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Title

Structural control of the Cenozoic porphyry Cu-Mo, epithermal and skarn deposits and prospects, Central Tethyan belt, Lesser Caucasus

Authors
Tayan, Rodrik
Melkonyan, Rafael
Harutyunyan, Marianna
Published in Proceedings of the 14th SGA Biennial Meeting. Québec City, Canada - 20-23 August 2017 - . 2017
Abstract The Cenozoic evolution of the central segment of the Tethyan metallogenic belt is dominated by the oblique convergence and final collision of Gondwana-derived terranes and the Arabian plate with Eurasia, which created a favorable setting for the formation of the highly mineralized Meghri-Ordubad pluton inthe southernmost Lesser Caucasus, in the Zangezur-Ordubad mining district. Paleostress reconstructions indicate anti-clockwise rotation from NE-oriented compression during the early and middle Eocene to NNW-oriented compression during the Pliocene. During the Eocene the N-S oriented faults are consistent with dextral strike-slip tectonics, correspond to synthetic faults and control the main porphyry Cu-Mo and epithermal deposits and prospects. The sinistral E-W oriented en- échelon faults correspond to antithetic faults. This strike-slip kinematics is consistent with the regional NE-oriented compression in the Zangezur-Ordubad district and concomitant with final subduction of the Neotethys along the Eurasian margin. Sinistral strike-slip kinematics along the E-W oriented faults resulted in clockwise rotation of the individual blocks of the Zangezur-Ordubad district. During the Oligocene and Miocene anti-clockwise rotation of the main paleostress compressional orientation resulted in reactivation of existing ore-controlling structures in a sinistral strike-slip tectonic regime, which is consistent with the re-orientation of the tectonic plate kinematics and re- organization of the Arabia-Eurasia collision.
Full text
Structures
Research group Mineral Resources and Geofluids
Projects FNS: 200020- 138130, 200020-155928 and 200020-168996
SCOPES projects IB7620-118901 and IZ73Z0-128324
Citation
(ISO format)
HOVAKIMYAN, Samvel et al. Structural control of the Cenozoic porphyry Cu-Mo, epithermal and skarn deposits and prospects, Central Tethyan belt, Lesser Caucasus. In: Proceedings of the 14th SGA Biennial Meeting. Québec City, Canada. [s.l.] : [s.n.], 2017. https://archive-ouverte.unige.ch/unige:96387

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Deposited on : 2017-08-30

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