Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4732889 | Journal of Asian Earth Sciences | 2006 | 17 Pages |
Abstract
The composite Kaçkar batholith, of Cretaceous to Late Eocene age, consists of various intrusions derived from different geodynamic settings ranging from early to mature arc, through collision, to post-collisional extension in the Neo-Tethyan convergence system of the eastern Pontides of NE Turkey. The intrusions were emplaced into Cretaceous and Middle Eocene volcano-sedimentary units, and are unconformably overlain by Late Cretaceous, Early to Middle Eocene and Miocene units. The 10 lithological units are grouped into five geodynamic associations on the basis of geological setting and geochemical characteristics: (1) early arc origin as represented by the medium-K calc-alkaline (CALK) Ãamlıkaya granitoid of Early Cretaceous age, (2) mature arc origin as represented by the medium- to high-K calc-alkaline Sırtyayla and Marselevat granitoids of Late Cretaceous to Early Palaeocene age, (3) syn-collisional plutonism as represented by the peraluminous Asniyor leucogranite of Palaeocene age, (4) post-collisional plutonism as represented by the high-K calc-alkaline Ayder K-feldspar megacrystic granitoid and the Sasmistal microgranite of Middle to Late Eocene age, (5) the extension-related, mildly alkaline GüllübaÄ monzonite, the medium-K calc-alkaline to slightly tholeiitic (THOL) HalkalıtaÅ quartz diorite, and the low-K tholeiitic ArdeÅen gabbro and Ä°sina diabase of Late Eocene age that are mainly exposed as small, shallow stocks and N-S, NE-SW, NW-SE and E-W trending veins.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
DurmuÅ BoztuÄ, A. Ä°hsan Erçin, M. Kemal Kuruçelik, Deniz Göç, Ä°smail Kömür, Ali Ä°skenderoÄlu,