Sr–Nd–Pb–Hf isotope systematics of the Hugo Dummett Cu–Au porphyry deposit (Oyu Tolgoi, Mongolia)

Abstract

13Major and trace element geochemistry including Sr-Nd-Pb-Hf isotopic data are

Direct Associations Between Potassic Igneous Rocks and Gold-Copper Deposits in Volcanic Arcs

“…The rocks also contain accessory magnetite, zircon and apatite (Dolgopolova et al 2013;Wainwright et al 2011). Where unaltered, these rocks are characterized by a distinct brick-red tint, comparable to the Goonumbla intrusions in New South Wales (Müller et al 1994).…”

“…The Altaid Tectonic Belt represents a complex pattern of accreted microcontinental blocks and mobile belts and it stretches for almost 5000 km across Asia from the Siberian Craton and the Tarim to the North China Craton (Kröner et al 2007). During the Paleozoic, southern Mongolia grew through accretion of subduction-related oceanic island-arcs and continental blocks (Dolgopolova et al 2013). The Oyu Tolgoi area consists of Silurian to Carboniferous polydeformed arcs that are intruded by Devonian to Permian granitoids (Wainwright et al 2011).…”

Tracking deep crust by zircon xenocrysts within igneous rocks from the northern Alxa, China: Constraints on the southern boundary of the Central Asian Orogenic Belt

“…(Chauvel et al, 2014). The zircon xenocrysts from the southern CAOB are from Dolgopolova et al (2013). The zircon xenocrysts from the YNH zone are from the literature (Dan et al, 2012(Dan et al, , 2014bGeng and Zhou, 2011;Shi et al, 2012) and our unpublished data.…”

“…The southern Mongolian domain is dominated by Silurian, Devonian and Carboniferous accretionary complexes and arc-related volcanic and volcanoclastic rocks (Badarch et al, 2002;Rojas-Agramonte et al, 2011;Dolgopolova et al, 2013;Guy et al, 2014;Jian et al, 2014). Many Paleozoic intrusions (mainly 525-277 Ma) are exposed in the southern Dalanzadgad area (Khashgerel et al, 2006;Demoux et al, 2009a;Dolgopolova et al, 2013;Wainwright et al, 2011a,b;Heumann et al, 2012).…”

“…The southern Mongolian domain is dominated by Silurian, Devonian and Carboniferous accretionary complexes and arc-related volcanic and volcanoclastic rocks (Badarch et al, 2002;Rojas-Agramonte et al, 2011;Dolgopolova et al, 2013;Guy et al, 2014;Jian et al, 2014). Many Paleozoic intrusions (mainly 525-277 Ma) are exposed in the southern Dalanzadgad area (Khashgerel et al, 2006;Demoux et al, 2009a;Dolgopolova et al, 2013;Wainwright et al, 2011a,b;Heumann et al, 2012). Most of these are granitoids with positive e Nd (t) and e Hf (t) values (e.g., Jahn et al, 2000Jahn et al, , 2004Hong et al, 2004;Kovalenko et al, 2004;Helo et al, 2006;Yarmolyuk et al, 2007;Wainwright et al, 2011b;Kröner et al, 2014;Tong et al, 2015; in press), indicating that they were derived from juvenile crust.…”