带"沉积模式。东部隆起带在晚白垩世为Termit盆地的主力物源区,西部和南部为次要物源区,因此在海侵层序后期在东部广泛发育大规模三角洲前缘砂与泥岩互层的层序,南部次之,西部规模最小。烃源岩研究认为YS3段烃源岩为陆源有机质,与物源规模有关。因此沉积体系研究认为盆地西南部和东南部"缓坡带"储层和烃源岩都更加发育,成藏条件和可勘探面积都优于盆地西部"陡坡带"。下组合白垩系Yogou组YS3段与上组合古近系Sokor组比缺乏区域盖层,上组合反向断块勘探策略不适合YS3段层系,应重点针对背斜圈闭、小断距反向断块、顺向断块和岩性圈闭进行勘探。 展开更多
关键词 尼日尔 termit盆地 油气勘探 Yogou组
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