Reconstructing craton‐scale tectonic events via in situ Rb‐Sr geochronology of poly‐phased vein mineralization
نویسندگان
چکیده
Fault- and fracture-hosted multi-stage mineral assemblages that formed by fracture reactivation fluid migration, constitute archives of the tectonic evolution Precambrian cratons. Complex intergrowth patterns these records often hinder absolute dating mineralization events for geological models. We apply LA-ICP-MS/MS in situ Rb-Sr single crystal growth zones sub-mm-wide vein including illite, K-feldspar, albite, calcite, mica, zeolites, fluorite and/or epidote at three Palaeoproterozoic crystalline bedrock sites over 300 km apart Fennoscandian Shield. The campaign reveals multiple age clusters between ca. 1757 ± 15 355 12 Ma correlating with flow initiated far-field orogens their foreland basin evolution. This new approach reconstructing histories cratons connects micro-scale determinations different fractures regional-scale crustal dynamic responses to events.
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ژورنال
عنوان ژورنال: Terra Nova
سال: 2021
ISSN: ['0954-4879', '1365-3121']
DOI: https://doi.org/10.1111/ter.12542