气候变化领域集成服务门户(CCPortal): Structural interpretation of frontal folds and hydrocarbon exploration, western sulaiman fold belt, Pakistan

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DOI	10.1016/j.marpetgeo.2020.104380
	Structural interpretation of frontal folds and hydrocarbon exploration, western sulaiman fold belt, Pakistan
	Jadoon, Ishtiaq A. K.; Ding, Lin; Nazir, Jabir; Idrees, Muhammad; Jadoon, Saif-ur-Rehman K.
通讯作者	Jadoon, SURK (通讯作者)
发表日期	2020
ISSN	0264-8172
EISSN	1873-4073
卷号	117
英文摘要	Seismic reflection profiles and borehole data combined with geological mapping was used to analyze foreland structures with 3-D structural variation, estimates of shortening, and kinematic evolution of western Sulaiman fold belt (SFB), Pakistan. The western SFB is interpreted with passive-roof duplex geometry. The floor thrust (decollement) is interpreted in Triassic strata rather than its inference in Precambrian-Cambrian evaporites. Whereas, the roof thrust (upper detachment) of hinterland vergence is located in Eocene Ghazij shale. Based on seismic data, the folds in the frontal duplex are interpreted as fault-propagation and fault-bend type. They are located over curved and staircase geometry of blind back thrusts. The folds-and-thrusts of EW trend show right-hand en-echelon stepping along NW-SE oriented mountain front due to drag along the western margin of the fold belt. The blind thrusts cut across the hanging-wall flat of the duplex horse with roots in base Triassic at depth of similar to 4-4.5 km 3D surfaces of reservoir strata show three areas of closed elliptical contours as potential prospects over blind thrusts, with maximum structural relief of similar to 2200 m. Shortening of 2100 (22%) and 9950 m (47%) is calculated along with thrusts in the frontal duplex with the interpretation of out-of-sequence structures. Passive roof duplex structures between foreland and hinterland vergent back-thrusts are reported from mountain belts around the world. We have identified out-of-sequence deformation in the frontal duplex with stacked structures. Identification of these features adds to our understanding of the development of mountain fronts in the context of Anderson's theory of faulting with the presence of a conjugate set of faults and foreland propagation of mountain fronts with secondary out-of-sequence deformation. Subsurface seismic data appears to be critical in their recognition for analysis of active foreland deformation and assessment of hydrocarbon plays in the fold belts.
关键词	THRUST BELT TECTONIC IMPLICATIONS MOUNTAIN BELTS GEOMETRY RANGE BALUCHISTAN EARTHQUAKES MECHANICS EVOLUTION SEQUENCE
英文关键词	Fault-propagation and fault-bend folds; Foreland deformation; Passive-roof duplex; Out-of-sequence structures; Hydrocarbon exploration
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000537575300025
来源期刊	MARINE AND PETROLEUM GEOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259917
推荐引用方式 GB/T 7714	Jadoon, Ishtiaq A. K.,Ding, Lin,Nazir, Jabir,et al. Structural interpretation of frontal folds and hydrocarbon exploration, western sulaiman fold belt, Pakistan[J]. 中国科学院青藏高原研究所,2020,117.
APA	Jadoon, Ishtiaq A. K.,Ding, Lin,Nazir, Jabir,Idrees, Muhammad,&Jadoon, Saif-ur-Rehman K..(2020).Structural interpretation of frontal folds and hydrocarbon exploration, western sulaiman fold belt, Pakistan.MARINE AND PETROLEUM GEOLOGY,117.
MLA	Jadoon, Ishtiaq A. K.,et al."Structural interpretation of frontal folds and hydrocarbon exploration, western sulaiman fold belt, Pakistan".MARINE AND PETROLEUM GEOLOGY 117(2020).