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DOI	10.1016/j.tecto.2020.228540
	A gas hydrate site with bi-verging folding in the outer wedge offshore SW Taiwan: Results from kinematic structural modeling and finite strain analysis
	Bernal-Olaya R.; Chi W.-C.; Kunath P.; Higgs B.; Sanchez J.; Berndt C.
发表日期	2020
ISSN	00401951
卷号	790
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.
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
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207714
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
推荐引用方式 GB/T 7714	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],2020,790.
APA	Bernal-Olaya R.,Chi W.-C.,Kunath P.,Higgs B.,Sanchez J.,&Berndt C..(2020).A gas hydrate site with bi-verging folding in the outer wedge offshore SW Taiwan: Results from kinematic structural modeling and finite strain analysis.Tectonophysics,790.
MLA	Bernal-Olaya R.,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".Tectonophysics 790(2020).