Is the switch from I- to S-type magmatism in the Himalayan Orogen indicative of the collision of India and Eurasia?
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White, Lloyd; Ahmad, Talat; Lister, Gordon; Forster, Margaret; Ireland, Trevor
Description
The switch from I- to S-type magmatism in the Trans-Himalayan Batholith is one of the criteria used to determine when India and Eurasia collided. We present new 238U/ 206Pb SHRIMP data from the Karakorum Batholith, NW India. Our results suggest that an I-type hornblende-biotite granodiorite was emplaced at 31.4 ± 0.4 Ma and crosscut by S-type granite dykes at 18.0 ± 0.4 Ma. We interpret these data to indicate that volatile-fluxed melting of a mantle wedge above an active subduction zone and/or...[Show more]
Collections | ANU Research Publications |
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Date published: | 2012 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/62087 |
Source: | Australian Journal of Earth Sciences |
DOI: | 10.1080/08120099.2012.652670 |
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01_White_Is_the_switch_from_I-_to_2012.pdf | 6.9 MB | Adobe PDF | Request a copy |
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