珠江口盆地东部中新统珠江组碳酸盐岩沉积微相研究  

RESEARCH ON CARBONATE MICROFACIES IN MIOCENE ZHUJIANG FORMATION IN EAST PEARL RIVER MOUTH BASIN

作　　者：冯琳[1,2] 邓敏[1,2] 卫哲 曾驿 周小康 

机构地区：[1]成都理工大学沉积地质研究院,成都610059 [2]油气藏地质及开发工程国家重点实验室成都理工大学,成都610059 [3]中海石油(中国)有限公司深圳分公司研究院,广州510240

出　　处：《地质力学学报》2014年第1期36-47,共12页Journal of Geomechanics

基　　金：国家科技重大专项子课题"珠江口盆地碳酸盐岩识别与储层评价"(Z2008SLSZ-052)

摘　　要：基于对珠江口盆地东部新近系下中新统珠江组碳酸盐岩1483块常规及铸体薄片显微特征的观察、描述以及古生物特征和岩石学特征的研究,依据碳酸盐岩颗粒组分和结构构造等特点,将珠江组碳酸盐岩划分为8个主要微相类型,并根据灰岩颗粒类型及相对含量的多少,将其进一步细分为22个次一级的微相类型。根据这些微相类型在纵向上的组合特征与环境意义,可在珠江组碳酸盐岩中识别出碳酸盐岩缓坡、局限台地、开阔台地、台地边缘滩、台地边缘礁、台地前斜坡等6个沉积相带。这些沉积相的纵向演化规律揭示了东沙隆起在早中新世海平面上升过程中经历了由碳酸盐岩缓坡到台地的沉积演化历程。Based on the microscopic observation and description of Paleontological characteristicsand lithological features about the 1483 carbonate conventional or the casting thin sections, whichcome from the Miocene Zhujiang Formation in East Pearl River Mouth Basin, judging by our study oftheir particles, textures and structures, the carbonate rock of Zhujiang Formation can be divided into main microfacies types, and according to their grain types and relative amount, these mainmicrofacies can further be divided into 22 primary microfacies types. On the basis of the longitudinalcombination features and environmental significances of these microfacies types, the carbonate rockof Zhujiang Formation can be divided into 6 sedimentary facies： carbonate ramp, restricted flatform,open platform, platform-margin shoal, platform margin reef and fore-platform slope. The verticalevolution of sedimentary facies reveals that, Dongsha uplift experienced the evolution from carbonateramp to carbonate platform in the process of sea level rise in the early-Miocene.

关 键 词：珠江口盆地东部 珠江组 碳酸盐岩 沉积相 沉积微相 

分 类 号：P578.6[天文地球—矿物学]