气候变化领域集成服务门户(CCPortal): Extensional fault-related folding of the North West shelf, Western Australia

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DOI	10.1306/08301918030
	Extensional fault-related folding of the North West shelf, Western Australia
	McHarg S.; Elders C.; Cunneen J.
发表日期	2020
ISSN	0149-1423
起始页码	913
结束页码	938
卷号	104 期号:4
英文摘要	The occurrence of fault-related folds in extensional settings has been gaining increased recognition during the past 20 yr. Passive margins and rift basins often present intriguing structural complexities that are potential sites for the development of extensional fault-related folds. Fault-related folds are important anticlinal traps for hydrocarbon exploration, and understanding their evolution is critical for derisking the timing of trap formation and hydrocarbon generation. This study presents folds from three areas across the North West shelf (NWS) of Western Australia and aims to determine their relationship to associated extensional faults. A series of kinematic forward models are presented as well as detailed structural and stratigraphic interpretation of folding at the three locations. The models suggest each of the three examples have formed under extension that impacted the region during the Mesozoic. The modeling also highlights different characteristics of folding that are caused by fault geometry (ramp-flat) and a propagating fault tip (trishear) that can be used as diagnostic features to distinguish different fold mechanisms. Historical exploration across the NWS has targeted a relatively small number of these anticlinal traps, some of which have been successful (e.g., Marina-1 well, Petrel subbasin) and some have not (e.g., Candace-1, Sholl Island fault anticline). This paper suggests that the prospectivity of anticlinal structures should be more carefully assessed to determine whether or not they are related to extensional activity and hence likely to have formed prior to the bulk of the hydrocarbon charge. Similar structures undoubtedly exist in other basins that have experienced repeated extension. © 2020 The American Association of Petroleum Geologists. All rights reserved.
关键词	Faulting Hydrocarbons Stratigraphy Anticlinal structure Diagnostic features Extensional faults Fault-related fold Hydrocarbon exploration Hydrocarbon generation North west shelves Structural complexity Petroleum prospecting complexity continental margin data interpretation extensional tectonics fault geometry fault zone folding hydrocarbon exploration hydrocarbon generation recognition Australia Western Australia
语种	英语
来源机构	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131666
推荐引用方式 GB/T 7714	McHarg S.,Elders C.,Cunneen J.. Extensional fault-related folding of the North West shelf, Western Australia[J]. AAPG Bulletin,2020,104(4).
APA	McHarg S.,Elders C.,&Cunneen J..(2020).Extensional fault-related folding of the North West shelf, Western Australia.,104(4).
MLA	McHarg S.,et al."Extensional fault-related folding of the North West shelf, Western Australia".104.4(2020).