Lithofacies, Succession, and Their Genetic Interpretation of Lacustrine Gravel Beach-Bars

Author:

Peng Biao123ORCID,Liu Siqi1,Wang Huanyuan24ORCID,Wei Yulu4,Zhang Lulu13,Ye Shenglan3,Li Jianfeng3

Affiliation:

1. Shaanxi Provincial Land Engineering Construction Group Co. Ltd. Xi’an 710000 China shaanxidijian.com

2. Shaanxi Key Laboratory of Land Consolidation Xi’an 710000 China

3. Xi’an Jiaotong University Xi’an 710000 China xjtu.edu.cn

4. School of Land Engineering Chang’an University Xi’an 710000 China chd.edu.cn

Abstract

Abstract Based on the elaborate dissection of profile sections parallel and vertical with the shoreline and the forming beach-bars, the unique sedimentary succession of gravel beach-bars, “ABC” sequence, has been found, and their lithofacies and origin have been explained. The A interval is composed of poorly sorted sand and gravel, formed in the wave asymmetric zone. The B interval is composed of well-sorted gravel, formed in the breaker zone. The C interval is composed of normally graded sand, formed in the surfing zone. In the actual gravel beach-bars, three intervals are often presented in a variety of combinations, such as “ABCABC,” “BCBCBC,” “ABABAB,” and others. These findings provide an important basis for the identification and distribution prediction of beach-bar reservoirs in the ancient continental lake basins.

Funder

Xi’an Jiaotong University

Shaanxi Land Engineering Construction Group Co., Ltd

Technology Innovation Center for Land Engineering and Human Settlements

Natural Science Basic Research Program of Shaanxi

Fundamental Research Funds for the Central Universities

Publisher

GeoScienceWorld

Subject

Geology

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