Universität zu Köln

Sandmann, Sascha, Nagel, Thorsten J., Froitzheim, Nikolaus, Ustaszewski, Kamil ORCID: 0000-0002-1642-5842 and Muenker, Carsten (2015). Late Miocene to Early Pliocene blueschist from Taiwan and its exhumation via forearc extraction. Terr. Nova, 27 (4). S. 285 - 292. HOBOKEN: WILEY. ISSN 1365-3121

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Abstract

Blueschist facies rocks in the Yuli Belt of Taiwan's Central Range record ongoing subduction of the Eurasian plate. We present a prograde Lu-Hf garnet-whole-rock age of 5.1 +/- 1.7Ma from a retrogressed blueschist in the Yuli Belt. This age is considerably younger than the previously assumed age of 14-8Ma for high-pressure metamorphism in the Yuli Belt and represents the youngest Lu-Hf garnet age ever recorded for blueschist facies metamorphism. The age sheds new light on the palaeogeographic origin and exhumation scenario of the Yuli Belt. We propose that the Yuli Belt originated from the ocean-continent boundary of the Chinese passive margin. It was subducted eastward during collision with the Luzon island arc and rapidly exhumed when the forearc lithosphere was removed from above the continental slab by discrete subduction (extraction). This process reduces the pressure above the continental slab and may prompt the ascent of subducted crust into the opening gap. Thus, it can control the exhumation of high-pressure rocks.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sandmann, Sascha UNSPECIFIED UNSPECIFIED UNSPECIFIED Nagel, Thorsten J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Froitzheim, Nikolaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Ustaszewski, Kamil UNSPECIFIED orcid.org/0000-0002-1642-5842 UNSPECIFIED Muenker, Carsten UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-398436
DOI:	10.1111/ter.12158
Journal or Publication Title:	Terr. Nova
Volume:	27
Number:	4
Page Range:	S. 285 - 292
Date:	2015
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-3121
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PRESSURE METAMORPHIC ROCKS; LU-HF; CONTINENT COLLISION; MC-ICPMS; U-PB; SUBDUCTION; EARTHQUAKE; CRUST; TOMOGRAPHY; TECTONICS Multiple languages Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39843