| 南羌塘盆地羌资-2井中侏罗统色哇组和布曲组沉积特征 |
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| 引用本文： | 段志明 钟成全 朱华平 程,江 李忠雄 汪正江.南羌塘盆地羌资-2井中侏罗统色哇组和布曲组沉积特征[J].中国地质,2009,36(2):355-365. |
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| 作者姓名： | 段志明 钟成全 朱华平 程 江 李忠雄 汪正江 |
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| 作者单位： | 1. 国土资源部成都地质矿产研究所,四川,成都,610082
2. 四川蜀西地质工程勘测院,四川,成都,611730 |
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| 基金项目： | 羌塘盆地石油地质资料浅钻施工与测试分析(科油[2005]09号)资助。 |
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| 摘 要： | 通过对南羌塘盆地羌资-2井石油地质浅钻的岩心录井和样品测试分析表明:中侏罗世阿林期-巴柔期,南羌塘盆地处于被动大陆边缘演化阶段,沉积了一套向上变粗变浅的三角洲相进积序列的色哇组,粒度分析概率累计曲线主要以跳跃和悬浮次总体为主,粒度C-M图反映了辫状河三角洲沉积特点,孢粉分析揭示了热带-亚热带干热气候特征:中侏罗世巴通期,盆地过渡为相对稳定的坳陷盆地发展阶段.沉积了以富含鲕粒、砂砾屑和生屑等颗粒灰岩为特征的碳酸盐台地浅滩化沉积序列的布曲组.从中侏罗世阿林期至巴通期,整个南羌塘盆地经历了一次完整的海侵-海退沉积旋回,从下至上依次出现前三角洲亚相→三角洲前缘亚相→台前缓坡亚相→开阔台地亚相→局限台地亚相的沉积序列.
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| 关 键 词： | 南羌塘盆地 羌资-2井 中侏罗统 沉积特征 粒度分析 |
Sedimentary characteristics of Middle Jurassic Sewa and Buqu Formations from Qiangzi Well-2, southern Qiangtang basin, Tibet |
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| DUAN Zhi-ming,ZHONG Cheng-quan,ZHU Hua-ping,CHENG Jiang,LI Zhong-xiong,WANG Zheng-jiang.Sedimentary characteristics of Middle Jurassic Sewa and Buqu Formations from Qiangzi Well-2, southern Qiangtang basin, Tibet[J].Chinese Geology,2009,36(2):355-365. |
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| Authors: | DUAN Zhi-ming ZHONG Cheng-quan ZHU Hua-ping CHENG Jiang LI Zhong-xiong WANG Zheng-jiang |
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| Institution: | 1. Chengdu Institute of Geology and Mineral Resources;Chengdu 610082;Sichuan;China;2. West Sichuan Institute of Engineering Geology and Reconnaissance;Chengdu 611730;China |
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| Abstract: | Based on core logging and sample analysis of Qiangzi Well-2 petroleum shallow drilling hole in southern Qiangtang basin,the authors hold that the southern Qiangtang basin was in the evolution stage of passive margins in Middle Jurassic Bajocian and Aalenian period,and formed an upward coarsening and shoaling delta facies prograding sequence of Sewa Formation. On the cumulative curve in the grain size arithmetic probability graph,characteristics of saltation mass and suspension are obvious. The C-M diagram o... |
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| Keywords: | southern Qiangtang basin Qiangzi Well-2 Middle Jurassic sedimentary characteristics grain size analysis |
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