Major features the Proterozoic of the Göteborg region Sweden
作者:
Lennart Samuelsson,
期刊:
Geologiska Föreningen i Stockholm Förhandlingar
(Taylor Available online 1980)
卷期:
Volume 102,
issue 2
页码: 141-144
ISSN:0016-786X
年代: 1980
DOI:10.1080/11035898009450892
出版商: Taylor & Francis Group
关键词: Areal geology;Srora Le-Marstrand formation;Dal Group;Sveconorwegian;Proterozoic;Göteborg;western Västergötland;southwestern Bohuslän;northwestern Halland;southwestern Sweden;N5725 N5805 E1230 E1130
数据来源: Taylor
摘要:
A compilation of previous and current work in the Proterozoic of the Göteborg region is given in a sketch map. It is concluded that the area to the west of the Mylonite Zone can be treated as a geological unit with the Stora Le-Marstrand supracrustal formation as the oldest component. It was intruded by tonalitic to granitic magmas 1700–1600 Ma ago. These plutons were folded and migmatized before the next period with plutonic intrusions at about 1400 Ma. Compression from west to east with mylonitization followed by folding and migmatization characterized the next period. This metamorphic event ended with the intrusion of granitic batholiths at about 1220 Ma. A major crustal break-up with general uplift, basic dike swarms, erosion and deposition of the Dal Group to the north occurred before the culmination of the Sveconorwegian regeneration at 1000–1060 Ma.
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