Petroleum System of the Fula Depression at the Muglad Basin in the Central African Fault Zone     

张亚敏  顾勤 《中国地质大学学报(英文版)》2011,(3)

Petroleum system theory has been used to study characteristics of the Fula depression in the Central African fault zone.In this system,deep lacustrine facies mudstone in the Abu Gabra For-mation of the Lower Cretaceous is a very good source rock,thick deltaic facies sandstone of the Abu Gabra Formation and fluvial facies sandstone of the Bentiu Formation are good reservoir beds,and the mudstone in the Upper Cretaceous Darfur Group is the regional cap rock.The oil search mode and fault block trap seal-off co...  相似文献   

ΔlgR测井源岩评价方法的改进及其在松辽盆地的应用   总被引：3，自引：0，他引：3  

霍秋立  曾花森  付丽  任志高 《吉林大学学报(地球科学版)》2011,41(2):586-591

通过引进新的测井源岩评价技术△lgR基线表达式(记为△lgR'基线),实现△lgR测井源岩分析的全自动化.测井源岩评价技术应用于松辽盆地青山口组源岩的研究表明:△lgR'基线在青山口组差异小,均值约为2.4,与青山口组时期稳定的湖相沉积环境是相符的;总有机碳质量分数(ω(TOC))与△lgR的关系系数α并非严格对应的关...  相似文献   

松辽盆地南部片钠铝石形成与碎屑长石的成因联系   总被引：1，自引：0，他引：1  

刘娜  刘立  杨会东  杨天红  于淼 《吉林大学学报(地球科学版)》2011,41(1):54-63

含片钠铝石砂岩通常以富长石类型为主(岩屑长石砂岩,长石岩屑砂岩,长石砂岩)。为揭示片钠铝石与长石之间的主要赋存关系及长石在片钠铝石形成过程中所做的贡献,通过偏光显微镜、扫描电镜及阴极发光等镜下观察方法对松辽盆地南部红岗地区含片钠铝石砂岩进行了岩石学系统研究。本区片钠铝石主要以充填孔隙及交代颗粒的形式产出,其中片钠铝石交代斜长石的现象明显多于交代钾长石,片钠铝石交代斜长石初期优先沿其双晶缝向内生长,有些甚至完全交代斜长石而呈现交代假象。整体上片钠铝石含量与长石含量呈负相关关系。长石的溶蚀溶解为片钠铝石的形成提供Na+、Al 3+,由于各类长石的热力学性质存在差异,钾长石发生溶蚀溶解的速率及程度会明显低于斜长石,因此斜长石对形成片钠铝石的离子贡献大于钾长石。  相似文献   

Northern Eurasia earth science partnership initiative (NEESPI), science plan overview     

Pavel Ya. Groisman  Sergey A. Bartalev  The NEESPI Science Plan Development Team 《Global and Planetary Change》2007,56(3-4):215

Northern Eurasia Earth System Partnership Initiative, NEESPI, was established to address the global change processes associated with and/or originated within Northern Eurasia as well as to study the major socially-important processes within the region. NEESPI began as a US–Russian initiative but has quickly broadened into a fully international program. Scientists from 11 countries participated in preparing the NEESPI Science Plan. Current version of the Science Plan was released for public review on the World Wide Web in summer 2004 and finalized in December 2004. This paper provides an Overview of the Plan and is based, mainly, on its Executive Summary. The Overview describes the Plan's science themes and key science questions, provides a justification of the urgency studying Northern Eurasia from the global change prospective, and outlines research strategy and tools to address NEESPI science questions, as well as projected deliverables of the Initiative.  相似文献   

青海区调工作发展意向     

任家琪  张雪亭 《青海国土经略》1997,(2)

本文认为,青海区调工作在今后相当长一段时间内,仍将以外业为工作主体。区调中应强化找矿意识。在交通不便、高寒缺氧、外业时间短的青藏高原,在学习应用新理论、新方法的同时,加强遥感地质工作、运动新的信息化工作手段,很有必要。  相似文献   

Characters of fluid inclusions in quartz veins in pyroclastic rock of Budate Group, Hailar Basin     

ZHANGXin-tao LIULi GAOYu-qiao SHAOHong-mei SHENGuang-zheng 《东北亚地学研究》2004,7(2):161-164

It was adopted that the fluorescence microscope, Gas-Flow Heating/Freezing System, Laser-Raman Spectroscopy, etc. are the multimedia techniques for analysing fluid inclusions of quartz veins in Budate Group, Hailar Basin. The results show that fluid inclusions in quartz veins are small ( 1～5μm) monophase, two-phase (liquid vapour) aqueous inclusions; the two-phase aqueous inclusions homogcniese to the liquid phase between 120 ～ 180℃, two dominant types for oil inclusions were determined in quartz veins: ① the primary inclusions, almostly gas, measurement by Laser-Raman Spectroscopy show that both gas phase are enriched in CH4 (94.50%～99.25% ) and C6H6 (0.75%～2.70%), under these conditions, inclusions may have come from juvenile fliud followingly the quartz veins formation. While the quartz veins exhibiting different striking luminescence has been proved by cathodoluminescence, it would be impossible to come from the deep magmas and strata. ② aqueous, liquid and two-phase (liquid vapour) oil inclusions, belong to secondary hydrocarbon inclusions. The oil inclusions of this stage represent mainly the large scale of oil accumulation, located within the quartz microfracture.  相似文献   

深基坑变形监测方案设计及数据分析研究   总被引：1，自引：0，他引：1  

黄海峰  夏园工 《江苏测绘》2013,(5):35-38

结合某深基坑监测实践,探讨了基坑安全监测点的布设,并对支撑轴力和地下水位监测数据进行了深入分析,研究表明,混凝土持续的体积收缩以及在荷载下混凝土发生徐变被认为是影响轴力异常的最主要因素.对基坑工程监测实践有一定的借鉴意义.  相似文献   

不同气候变化情景下亚洲北山羊（Capra sibirica）的响应（英文）     

Eric Ariel L.SALAS  Raul VALDEZ  Stefan MICHEL  Kenneth G.BOYKIN 《资源与生态学报(英文版)》2020,11(1):27-37

目前很少见到关于气候变化影响亚洲北山羊物种栖息地的研究。通过调查气候变化对塔吉克斯坦东部亚洲北山羊(Capra sibirica)分布的影响,并采用生态位建模比较了亚洲北山羊的适宜栖息地的当前与未来分布情况。预计到2070年,现有适宜栖息地的18%(2689 km^2)将变得不适宜亚洲北山羊的生存,损失的区域主要位于研究区域的东南部和西北部地区。新的适宜栖息地可能会扩展到当前亚洲北山羊范围之外:到2070年将扩展30%(4595 km^2)的范围,这些区域与亚洲北山羊现有的分布有很强的相关性。东南部的损失与该地区当前大多数的亚洲北山羊栖息地重叠,主要出现在比研究区域海拔低得多的区域(3500–4000 m)。当同时考虑损失和收益时,亚洲北山羊可能会净扩展到新的适宜栖息地。到2070年,亚洲北山羊的平均栖息地增加量约为30%(1379 km^2),表明适宜栖息地已向北部低温栖息地转移。研究结果有助于规划气候变化情景下塔吉克斯坦东部山区对生物多样性保护的潜在影响。应该特别注意东南地区的高地山羊种群,那里的栖息地可能由于气候对山区生态系统的影响而变得不适合该物种继续生存。  相似文献   

Formation and evolution of petroliferous basins in African continent and their hydrocarbon distribution     

SUN Haitao  ZHONG Dakang  ZHANG Simeng  WANG Xingming.State Key Lab of Petroleum Resource  Prospecting  Faculty of Natural Resource  Information Technology  China University of Petroleum  Beijing  China.Exploration  Development Research Institute of Dagang Oilfield Company  PetroChina  Tianjin    China 《东北亚地学研究》2010,(1)

There are eighty sedimentary basins in five different types in African continent,i.e.craton sag basin,foreland basin,intermountain basin,passive margin basin and rift basin,which underwent the stress environment of stable depression-compression-extension.The first three types of basins had been intensely influenced by Hercynian and Alpine tectonic movement,while the later two types of basins always exist in a stable extension environment.Different basin evolution caused the obviously hydrocarbon distributio...  相似文献   

A comparative study of boron isotopes and trace elements of the marine foraminifers during the last glacial maximum and Holocene     

NI YunYan  Research Institute of Petroleum Exploration  Development  PetroChina  Beijing  China  Bristol Isotope Group 《中国科学:地球科学(英文版)》2010,(1)

Boron isotopic compositions in marine planktonic foraminifers can record changes in seawater pH and hence provide a new tool to reconstruct the changes of paleo-atmospheric PCO2.Here a comparative study was done on boron isotopes and trace element abundances of planktonic foraminifers,Globigerinoides sacculifer and Globigerinoides ruber from three tropical ODP sites,Site 806B,Site 664C and Site 999A.It is demonstrated here that G.ruber is a better species to be used for downcore boron isotope analyses on gl...  相似文献