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Provenance and tectonic evolution of Lower Paleozoic-Upper Mesozoic strata from Sibumasu terrane, Myanmar
Cai, FL (Cai, Fulong)1; Ding, L (Ding, Lin)1,5; Yao, W (Yao, Wei)1,5; Laskowski, AK (Laskowski, Andrew K.)2; Xu, Q (Xu, Qiang)1,5; Zhang, J (Zhang, Ji'en)3; Sein, KI (Sein, Kyaing)4; Cai, FL
Source PublicationGONDWANA RESEARCH
2017
Volume41Issue:0Pages:325-336
DOI10.1016/j.gr.2015.03.005
AbstractThe provenance of Sibumasu terrane sedimentary rocks and their tectonic relationships with surrounding terranes exposed in Southeast Asia record separation and accretion of Gondwana-derived terranes during Late Paleozoic and Mesozoic time. This paper reports sandstone petrographic and U-Pb detrital zircon geochronologic data from Ordovician to Lower Jurassic strata within the Sibumasu terrane in Shan State, Myanmar. The Ordovician strata are composed of limestone and siltstone. The Lower Silurian Linwe and Upper Silurian Namhism Formations are comprised of limestone, silty sandstone, conglomerate and sandstone, respectively. Sandstones from both Ordovician and Silurian strata are dominated by 567-470 Ma and 982-917 Ma detrital zircons that are interpreted to be sourced from the eastern Gondwana supercontinent. The Carboniferous unit is composed of metasedimentary rocks (phyllite, slate, quartzite, and meta-marl). Sandstones from Carboniferous units show a strong 1165-1070 Ma detrital zircon age peak that is not present in the Ordovician and Silurian strata. These zircon grains were most likely derived from both the Albany-Fraser Province in Southwest Australia and Maud Province in Antarctic. The Upper Triassic to Lower Jurassic, shallow marine Loi-an Group consists of thin-to medium-bedded sandstone and mudstone that unconformably overly the Permian to Middle Triassic Plateau Limestone Group. Sandstones from the Loi-an Group contain abundant Permian to Triassic detrital zircons that are interpreted to have been derived from the Sukhothai Arc of the western Indochina terrane. Formation of this arc is attributed to eastward (present coordinates) subduction of Paleo-Tethyan oceanic lithosphere beneath Indochina. Therefore, we propose that the Sibumasu terrane was juxtaposed against northwestern Australia as part of the Gondwana supercontinent during Paleozoic to Early Permian time. During the Late Triassic and Early Jurassic, Sibumasu strata record an abrupt influx of Permian and Triassic zircon grains, signifying a change in provenance from Gondwana to the Sukhothai Arc. These data are consistent with a tectonic model involving rifting of the Sibumasu terrane from Gondwana and subsequent docking with the Indochina/Simao terranes during Mesozoic time. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Subject Area地质学
WOS IDWOS:000397873300021
Language英语
Indexed BySCI
KeywordTRIASSIC RADIOLARIAN FAUNAS ARC/BACK-ARC ASSEMBLAGES PLATE IGNEOUS ROCKS INDO-CHINA BLOCK ZIRCON U-PB DETRITAL ZIRCONS SE ASIA NORTHERN THAILAND SOUTHWEST CHINA SOUTHEAST-ASIA
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary ; Geology
Cooperation Status国际
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8389
Collection图书馆
Corresponding AuthorCai, FL
Affiliation1.Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China.
2.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA.
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China.
4.Myanmar Geosci Soc, Yangon, Myanmar.
5.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
Recommended Citation
GB/T 7714
Cai, FL ,Ding, L ,Yao, W ,et al. Provenance and tectonic evolution of Lower Paleozoic-Upper Mesozoic strata from Sibumasu terrane, Myanmar[J]. GONDWANA RESEARCH,2017,41(0):325-336.
APA Cai, FL .,Ding, L .,Yao, W .,Laskowski, AK .,Xu, Q .,...&Cai, FL.(2017).Provenance and tectonic evolution of Lower Paleozoic-Upper Mesozoic strata from Sibumasu terrane, Myanmar.GONDWANA RESEARCH,41(0),325-336.
MLA Cai, FL ,et al."Provenance and tectonic evolution of Lower Paleozoic-Upper Mesozoic strata from Sibumasu terrane, Myanmar".GONDWANA RESEARCH 41.0(2017):325-336.
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