| 珠江口盆地第三纪古地理及沉积演化 |
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| 引用本文： | 赵中贤,周蒂,廖杰.珠江口盆地第三纪古地理及沉积演化[J].热带海洋学报,2009,28(6):52-60. |
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| 作者姓名： | 赵中贤 周蒂 廖杰 |
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| 作者单位： | 1. 中国科学院边缘海地质重点实验室,中国科学院南海海洋研究所,广东,广州,510301;中国科学院研究生院,北京,100039
2. 中国科学院边缘海地质重点实验室,中国科学院南海海洋研究所,广东,广州,510301 |
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| 摘 要： | 珠江口盆地第三纪以来经历了断陷、拗陷两个构造演化阶段，具有“南北分带”、“东西分块”的构造格局和先陆后海的沉积特征。本文根据前人资料进行综合整理，编制了珠江口盆地古近纪神狐组、文昌组、恩平组、珠海组地层和新近纪珠江组地层的岩相古地理图。神狐组发育有冲积扇和河湖相，主要分布在珠三坳陷南断裂的狭长地带。文昌组沉积半深湖—深湖相，恩平组水深变浅，河沼相广泛分布。珠海组岩相古地理发生了较大的变化，为海陆过渡相沉积。随后海平面振荡上升，珠江口盆地处于陆架—陆坡环境，发育浅海—半深海沉积。对整个珠江口盆地岩相古地理图的编制为详细研究盆地内各区块的岩相古地理演变提供了区域背景，也为区域构造演化和油气地质条件的研究提供了基础依据。
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| 关 键 词： | 珠江口盆地 第三纪 岩相古地理 沉积演化 |
| 收稿时间： | 2008-10-6 |
| 修稿时间： | 2009-2-18 |
Tertiary Paleogeography and Depositional Evolution in the Pearl River Mouth Basin of the Northern South China Sea |
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| ZHAO Zhong-xian,ZHOU Di,LIAO Jie.Tertiary Paleogeography and Depositional Evolution in the Pearl River Mouth Basin of the Northern South China Sea[J].Journal of Tropical Oceanography,2009,28(6):52-60. |
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| Authors: | ZHAO Zhong-xian ZHOU Di LIAO Jie |
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| Abstract: | Rifting, post-rift subsidence took place in the Pearl River Mouth Basin (PRMB) of the northern South China Sea during the Tertiary period. The structure of the basin is characterized by NEE-running belts of depressions and uplifts blocked by NW-striking faults. The authors compiled lithofacies and paleogeographic maps for the Tertiary Shenhu, Wenchang, Enping, Zhuhai, and Zhujiang formations of the entire PRMB based on summary of individual studies in the published literature. The Shenhu Formation consists of alluvial fans and lacustrine sediments distributed along the southern fault of the Zhu III depression. The Wenchang Formation is characterized by intermediate and deep lacustrine facies. Fluvial facies are widely developed in the Enping Formation. The Nanhai Movement in late Early Oligocene signified the transition from rifting stage to post-rifting stage, also a transition from continental to marine sedimentation in the PRMB. The Zhuhai Formation consists of transitional sediments, and the Zhujiang and later formations are of marine facies. The compiled lithofacies and paleogeographic maps for the PRMB provide a useful regional background for comprehensive studies of lithofacies and paleogeography of individual districts in the basin. |
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| Keywords: | Pearl River Mouth Basin Tertiary lithofacies palogeography sedimentation |
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