塔里木盆地顺托果勒地区三叠系划分与对比
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
塔里木盆地顺托果勒地区下三叠统柯吐尔组(上、下段)、中三叠统阿克库勒组(上、下段)和上三叠统哈拉哈塘组,岩性、电性特征明显,柯吐尔组下段上部的"纯泥岩段"及哈拉哈塘组上部的"大泥巴"为区域对比标志层。在3个组中均获丰富的孢粉化石,建立了6个化石组合,详细讨论了孢粉组合特征与时空分布。确定该区下三叠统与中三叠统、中三叠统与上三叠统之间均存在地层缺失,上三叠统顶部遭受严重剥蚀,缺失1~2个孢粉组合;三叠系可划分为3个二级地震层序,分别对应于3个统;钻井层序地层可划分为3个二级层序、5个三级层序。
The Triassic in Shuntuoguole area of Tarim basin is composed of lower Ketuer formation,middle Akekule formation and upper Halahatang formation,and characterized by individual electric property and lithology,of which the pure mudstone member of Ketuer formation and the mud-siltstone member of Halahatang formation are marker beds for regional correlation,and six abundant sporopollen assemblages are built up.This paper discusses in detail the characteristics and time-space distribution of these assemblages,and verifies that there exist stratigraphic breaks between Lower and Middle Triassic strata or Middle and Upper ones,and in the top of the Upper Triassic serious denudation was undergone,and one or two sporopollen assemblages were missing.Moreover,the Triassic can be divided into three two-order seismic sequences which correspond to above three series of Triassic,and three two-order and/or five three-order drilling sequences.
引文
[1]贾承造,张师本,吴绍祖,等.塔里木盆地及周边地层[M].北京:科学出版社,2004.
    [2]张师本,黄智斌,朱怀诚.塔里木盆地覆盖区显生宙地层[M].北京:石油工业出版社,2004.
    [3]王超,黄智斌,谭泽金.塔里木盆地北部坳陷阿瓦提凹陷三叠系划分对比[J].新疆地质,2008,26(2):133-136.
    [4]刘兆生.塔里木盆地北缘三叠纪孢粉组合[J].古生物学报,1999,38(4):474-504.
    [5]刘兆生.塔里木盆地北缘晚三叠世孢粉组合及三叠系-侏罗系界线[J].沉积学报,1999,23(2):96-106.
    [6]朱怀诚.塔里木盆地三叠纪孢粉区系性质及塔里木地块演化控讨[J].微体古生物学报,1997,14(3):315-320.
    [7]刘格升,魏玲.塔里木盆地于奇地区三叠纪孢粉组合[J].华南地质与矿产,2007,23(4):56-63.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心