气候变化领域集成服务门户(CCPortal): Field documentation and genesis of back-structures in ductile and brittle regimes from the foreland part of a collisional orogen: examples from the Darjeeling

CCPortal

DOI	10.1007/s00531-019-01709-7
	Field documentation and genesis of back-structures in ductile and brittle regimes from the foreland part of a collisional orogen: examples from the Darjeeling–Sikkim Lesser Himalaya; India
	Bose N.; Mukherjee S.
发表日期	2019
ISSN	14373254
起始页码	1333
结束页码	1350
卷号	108 期号:4
英文摘要	In the foreland-side of an orogen, thrust-related structures develop that verge towards the foreland (fore-thrusts). Although much less abundant, structures with opposite vergence (i.e., towards hinterland), named, back-structures, also exist. We report back-structures (exposure scale back-thrusts and associated folds) from the Darjeeling Sikkim Lesser Himalaya, India. These structures occur mainly in three Back-Structure Zones (BSZ-A, -B, and C). Back-structures probably originated in the ductile regime and continued in the brittle domain. Tectonic setting of the study area, such as- critical taper, duplexing, etc. indicates a good potential for the presence of back-structures in this region. Along with the previous work on back-structures in collisional orogens, Himalaya in particular, these structures seem to be ubiquitous. The correlation of field observations with tectonics indicate that mechanisms, e.g., critical taper, sub-surface barriers, and passive roof duplex played roles in forming back-structures in this part of the Sikkim Lesser Himalaya. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Brittle shear zone; Collisional orogen; Deformation mechanism; Meso-scale deformation; Regional faults; Tectonics
语种	英语
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147834
作者单位	Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400 076, India
推荐引用方式 GB/T 7714	Bose N.,Mukherjee S.. Field documentation and genesis of back-structures in ductile and brittle regimes from the foreland part of a collisional orogen: examples from the Darjeeling–Sikkim Lesser Himalaya; India[J],2019,108(4).
APA	Bose N.,&Mukherjee S..(2019).Field documentation and genesis of back-structures in ductile and brittle regimes from the foreland part of a collisional orogen: examples from the Darjeeling–Sikkim Lesser Himalaya; India.International Journal of Earth Sciences,108(4).
MLA	Bose N.,et al."Field documentation and genesis of back-structures in ductile and brittle regimes from the foreland part of a collisional orogen: examples from the Darjeeling–Sikkim Lesser Himalaya; India".International Journal of Earth Sciences 108.4(2019).