JOURNAL OF PALAEOGEOGRAPHY ›› 1999, Vol. 1 ›› Issue (3): 73-82. doi: 10.7605/gdlxb.1999.03.009

• LITHOFACIES PALAEOGEOGRAPHY • Previous Articles     Next Articles

DISCOVERY OF SUBMARINE FAN IN THE CARBONIFEROUS  IN THE YEYUNGOU AREA OF SOUTH TIANSHAN

 Wang Jiasheng  Liu Benpei   Zhang Chuanheng  Zhou Hongrui   Li Yule   

  1. China University of Geosciences, Wuhan 430074
    China University of Geosciences, Beijing 100083
    Daqing Petroleum Administration Bureau, Daqing 163001
  • Online:1999-06-01 Published:1999-06-01
  • About author:Wang Jiasheng was born in 1963, and obtained Master degree from China University of Geosciences (Wuhan) in 1992. Now he is an associate professor of Faculty of Earth Sciences in this university, and engages in the research of sedimentology, tectonics and integrated stratigraphy in orogenic belts, as well as the lecturing of physical geology courses

南天山野云沟石炭系海底扇沉积新发现

王家生  刘本培 张传恒  周洪瑞  厉玉乐   

  1. 中国地质大学，武汉430074
    中国地质大学，北京100083
     大庆石油管理局勘探公司，大庆163001
  • 作者简介:王家生，男，1963年生，1985年毕业于武汉地质学院地质学专业，1992年获中国地质大学（武汉）理学硕士学位,现为中国地质大学（武汉）地学院副教授，从事沉积地质、构造地质和造山带综合地层学研究和普通地质学教学工作。
  • 基金资助:

    新疆“305”项目969150401和SSER项目资助成果
    新疆维吾尔自治区人民政府国家“305”项目办公室.新疆北部石炭系及其含矿性研究报告，1990

Abstract:

Bouma sequences and other sedimentary structures formed by sedimentary gravity flow, such as slumpfolded layers and flute casts, are really well developed in upper parts of the Carboniferous in the Yeyungou area of South Tianshan in China. Based on analyses of sections and lithofacies of the upper parts of Carboniferous, accompanied bC-M diagram from the statistics of sand grains in the turbidites, the authors point out that the upper parts of the Carboniferous in the Yeyungou area of South Tianshan in China were formed in submarine fan. Lithofacies such as disorganized gravels (A-1), massive sandstones without dish structures (B-2), proximal turbidites (C), distal turbidites (D), slumpfolded layers (F), and shales interval siliceous rocks (G) have been recognized in the strata, which are associated with construction of inner fan, mid fan and outer fan according to Walker models of submarine fan. It is verified that there is a sedimentary environment for deep marine fan in the Carboniferous in the Yeyungou area of South Tianshan in China. Paleo current orientation shows that the sediments came from the south side, paleo continent of Tarim. The data of chemical composition of sediments indicate that the tectonic background of the turbidites is passive continental margin environment.

摘要：

南天山野云沟石炭系上部碎屑岩中存在典型的鲍玛序列浊积构造以及滑塌构造、包卷层理等重力流沉积构造。由地层剖面分析和岩相特征及粒度统计分析的CM\%图解可知，南天山野云沟石炭系上部的碎屑岩形成于海底扇环境，可划分出杂乱砾岩相（A1）、无碟状构造块状砂岩相（B2）、近基浊积岩相（C）、远基浊积岩相（D）、滑塌角砾岩相（F）、页岩夹硅质岩相（G）等岩相类型，它们组合构成了Walker海底扇模式中的扇根、扇中、扇端。因而，首次证实南天山野云沟石炭系中存在深水海底扇沉积。古流向资料计算结果表明，其物源来自南侧的古塔里木陆块，古坡向倾向北。碎屑物常量化学成分投点表明,其形成时构造背景属被动大陆边缘。