ITPCAS OpenIR  > 图书馆
Early Cretaceous wedge extrusion in the Indo-Burma Range accretionary complex: implications for the Mesozoic subduction of Neotethys in SE Asia
Zhang, JE (Zhang, Ji'en)1; Xiao, WJ (Xiao, Wenjiao)1,2,3; Windley, B (Windley, Brian F.)4; Cai, FL (Cai, Fulong)5; Sein, K (Sein, Kyaing)6; Naing, S (Naing, Soe)6; Zhang, JE
Source PublicationINTERNATIONAL JOURNAL OF EARTH SCIENCES
2017-05-17
Volume106Issue:4Pages:1391-1408
DOI10.1007/s00531-017-1468-7
Abstract

The Indo-Burma Range (IBR) of Myanmar, the eastern extension of the Yarlung-Tsangpo Neotethyan belt of Tibet in China, contains m,langes with serpentinite, greenschist facies basalt, chert, sericite schist, silty slate and unmetamorphosed Triassic sandstone, mudstone and siltstone interbedded with chert in the east, and farther north high-pressure blueschist and eclogite blocks in the Naga Hills m,lange. Our detailed mapping of the Mindat and Magwe sections in the middle IBR revealed a major similar to 18 km antiformal isocline in a m,lange in which greenschist facies rocks in the core decrease in grade eastwards and westwards symmetrically 'outwards' to lower grade sericite schist and silty slate, and at the margins to unmetamorphosed sediments, and these metamorphic rocks are structurally repeated in small-scale imbricated thrust stacks. In the Mindat section the lower western boundary of the isoclinal m,lange is a thrust on which the metamorphic rocks have been transported over unmetamorphosed sediments of the Triassic Pane Chaung Group, and the upper eastern boundary is a normal fault. These relations demonstrate that the IBR metamorphic rocks were exhumed by wedge extrusion in a subduction-generated accretionary complex. Along strike to the north in the Naga Hills is a comparable isoclinal m,lange in which central eclogite lenses are succeeded 'outwards' by layers of glaucophane schist and glaucophanite, and to lower grade greenschist facies sericite schist and slate towards the margins. In the Natchaung area (from west to east) unmetamorphosed Triassic sediments overlie quartzites, sericite schists, actinolite schists and meta-volcanic amphibolites derived from MORB-type basalt, which are in fault contact with peridotite. Olivine in the peridotite has undulatory extinction suggesting deformation at 600-700 A degrees C, similar to the peak temperature of the amphibolite; these relations suggest generation in a metamorphic sole. The amphibolites have U/Pb zircon ages of 119 +/- 3 Ma and 115 Ma, which are close to the zircon ages of nearby calc-alkaline granite and diorite, which belong to an active continental margin arc that extends along the western side of the Shan-Thai block. The IBR accretionary complex and the active continental margin arc were generated during Early Cretaceous (115-128 Ma) subduction of the Neotethys Ocean.

Subject Area地质学
WOS IDWOS:000401629200013
Language英语
Indexed BySCI
KeywordManipur Ophiolite Complex Myanmar Orogenic Belt Zircon U-pb Northeast India Naga Hills Tectonic Evolution Western Myanmar Emplacement History Plate Stratigraphy Southeast-asia
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary ; Geology
Cooperation Status国际
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8230
Collection图书馆
Corresponding AuthorZhang, JE
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Tethys Res Ctr, Beijing 100029, Peoples R China.
2.Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China.
3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China.
4.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England.
5.Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China.
6.Myanmar Geosci Soc, Yangon, Myanmar.
Recommended Citation
GB/T 7714
Zhang, JE ,Xiao, WJ ,Windley, B ,et al. Early Cretaceous wedge extrusion in the Indo-Burma Range accretionary complex: implications for the Mesozoic subduction of Neotethys in SE Asia[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2017,106(4):1391-1408.
APA Zhang, JE .,Xiao, WJ .,Windley, B .,Cai, FL .,Sein, K .,...&Zhang, JE.(2017).Early Cretaceous wedge extrusion in the Indo-Burma Range accretionary complex: implications for the Mesozoic subduction of Neotethys in SE Asia.INTERNATIONAL JOURNAL OF EARTH SCIENCES,106(4),1391-1408.
MLA Zhang, JE ,et al."Early Cretaceous wedge extrusion in the Indo-Burma Range accretionary complex: implications for the Mesozoic subduction of Neotethys in SE Asia".INTERNATIONAL JOURNAL OF EARTH SCIENCES 106.4(2017):1391-1408.
Files in This Item:
File Name/Size DocType Version Access License
V.106(4) 1391-1408 2(11578KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhang, JE (Zhang, Ji'en)]'s Articles
[Xiao, WJ (Xiao, Wenjiao)]'s Articles
[Windley, B (Windley, Brian F.)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhang, JE (Zhang, Ji'en)]'s Articles
[Xiao, WJ (Xiao, Wenjiao)]'s Articles
[Windley, B (Windley, Brian F.)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhang, JE (Zhang, Ji'en)]'s Articles
[Xiao, WJ (Xiao, Wenjiao)]'s Articles
[Windley, B (Windley, Brian F.)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: V.106(4) 1391-1408 2017.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.