Oxygen isotope compositions of Miocene Garam Chashma granites, Trans-Himalayas (Hindukush Range), North Pakistan.

The Behrekdag composite batholith, which crops out as a huge N-S-trending plutonic body in central Anatolia, Turkey, consists of five mappable granitoid units of Late Cretaceous age. They are (1) the S-type, peraluminous Danacobas biotite leucogranite, (2) the I-type, hybrid, metaluminous Konur K-feldspar megacrystic quartz monzonite, (3) the mafic A-type, alkaline Kizdede monzogabbro, (4) the felsic A-type, alkaline Hasandede quartz syenite/monzonite, and (5) the M-type, low-K tholeiitic Yeniköy tonalite. The S-type Danacobas biotite leucogranite constitutes the oldest intrusive unit in the mapped area. It has coarse-to medium-crystalline texture and consists of quartz, orthoclase and plagioclase, with variable amounts of biotite and accessory minerals, including apatite, zircon and opaque phases. K-Ar age dating of biotite separates, yields cooling ages of 69.1 AE 1.42 and 71.5 AE 1.45 Ma for the Danacobas biotite leucogranite. Major-element, trace-element, and rare-earth element geochemical data suggest an exclusively peraluminous, S-type, high-K calc-alkaline, upper crustal genesis for the Danacobas biotite leucogranite. This petrogenetic interpretation is also supported by oxygen-isotope data from quartz separates, with a mean value of 10.58 AE 0.11 % of 18 O VSMOW value. The magma source of the Danacobas biotite leucogranite is proposed to have been a syncollisional leucogranitic melt derived by anatexis of high-grade metasediments of the Central Anatolian Crystalline Complex during peak conditions of regional metamorphism. This metamorphic event was induced by crustal thickening which was a result of Late Cretaceous collision between the Eurasia and Tauride-Anatolide Platform along the _ I Izmir-Ankara-Erzincan Suture Zone in central Anatolia.

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The syn-collisional Danacıobası biotite leucogranite derived from the crustal thickening in central Anatolia (Kırıkkale), Turkey

Tatar

Boztuğ

2005

Geol. J.

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Preliminary Geoheritage Assessment of The Gharam Chashma Granitic Batholith (GCGB), Southern Margin of Asian Plate, NW Pakistan: Multiple Constraints from Field Evidence, Petrology, and Physicomechanical Properties

Naseem

Anjum²,

Yaseen³

et al. 2023

Geoheritage

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Mineralogy and geochemistry of leucogranite from Miniki Gol (Chitral), northern Pakistan: implications for petrogenesis and mineralisation

2014

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Oxygen isotope compositions of Miocene Garam Chashma granites, Trans-Himalayas (Hindukush Range), North Pakistan.

Cited by 7 publications

References 41 publications

The syn-collisional Danacıobası biotite leucogranite derived from the crustal thickening in central Anatolia (Kırıkkale), Turkey

The syn-collisional Danacıobası biotite leucogranite derived from the crustal thickening in central Anatolia (Kırıkkale), Turkey

Preliminary Geoheritage Assessment of The Gharam Chashma Granitic Batholith (GCGB), Southern Margin of Asian Plate, NW Pakistan: Multiple Constraints from Field Evidence, Petrology, and Physicomechanical Properties

Mineralogy and geochemistry of leucogranite from Miniki Gol (Chitral), northern Pakistan: implications for petrogenesis and mineralisation

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