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Origin of the Early-Middle Devonian magmatism in the Sakarya Zone, NW Turkey: Geochronology, geochemistry and isotope systematics
Date
2012-02-02
Author
AYSAL, Namık
Ustaomer, Timur
Ongen, Sinan
Keskin, Mehmet
Köksal, Serhat
Peytcheva, Irena
Fanning, Mark
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A unique example of isotopically-dated Devonian metagranitoid (the camlik metagranite; Okay et al., 1996) crops out in the Biga Peninsula, NW Turkey, although its contact relationships with the country rocks and geodynamic setting have remained to be enigmatic so far. Our field work, however, has shown that a number of metagranitoid bodies similar to the camlik metagranite intruded the country rocks and developed contact metamorphic zones, consisting of andalusite and calcsilicate hornfelses, garnet-epidote and diopsite-wollastonite skarns. The country rocks of these metagranitoids are made up of regionally metamorphosed metaclastic successions with subordinate metacarbonate-metachert-metabasites (the Kalabak formation), intercalated with tectonic slices of meta-serpentinites. The metagranitoids and the Kalabak formation are collectively termed here the Havran Unit which forms a NE-SW trending, 20 km wide and 80 km long belt in the Biga Peninsula. The Havran Unit is unconformably overlain by the Late Triassic shallow marine sediments and is in tectonic contact with the Permo-Triassic Karakaya Complex, interpreted as the Palaeotethyan subduction-accretion complex.
Subject Keywords
Sakarya Zone
,
Havran Unit
,
Devonian metagranitoids
,
Post-collisional magmatism
,
U/Pb zircon dating
URI
https://hdl.handle.net/11511/46069
Journal
JOURNAL OF ASIAN EARTH SCIENCES
DOI
https://doi.org/10.1016/j.jseaes.2011.10.011
Collections
Test and Measurement Center In advanced Technologies (MERKEZ LABORATUVARI), Article
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N. AYSAL et al., “Origin of the Early-Middle Devonian magmatism in the Sakarya Zone, NW Turkey: Geochronology, geochemistry and isotope systematics,”
JOURNAL OF ASIAN EARTH SCIENCES
, pp. 201–222, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46069.