检索结果-南通市图书馆

Features and origins of massive dolomite of lower ordovician Penglaiba Formation in the northwest Tarim Basin:Evidence from petrography and geochemistry

引用

Petroleum Science 2021年第5期18卷 1323-1341页

作者： Zhan-Feng Qiao Shao-Nan Zhang An-Jiang Shen Guan-Ming Shao Min She Peng Cao Xiao-Wei Sun Jie Zhang Rui-Xin Guo Xiu-Cheng Tan State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduSichuan 610500China PetroChina Hangzhou Research Institute of Geology HangzhouZhejiang 310023China Key Laboratory of Carbonate Reservoir China National Petroleum CorporationHangzhouZhejiang 310023China

An integrated petrographical and geochemical study of the massive dolomite of the lower ordovician Penglaiba Formation of the Tarim Basin,outcropping at Yonganba recognized three dolomite types:very finely to finely crystalline nonplanar-a to planar-s dolomite(D1);medium crystalline planar-s to planar-e dolomite(D2);and coarse crystalline nonplanar-a dolomite(D3).All have been affected by burial.D1 and D2 dolomites developed initially before or during shallow burial and later recrystallized,whereas D3 dolomite replaced the initial limestone entirely during *** three dolomites have similar geochemical *** D2 dolomite tends to have more inter-crystalline pores(inherited from primary pores)and higher porosity due to its outstanding compaction resistance during shallow burial;whereas D3 dolomite does not retain appreciable primary pores due to strong cementation and pressure dissolution before *** study provides a useful model for understanding the origin and porosity development of burial dolomite,in particular Paleozoic dolomite.

关键词： Burial dolomite Dolomitization Massive dolomite lower ordovician Penglaiba Formation Tarim Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Petrography and origin of the lower ordovician microbial carbonates in the Songzi Area of Hubei Province,middle Yangtze region,China

引用

Petroleum Science 2019年第5期16卷 956-971页

作者： Chuan-Tao Xiao Guo-Qi Wei Zhen-Yu Song Yun-Peng Xiao Wei Yang Man Dong Yun-Fei Huang Da Gao Geosciences School of Yangtze University Wuhan 430100HubeiChina Research Institute of Petroleum Exploration and Development PetroChinaLangfang 065007HebeiChina

This study is the first systematic assessment of the lower ordovician microbial carbonates in Songzi,Hubei Province,*** paper divides the microbial carbonates into two types according to growth patterns,namely nongranular and *** nongranular types include stromatolites,thrombolites,dendrolites,leiolites and laminites;the granular types are mainly oncolites and may include a small amount of microbiogenic *** to their geometric features,the stromatolites can be divided into four types:stratiform,wavy,columnar and ***,dipyramidal columnar stromatolites are identified for the first time and represent a new type of columnar *** thrombolites are divided into three types:speckled,reticulated and *** grazing gastropod Ecculiomphalus and traces of bioturbation are observed in the speckled and reticulated *** paper considers these two kinds of thrombolites to represent bioturbated *** findings not only fill gaps in the field of domestic ordovician bioturbated thrombolites but also provide new information for the study of *** on the analysis of the sedimentary characteristics of microbialites,the depositional environments of the various types of microbialites are described,and the distribution patterns of their depositional environments are *** relationship between the development of microbialites and the evolution and radiation of metazoans during the Early to Middle ordovician is *** with the correspondence between the stepwise and rapid radiation of metazoans and the abrupt reduction in the number of microbialites between the late Early ordovician and the early Middle ordovician,fossils of benthonic grazing gastropods(Ecculiomphalus)were found in the stromatolites and thrombolite of the study *** is believed that the gradual reduction in microbialites was related to the rapid increase in the abundance of *** not only graze

关键词： Microbial carbonate Stromatolites Thrombolites Oncolite lower ordovician Songzi Area

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characteristics and genesis of shoal facies reservoir of the lower ordovician Tongzi Formation in southeastern Sichuan Basin,China

引用

Petroleum 2024年第3期10卷 427-439页

作者： Ruiqing Tao Hao Tang Wei Yan Yading Li Qianwen Mo Ling Li Li Zhou Tao Ma Jinbiao An Guoliang Xiao Xiucheng Tan Southwest Petroleum University Division of Key Laboratory of Carbonate ReservoirsCNPCChengdu610500China Research Institute of Exploration and Development PetroChina Southwest Oil and Gas Field CompanyChengdu610051China Exploration Division PetroChina Southwest Oil and Gas Field CompanyChengdu610051China College of Geosciences China University of Petroleum(Beijing)Beijing102200China Chuanzhong Oil and Gas Geological Research Institute PetroChina Southwest Oil and Gas Field CompanySuining629000China

The lower ordovician Tongzi Formation containing abundant shoal sediments is the most promising stratum for the petroleum exploration in the Sichuan ***,the current studies mainly focus on the central part of the Basin,the systematic analysis of the southeastern part with well-developed shoal facies is *** paper aims to clarify the characteristics and genesis of the Tongzi Formation reservoir in Southeastern Sichuan Basin,following an analysis of sedimentary facies within the sequence stratigraphic *** research shows that the main types of reservoir rocks are oolitic,intraclastic and bioclastic *** the reservoir spaces consist mainly of intergranular(dissolved)pores,intercrystalline(dissolved)pores,intragranular dissolved pores and *** them,intergranular pores account for the highest proportion,which is followed by intragranular dissolved *** addition,most throats are necking and flaky which mainly connect intergranular and intercrystalline pores,*** diagenetic sequence shows that penecontemporaneous karst well improved the porosity of the reservoir in the early-stage although the cementation and compaction reduced parts of *** reservoir formation is associated with the tectonic-depositional settings,diageneses and terrigenous *** and submerged uplifts,forming in the early ordovician amalgamation between Yangtze and Cathaysia blocks,accumulated shoal sediments as the material basis for the reservoir *** karst forming intragranular dissolved pores and the dolomitization aiding grainstones to resist the pressure solution are the key to increasing porosity and preserving *** absence of terrigenous contamination prevented intergranular pores from being strongly cemented,which resulted in the reservoir difference between the central and southeastern Sichuan *** study can be used as a reference for the further exploration of ordovician

关键词： Reservoir characteristics Reservoir genesis Tongzi formation lower ordovician Southeastern Sichuan Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydrothermal alteration of dolostones in the lower ordovician,Tarim Basin,NW China:Multiple constraints from petrology,isotope geochemistry and fluid inclusion microthermometry

Hydrothermal alteration of dolostones in the Lower Ordovicia...

引用

中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： Shaofeng Dong Daizhao Chen Hairuo Qing Xiqiang Zhou Dan Wang Zenghui Guo Maosheng Jiang Yixiong Qian Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences Department of Geology University of ReginaReginaSKCanada S4S0A2 Research Institute of China National Offshore Oil Corporation

Massive dolostones pervasively occur in the lower Paleozoic strata in Tarim Basin,NW *** study focuses on the hydrothermally-altered dolostones in the lower ordovician at Sancha,Bachu County where the hydrothermally-altered dolostones,marbles and diabase intrusions co-occur within a largescale, NW trending strike-slip fault *** this zone,the intrusive diabases mostly occur along the master border faults to the east and west,*** limestones that got in contact with the intrusions commonly were marbleized and the antecedent dolostones were subject to intense hydrothermal alteration,particularly along fractured *** on field investigations and petrographic examinations on the hydrothermally-altered dolostones,five distinctive fabrics of matrix and cement dolomites are *** episodes of vein-filling calcites postdate the hydrothermallyprecipitated saddle *** isotopic geochemistry(C,O and Sr) and fluid inclusion micro thermometry suggest that dolomite recrystallization and precipitation were associated with the hydrothermal activity induced by fracturing/faulting and intrusive *** SIMS U-Pb isotopic dating of zircon grains from the diabases yields an age of 290.5±2.9 Ma in the Early Permian, which reconciles the relative timing revealed by the paragenetic *** magmatic emplacement was thus linked to the large igneous province(LIP) of Early Permian in Tarim *** this case,the widespread magmatic activities could have caused the thermal anomaly and fracturing in the strata that were penetrated by the intrusions,enhancing the thermal diffusion and hydrothermal fluid migration (although minor volumes of thermal fluids from the basic magmas) through the fracture/fault systems, thereby resulting in contact metamorphism(or marbleization),recrystallization of matrix dolomites and dolomite precipitation commonly in primary dolostone *** study provides a useful analogue to unders

关键词： Tarim Basin lower ordovician Tectono-magmatism Isotope geochemistry U-Pb isotope dating Hydrothermally-altered dolostone

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：