新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (2): 185-188.

• 油气勘探 • 上一篇    下一篇

塔里木盆地志留系划分、对比及其地质意义

王成林1,2, 张惠良3, 李玉文3, 沈扬3   

  1. 1.中国石油大学, 北京 102249;
    2.中国石油 石油勘探开发科学研究院 塔里木分院, 北京 100083;
    3.中国石油 石油勘探开发科学研究院 杭州地质研究所, 杭州 310023
  • 收稿日期:2006-08-11 修回日期:2006-10-13 出版日期:2007-04-01 发布日期:2020-07-31
  • 作者简介:王成林(1975-), 男, 吉林蛟河人, 在读博士研究生, 地质资源与地质工程,(Tel) 010-62098199(E-mail) clw@vip.sina.com

Stratigraphic Division, Correlation and Geologic Significance of Silurian in Tarim Basin

WANG Cheng-lin1,2, ZHANG Hui-liang3, LI Yu-wen3, SHEN Yang3   

  1. 1. China University of Petroleum, Beijing 102249, China;
    2. Tarim Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    3. Hangzhou Institute of Geology, Research Institute of Petroleum Exploration and Development, PetroChina, Hangzhou, Zhejiang 310023, China
  • Received:2006-08-11 Revised:2006-10-13 Online:2007-04-01 Published:2020-07-31

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摘要： 通过实测盆地西部柯坪地区志留系露头剖面,将志留系划分为下志留统柯坪塔格组、塔塔埃尔塔格组、中-上志留统依木干他乌组,其中柯坪塔格组可细分为柯坪塔格组下段、中段和上段,塔塔埃尔塔格组细分下段和上段;并识别出6个地层对比标志层。塔中隆起缺失柯坪塔格组下段和中段,塔北隆起英买力地区缺失柯坪塔格组下段,满加尔凹陷及塔东地区柯坪塔格组发育齐全,塔中、塔北等地区依木干他乌组保存不全。柯坪地区、塔北地区以滨岸-浅海相碎屑岩沉积为主,塔中以河口湾-潮坪沉积为主,塔东以陆相河流-辫状河三角洲粗碎屑沉积为主。综合分析认为,志留系沉积前塔中和塔北是个继承性隆起,沉积古地貌东高西低,海侵从西北向东南,地层由西北向东南超覆,后期抬升导致志留系上部地层剥蚀,志留系独特的沉积特征显示了古地貌特征、物源方向和海侵方向。

关键词: 塔里木盆地, 志留纪, 地层划分, 地层对比

Abstract: Through survey of Silurian outcrop section in Keping area in western Tarim basin, the Silurian can be divided into Kepingtag, Tataaiertag formations of Lower Silurian, Yimugantawu formation of Middle-Upper Silurian. The Kepingtag can be sub-divided into lower, middle and upper parts, while the Tataaiertag into lower and upper parts. Also, six horizon markers for strata correlation have been identified. The study shows that Tazhong (central Tarim) uplift lacks of the lower and the middle parts of Kepingtag formation, Tabei (northern Tarim) uplift lacks of the lower part in Yingmaili area; the whole Kepingtag formation is found in Manjiaer sag and Tadong (eastern Tarim) area, and Yimugantawu formation is partly found in Tazhong and Tabei areas. Keping and Tabei areas are dominated by shore-neritic facies' clastic deposits, Tazhong area by estuarine-tidal flat deposits and Tadong area by continental river-braided stream delta's coarse fragment deposits. The integrated analysis indicates that before Silurian, Tazhong and Tabei areas were inherited uplifts showing paleo-relief of the higher in east and the lower in west; the transgressive direction was from WN towards ES; the strata were overlapped from WN towards ES. The top stratum denudation of Silurian was caused by the post tectonic uplifting. The unique characteristics of Silurian deposit reveal the paleo-relief feature, source and transgressive directions in Tarim basin.

Key words: Tarim basin, Early Silurian, stratigraphic division

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