Comparison Between Two Types of Slope-Break Belts in Pearl River Mouth Basin

新疆石油地质 ›› 2018, Vol. 39 ›› Issue (zk(English) ): 95-102.

Comparison Between Two Types of Slope-Break Belts in Pearl River Mouth Basin

ZHANG Shangfeng, CAO Yuanting², ZHANG Changmin, SHI Hesheng³, WANG Yaning, YIN Yanshu, ZHU Rui

1. Yangtze University, a. School of Geosciences; b.MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources, Jingzhou, Hubei, 434023, China;
2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
3. CNOOC Limited, Beijing 100010, China

收稿日期:2018-07-23 修回日期:2018-09-02 出版日期:2019-01-01 发布日期:2021-05-19

Comparison Between Two Types of Slope-Break Belts in Pearl River Mouth Basin

ZHANG Shangfeng, CAO Yuanting², ZHANG Changmin, SHI Hesheng³, WANG Yaning, YIN Yanshu, ZHU Rui

1. Yangtze University, a. School of Geosciences; b.MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources, Jingzhou, Hubei, 434023, China;
2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
3. CNOOC Limited, Beijing 100010, China

Received:2018-07-23 Revised:2018-09-02 Online:2019-01-01 Published:2021-05-19
About author:ZHANG Shangfeng, E-mail: jpuzhangsf@163.com

摘要/Abstract

摘要： Slope-break belt is the basis of sequence stratigraphic classification and correlation, stratigraphic architectural analysis and sequence model establishment. A lot of researches have been done on different types of slope-breaks, however, most of them focused on the analysis of a single slope-break belt. The stratigraphic sequence analysis of the Pearl River Mouth Basin in the northern South China Sea shows that there are double slope-breaks since the Neogene in the basin, that is, the sedimentary slope-break belt of the continental shelf and the geomorphic slope-break belt of the shelf edge exist simultaneously, and the controls of different slope-break belts on sedimentary sequence are various. Based on the comparison between the two types of slope-break belts from the aspects of formation background, development and evolution, topography and geomorphology characteristics, and sedimentary systems, it is believed that the formation of the geomorphic slope-break belt is closely related to the tectonic action, as a result, three types of stratigraphic sequences are formed including four partitioned, three partitioned and two partitioned system tracts, respectively. The formation of sedimentary slopes is obviously controlled by paleogeomorphology, sediment supply process and unbalance unloading, and the last two types of stratigraphic sequences are dominant.

关键词: northern South China Sea, Pearl River Mouth Basin, Neogene, sequence stratigraphy, geomorphic slope-break belt, sedimentary slope-break belt

Abstract: Slope-break belt is the basis of sequence stratigraphic classification and correlation, stratigraphic architectural analysis and sequence model establishment. A lot of researches have been done on different types of slope-breaks, however, most of them focused on the analysis of a single slope-break belt. The stratigraphic sequence analysis of the Pearl River Mouth Basin in the northern South China Sea shows that there are double slope-breaks since the Neogene in the basin, that is, the sedimentary slope-break belt of the continental shelf and the geomorphic slope-break belt of the shelf edge exist simultaneously, and the controls of different slope-break belts on sedimentary sequence are various. Based on the comparison between the two types of slope-break belts from the aspects of formation background, development and evolution, topography and geomorphology characteristics, and sedimentary systems, it is believed that the formation of the geomorphic slope-break belt is closely related to the tectonic action, as a result, three types of stratigraphic sequences are formed including four partitioned, three partitioned and two partitioned system tracts, respectively. The formation of sedimentary slopes is obviously controlled by paleogeomorphology, sediment supply process and unbalance unloading, and the last two types of stratigraphic sequences are dominant.

Key words: northern South China Sea, Pearl River Mouth Basin, Neogene, sequence stratigraphy, geomorphic slope-break belt, sedimentary slope-break belt

ZHANG Shangfeng, CAO Yuanting, ZHANG Changmin, SHI Hesheng, WANG Yaning, YIN Yanshu, ZHU Rui. Comparison Between Two Types of Slope-Break Belts in Pearl River Mouth Basin[J]. 新疆石油地质, 2018, 39(zk(English) ): 95-102.

ZHANG Shangfeng, CAO Yuanting, ZHANG Changmin, SHI Hesheng, WANG Yaning, YIN Yanshu, ZHU Rui. Comparison Between Two Types of Slope-Break Belts in Pearl River Mouth Basin[J]. Xinjiang Petroleum Geology, 2018, 39(zk(English) ): 95-102.

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Comparison Between Two Types of Slope-Break Belts in Pearl River Mouth Basin

Comparison Between Two Types of Slope-Break Belts in Pearl River Mouth Basin

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