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Microfabrics of peridotites from the Mount Melbourne, Antarctica

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Title
Microfabrics of peridotites from the Mount Melbourne, Antarctica
Other Titles
남극 멜버른화산 맨틀포획암의 미구조
Authors
Kim, Daeyeong
Michibayashi, Katsuyoshi
Park, Yongcheol
Seo, Junghun
Lee, Mi Jung
Park, Kyungtae
Cho, Heymee
Issue Date
2018
Citation
Kim, Daeyeong, et al. 2018. Microfabrics of peridotites from the Mount Melbourne, Antarctica. 15th Annual Meeting of Asia Oceania Geosciences Society. Honolulu. 2018.06.03~2018.06.08.
Abstract
Peridotite xenolith can be useful to delineate the structure and evolution of mantle. We analyzed peridotite xenoliths collected around the Mount Melbourne, Northern Victoria Land, Antarctica, to understand upper mantle structure beneath the West Antarctic Rift System. The samples are massive hence the VP-Flinn diagram is applied for identifying the types of olivine LPO (Michibayashi et al., 2016, EPSL) to resolve undefined foliation and lineation. Five samples contain the D-type olivine characterized by the lineation-parallel [100] and lineation-normal [010]. One includes the A-type olivine defined by the lineation-parallel [100] and foliation-normal [010]. Both olivine types are formed under poor water and various stress conditions, which might be existed in lithosphere or shallow mantle. Our results suggest that partial melts at shallow depth (volcanism) may deliver the peridotite in lithosphere to the surface. In addition, analyzed olivine shows up to 14.1% of VP anisotropy therefore diverse mantle flow can be possible candidate to explain the occurrence of low velocity zone beneath the Mount Melbourne.
URI
https://repository.kopri.re.kr/handle/201206/12573
Conference Name
15th Annual Meeting of Asia Oceania Geosciences Society
Conference Place
Honolulu
Conference Date
2018.06.03~2018.06.08
Type
Proceeding
Indexed
Pro(초록)국외
Appears in Collections  
2017-2018, Characterizing mantle domain beneath West Antarctic Rift System and Antarctic mid-ocean ridges (17-18) / Park, Yongcheol (PE17050; PE18050)
2018-2018, Characterizing mantle domain beneath West Antarctic Rift System and Antarctic mid-ocean ridges (18-18) / Park, Yongcheol (PE18050)
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