Petrogenesis of some palaeozoic rhyolites in Victoria
作者:
W. D. Birch,
期刊:
Journal of the Geological Society of Australia
(Taylor Available online 1978)
卷期:
Volume 25,
issue 1-2
页码: 75-87
ISSN:0016-7614
年代: 1978
DOI:10.1080/00167617808729015
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Thick rhyolite sheets occur within the middle Palaeozoic cauldron subsidence complexes in Victoria. Well‐preserved eutaxitic and vitroclastic textures in the basal regions of the Rubicon, Jemba, and Ryans Creek rhyolites provide evidence of an ash‐flow origin. Subsequent recrystallization during cooling has masked these primary textures towards the central and upper parts of the rhyolitic sheets. All three rhyolites show dense welding throughout and the major zonation observed is in the degree of granophyric recrystallization.
点击下载:
PDF (1227KB)
返 回