期刊
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
卷 44, 期 3, 页码 403-416出版社
SIR PUBLISHING
DOI: 10.1080/00288306.2001.9514947
关键词
Antarctica; structure; ductile faults; metamorphism; tectonics; South Victoria Land; Ross Orogeny
Five structurally distinct crustal sub-blocks are recognised in the Walcott Bay-Foster Glacier area of South Victoria Land. The Radian sub-block consists of variably deformed greenschist and amphibolite facies metasediments, some Of which have original elastic textures preserved. The Rucker sub-block is made up almost entirely of amphibolite facies marble folded into a broad synform on the 10 km scale. The Glee sub-block is made up of three parallel belts of metasediments with northeast strike. The Renegar sub-block consists of metasediments deformed around kilometre-scale plutons. The Kemp sub-block is composite, including exotic quartzofeldspathic metasediments and orthogneiss extensively altered by metamorphic muscovite. The five sub-blocks have been amalgamated into the Walcott crustal block along amphibolite facies ductile shear zones which a dominantly strike-slip motion. The Walcott Block has a northeast-striking structural grain, and has been intruded by Middle Cambrian alkaline intrusions. The numerous structural discontinuities identified in the Walcott Bay-Foster Glacier area preclude mapping of lithostratigraphy and metamorphic isograds.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据