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Secular variations in carbon isotopic compositions of carbonates from Proterozoic successions in the Ming Tombs Section of the North china Platform

Secular variations in carbon isotopic compositions of carbon...

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中国科学院地质与地球物理研究所2.03学术年会

作者： Li Renwei~(a,*),chen Jenshi~a,Zang Shukun~b,chen Zhimig~a a Institute of {2. and Geophysics,chinese Academy of sciences,P.O.Box 982.,beijing 1.002..People’s Republic of china b Institute of Geomechanics,chinese Academy of geological sciences,beijing 1.0081.People’s Republic of china

Thick,Proterozoic,unmetamorphosed carbonate-dominated successions are widely distributed in the North china *** Ming Tombs Section near {1. is a well-studied stratigraphic section and has been selected for the study of secular variations in the carbon isotopic composition of marine *** ascending order,this section includes the Changzhougou,Chuanlinggou,Tuanshanzi, Dahongyu and Gaoyuzhuang formations in the Chang{2.g Group;the yangzhuang,Wumishan,Hongshuizhung,and Tieling formations in the Jixian Group;and the Jing’eryu Formation in the Qingbaikou *** the depositional ages of the Changzhougou,Chuanlinggou and Tuanshanzi formations of the Chang{2.g Group are older than 1.00 Ma,the Gaoyuzhuang,yangzhuang and Wumishan formations belong to the Mesoproterozoic Era with ages evidently greater than～1.00-1.00 Ma,and the Jing’eryu Formation of the Qingbaikou Group were deposits of the early Neoproterozoic Era.δC values vary only within a narrow range between - 1.6 and + 1.5 permil in the early Mesoproterzoic Gaoyuzhuang,yangzhuang and Wumishan *** variation inδC of carbonates from the early Neoproterozoic Jing’eryu Formation is more significant,showing values from -0.5 to +3.3 *** secular variations inδC values of carbonates from the Proterozoic successions in the Ming Tombs Section can be broadly correlated with those in the Jixian Section of the North china *** compare well with the established global isotopic curve of the Mesoproterozoic and Neoproterozoic eras.

关键词： Carbon isotopes Proterozoic North china Chemostratigraphic correlation

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深度开发油田确定性与随机建模结合的相控建模

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石油学报 2004年第5期25卷 60-64页

作者：吕晓光张永庆陈兵陈舒薇潘懋大庆油田有限责任公司勘探开发研究院黑龙江大庆163712 北京大学地质系北京100871

总结了储层建模研究的几个基本观点 ,提出了采用确定性微相建模与随机参数模拟相结合以提高整体建模精度的思路。在微相确定性建模的基础上 ,采用相控蒙特卡洛模拟预测储层参数分布 ,生成了参数分布。对低弯度分流河道砂体建模实例的研... 详细信息

总结了储层建模研究的几个基本观点 ,提出了采用确定性微相建模与随机参数模拟相结合以提高整体建模精度的思路。在微相确定性建模的基础上 ,采用相控蒙特卡洛模拟预测储层参数分布 ,生成了参数分布。对低弯度分流河道砂体建模实例的研究结果表明 ,相控条件下的参数随机模拟精细刻画了储层的非均质性。对于资料信息点足够大的处于成熟开发的油田 ,采用研究区实际统计分布函数得到的随机模拟结果更接近于地下实际的非均质构型。

关键词：油田开发储层建模地喷约束相控模型随机参数蒙特卡洛模拟非均质性储层

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东辛油田东南部油藏描述及滚动勘探目标选择

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石油学报 2004年第2期25卷 36-40页

作者：张煜陈恭洋史文东张永贵中石化胜利油田公司山东东营257094 长江大学地球科学学院湖北荆州434023 中石化勘探开发研究院北京100083

通过高分辨率层序地层划分与对比、全三维地震资料构造解释与微构造分析、测井地震约束波阻抗反演、地震资料油气预测等配套新技术的综合应用 ,重新建立了东辛油田东南部地区的油藏地质模型。在对成藏规律认识的基础上 ,提出了工区构... 详细信息

通过高分辨率层序地层划分与对比、全三维地震资料构造解释与微构造分析、测井地震约束波阻抗反演、地震资料油气预测等配套新技术的综合应用 ,重新建立了东辛油田东南部地区的油藏地质模型。在对成藏规律认识的基础上 ,提出了工区构造油藏和岩性油藏两类共 7个滚动勘探目标。前者主要为沙三中以下目的层 ;后者为微构造或斜坡背景下的岩性尖灭型圈闭。

关键词：油藏描述滚动勘探目标选择东辛油田

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Study on Mineralization Age of Xiaoban Gold Deposit, Fujian Province

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Journal of china University of Geo{1. 2002年第3期13卷 225-233页

作者： chen Bailin Institute of Geomechanics, CAGS, {1. 1.0081.Wu Ganguo Faculty of Earth sciences and Mineral Resources, china University of Geosciences, {1. 1.0083 Zhang Da Institute of Geomechanics, CAGS, {1. 1.0081.Huang Rensheng West Fujian {12. Party of FBGMRE, Sanming 365000 Wu Jianshe Fujian Bureau of {12. and Mineral Resources Exploration, Fuzhou 350003 Institute of Geomechanics CAGS Beijing 100081 Faculty of Earth sciences and Mineral Resources China University of Geosciences Beijing 100083 West Fujian geological Party of FBGMRE Sanming 365000 Fujian Bureau of geological and Mineral Resources Exploration Fuzhou 350003

The Xiaoban gold deposit is a large-size deposit recently found in middlearea of Fujian Province. It belongs to magmatic hydrothermal type occurred in Mayuan Groupmetamorphic rocks of Middle Proterozoic and is controlled by low angle fault (detachment)structures. The contents of Au in Mayuan Group metamorphic rocks, Caledonian-Indosinian deformedgranite and early Yanshanian granite are higher with Au enrichment coefficient of 2. 06-5.68, 5.1.and 6.67 than those in other geological bodies. And the higher enrichment coefficients (>2. of Ag,S, Sn and Te are similar to those of gold ore. Meanwhile, the distribution of Au in Mayuan Groupmetamorphic rocks and early Yanshanian granite with a low D-value (0.58 and 0.67) is favorable togold mineralization. REE characteristics of gold ore, ratios of (LREE/HREE), (La/Sm)_n, (Yb/Lu)_n,(La/Tb)_n and (Sm/Nd)_n are similar to Mayuan Group metamorphic rocks, only non or little normal Euabnormal of ore is dissimilar to metamorphic rocks. The δ(^(34)S) of the gold ore, with a highhomogenization, is (-4.7X1.^(-3) - (-2.7X 1.^(-3)). The study of inclusion indicates 1.0-2.9℃ ofmineralization temperature, 3. 69 %-1.. 81.% of salinities and 0. 869-0.991.g/cm^3 of densities ofmineralization fluid. Based on hydrogen and oxygen isotope (δ(^(1.)O) = 1.. 0 X 1.^(-3) -1..7 X1.^(-3), δ(D) = (-48 X 1.^(-3)) - (-62.X 1.^(-3))) and initial w(^(87)Sr)/w(^(86)Sr) =0. 71.,combining to the analysis of geological history, regional metamorphism and magamtic activity, theauthors confirm that the source for the ore fluid was mainly from magmatic, partly from metamorphicwater, and with a little influence of meteoric water. Isotopic dating made on Rb-Sr isochron age of1.2.Ma, by using alteration minerals of gold-ores from the deposit, indicates that themineralization occurs in early Yanshanian epoch. This is close to the age of 1.7 Ma of the Anchunmagmatite with a similar alteration and gold mineralization to the Xiaoban gold deposit. The age ofearly Yanshan

关键词： mineralization age early yanshanian epoch xiaoban gold deposit fujian

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碳酸盐岩地层破裂压力的测井预测研究

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天然气工业 2004年第8期24卷 32-35页

作者：夏宏泉张元泽陈平刘之的范翔宇西南石油学院石油工程学院四川石油管理局

利用测井信息准确地计算碳酸盐岩地层的破裂压力难度较大。文章在对现有的各种地层破裂压力计算模型进行分析评价之后 ,根据三向地应力模型和岩层破裂机理 ,结合碳酸盐岩地层的低孔、各向异性、非均质性和岩石力学特性及测井响应特征 ,... 详细信息

利用测井信息准确地计算碳酸盐岩地层的破裂压力难度较大。文章在对现有的各种地层破裂压力计算模型进行分析评价之后 ,根据三向地应力模型和岩层破裂机理 ,结合碳酸盐岩地层的低孔、各向异性、非均质性和岩石力学特性及测井响应特征 ,提出了一种适合于碳酸盐岩剖面的地层破裂压力的测井预测新模型 ,并重点研究了模型中各参数的提取方法。利用该模型及其解释程序对川东地区DKH构造DU4井等的碳酸盐岩井段的测井资料进行了地层破裂压力预测处理。应用表明 ,该法从测井信息中提取的碳酸盐岩地层破裂压力是可靠的 ,且精度较高、实用性强 ,可以用于指导碳酸盐岩地层钻井液密度的设计与选择合理的压裂施工压力。

关键词：碳酸盐岩地层破裂压力测井技术四川盆地

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阳信-花沟地区二氧化碳气藏成藏模式

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石油学报 2004年第1期25卷 35-39页

作者：李趁义樊太亮郑和荣中国地质大学能源系胜利油田有限公司地质科学研究院山东东营2.701. 中国石化勘探开发研究院

讨论了阳信花沟地区二氧化碳气的成因、运移、聚集及成藏模式。对研究区地球化学、深部地质背景、深断裂发育及火山岩分布等资料分析表明 ,二氧化碳主要来自无机幔源岩浆成因气体 ,地壳内低速异常体可能是气体初始积聚区 ,与之沟通... 详细信息

讨论了阳信花沟地区二氧化碳气的成因、运移、聚集及成藏模式。对研究区地球化学、深部地质背景、深断裂发育及火山岩分布等资料分析表明 ,二氧化碳主要来自无机幔源岩浆成因气体 ,地壳内低速异常体可能是气体初始积聚区 ,与之沟通的断裂输导网络是垂向运移的通道 ;沉积盆地内气体的释放和聚集具有明显的分带性 ,区内 2.剪切构造带以及 2.早第三纪裂谷—火山岩构造带是二氧化碳气体释放、聚集及成藏的最有利地带 ,二氧化碳气藏、新生代火山岩以及源幔氦同位素异常主要沿剪切构造带和裂谷火山构造带的主干断裂呈“串珠状”分布 ;不同构造带发育不同的二氧化碳气聚集模式和气藏类型 ,其中剪切构造带主要发育深层古潜山中深层背斜或断块浅层披覆构造型气藏组合 ;裂谷火山岩构造带主要发育火成岩伴生的二氧化碳气藏。

关键词：二氧化碳气藏分布特征低速异常体深断裂成藏模式阳信-花沟地区

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Druse Calcite Crystals Formed by Mesoproterozoic Paleo-Earthquake Activity in the Northern Margin of the North china Craton

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Journal of Earth Science 2024年第2期35卷 514-524页

作者： Yueshuang Du Zhiguang Zhou Guosheng Wang chen Wu Wenchao Xu School of Earth sciences and Resources China University of GeosciencesBeijing100083China Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau Researchand Center for Excellence in Tibetan Plateau Earth SciencesChinese Academy of SciencesBeijing100101China No.1.Institute of geological and Mineral Resources Survey Henan Bureau of Geo-Exploration&Mineral DevelopmentLuoyang471000China

The Meso-neoproterozoic Bayan Obo rift is located along the northern margin of the North china Craton,and was associated with the break-up of the Columbia *** rift evolution,syn-sedimentary deformation occurred due to tectonic activity and *** events are recorded in the Jianshan Formation of the Bayan Obo Group,Inner Mongolia,as soft sediment deformation structures in the central Bayan Obo *** calcite crystals and collapse breccias in the Jianshan Formation may provide information on the rift *** druse calcite crystals are idiomorphic-columnar in shape and associated with graphite,pyrite,and quartz.δ^(1.)C values of the graphite are−2.‰,indicative of biogenic deoxygenation and formation in *** druse calcite crystals are inorganic in origin and formed in water at a temperature of 55℃,based on calciteδ^(1.)C andδ^(1.)O *** calcite grew in paleo-caves containing fault breccias,with heat derived from *** such,the druse calcite crystals are important evidence for seismic *** collapse breccias(i.e.,fault breccias)and other indicators of slip show that displacement occurred from NE to SW,which is different from the paleocurrent direction in the Jianshan *** thickness of the collapse breccia is∼2.0 m,which represents the height of the fault *** strike of the fault scarp was NE-SW,based on the distribution of the collapse *** Bayan Obo and Yanliao rifts experienced rapid NW-SE extension,and developed similar deformation structures at ca.1.6 Ga related to break-up of the Columbia supercontinent.

关键词： North china Craton druse calcite crystals paleo-earthquake activity collapse breccia Bayan Obo rift Proterozoic

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Anchimetamorphism of the Neoproterozoic and the Lower Paleozoic along the Profile of Yuanguping in Western Hunan Province, china

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Acta Geologica Sinica(English Edition) 2004年第1期78卷 170-176页

作者： WANG Hejing, chen Tao, WANG Huan and ZHANG Zuqing"Orogene and Crust Evolution " Key Laboratory of the Ministry of Education of{1. School of Earth and Space {2., Peking University, beijing 1.0871 “Orogene and Crust Evolution” Key Laboratory of the Ministry of Education of china School of Earth and Space sciences Peking University Beijing 100871 *Correspondence: WANG Hejing *Correspondence: E-mail: hjwang@***

The Neoproterozoic and Lower Paleozoic along the profile of Yuanguping in western Hunan Province, china underwent anchimetamorphism. The illite crystallinity (IC) of the <2.μm fractions ranges from 0.2.-0.34°△2.fo... 详细信息

The Neoproterozoic and Lower Paleozoic along the profile of Yuanguping in western Hunan Province, china underwent anchimetamorphism. The illite crystallinity (IC) of the 2.μm fractions ranges from 0.2.-0.34°△2.for the Neoproterozoic to 0.2.-0.35°△A2. for the Lower Paleozoic (calibrated with the Kisch IC set, Kisch, 1.91.. This indicates that the metamorphic grade of the Neoproterozoic and Lower Paleozoic is the anchizone. The peak metamorphic temperature is estimated to be 2.0-2.1}℃. This result does not agree with the greenschist or subgreenschist facies of the Banxi Group, nor with the lower-greenschist facies or sedimentary cover of the Sinian to Lower Paleozoic, as most previous researchers thought. The illite (K-mica) b0 values range from 0.9074 to 0.8963 (nm) for the Neoproterozoic and the Lower Paleozoic. Based on cumulative frequency curves of the illite (K-mica) b0, the peak metamorphic pressure of the Banxi Group was derived to be of a type that is slightly higher than that of the N. New Hampshire low-intermediate pressure type. Most illites occur as the {1. polytype and some in the Neoproterozoic as a mixture of the {1.+1. types. The distributions of coherent scanning domains (CSDs) of illites along the profile, measured with the XRD method, display a lognormal model and spread out with decreasing Kubler Index of IC. It indicates that illites underwent an Ostwald ripening. The post-anchimetamorphic structural movement not only results in a series of faults but also induces the lattice strain in minerals along the faults and hence impacts the illite crystallinity and causes diagenetic samples to occur within the anchizone. Compared with the cases in eastern and central Hunan Province, the Neoproterozoic and Lower Paleozoic rocks in the west underwent a lower-temperature anchimetamorphism with a pressure lower than that in the east and higher than that in the center of Hunan Province.

关键词： illite crystallinity polytypism cell dimension lattice strain domain size anchimetamorphism,Neoproterozoic Lower Paleozoic

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深层碳酸盐岩储层酸压改造后的地质效果评价——以塔河油田缝洞型碳酸盐岩储层为例

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石油与天然气地质 2004年第6期25卷 686-691页

作者：陈志海张士诚石油大学

深层碳酸盐岩储层酸压改造的目的就是让酸压裂缝与天然缝洞系统沟通。根据酸压改造施工曲线变化模式和酸压改造后的地质效果 ,提出了 4类评价体系 ,每种体系对应一种酸压模式 ,包括未压开地层 (Ⅰ类 )、压开地层即行停止 (Ⅱ类 )、压开... 详细信息

深层碳酸盐岩储层酸压改造的目的就是让酸压裂缝与天然缝洞系统沟通。根据酸压改造施工曲线变化模式和酸压改造后的地质效果 ,提出了 4类评价体系 ,每种体系对应一种酸压模式 ,包括未压开地层 (Ⅰ类 )、压开地层即行停止 (Ⅱ类 )、压开地层未与缝洞沟通 (Ⅲ类 )及压开地层并与缝洞沟通 (Ⅳ类 )的酸压模式。利用此方法对塔河油田 2.7口井的酸压改造情况进行了分类评价 ,5 6 %的井达到了Ⅳ类酸压模式 ,既压开了裂缝又实现了与天然缝洞系统的沟通 ,油井能保持较长期的高产稳产 ;2.2.%的井达到了Ⅱ和Ⅲ类酸压模式 ;其余 2.2.%的井只达到了Ⅰ类酸压模式 ,此类油井的酸压效果有待进一步改善。

关键词：深层碳酸盐岩储层酸压改造评价方法效果评价

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Characteristics and genesis of groundwater salinization in coastal areas of the Lower Reaches of Oujiang Basin

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Journal of Groundwater Science and Engineering 2024年第2期12卷 190-204页

作者： Mei-hui Zhang Shi-yang Zhou Dan-dan Liu Ying Zhang Yu-xi Zhang Xi {1. Hui-wei Wang Bei Li Wei Kang Bing Yi Wan-peng Shi Institute of Hydrogeology and Environmental geology Chinese Academy of Geological SciencesShijiazhuang 050061China Fujian Provincial Key Laboratory of Water Cycling and Eco–geological Processes Xiamen 361021FujianChina china University of Geo{1.({2.) Beijing 100083China Changsha Center of Natural Resources Comprehensive Survey China Geological SurveyChangsha 410600China Hydrogeological Environmental geological Survey Center of{2. geological Survey Tianjin 071501China china University of Geo{1. Wuhan 430074China

The coastal areas of the lower reaches of Oujiang River Basin are rich in groundwater ***,the unsustainable exploitation and utilization of groundwater have led to significant changes in the groundwater *** the characteristics and genesis of groundwater salinization is crucial for preventing its deterioration and ensuring sustainable *** this study,a comprehensive approach combining the ion ratio method,mineral saturation index method and multivariate statistical analysis was employed to investigate the hydrochemical characteristics and main controlling factors in the study *** findings reveal that:(1.Groundwater samples in study area exhibit a neutral to slightly alkaline *** predominant chemical types of unconfined water are HCO_(3)-Ca·Na,HCO_(3)·Cl-Na·Ca and HCO_(3)·SO_(4)-Ca·Na,while confined water mainly exhibits Cl·HCO_(3)-Na and Cl-Na types.(2.Salinity coefficients indicate an increase in salinity from unconfined to confined ***,Na^(+)and Cl^(–)concentrations show an increasing trend from mountainous to coastal areas in unconfined water,while confined water displays variability in TDS,Na^(+)and Cl^(–)concentrations.(3)Groundwater salinity is mainly influenced by water-rock interactions,including the dissolution of halite and gypsum,cation exchange,and seawater intrusion ***,human activities and carbonate dissolution contribute to salinity in unconfined *** intrusion is identified as the primary factor leading to higher salinity in confined water compared to unconfined water,with increasing cation exchange and seawater interaction observed from unconfined to confined water.

关键词： Hydrochemical Multivariate statistical analysis Seawater intrusion

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