Details

Autor(en) / Beteiligte

• Yao, Wei
• Ding, Lin
• Cai, Fulong
• Wang, Houqi
• Xu, Qiang
• Zaw, Than

Titel

Origin and tectonic evolution of upper Triassic Turbidites in the Indo-Burman ranges, West Myanmar

Ist Teil von

• Tectonophysics, 2017-11, Vol.721, p.90-105

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2017

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• The Pane Chaung Formation is exposed in the Indo-Burman Ranges, and has been involved in collision between the Indian Plate and West Burma Block. However, controversies exist over the provenance and paleogeographic reconstruction of the Pane Chaung Formation. This study presents new petrographical and detrital zircon UPb ages and Hf isotopic data from the Pane Chaung Formation in Rakhine Yoma and Chin Hills, west Myanmar. The depositional age of the Pane Chaung Formation is Late Triassic, indicated by the Carnian-Norian Halobia fossils and maximum depositional ages between 233.0±2.5Ma and 206.2±1.8Ma. Upper Triassic sandstones contain 290–200Ma detrital zircons, εHf(t) values of −6 to 11 and TDMC of 1.6 to 0.6Ga, interpreted to be derived from West Papua region. The most abundant zircon age population of 750–450Ma is derived from Pan-African orogenic belts in Australia. Zircons of 1250–900Ma age were derived from the Grenvillian orogen in Australia. Archean zircons are interpreted to be derived from the Yilgarn and Pilbara cratons in Western Australia. Detrital zircon ages of the Pane Chaung Formation are distinct from similar aged strata in Indochina and Sibumasu, but comparable to NW Australia (Carnarvon Basin) and Greater India (Langjiexue Formation). It is suggested that the Pane Chaung Formation was deposited in a Late Triassic submarine fan along the northern margin of Australia. •Presented new petrographical and detrital zircon U-Pb ages and Hf isotopic data from the Pane Chaung Formation, west Myanmar.•The Pane Chaung Formation deposited in Late Triassic•290–200Ma detrital zircons were derived from West Papua region.•750–450Ma and 1250–900Ma zircons were derived from the Pan-African and Grenvillian orogenic belts in Australia.•The Pane Chaung Formation was deposited in a submarine fan along the northern margin of Australia.