北部湾盆地福山凹陷深湖重力流成因分类、发育机制及沉积模式

doi:10.13278/j.cnki.jjuese.20170302

吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (2): 323-345.doi: 10.13278/j.cnki.jjuese.20170302

北部湾盆地福山凹陷深湖重力流成因分类、发育机制及沉积模式

李媛^1,2, 林松¹, 林正良³, 马庆林⁴

1. 中国地震局地震研究所, 中国地震局地震大地测量重点实验室, 武汉 430071;
2. 中国地质大学(武汉)构造与油气资源教育部重点实验室, 武汉 430074;
3. 中国石化石油物探技术研究院, 南京 210014;
4. 中石油南方石油勘探开发有限责任公司, 广州 510240

收稿日期:2012-11-14 出版日期:2019-03-26 发布日期:2019-03-28
作者简介:李媛(1987-),女,工程师,博士,主要从事沉积盆地和地震构造研究,E-mail:liyuan_28@163.com
基金资助:
国家自然科学基金项目（41472084）；中国地震局社会公益研究项目（IS201626261）

Genesis Classification, Development Mechanism and Sedimentary Model of Deep-Lacustrine Gravity Flow in Fushan Sag of Beibuwan Basin

Li Yuan^1,2, Lin Song¹, Lin Zhengliang³, Ma Qinglin⁴

1. Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China;
2. Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China;
3. Petroleum Geophysical Research Institute, SINOPEC, Nanjing 210014, China;
4. Southern Petroleum Exploration and Development Co., Ltd., PetroChina, Guangzhou 510240, China

Received:2012-11-14 Online:2019-03-26 Published:2019-03-28
Supported by:
Supported by National Natural Science Foundation of China (41472084) and Social Public Welfare Research Project of China Seismological Bureau (IS201626261)

摘要/Abstract

摘要： 福山凹陷为北部湾盆地南缘海南隆起斜坡上的一个新生代断陷湖盆。本文充分利用岩心、测井以及覆盖整个研究区的高分辨率三维地震资料，以层序地层学、沉积学等多种理论为指导，结合沉积岩石学、地震沉积学等相关技术，于古近系流沙港组SQEls₂EST+LST时期，在福山凹陷识别出4种深湖重力流沉积岩相类型；通过岩相组合及其转换特征、砂分散体系、地震相分析，对该时期沉积体系展布特征进行细致剖析，进而建立福山凹陷深湖重力流发育机制和沉积模式：西部地区发育以浊流为主、具有典型浊积水道的湖底扇沉积；而东部地区则以砂质碎屑流沉积形成的远端孤立朵体为主。

关键词: 深湖重力流, 砂质碎屑流, 浊流, 湖底扇沉积, 福山凹陷

Abstract: Fushan sag is a Cenozoic faulted lake basin on the slope of Hainan uplift in the southern margin of Beibuwan basin. This paper makes full use of the high-resolution three-dimensional seismic data covering the whole study area. Guided by various theories such as sequence stratigraphy and sedimentology, combined with relevant technologies such as sedimentary petrology and seismic sedimentology,a comprehensive study of the whole study area is carried out. In the period of SQEls₂EST+LST of Liushagang Formation in Paleogene, four types of deep-lacustrine gravity flow sedimentary lithofacies were identified in Fushan sag. Through lithofacies assemblage and its transformation characteristics, sand dispersion system and seismic facies analysis, the distribution characteristics of sedimentary system were carefully analyzed, and then the sedimentary model of deep-lacustrine gravity flow in Fushan sag was established. The lake floor fan deposits with typical turbidite channel developed mainly in the western eastern regions. In this area, the distal solitary bodies formed by sandy clastic deposits are dominant. This study not only has direct significance for the study of sedimentary system in Fushan sag, but also provides theoretical support for many continental fault basins with the same background in Southern China.

Key words: deep-lacustrine gravity flow, sandy clastics, turbidite, sub-lacustrine fan, Fushan sag

中图分类号:

P586

李媛, 林松, 林正良, 马庆林. 北部湾盆地福山凹陷深湖重力流成因分类、发育机制及沉积模式[J]. 吉林大学学报(地球科学版), 2019, 49(2): 323-345.

Li Yuan, Lin Song, Lin Zhengliang, Ma Qinglin. Genesis Classification, Development Mechanism and Sedimentary Model of Deep-Lacustrine Gravity Flow in Fushan Sag of Beibuwan Basin[J]. Journal of Jilin University(Earth Science Edition), 2019, 49(2): 323-345.

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北部湾盆地福山凹陷深湖重力流成因分类、发育机制及沉积模式

Genesis Classification, Development Mechanism and Sedimentary Model of Deep-Lacustrine Gravity Flow in Fushan Sag of Beibuwan Basin

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