川西前陆盆地蓬莱镇组层序、岩相古地理特征及演化  

SEQUENCE-BASED LITHOFACIES AND PALEOGEOGRAPHIC CHARACTERISTICS AND EVOLUTION OF THE PENGLAIZHEN FORMATION IN WEST SICHUAN FORELAND BAISN

作　　者：朱志军[1,2] 陈洪德[1] 林良彪[1] 胡晓强[1] 徐胜林[1] 张戈[3] 

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]东华理工大学,江西抚州344000 [3]中原油田分公司采油一厂,河南濮阳457172

出　　处：《地层学杂志》2009年第3期318-325,共8页Journal of Stratigraphy

基　　金：中国石油化工股份有限公司"十五"重点科技攻关项目(P03044)

摘　　要：在川西前陆盆地蓬莱镇组层序特征研究基础上,将川西前陆盆地蓬莱镇组划分为5个沉积层序,每个沉积层序都由进积和退积体系域组成。以体系域为编图单元,采用体系域压缩法,编制了川西前陆盆地上侏罗统蓬莱镇组9张层序岩相古地理图。编图表明,川西前陆盆地蓬莱镇期古地理演化总体上显示盆扩/盆缩的特点,并具有明显的继承性、不均一性、阶段性和同步性。与传统的岩相古地理图相比,层序岩相古地理图具有动态、精确、等时、成因连续和勘探实用等优点。Based on sedimentary sequences, the Penglaizhen Formation in west Sichuan Foreland Basin is divided into five sedimentary sequences, each sequence consisting of a prograding and a retrograding system domain. Nine sequence based lithofacies and paleogeographic maps of Penglaizhen Formation in the western Sichuan Foreland Basin were recognized and used as mapping units. The results show that the paleogeographic evolution of the Penglaizhen Formation included multiple basin expansion and reduction phapses, earch showing evidence of inheritance, heterogeneity, and synchronism. Compared with traditional lithofacies and paleogeography maps sequence-based lithofacies and paleogeography maps are based on genetic successions and have distinct advantages of showing basin dynamics, facilitatingaccurate stratigraphic correlation, and aiding petroleum exploration.

关 键 词：层序地层 岩相古地理图 进积体系域 退积体系域 蓬莱镇组 侏罗系 四川 

分 类 号：P534.52[天文地球—古生物学与地层学]