Porphyry copper assessment of the Tethys region of western and southern Asia: Chapter V in &lt;i&gt;Global mineral resource assessment&lt;/i&gt;

Zürcher, Lukas; Bookstrom, Arthur A.; Hammarstrom, Jane M.; Mars, Jason; Ludington, Steve; Zientek, Michael L.; Dunlap, Pamela; Wallis, John C.; Drew, Lawrence J.; Sutphin, David M.; Berger, Byron R.; Herrington, Richard; Billa, Mario; Kuşcu, İ̇lkay; Moon, Charlie J.; Richards, Jeremy P.

doi:10.3133/sir20105090v

Cited by 15 publications

(5 citation statements)

References 118 publications

(463 reference statements)

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“…removal of the upper crustal rocks of the Tethys belt by the effect of erosion below the protection levels of the porphyry-epithermal deposits (Richards, 2015;Moritz et al, 2022). Deformation, uplift, and magmatism associated with the arc-building event were most intense in the Lesser Caucasus in the Middle Jurassic-Early Cretaceous (Adamia, 1977;Zürcher et al, 2015). Middle Jurassic-Early Cretaceous porphyry copper systems in the Cimmeride Lesser Caucasus, which also host the Goshgarchay Cu-Au deposit are exposed to overlying and tectonically juxtaposed volcanic (Moon et al, 2001;Kekelia et al, 2001Kekelia et al, , 2004Rundkvist, 2001; et al, 2010).…”

Section: Implication For Magmatic Activity and Mineralizationmentioning

confidence: 99%

“…(wt% NaCl eq.) NA-2 −3.0 286 5.0 NA-11 −3.2 372 temperature and moderately saline magmatic fluids (Zürcher et al, 2015) is typical for a range of regional hydrothermal alterations (potassic, sericitic, advanced argillic, and propylitic) associated with ore-rich areas (Lowell and Guilbert, 1970). In the Goshgarchay Cu-Au deposit, potassic alteration could not be observed clearly.…”

Section: Salinitymentioning

confidence: 99%

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Geochemistry, Fluid Inclusions and Sulfur Isotopes of the Goshgarchay Cu‐Au Deposit (Western Azerbaijan) in Lesser Caucasus: Implications for the Origins of Ore‐forming Fluids

ARIK,

ÖZEN,

ALİMAMMADOV

2023

Acta Geologica Sinica (Eng)

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The Goshgarchay Cu‐Au deposit is located in the central part of the northwest flank of the Murovdagh region in the Lesser Caucasus. The Goshgarchay Cu‐Au deposit is associated with Middle Jurassic volcanic and Late Jurassic‐Early Cretaceous high‐K calc‐alkaline intrusive rocks. Mineralization is commonly related to quartz‐sericite‐chlorite alteration dominantly composed of chalcopyrite, gold, sphalerite, pyrite, bornite, hematite, covellite, chalcocite, malachite, and azurite. The Goshgarchay copper‐gold deposit, which is 600 m wide and approximately 1.2 km long, is seen as a fault‐controlled and vein‐, stockwork‐ and disseminated type deposit. The Goshgarchay Cu‐Au deposit predominantly comprises Cu (max. 64500 ppm) and Au (max. 11.3 ppm), while it comprises relatively less amounts Zn (max. 437 ppm), Mo (max. 47.5 ppm), Pb (max. 134 ppm), and Ag (max. 21 ppm). The homogenization temperatures and salinities of fluid inclusions in quartz for stage I range from 380 to 327°C, and 6.9 to 2.6 wt% NaCl eq., respectively. Th and salinities in quartz for stage II range from 304 to 253°C, and 7.6 to 3.2 wt % NaCl eq., respectively. The calculated δ34SH2S values (−1.5‰ to 5.5‰) of sulfides and especially the narrow range of δ34SH2S values of chalcopyrite and bornite (between −0.07 and +0.7‰) indicate that the source of the Goshgarchay Cu‐Au mineralization is magmatic. Based on the mineralogical, geochemical, fluid inclusion, and sulfur isotopic data, the Goshgarchay Cu‐Au deposit represents a late stage peripheral magmatic‐hydrothermal mineralization probably underlain by a concealed porphyry deposit.

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Section: Implication For Magmatic Activity and Mineralizationmentioning

confidence: 99%

Section: Salinitymentioning

confidence: 99%

Geochemistry, Fluid Inclusions and Sulfur Isotopes of the Goshgarchay Cu‐Au Deposit (Western Azerbaijan) in Lesser Caucasus: Implications for the Origins of Ore‐forming Fluids

ARIK,

ÖZEN,

ALİMAMMADOV

2023

Acta Geologica Sinica (Eng)

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“…In contrast to the case of Ecuador, the volcanic provinces of Konya and Beydagi are associated with coeval economic deposits. In particular, the Beydagi volcanic center was active from ~16 to 12 Ma and hosts the ~14 Ma Kisladag Au-porphyry, whereas the Konya Volcanic Belt is characterised by more or less continuous magmatism between ~12 and 3.3 Ma and hosts the ~7.2 Ma old (Zürcher et al, 2015) Doganbey Cu-porphyry and the Miocene 390 (Redwood, 2006, Hall et al, 2007 Inlice Au-epithermal deposit.…”

Section: Comparison With Ecuadormentioning

confidence: 99%

Magmatic sulphides in high-K calc-alkaline to shoshonitic and alkaline rocks

Georgatou

Chiaradia

2019

Preprint

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Abstract. We investigate in both mineralised and barren systems the occurrence and chemistry of magmatic sulphides and their chalcophile metal cargo behaviour during evolution of compositionally different magmas in diverse geodynamic settings. The investigated areas are: (a) the Miocene Konya magmatic province (hosting the Doganbey Cu-Mo and Inlice Au-epithermal deposits) (Post-Subduction) and (b) the Miocene Usak basin (Elmadag, Itecektepe and Beydagi volcanoes, the latter associated with the Kisladag Au porphyry) in Western Turkey (Post-Subduction). For comparison we also investigate (c) the barren Plio-Quaternary Kula volcanic field, west of Usak (Intraplate) and finally we discuss and compare all the above areas with the already studied (d) Quaternary Ecuadorian volcanic arc (host to the Miocene Llurimagua Cu-Mo and Cascabel Cu-Au porphyry deposits) (Subduction). The volcanism of the studied areas displays a wide range of SiO2 spanning from basalts to andesites/dacites and from high K-calc-alkaline to shoshonitic series. Multiphase magmatic sulphides occur in different amounts in all investigated areas and based on textural and compositional differences, they can be classified in different types, which crystallised at different times (early versus late saturation). A decrease in the sulphide Ni/Cu (proxy for mss-monosulphide solid solution/iss-intermediate solid solution) ratio is noted with magmatic evolution. Starting with an early stage, saturating Ni-richer/Cu-poorer sulphides hosted by early crystallising minerals e.g. olivine/pyroxene, leading up to a later stage, producing Cu-richer sulphides hosted by magnetite. The most common sulphide type resulting from an early saturating stage is composed of a Cu-poor/Ni-rich (pyrrhotite/mss) and one/two Cu-rich (cubanite, chalcopyrite/iss) phases making up 84 and 16 area % of the sulphide, respectively. Our results suggest that independently of the magma composition, geodynamic setting and whether or not the system has generated an ore deposit on the surface, sulphide saturation occurred in variable degrees in all studied areas and magmatic systems and is characterised by a similar initial metal content of the magmas. However not all studied areas present all sulphide types and the sulphide composition is dependent on the nature of the host mineral. In particular sulphides, resulting from the late stage, consisting of Cu-rich phases (chalcopyrite ,bornite, digenite/iss) are hosted exclusively by magnetite and are found only in magmatic provinces associated with porphyry Cu (Konya and Ecuador) and porphyry Au (Beydagi) deposits.

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“…These deposits are associated with subduction-related volcanic centers, although in some examples, they are thought to be associated with post-collisional volcanism [2]. Giant porphyry copper deposits in Iran and Pakistan occur in a region along the suture zone between the Arabian (Afro-Arabian) and Eurasian plates following subduction of the Neo-Tethys oceanic plate [3]. Reference [4] noted that continental arc-style magmatism related to the subduction of the Neo-Tethys oceanic plate produced several porphyry deposits such as the porphyry copper-molybdenum deposit at Sungun (northwestern Iran), the giant gold-rich porphyry copper deposit at Sarcheshmeh, and porphyry copper deposit at Meiduk.…”

Section: Introductionmentioning

confidence: 99%

Post-Mineralization, Cogenetic Magmatism at the Sungun Cu-Mo Porphyry Deposit (Northwest Iran): Protracted Melting and Extraction in an Arc System

et al. 2018

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The Sungun porphyry ore deposit is located in Eastern Azarbaijan province, Northwestern Iran. The oldest intrusive pulse in the region is a quartz-monzonite pluton, which hosts the porphyry copper-molybdenum mineralization. The Sungun Copper Mine includes the mineralized Sungun porphyry as well as six groups of cross-cutting and lithologically distinct post-mineralization dykes. The composition of these dykes ranges from quartz diorite, gabbro, diorite, dacite, lamprophyre, and microdiorite. Quartz diorite and dacite dykes are the oldest and youngest dykes, respectively. Based on their cross-cutting relationships, the composition of the dykes tend to become more primitive through time. The dykes strike Northwest–Southeast with Southwest dip, sub-parallel to the reverse faults within the deposit area. The lamprophyric dykes range from phonotephrite, to trachybasalt, tephrite, and basanite. The quartz-monzonite porphyry (SP) and the post-mineralization dykes (DK1-DK3) have clear and distinct negative anomalies of Ti, Zr, P, Pr, Ce, and Nb, as well as positive anomalies of Cs, U, K, Pb, and Nd with respect to primitive mantle. Microdioritic dykes (MDI) show depletion of Ti, Nb, P, Ta, Th, Yb, and Zr, and enrichment of Cs, Ba, U, Pb, Nd. The similarities in trace element abundances and patterns in the porphyry and post-mineralization calc-alkaline dykes implies a single source and fractional crystallization as the main mechanism controlling magmatic evolution in a collisional environment. Lamprophyric dykes have enrichment of LREE and LILE and depletion of HREE and HFSE such as Ti, Nb, and Ta. The parent magma of the lamprophyric dykes (LAM) was likely derived by low degrees of melting of a garnet lherzolite mantle peridotite. The 87Sr/86Sr and 143Nd/144Nd ratios range from 0.704617 to 0.706464 and from 0.512648 to 0.512773 for the dykes suggesting that the parental magmas came from a progressively more enriched mantle. Isotope ratios of 87Sr/86Sr and 143Nd/144Nd support a cogenetic relationship of porphyry and calc-alkaline dykes, except for the microdiorite ones. A common primary melt underwent gravity differentiation in a deep magmatic chamber to form a dioritic magma. This subsequently migrated to shallower levels to evolve further and feed individual dyke groups into the Sungun porphyry.

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Porphyry copper assessment of the Tethys region of western and southern Asia: Chapter V in <i>Global mineral resource assessment</i>

Cited by 15 publications

References 118 publications

Geochemistry, Fluid Inclusions and Sulfur Isotopes of the Goshgarchay Cu‐Au Deposit (Western Azerbaijan) in Lesser Caucasus: Implications for the Origins of Ore‐forming Fluids

Geochemistry, Fluid Inclusions and Sulfur Isotopes of the Goshgarchay Cu‐Au Deposit (Western Azerbaijan) in Lesser Caucasus: Implications for the Origins of Ore‐forming Fluids

Magmatic sulphides in high-K calc-alkaline to shoshonitic and alkaline rocks

Post-Mineralization, Cogenetic Magmatism at the Sungun Cu-Mo Porphyry Deposit (Northwest Iran): Protracted Melting and Extraction in an Arc System

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