Geology and geochemistry of the pre-Early Cambrian rocks in the Sandikli area: Implications for the Pan-African evolution of NW Gondwanaland

2004-10-01
Gursu, S
Göncüoğlu, Mehmet Cemal
Bayhan, H
The pre-Early Cambrian Sandikli Basement Complex in western Central Anatolia comprises a low-grade metasedimentary succession (Guvercinoluk Formation) and meta-rhyolites intruded by meta-quartz porphyry rocks (Kestel Cayi Porphyroid Suite). The Guvercinoluk Formation consists of alternation of meta-siltstones and meta-sandstones with olistostromal conglomerates, rare black chert and cherty meta-dolomite lenses. The Kestel Cayi Porphyroid Suite is a deformed, highly sheared dome-shaped rhyolitic body with quartz porphyry rocks. Quartz porphyry dykes intrude both the volcanic carapace and the meta-sedimentary rocks of the Guvercinoluk Formation. Both the meta-quartz porphyry rocks and meta-rhyolites are typically mylonitic with relict igneous textures. Geochemical data indicate that the felsic rocks of the Kestel Cayi Porphyroid Suite are subalkaline and display characteristic features of post-collisional, I-type granitoids. The basement complex is unconformably overlain by variegated conglomerates, mudstones and arkosic sandstones with andesitic lavas, followed by siliciclastic rocks and carbonates that yielded Early Middle Cambrian fossils.
GONDWANA RESEARCH

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Citation Formats
S. Gursu, M. C. Göncüoğlu, and H. Bayhan, “Geology and geochemistry of the pre-Early Cambrian rocks in the Sandikli area: Implications for the Pan-African evolution of NW Gondwanaland,” GONDWANA RESEARCH, pp. 923–935, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32169.