西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (1): 1-11.DOI: 10.11885/j.issn.1674-5086.2015.09.04.03

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The Surface Features of the Quartz Sand Grains in Zhuhai Formation of Baiyun Deep-water Area, the Pearl River Mouth Basin

XING Zuochang1, LIN Changsong2, QIN Chenggang3, ZHANG Zhongtao3, WANG Siqi1   

  1. 1. School of Energy Resources, China University of Geosciences(Beijing), Haidian, Beijing 100083, China;
    2. School of Ocean Sciences, China University of Geosciences(Beijing), Haidian, Beijing 100083, China;
    3. Research Institute of Shenzhen Branch, CNOOC, Guangzhou, Guangdong 510240, China
  • Received:2015-09-04 Online:2017-02-01 Published:2017-02-01

Abstract: Due to the hardness and chemical stability of quartz grains, their surfaces contain numerous microtextures that are formed during transport and deposition by various geological forces. These microtextures can provide evidence for interpreting sedimentary environments and transport mechanisms. The causes of sedimentary quartz grain surface microtextures in the Zhuhai Formation, Baiyun deep-water area, can be divided into three categories, mechanical, chemical, and mechanicalchemical, with 26 subclasses. The most dominant characteristics are subangular shape, V-shaped percussion cracks, straight/curved grooves and scratches, upturned plates, and abrasion fatigue. Sedimentary deposition in the late-Zhuhai Formation in the study area is characterized by medium transport distance, high-energy hydrodynamics(upper flow regime), and saltation. Although the specific sedimentary environment significance of the microfeatures remains to be addressed, this study provides new ideas and evidence for understanding sedimentary processes.

Key words: Baiyun deep-water area, Zhuhai Formation, single quartz grain, microtexture, SEM

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