Title

LATE DEVONIAN SEDIMENTARY EVOLUTION IN THE TARIM BASIN AND ITS MARGINS

作者

许杰何治亮郭建华刘辰生郭原草苏调红

Authors

Xu Jie He Zhiliang Guo Jianhua Liu Chensheng Guo Yuancao Su Diaohong

单位

中南大学地学与环境工程学院, 长沙 410083 2. 中国石油化工股份有限公司石油勘探开发研究院, 北京 100083

Organization

School of Geosciences and Environment Engineering, Central South University, Changsha, Hunan 410083, China 2. Petroleum Exploration and Development Institute, SINOPEC, Beijing 100083, China

摘要

以塔里木盆地上泥盆统东河塘组为研究对象,通过野外剖面观测、钻井岩心观察、测井曲线解释,认为东河塘组是一个具有完整海侵至海退旋回的标准I型层序,相当于3级海平面旋回的沉积地层.东河塘组由低位体系域(LST)、海侵体系域(TST)与高位体系域(HST)组成.低位体系域仅发育局部的河流沉积体系;海侵体系域主要为受潮汐控制的滨岸沉积体系,由一系列向上变浅和变细的准层序叠置成退积的准层序组;高位体系域主要发育以波浪作用为主的浪控滨岸沉积体系,由一系列向上变浅和变粗的准层序叠置成进积的准层序组.此外在盆地周缘发育冲积扇、冲积平原及扇三角洲沉积体系.

Abstract

Based on a lot of outcrops investigation,cores observation and well logs analysis,the Donghetang Formation is divided into the standard typeⅠsequence with a complete transgressive-regressive cycle.It corresponds to sedimentary strata of Ⅲ-grade sea-level cycles.It is composed of lowstand system tract(LST),transgressive system tract(TST) and highstand system tract(HST).The lowstand system tract is subaerial fluvial deposit system with limited distribution.The transgressive system tract is mainly composed of shore deposit controlled by tide.A series of shallowing and fining upward parasequences constitute the spanking parasequence group.The highstand system tract is mainly composed of wave-controlled shore deposit.A series of shallowing and thickening upward parasequences constitute the retrograding parasequence group.Additionally,there are alluvial fan,alluvial plain and fan delta deposition system in the basin edge.

关键词：

层序地层; 沉积体系; 潮控滨岸; 浪控滨岸; 沉积演化; 东河砂岩; 塔里木盆地;

Keywords:

sequence stratigraphy; deposition system; tide-controlled shore; wave-controlled shor; sedimentary evolution; Donghetang Formation; the Tarim Basin;

基金项目

中国石化石油勘探开发研究院项目(G8804-07ZS-0012)

DOI

https://doi.org/10.11781/sysydz200806568

塔里木盆地及周缘晚泥盆世沉积演化