南祁连盆地阳康地区二叠系—三叠系沉积特征

姚海峰; 王佳; 谭先锋; 陈磊; 杨成; 肖龙; 刘世明; 蒋聪

doi:10.11781/sysydz201905699

南祁连盆地阳康地区二叠系—三叠系沉积特征

doi: 10.11781/sysydz201905699

姚海峰¹,
王佳^2, ,,
谭先锋²,
陈磊¹,
杨成¹,
肖龙¹,
刘世明¹,
蒋聪²

1. 青海煤炭地质勘查院, 西宁 810001;
2. 重庆科技学院, 重庆 401331

基金项目:

青海省地勘基金项目（2017042007ky007）和重庆市基础研究与前沿探索项目（cstc2018jcyjAX0523）联合资助。

详细信息

作者简介:
姚海峰(1979-),男,工程师,从事煤炭、煤层气、页岩气等研究。E-mail:16075689@qq.com。

通讯作者:
王佳(1987-),男,博士研究生,实验师,从事页岩气非常规地质研究。E-mail:peter-w1987@qq.com。

中图分类号: TE121.3
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出版历程
- 收稿日期: 2019-07-09
- 修回日期: 2019-09-05
- 刊出日期: 2019-09-28

Sedimentary characteristics of Permian-Triassic in Yangkang area, South Qilian Basin

1. Qinghai Bureau of Coal Geology, Xining, Qinghai 810001, China;
2. School of Petroleum Engineering, Chongqing University of Science & Technology, Chongqing 401331, China

摘要

摘要: 采用野外地质剖面实测与岩石薄片鉴定等方法，综合运用地层学、沉积岩石学及含油气盆地分析等理论，对南祁连盆地阳康隆起及周缘地区二叠系—三叠系岩石组合类型、沉积相演化特征进行了研究。研究区主要由阳康隆起、哈拉湖坳陷、下日哈坳陷3个构造单元构成，中二叠统—上三叠统地层发育完整，岩性多变，沉积相包含了碳酸盐岩台地相、浅海陆棚相、滨岸相、三角洲相、河流相及湖泊相，具有2个明显的沉积旋回，对应2次大规模的海进和海退沉积。研究区构造演化是决定其沉积演化的关键因素，自加里东运动以来，阳康隆起就一直以古隆起形式存在，控制着整个二叠纪—三叠纪沉积古地理环境，阳康隆起自晚志留世之后再未接受沉积，仅在哈拉湖坳陷和下日哈坳陷沉积了二叠系—三叠系。
- 沉积演化 /
- 沉积相 /
- 油气地质 /
- 二叠系 /
- 三叠系 /
- 阳康地区 /
- 南祁连盆地
Abstract: The field geological profile measurement and the thin section identification of rocks were used, combined with stratigraphy, sedimentary petrology and petroliferous basin analyses, to study the rock assemblage types and sedimentary facies evolution of the Permian-Triassic in the Yangkang Uplift and its surrounding areas, the South Qilian Basin. The study area is mainly composed of three tectonic units:the Yangkang Uplift, the Halahu Depression and the Xiariha Depression. The Middle Permian to Upper Triassic strata were well developed and lithologically variable. The sediments include carbonate platform, shallow shelf, littoral, delta, fluvial and lacustrine facies. There are two distinct sedimentary cycles, corresponding to two large-scale transgressive and regressive deposits. The tectonic evolution of the study area is the key factor determining its sedimentary evolution. Since the Caledonian Movement, the Yangkang Uplift existed as a paleo-uplift, which controlled the whole Permian-Triassic sedimentary paleogeographic environment. The uplift has not received sediments since the Late Silurian, and only includes Permian-Triassic strata in the Halahu Depression and the Xiariha Depression.
- sedimentary evolution /
- sedimentary facies /
- oil and gas geology /
- Permian /
- Triassic /
- Yangkang area /
- Southern Qilian Basin

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