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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/130786
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- Title
- Granitic magmatism, basement ages, and provenance indicators in the Malay Peninsula : insights from detrital zircon U-Pb and Hf-isotope data
- Related
- Gondwana research, Vol. 19, Issue 4, (2011), p.1024-1039
- DOI
- 10.1016/j.gr.2010.10.010
- Publisher
- Elsevier BV
- Date
- 2011
- Author/Creator
- Sevastjanova, Inga
- Author/Creator
- Clements, Benjamin
- Author/Creator
- Hall, Robert
- Author/Creator
- Belousova, Elena A
- Author/Creator
- Griffin, William L
- Author/Creator
- Pearson, Norman
- Description
- The Malay Peninsula lies on two continental blocks, Sibumasu and East Malaya, which are intruded by granitoids in two provinces: the Main Range and Eastern. Previous models propose that Permian–Triassic granitoids are subduction-related and syn-to post-collisional. We present 752 U–Pb analyses that were carried out on zircons from river sands in the Malay Peninsula; of these, 243 grains were selected for Hf-isotope analyses. Our data suggest a more complex Sibumasu–East Malaya collision history. ¹⁷⁶Hf/¹⁷⁷Hfi ratios reveal that Permian–Triassic zircons were sourced from three magmatic suites: (a) Permian crustally-derived granitoids, (b) Early-Middle Triassic granitoids with mixed mantle–crust sources, and (c) Late Triassic crustally-derived granitoids. This suggests three Permian–Triassic episodes of magmatism in the Malay Peninsula, two of which occurred in the Eastern Province. Although the exact timing of the Sibumasu–East Malaya collision remains unresolved, current data suggest that it occurred before the Late Triassic, probably in Late Permian–Early Triassic. Our data also indicate that Sibumasu and East Malaya basements are chronologically heterogeneous, but predominantly of Proterozoic age. Some basement may be Neoarchaean but there is no evidence for basement older than 2.8 Ga. Finally, we show that Hf-isotope signatures of Triassic zircons can be used as provenance indicators.
- Description
- 16 page(s)
- Subject Keyword
- 040200 Geochemistry
- Subject Keyword
- 040300 Geology
- Subject Keyword
- Sundaland
- Subject Keyword
- Malay Peninsula
- Subject Keyword
- basement
- Subject Keyword
- detrital zircon
- Subject Keyword
- U–Pb ages
- Subject Keyword
- Hf-isotope dating
- Resource Type
- journal article
- Organisation
- Macquarie University. Department of Earth and Planetary Sciences
- Organisation
- Macquarie University. National Key Centre for Geochemical Evolution and Metallogeny of Continents (GEMOC)
- Identifier
- http://hdl.handle.net/1959.14/130786
- Identifier
- mq:14231
- Identifier
- ISSN:1342-937X
- Identifier
- mq-rm-2010005214
- Language
- eng
- Reviewed
Macquarie University ResearchOnline
