DOI: 10.1007/s00531-015-1154-6
Scopus记录号: 2-s2.0-84931562925
论文题名: Indo-Burma Range: a belt of accreted microcontinents, ophiolites and Mesozoic–Paleogene flyschoid sediments
作者: Acharyya S.K.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 5 起始页码: 1235
结束页码: 1251
语种: 英语
英文关键词: Crustal structure
; Indo-Burma Range
; Olistostromal trench deposits
; Ophiolite accretion
; Paleogene continental flysch
; Thin-skin tectonics
Scopus关键词: accretion
; crustal structure
; Eocene
; ophiolite
; petrography
; subduction zone
; tectonic evolution
; tectonic setting
; Himalayas
; Indo-Burma
英文摘要: This study provides an insight into the lithotectonic evolution of the N–S trending Indo-Burma Range (IBR), constituting the southern flank of the Himalayan syntaxis. Paleogene flyschoid sediments (Disang–Barail) that represent a shallow marine to deltaic environment mainly comprise the west-central sector of IBR, possibly resting upon a continental base. On the east, these sequences are tectonically flanked by the Eocene olistostromal facies of the Disang, which developed through accretion of trench sediments during the subduction. The shelf and trench facies sequences of the Disang underwent overthrusting from the east, giving rise to two ophiolite suites (Naga Hills Lower Ophiolite (NHLO) andVictoria Hills Upper Ophiolite (VHUO), but with different accretion history. The ophiolite and ophiolite cover rock package were subsequently overthrusted by the Proterozoic metamorphic sequence, originated from the Burmese continent. The NHLO suite of Late Jurassic to Early Eocene age is unconformably overlain by mid-Eocene shallow marine ophiolite-derived clastics. On the south, the VHUO of Mesozoic age is structurally underlain by continental metamorphic rocks. The entire package in Victoria Hills is unconformably overlain by shallow marine Late Albian sediments. Both the ophiolite suites and the sandwiched continental metamorphic rocks are thrust westward over the Paleogene shelf sediments. These dismembered ophiolites and continental metamorphic rocks suggest thin-skinned tectonic detachment processes in IBR, as reflected from the presence of klippe of continental metamorphic rocks over the NHLO and the flyschoid Disang floor sediments and half windows exposing the Disang beneath the NHLO. © 2015, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931562925&doi=10.1007%2fs00531-015-1154-6&partnerID=40&md5=278bb4f6789952c7c49029ba73b6f016
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70289
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Geological Sciences, Jadavpur University, Kolkata, India
Recommended Citation:
Acharyya S.K.. Indo-Burma Range: a belt of accreted microcontinents, ophiolites and Mesozoic–Paleogene flyschoid sediments[J]. International Journal of Earth Sciences,2015-01-01,104(5)