Petrochemistry of granite from Takua Pit Thong area, Ratchaburi, Thailand
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Abstract
Takua Pit Thong mine was a tin-tungsten mine associated with granites of the Western Granite Belt. Petrographic and geochemical studies reveal two granitic rock units: porphyritic granite and equigranular granite. Both granites show similar petrography characteristics except for tourmaline which appears only in equigranular granite, and their texture. Based on whole-rock geochemistry, porphyritic granite is ferroan, alkalic, peraluminous monzonite whereas equigranular granite is ferroan, alkali- to alkali-calcic, peraluminous granodiorite. Both granites show S-type affinity. Trace element plots, i.e. Rb-Y-Nb and Rb-Yb-Ta space, classify both granites to syn-collisional and within-plate granites. Moreover, the enrichment in LILE (e.g. K, Rb) and HFSE (e.g. Nb, Ti) support that the both granites formed by the partial melting of sedimentary rock in a post-collisional setting.
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Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
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