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Laser microprobe 40Ar–39Ar analysis of pseudotachylyte and host-rocks from the Tatra Mountains, Slovakia: evidence for late Palaeogene seismic/tectonic activity

Kohut, Milan and Sherlock, Sarah C. (2003). Laser microprobe 40Ar–39Ar analysis of pseudotachylyte and host-rocks from the Tatra Mountains, Slovakia: evidence for late Palaeogene seismic/tectonic activity. Terra Nova, 15(6) pp. 417–424.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1046/j.1365-3121.2003.00514.x
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Abstract

Laserprobe 40Ar–39Ar data from fault-related pseudotachylytes and granitic host-rocks from the Tatra Mountains (Central Western Carpathians) resolve the controversy over the age of propagation of the sub-Tatra detachment fault. This major structure has resulted in exhumation of crystalline basement to the north-west, and subsidence and sediment deposition in the Palaeogene Central Carpathians Basin to the south-east. Host-rock biotite ages range from 331 Ma to 322 Ma, and pseudotachylyte spot ages range from 164 Ma to 28 Ma. Of these, the youngest group identify the maximum timing of the early stages of Tatra Mountains uplift, which continued in the Miocene (20–10 Ma) and culminated during the Quaternary. The wide-ranging older ages are an artefact of an unsupported 40Ar component that is most likely a combination of both inherited and excess argon.

Item Type: Journal Article
ISSN: 0954-4879
Extra Information: Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract.
Keywords: Ar-Ar; argon geochronology; pseudotachylite
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 2238
Depositing User: Sarah Sherlock
Date Deposited: 08 Jun 2006
Last Modified: 02 Dec 2010 19:47
URI: http://oro.open.ac.uk/id/eprint/2238
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