%0 Generic %A Searle, M. P. %A Whitehouse, M. J. %A Robb, L. J. %A Ghani, A. A. %A Hutchison, C. S. %A Sone, M. %A Ng, S. W.-P. %A Roselee, M. H. %A Chung, S.-L. %A Oliver, G. J. H. %D 2016 %T Tectonic evolution of the Sibumasu–Indochina terrane collision zone in Thailand and Malaysia: constraints from new U–Pb zircon chronology of SE Asian tin granitoids %U https://geolsoc.figshare.com/articles/dataset/Tectonic_evolution_of_the_Sibumasu_Indochina_terrane_collision_zone_in_Thailand_and_Malaysia_constraints_from_new_U_Pb_zircon___chronology_of_SE_Asian_tin_granitoids/3453050 %R 10.6084/m9.figshare.3453050.v1 %2 https://geolsoc.figshare.com/ndownloader/files/5421422 %2 https://geolsoc.figshare.com/ndownloader/files/5421425 %K East Malaya province %K Phuket Island show zircon core ages %K tin mineralization %K SE %K province 1. Geological %K granite %K Geology %X

Three principal granite provinces are defined across SE Asia, as follows. (1) The Western Thailand–Myanmar/Burma province consists of hornblende–biotite I-type granodiorite–granites and felsic biotite–K-feldspar (± garnet ± tourmaline) granites associated with abundant tin mineralization in greisen-type veins. New ion microprobe U–Pb dating results from Phuket Island show zircon core ages of 212 ± 2 and 214 ± 2 Ma and a thermal overprint with rims of 81.2 ± 1.2 and 85–75 Ma. (2) The North Thailand–West Malaya Main Range province has mainly S-type biotite granites and abundant tin mineralization resulting from crustal thickening following collision of the Sibumasu plate with Indochina during the Mid-Triassic. Biotite granites around Kuala Lumpur contain extremely U-rich zircons (up to 38000 ppm) that yield ages of 215 ± 7 and 210 ± 7 Ma. (3) The East Malaya province consists of dominantly Permian–Triassic I-type hornblende–biotite granites but with subordinate S-type plutons and A-type syenite–gabbros. Biotite–K-feldspar granites from Tioman Island off the east coast of Malaysia also yield a zircon age of 80 ± 1 Ma, showing Cretaceous magmatism in common with province 1. Geological and U–Pb geochronological data suggest that two east-dipping (in present-day coordinates) subduction zones are required during the Triassic, one along the Bentong–Raub Palaeo-Tethyan suture, and the other west of the Phuket–Burma province 1 belt.

%I Geological Society of London