Yingchun, Cui and Xiaochun, Liu and Chenguang, Liu and Jianhui, Liu (2018) SHRIMP U-Pb zircon geochronology of granites from Sansom Island, Prydz Bay, East Antarctica. Advances in Polar Science, 29 (2). pp. 135-143.
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Abstract
Sansom Island consists of two low nunataks in Sandefjord Bay, a marginal gulf of Prydz Bay, East Antarctica. These nunataks are composed of two kinds of undeformed biotite granites, and these granites have been dated by ion-microprobe U-Pb zircon geochronology. The zircons from these two samples yield SHRIMP zircon U-Pb concordant ages of 516±5 Ma and 495.8±4.2 Ma, respectively. The results indicate that these granites were emplaced in two pulses in the Cambrian, and further demonstrates the Pan-African event that has overprinted this area. The age of ca. 516 Ma suggests that the undeformed Sansom Island Granite had a different geological history from the Landing Bluff Granite, which contains deformed granite xenoliths dated at ca. 503 Ma, and probably indicates regional variations in the age and intensity of deformation.
| Item Type: | Article |
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| Related URLs: | |
| Uncontrolled Keywords: | Granite, Sansom Island, SHRIMP U-Pb zircon geochronology, East Antarctica |
| Subjects: | Natural Environment > Terrestrial |
| Organizations: | Unspecified |
| Date Deposited: | 08 Nov 2023 11:22 |
| URI: | http://library.arcticportal.org/id/eprint/2659 |
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