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Study on System of Faults in the Gulf of Mexico and Adjacent Region based on Gravity Data
投稿时间:2020-05-22  修订日期:2020-11-07  点此下载全文
引用本文:MA Jie,WANG Wanyin,DU Xiangdong,LUO Xingang,CAI Wenjie,YANG Min,WANG Dingding.2021.Study on System of Faults in the Gulf of Mexico and Adjacent Region based on Gravity Data[J].ACTA GEOLOGICA SINICA(English edition),95(1):305~318
摘要点击次数: 459
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DOI:10.1111/1755-6724.14643
作者单位E-mail
MA Jie 1 Institute of Gravity and Magnetic Technology,School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China  
WANG Wanyin 1 Institute of Gravity and Magnetic Technology,School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China wwy7902@chd.edu.cn 
DU Xiangdong 2 CNOOC Research Institute Co.,Ltd.,Beijing 100028,China  
LUO Xingang 1 Institute of Gravity and Magnetic Technology, School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China3 Department of Earth Sciences,Memorial University of Newfoundland,St.John’s,NL A1B3X5, Canada  
CAI Wenjie 2 CNOOC Research Institute Co.,Ltd.,Beijing 100028,China  
YANG Min 1 Institute of Gravity and Magnetic Technology, School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China3 Department of Earth Sciences,Memorial University of Newfoundland,St.John’s,NL A1B3X5, Canada  
WANG Dingding 1 Institute of Gravity and Magnetic Technology,School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China  
 
Author NameAffiliationE-mail
MA Jie 1 Institute of Gravity and Magnetic Technology,School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China  
WANG Wanyin 1 Institute of Gravity and Magnetic Technology,School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China wwy7902@chd.edu.cn 
DU Xiangdong 2 CNOOC Research Institute Co.,Ltd.,Beijing 100028,China  
LUO Xingang 1 Institute of Gravity and Magnetic Technology, School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China3 Department of Earth Sciences,Memorial University of Newfoundland,St.John’s,NL A1B3X5, Canada  
CAI Wenjie 2 CNOOC Research Institute Co.,Ltd.,Beijing 100028,China  
YANG Min 1 Institute of Gravity and Magnetic Technology, School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China3 Department of Earth Sciences,Memorial University of Newfoundland,St.John’s,NL A1B3X5, Canada  
WANG Dingding 1 Institute of Gravity and Magnetic Technology,School of Geological Engineering and Geomatics,Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Chang’an University,Xi’an 710054,China  
Abstract:In the Gulf of Mexico and adjacent landmasses,faults are very complex, and their distribution is closely related to plate tectonics,ocean–land boundary,and former structure.The plane position of the faults can be identified by the maximum characteristic of the vertical derivative of the normalized vertical derivative of the total horizontal derivative (NVDR-THDR) of the Bouguer gravity anomaly.The apparent depth of the faults is inverted by the Bouguer gravity anomaly curvature property.Based on tectonic evolutionary processes and the plane distribution and apparent depth characteristics of the faults,a complete fault system for the Gulf of Mexico and adjacent areas has been established,including 102 faults.The apparent depths of 33 first-class faults are 16–20 km and for 69 second-class faults are 12–16 km.The F1-2 and F1-3 subduction fault zones are two caused by the subduction of the Cocos Plate into the old Yucatan and Chorti landmasses;F1-11 and F1-12 fault zones extend westward to the coast of Guatemala and do not extend into the continent;F1-17 and F1-20 faults,which control the boundary of the oceanic crust,do not extend southward into the continent.The fault system,which radiates in a "fan-shaped" structure as a whole,unfolds to the northeast.Faults of different nature and sizes are distributed in the Cocos Plate subduction zone, Continental, Gulf of Mexico, Yucatan old landmass and Caribbean Plate in NW, NNW, NS, NE and NEE directions.In the Gulf of Mexico region,the fault system is a comprehensive reflection of former tectonic movements,such as plate movement,drift of old landmasses and expansion of oceanic crusts.The first-class faults control the plate and ocean–continental boundaries.The second-class faults are subordinate to the first-class faults or related to the distribution of different sedimentary layers.
keywords:structural geology,tectonism,gravity anomaly,fault distribution and apparent depth,Gulf of Mexico region
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