A New Growth Model of Fault Attributes in a Strike-Slip Fault System in the Tarim Basin
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Tarim Oil Company data access and research support are gratefully acknowledged. We are grateful to Prof. Young-Seog Kim for his constructive comments and the Editor Susan Turner for her English edition. The authors also thank Ma Debo, Yang Pengfei and Zheng Duoming for their help. This study has been partly supported by the National Natural Science Foundation of China (Grant No. 91955204) and Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance (Grant No. 2020CX010300). Susan Turner (Brisbase) assisted with English language.

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    Abstract:

    Fault attributes generally display a consistent power–law-scaling relationship. Based on new 3D seismic data, however, we found some exceptional fault attribute relationships of lengths (L)–throw (T) (vertical component of displacement), overlap zone length (Lo)–width (Wo) from a strike-slip fault system of the Ordovician carbonates in the Tarim Basin. The L–T relationship shows two linear segments with breakup at ~40 km in fault length. This presents an exceptional throw increase in the second stage, which is attributed to a localization of vertical displacement and deformation in overlapping zones other than the different fault scales in a mature fault zone. The Lo–Wo relationship in the overlapping zones shows multiply stepped-shape patterns, suggesting multiple fault differential growth and periodic increase in fault size. Therefore, we propose a new alternative growth model of fault attributes in strike-slip fault zones, in which the overlapping zones accumulated localized displacement and deformation in the intracratonic strike-slip fault zone.

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ZHANG Yintao, WU Guanghui, WANG Junfang, LI Guohui, WAN Xiaoguo, YANG Tianyi.2020. A New Growth Model of Fault Attributes in a Strike-Slip Fault System in the Tarim Basin[J]. Acta Geologica Sinica(),94(5):1373-1380

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History
  • Received:October 09,2018
  • Revised:November 05,2019
  • Adopted:
  • Online: October 26,2020
  • Published: