Jurassic to Tertiary metallogenic evolution of the southernmost Lesser Caucasus, Tethys belt

被引：0

作者：

Moritz, Robert ^{[1
]}

Mederer, Johannes ^{[1
]}

Ovtcharova, Maria ^{[1
]}

Spikings, Richard ^{[1
]}

Selby, Dave

Melkonyan, Rafael

Hovakimyan, Samvel

Tayan, Rodrig

Ulianov, Alexey

Ramazanov, Vagif

机构：

[1] Univ Geneva, CH-1211 Geneva 4, Switzerland

来源：

MINERAL DEPOSIT RESEARCH FOR A HIGH-TECH WORLD, VOLS. 1-4 | 2013年

关键词：

Lesser Caucasus; Tethys geochronology; intrusion-related; porphyry-Cu-Mo; epithermal; COLLISION; OBDUCTION; ARMENIA;

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Magmatic rocks and ore deposits of the southern part of the Lesser Caucasus were investigated by U-Pb dating of zircons, Re-Os dating of sulphides and 40Ar/39Ar dating of hydrothermal muscovite and alunite. The new isotpe age data reveal an east to west progression of magmatic and mineralizing events, which can be correlated with different stages of the geodynamic evolution of the Tethys orogenic belt. Magmatic and intrusion-related ore deposit ages between 166 and 131 Ma in the Kapan block correspond to main island arc formation during Tethys subduction along Eurasia. Magmatism and porphyry-Cu-Mo deposits at 45-40 Ma in the Meghri pluton, followed Upper Cretaceous accretion of Gondwana-derived terranes with Eurasia, and are correlated with subduction of the western branch of the Neotethys as the Arabian plate was converging with Eurasia. Interruption of magmatism and ore-formation in the Meghri pluton at 40-30 Ma coincides with final closure of the Neotethys and Arabia-Eurasia collision. Renewed nnagmatism and ore formation between 31 and 22 Ma are post-collisional events. The world-class Kadjaran porphyry-Cu-Mo deposit was formed during this event.

引用

页码：1447 / 1450

页数：4

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