globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2020.228540
论文题名:
A gas hydrate site with bi-verging folding in the outer wedge offshore SW Taiwan: Results from kinematic structural modeling and finite strain analysis
作者: Bernal-Olaya R.; Chi W.-C.; Kunath P.; Higgs B.; Sanchez J.; Berndt C.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 790
语种: 英语
中文关键词: Finite Strain ; Methane Hydrate ; Outer Wedge ; Taiwan
英文关键词: Hydration ; Kinematics ; Methane ; Offshore oil well production ; Structural geology ; Convergent plate boundaries ; Detachment folds ; Evolution modeling ; Fault-propagation folds ; Finite strain analysis ; Hydrate formation ; Structural evolution ; Structural modeling ; Gas hydrates ; fault propagation ; folding ; gas hydrate ; hydrocarbon exploration ; hydrocarbon generation ; hydrocarbon migration ; hydrocarbon reservoir ; kinematics ; methane ; plate boundary ; plate convergence ; structural geology ; tectonic evolution ; Taiwan
英文摘要: Understanding the structural evolution of complex convergent plate boundaries could contribute to linking the anticipated fluid production and transportation at depth to the measured amounts of fluid stored in hydrate methane. To better understand fluid behavior within a complex convergent boundary, we propose an evolution model for a set of doubly plunging, oppositely-verging structures referred to as Ridge A and the Four-Way Closure Ridge (FWCR), located offshore southwestern Taiwan. The structures exhibit 1) initial deformation along a decollement forming a seaward (westward)-verging detachment fold, followed by 2) a landward (eastward)-verging fault propagation fold (trishear) about 8 km west of the detachment fold, and 3) a westward-verging low-angle thrusting modifying the previous structures. Furthermore, finite strain analyses based on the kinematic model suggest high pore space reduction between the detachment and fault propagation folds. The volume of methane possibly expelled during the pore space reduction is not enough to explain the high hydrocarbon concentration necessary for hydrate formation. Kinematic modeling along with finite strain analyses support the possibility of deep sourced fluid migration along such bi-vergent structures at this hydrate-rich site. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170548
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作者单位: Institute of Earth Sciences, Academia Sinica, 128, Academia Road, Section 2, Taipei, Nangang 11529, Taiwan; Universidad Industrial de Santander, Carrera 27 Calle 9, Santander, Bucaramanga, Colombia; Ecopetrol S.A., Carrera 7 No. 32-42, Bogota, Colombia; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany

Recommended Citation:
Bernal-Olaya R.,Chi W.-C.,Kunath P.,et al. A gas hydrate site with bi-verging folding in the outer wedge offshore SW Taiwan: Results from kinematic structural modeling and finite strain analysis[J]. Tectonophysics,2020-01-01,790
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