The Geo/Thermo-Chronology Of Dismal Island (Marguerite Bay, Antarctic Peninsula) ...
Dismal Island is located at the entrance of Marguerite Bay between Adelaide Island to the northeast and Alexander Island to the southwest within the Antarctic Peninsula. It’s unique position between Alexander and Adelaide islands allows us to test and link these regions regarding Cenozoic magmatism...
| Main Authors: | , , , , , , |
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| Format: | Dataset |
| Language: | English |
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Aperta
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.48623/aperta.263286 https://aperta.ulakbim.gov.tr/record/263286 |
| Summary: | Dismal Island is located at the entrance of Marguerite Bay between Adelaide Island to the northeast and Alexander Island to the southwest within the Antarctic Peninsula. It’s unique position between Alexander and Adelaide islands allows us to test and link these regions regarding Cenozoic magmatism and tectonics due to subduction of the Pacific plate beneath the AP along the northern margin. Dismal Island was visited in February 2021 in the frame of Turkish Antarctic Expedition VI (TAE-6). Thirteen samples were collected for petrography, geochronology, and low-temperature thermochronology (LTT). Three samples were dated by LA-ICP-MS zircon U-Pb, two samples were dated by apatite Fission Track, and one sample was dated by apatite U-Th/He method. The island comprises massif quartz-diorite, tonalite, mafic, and felsic dikes, indicating a hybrid magma source. Three zircon U-Pb ages yield a 47-48 Ma crystallization age for the magmatic body. The apatite Fission Track (AFT) ages yield a 41 Ma cooling age ... |
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