白云石-方解石氧同位素温度计在川东北地区飞仙关组白云岩成因研究中的尝试.doc
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1、白云石-方解石氧同位素温度计在川东北地区飞仙关组白云岩成因研究中的尝试胡作维1黄思静1李志明2张雪花1徐二社2刘涛1(1. 油气藏地质及开发工程国家重点实验室(成都理工大学), 成都 610059;2.中国石化石油勘探开发研究院 无锡石油地质研究所, 江苏 无锡 214151)摘要 川东北地区三叠系飞仙关组中,作为最重要储集岩的粒屑白云岩和结晶白云岩的形成机制一直都是高度关注的热点问题。在白云岩结构分类、氧同位素分析的基础上,通过白云石-方解石氧同位素温度计获得了川东北地区飞仙关组不同类型白云岩的形成温度,其中大多数计算温度集中分布在40140区间内,结晶白云岩(包括结构类似的过渡岩石类型)和
2、孔洞白云石的计算温度集中分布在相对高温区间,粒屑白云岩和微晶白云岩的计算温度集中分布在相对低温区间,与前人关于流体包裹体、白云岩形成环境等分析结果有较好的一致性。白云石-方解石氧同位素温度计的初步尝试及其获得的计算温度,可望为川东北地区飞仙关组优质白云岩储层的形成机制研究提供有价值的基础资料。关键词 氧同位素温度计;白云岩;飞仙关组;三叠系;川东北地区Preliminary application of the dolomite-calcite oxygen isotope thermometer in studying the origin of dolomite in Feixiangua
3、n Formation, Northeast Sichuan, ChinaHU Zuo-wei1, HUANG Si-jing1, LI Zhi-ming2, ZHANG Xue-hua1, XUE Er-she2, LIU Tao11.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;2.Wuxi Institute of Petroleum Geology, SINOPEC Explor
4、ation & Production Research Institute, Wuxi 214151, ChinaAbstract: The natural gas exploration and production of Triassic Feixianguan Formation in Northeast Sichuan play an important role in the Chinese marine oil & gas industry. The origin of oolitic dolomite and crystalline dolomite, which are the
5、 most important reservoirs in Triassic Feixianguan Formation, is one of the hot spot problems, and has been received special attention in recent years. Based on the textural classification and oxygen isotope analyses, the temperatures of different types of dolomite samples from Feixianguan Formation
6、 of Northeast Sichuan are calculated by the dolomite-calcite oxygen isotope thermometer. Most of the calculated temperatures range over from 40 to 140. The calculated temperatures of crystalline dolomite (including the transitional rock types with the similar texture) and dolomite cement have a rela
7、tively high temperature range and the calculated temperatures of oolitic dolomite and micrite dolomite have a relatively low temperature range. These results are consistent with the fluid-inclusion homogenization temperatures and formation environment of dolomite. The preliminary application and the
8、 obtained temperatures of the dolomite-calcite oxygen isotope thermometer will provide some valuable basic data for the studies of high-quality dolomite reservoirs in Triassic Feixianguan Formation of Northeast Sichuan.Key words: oxygen isotope thermometer; dolomite; Feixianguan Formation; Triassic;
9、 Northeast Sichuan马松岭铜矿区变火山沉积岩系形成环境研究杨钻云1,2 施泽进1钟康惠1陈波1刘珂辛1(1.油气藏地质及开发工程国家重点实验室(成都理工大学),成都 610059;2.四川省冶金地质勘查局606大队,四川 郫县611730)摘要 在搜集前人相关测试数据,对龙门山中段马松岭矿区出露广泛的变火山岩及其准同期变辉绿岩、赋矿火山沉积围岩进行补充采样和测试基础上,通过岩石地球化学研究,认为马松岭矿区变火山-沉积岩系主体为变岛弧钙碱系列,含少量变大洋岛碱性玄武岩和变正常沉积岩,形成环境为张裂岛弧;彭州式铜矿可能是在VMS型矿胚基础上经后期改造而成;与火山沉积岩系准同期的变辉
10、绿岩为岛弧拉斑系列,因受到不断成熟的过渡壳物质混杂,而主体显高铝系列特征。关键词 龙门山中段;彭州式铜矿;马松岭矿区;变火山沉积岩系;变辉绿岩;构造环境Study on the formation environment of metavolcanite-sedimentary rock series in Masongling, Longmenshan, ChinaYANG Zuan-yun1,2, SHI Ze-jin1, ZHONG Kang-hui1, CHEN Bo1, LIU Ke-xin11.State Key Laboratory of Oil and Gas Reservoi
11、r Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;2.The 606 Team of Sichuan Metallurgy Geology Exploration Bureau, Pixian 611730, ChinaAbstract: Based on the study of previous relevant test data, added sampling and testing on extensively-outcropping metavolcanite an
12、d penecontemporaneous diabase, host rocks of volcano-sedimentary in Masongling mining area of mid-segment Longmenshan Mountains, according to research of lithogeochemical, the authors think that the main body of metavolcanite-sedimentary rock in Masongling mining area is calcalkaline series of metam
13、orphic island arc, including a small quantity of alkali basalt and meta-normal sedimentary rock in metamorphic island arc, whose environment is of rifting land arc; Pengzhou type copper deposit maybe developed by subsequent reformation of previous VMS ore deposit; metadiabase which is penecontempora
14、neous with volcanic-sedimentary rocks series belongs to island arc tholeiitic series. Mixed with transition crust materials continuously, the main body is characterized by high aluminium rock series.Key words: Longmenshan Mountains; Pengzhou type copper ore; Masongling mining area; metavolcanite-sed
15、imentary rock series; metadiabase; tectonic setting黔东凯里三都断裂结构及形成演化李学刚1a杨坤光1a,1b胡祥云1c戴传固2张慧2(1.中国地质大学 a.地球科学学院; b.构造与油气资源教育部重点实验室; c.地球物理与空间信息学院,武汉 430074;2.贵州省地质调查院,贵阳 550005)摘要 通过宏观描述、地震解译、有限应变测量、显微构造分析及包裹体测温等方法对黔东凯里-三都断裂进行了研究。认为凯里-三都断裂是黔东南推覆体的前锋断裂,呈向NWW突出的弧形,总体表现为由数条断层组成的逆冲断裂带,主断裂倾向SEE,为黔南拗陷和雪峰古陆的
16、分界线。断裂带以浅层脆性变形为主,断裂带上盘向NWW推覆的水平位移达1215 km,是多条断层多期挤压、拉张和平移剪切作用叠加的结果。断裂带经历了多期演化过程,燕山期以来的演化历史主要受太平洋构造域控制,早中燕山期为主挤压逆冲阶段、晚燕山期为拉张正滑阶段、喜马拉雅期为再次挤压-定型阶段。关键词 凯里-三都断裂;地球物理;宏观结构;微观变形;均一温度;演化历史Formation and evolution of the Kaili-Sandu fault in East Guizhou, ChinaLI Xue-gang1a, YANG Kun-guang1a,1b, HU Xiang-yun1
17、c, DAI Chuan-gu2, ZHANG Hui21a.Faculty of Earth Sciences,1b.Key Laboratory of Tectonic and Petroleum Resources, Ministry of Education, 1c.Faculty of Geophysics and Geomatics,China University of Geosciences, Wuhan 430074, China;2.Guizhou Academy of Geological Surveying, Guiyang 550005, ChinaAbstract:
18、 The Kaili-Sandu fault is the forward fracture of the thrust nappe in Southeast Guizhou. It shows an arcuate thrust-belt bulging to NWW and consists of several faults. The main fault of the Kaili-Sandu fault belt dips to SEE and separates the South Guizhou depression from the Xuefengshan uplift and
19、is characterized by the brittle deformation. The horizontal displacement of the hanging wall of the Kaili-Sandu fault thrusting to NWW is about 1215 km. This is the result of numerous faults multi-stage compression, extension and strike slip shearing movements. The Kaili-Sandu fault belt has undergo
20、ne multi-tectonic movement, mainly controlled by the Pacific tectonic domain since Yanshanian. Early and middle Yanshanians are the main compression and thrusting stages, late Yanshanian is the extension and slipping stage, and Himalayan is the compression and final structure-shaping stage.Key words
21、:Kaili-Sandu fault; geophysics; macroscopic structure; microscopic deformation; homogenization temperature; evolutionary history安徽芦岭煤矿88采区瓦斯地质规律王麒翔1,2董国伟1,2崔俊飞1,2覃木广1,2 陈敏3(1.瓦斯灾害监控与应急技术国家重点实验室,重庆 400037;2.中煤科工集团重庆研究院,重庆 400037; 3.重庆地质矿产研究院,重庆 400043)摘要 根据构造、层序、瓦斯压力、瓦斯含量、瓦斯涌出量等多因素分析了安徽省宿州市芦岭煤矿88采区瓦斯
22、地质规律,并建立了运动学模型和压力梯度计算模型。芦岭煤矿区域构造上由于徐宿弧形构造和双重构造2方面因素,造成其相对于临宿矿区其他矿井的构造应力更集中,瓦斯压力较大、含量较高,突出灾害危险性严重。层序上,芦岭矿井第8煤层发育在最大海泛面时期,为层序内最厚的稳定煤层,顶底板圈闭性良好,瓦斯富集。88采区以采区中部的F14正断层为界划分为东、西2个瓦斯地质单元,分别具有不同的瓦斯压力梯度。东部瓦斯地质单元是F14断层下盘, 海拔高度较高但瓦斯压力高,而西部单元(断层上盘)海拔高度较低但瓦斯压力低,与正常瓦斯地质规律相反,初步分析与正断层F14上盘煤层顶板在拉张运动过程中被破坏有关。关键词 芦岭煤矿;
23、瓦斯地质;断层;顶板;煤与瓦斯突出Gas-geology principle of 88 mining area in the Luling coal mine, Anhui, ChinaWANG Qi-xiang 1,2, DONG Guo-wei 1,2, CUI Jun-fei1,2, QIN Mu-guang 1,2, CHEN Min31.State Key Laboratory of Gas Disaster Monitoring and Emergency Technologies, Chongqing 400037, China;2.Chongqing Research Ins
24、titute, China Coal Technology &Engineering Group Corp, Chongqing 400037, China;3.Chongqing Institute of Geology and Mineral Resources, Chongqing 400043, ChinaAbstract: According to structure geology, sequence stratigraphy, gas pressure, gas content, gas emission and other factors, this paper analyze
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