Geological constraints on magmatic evolution in subduction zones and cumulative factors effective on the fertility of Cenozoic host porphyritic rocks associated with major porphyry copper deposits in the Lut Block and Kerman porphyry copper belt, Iran

Autor: Abbas Etemadi, Mohammad Hassan Karimpour
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Journal of Asian Earth Sciences: X, Vol 7, Iss , Pp 100081- (2022)
Druh dokumentu: article
ISSN: 2590-0560
DOI: 10.1016/j.jaesx.2022.100081
Popis: Iranian porphyry copper deposits (PCDs), resulted from the evolution of Neo–Tethys Ocean during the Mesozoic and Cenozoic, dominantly distributed in the five main tectono-magmatic belts that meanwhile the Kerman Porphyry Copper Belt (KPCB) is the most famous and important belt in the south of Iran while the Lut Block is the oldest and modern known porphyry belt in eastern Iran. PCDs of the KPCB (+Najmabad; group 1) hosting moderate to giant world-class deposits belong to the Oligocene–Miocene. On the other hand, PCDs of the Lut Block (except Najmabad; group 2) formed during the Eocene–Oligocene, are mostly subeconomic to barren. Despite the similarities in tectonic setting, host rock composition, hydrothermal alteration zones, and mineralization type, there are significant differences in geochemical characteristics (depression in MREE/HREE pattern (group 1) vs. horizontal trend (group 2), Sm/Yb greater than 2.4 (group 1) vs.
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