Geochemical characteristics of the Mesozoic volcanic rocks from the Byers Peninsula of Livingston Island, West Antarctica SCOPUS

Title
Geochemical characteristics of the Mesozoic volcanic rocks from the Byers Peninsula of Livingston Island, West Antarctica
Author(s)
Xiangshen, Z.; Jiaqi, L.; Lee, J.-I.; Hwang, J.
Publication Year
1998
Abstract
The Mesozoic volcanic rocks outcropped in the Byers Peninsula of Livingston Island, West Antarctica are the products of three volcanic activities from Late Jurassic to Late Cretaceous, they belong principally to a calc-alkaline series with a character of low-potassium. These rocks are moderately enriched in light rare earth element and with low light/heavy REE fractional distillation. Rocks are enrich in LIL, such as Sr, K, Rb, Ba, Th, depleted in Nb and Ta, and more strongly depleted in Cr and Ni, indicating an island arc volcanism environment. The 87Sr/86Sr ratio of the middle Cretaceous and Late Cretaceous volcanic rocks ranges from 0.7039 to 0.7053, the ε(Nd) value are over zero, and the 87Sr/86Sr ratio only slightly varies with increasing 1/Sr, Rb, K, SiO2 etc. These facts mean that the primary magma of the volcanic rocks might be derived directly from the upper mantle with less contamination. By contrast, only the rocks with Late Jurassic ages show higher and less variable 87Sr/86Sr ratio implying a possible contamination process by few crustal materials. However, The distribution of all the rocks on Th/Ta-Th and Th/Sm-Th correlation diagrams follows same trend with the slope being positive. The Mesozoic volcanic rocks from Byers Peninsula would be generated by partial melting of the upper mantle material and erupted in different periods of volcanic activities.
ISSN
1000-0569
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/6278
Bibliographic Citation
Acta Petrologica Sinica, v.14, no.4, pp.503 - 519, 1998
Publisher
Science Press
Subject
Distillation; Exploratory geochemistry; Geochemistry; Rocks; Rubidium; Volcanoes; Byers Peninsula; Fractional distillation; Geochemical characteristic; Island arc volcanism; Light rare earth elements; Livingston Island; Mesozoic volcanic rocks; West antarctica; Volcanic rocks; igneous geochemistry; Mesozoic; volcanic rock; Antarctica
Keywords
Byers Peninsula; Geochemistry; Livingston Island; Volcanic rocks; West Antarctica
Type
Article
Language
Chinese
Document Type
Article
Publisher
Science Press
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