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cu-au fertility of arc volcanic rocks

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cu-au fertility of arc volcanic rocks

2019-5-8 · The Cu and Au contents of igneous rocks, particularly those associated with porphyry Cu ± Au deposits, are often remobilized by hydrothermal alteration and do not reflect magmatic composition. Recent studies on platinum group element (PGE) geo-chemistry of subvolcanic rocks associated with porphyry Cu ± Au deposits (Cocker et al. 2015; Hao et ...


2021-7-6 · The Cu and Au budgets of primary arc magmas are predominantly affected by the ... phenocrysts from the Merapi volcanic rocks, ... Cu and Au fertility but …


Magma fertility, the metal abundance in magma, has been considered to be one of the key factors for the formation of porphyry Cu±Au deposits. In this study we provide clear evidence to support the hypothesis that the platinum group element (PGE) can be used to distinguish barren from ore-bearing Cu±Au felsic suites. We determined the PGE contents of three barren volcanic and subvolcanic ...


2020-1-9 · Finally, the relatively water‐rich and fertile nature of arc magma of the Tulasu district indicates high exploration potential for significant porphyry Cu‐Au deposits. The existing alteration‐immobile fertility proxy (V/Sc) for intrusive rocks may also be useful to assess the fertility of cogenetic volcanic rocks, in turn with implications for unexposed porphyry Cu deposits at depths.


2021-7-30 · Porphyry Cu-Au ± Mo Deposits. Porphyry Cu-Ay ± Mo mineralisation typically occurs as Cu-Fe sulphides hosted within stockwork quartz veins or disseminations within, and immediately adjacent to, intermediate composition magmatic arc porphyritic intrusions, varying to Au …


2020-8-28 · Östra Cu-(W-Au) deposit and to re-evaluate it as economic. Boliden AB is now preparing for production of the deposit in 2023. A resource estimate is shown in Table 1. Due to the focus on the Aitik deposit, geological studies on the Liikavaara Östra Cu-(W-Au) deposit are limited. To date, the most comprehensive study is the PhD thesis by Zweifel


2011-11-1 · Porphyry Cu ± Mo ± Au deposits are commonly associated with intermediate composition arc-related igneous rocks with high Sr/Y (and La/Yb) ratios, and such rocks are equated by some researchers with melts derived from subducted oceanic crust …


1998-9-23 · DESCRIPTIVE MODEL OF PORPHYRY Cu-Au By Dennis P. Cox DESCRIPTION Stockwork veinlets of chalcopyrite,bornite, and magnetite in porphyritic intrusions and coeval volcanic rocks.Ratio of Au (ppm) to Mo (percent) is greater than 30 (see fig. 77). GENERAL REFERENCES Sillitoe (1979), Cox and Singer (in press). GEOLOGICAL ENVIRONMENT.—.


Copper-Gold Fertility of Arc Volcanic Rocks: A Case Study from the Early Permian Lizzie Creek Volcanic Group, NE Queensland, Australia. Helge Behnsen; Helge Behnsen. 1. Economic Geology Research Centre (EGRU), James Cook University, Townsville, Queensland 4814, Australia. Search for other works by this author on:


Finally, the relatively water-rich and fertile nature of arc magma of the Tulasu district indicates high exploration potential for significant porphyry Cu-Au deposits. The existing alteration-immobile fertility proxy (V/Sc) for intrusive rocks may also be useful to assess the fertility of cogenetic volcanic rocks, in turn with implications for ...


The Middle Miocene Cu-Au deposits exsolution and concentration of volatiles in the roof formed in the principal magmatic arc synchronous with a zones of granitoids across the spectrum of magmatic- belt of world-class Sn-Ag deposits, which developed in a hydrothermal ore deposits, from Sn-W to Cu-Au systems back-arc setting in Bolivia (Fig. 1).


The Cretaceous-Tertiary host rocks comprise volcanic agglomerate and andesitic breccias and tuffs interbedded with clas-Chapter 11-1 · Epithermal Au-Ag-Cu, porphyry Cu-(Au-Mo) and Cu-Au-Ag-Zn-Pb skarn deposits of the Gangdese Arc, Tibet tic sedimentary rocks that are intruded by a diorite porphyry.


2017-4-28 · lithospheric accretion and Cenozoic tectonic reactivation with Au-Cu mineralization at its margin (Fig. 1). It is therefore an ideal place to study Au-rich systems at cratonic edges. The remnants of 1000–740 Ma volu-minous arc plutons and volcanic rocks in the western part of the craton


2019-5-8 · chemistry of subvolcanic rocks associated with porphyry Cu ± Au deposits (Cocker et al. 2015; Hao et al. 2017; Lowczak et al. 2018) have suggested that the relative timing of fluid and sulfide saturation plays an important role in the formation of porphyry Cu ± Au deposits. These studies used PGEs to indicate chalcophile element


2021-6-30 · Magma fertility; Regional metallogenesis; ... and Dirks, P.H.G.M., 2021, Copper-gold fertility of arc volcanic rocks – A case study from the Early Permian Lizzie Creek Volcanic Group, NE Queensland ... and Hollings, P., 2017, Geology and Genesis of the Cerro la Mina Porphyry-High Sulfidation Au (Cu …


Fertility Related to Cu-Au and U-REE Mineralisation in the Mary Kathleen Domain, Mt Isa Inlier. ... and metasomatic rocks in the Mary Kathleen Syncline, and Mary Kathleen, Elaine Dorothy, Mt Colin deposits 2) October 2018: granitoids, pegmatite, diorite, mafic dykes and gabbro of the ... (volcanic-arc granites), ORG (ocean-ridge granites), WPG ...


Our approach applies proposed Cu-Au fertility concepts for causative porphyry intrusions to volcanic rocks [1]. Sr/Y and V/Sc ratios of samples from the Mt. Carlton district fall within the favorable range of proposed Cu fertility concepts; the samples distal to mineralisation fall outside these fertility ranges.


Abstract Four economic porphyry Cu–Au deposits and several prospects have been investigated in the Northparkes district, part of the Ordovician to early Silurian Junee–Narromine Belt of the Macquarie Arc, New whole-rock geochemical data from the Northparkes porphyry Cu–Au district, NSW, indicate that the mineralising intrusive complexes exhibit distinct arc signatures that are ...


DESCRIPTIVE MODEL OF PORPHYRY Cu-Au. By Dennis P. Cox. DESCRIPTION Stockwork veinlets of chalcopyrite, bornite, and magnetite in porphyritic intrusions and coeval volcanic rocks. Ratio of Au (ppm) to Mo (percent) is greater than 30 (see fig. 77). Figure 77. Cartoon cross section of porphyry Cu-Au deposit. Modified from Langton and Williams ...


Evolution of the Hazelton arc near Terrace, British Columbia: stratigraphic, geochronological, and geochemical constraints on a Late Triassic - Early Jurassic arc and Cu-Au porphyry belt Mesozoic magmatism and timing of epigenetic Pb-Zn-Ag mineralization in the western Fortymile mining district, east-central Alaska: Zircon U-Pb geochronology ...


The Cabacal Deposit is located in the southern part of the Amazonian Craton (Brazil). It is hosted within the felsic volcanic and volcanoclastic rocks of the Proterozoic Alto Jauru Greenstone Belt.;The processes leading to the deposit are under debate. Some consider the Cabacal Deposit to be of shear-related origin, whereas some interpreted it to be a syngenetic deposit.


2021-5-25 · 1 Introduction. Subduction-associated plate boundaries are unstable and their location, structure, and morphology depend on factors such as rates of convergence and subduction, dip of the subducting slab, or subduction of volcanic chains or ridges (e.g., Cross & Pilger, 1982; Royden, 1993).The upper plate may be eroded, which leads to landward-directed migration of the arc …


2018-11-25 · The here presented results help to understand Cu- Au fertility on a regional, magmatic arc terrane (both volcanic and intrusive) from initial lower crustal petrological processes to the surface, but also on a local scalewithin confined individual igneous bodies, their ; respective mineral assemblages, and their potential role towards regionally present CuAu - mineralisation.


2020-1-9 · Finally, the relatively water-rich and fertile nature of arc magma of the Tulasu district indicates high exploration potential for significant porphyry Cu-Au deposits. The existing alteration-immobile fertility proxy (V/Sc) for intrusive rocks may also be useful to assess the fertility of cogenetic volcanic rocks, in turn with implications for unexposed porphyry Cu deposits at depths.


2016-11-2 · Chagai magmatic arc in the east Siddiqui (2004). The Baluchistan (or Makran) magmatic arc, is an east-west trending, ~500 km long and up to 140 km wide belt of calc-alkaline plutonic, volcanic, and sedimentary rocks, which is part of the


Early sulfide saturation in arc volcanic rocks of southeast China: Implications for the formation of co-magmatic porphyry-epithermal Cu-Au deposits TEXT SIZE: A A A It is widely considered that arc magmas are highly oxidized, and can thus dissolve a large amount of sulfur, thereby preventing significant sulfide saturation prior to fluid saturation.


2020-7-1 · Release of Au, Cu, and S to ore-forming aqueous fluids by dissolution of early formed sulfides is a more plausible mechanism for the generation of a giant porphyry-epithermal Cu–Au deposit. The arc volcanic rocks co-magmatic with the porphyry–epithermal deposits became saturated and segregated large amounts of sulfides before the magmas were erupted.


2013-3-6 · Geological setting of Late Triassic porphyry Cu-Au mineralization at the Dillard Creek property near Merritt, southern British Columbia Mitchell G. Mihalynuk1,a and James M. Logan1 1 British Columbia Geological Survey, Ministry of Energy, Mines and Natural Gas, Victoria, BC, V8W 9N3 a corresponding author: [email protected] Recommended citation: Mihalynuk, Mitchell G. …


2018-11-2 · Geochronology and geochemistry of volcanic rocks from the Shaojiwa Formation and Xingzi Group, Lushan area, SE China: Implications for Neoproterozoic back-arc basin in the Yangtze Block. Precambrian Research 238, 1–17.


2018-9-30 · Cu–Au deposit (Li et al., 2011b, 2012, 2013). The ~118–120 Ma barren and fresh granodiorite porphyry also intruded into the Middle Jurassic QuseGroup(Lietal.,2011b,2013).The~143MaEarlyCretaceousbasalts are pre-ore volcanic rocks, with OIB (ocean island basalts) affinities (Li et al., 2013). Syn- and post-ore Cretaceous volcanic rocks (Fig ...


Jurassic arc magmatic rocks are widely distributed along the Gangdese belt, southern Tibet, however, only one Jurassic arc-related porphyry Cu deposit (the Xietongmen deposit) has been found. The Jurassic arc magma fertility needs to be further constrained in order to understand the rarity of arc-related porphyry Cu deposits in this belt.


2021-7-20 · Altered volcanic rocks is designed to be a practical guide for systematically describing and interpreting altered volcanic rocks, and determining their significance in terms of mineral deposit prospectivity. ... are also provided for porphyry Cu-Au, Fe-oxide Cu-Au, Sediment-hosted Pb-Zn and Carlin-type Au deposits. ... published by CODES ARC ...


2016-9-29 · Our approach applies proposed Cu-Au fertility concepts for causative porphyry intrusions to volcanic rocks [1]. Sr/Y and V/Sc ratios of samples from the Mt. Carlton istrictd fall within the favorable range of proposed Cu fertility concepts; the samples distal to mineralisation fall outside these fertility ranges. La/Yb and Dy/Yb ratios of Mt. Carlton


2020-6-9 · The Huangtan Au-Cu deposit is was recently discovered in the Kalatag district, Xinjiang, NW Chin a. It is one of the few Early Paleozoic volcanic massive sulfide (VMS) deposits in the East Tianshan. The deposit is predominantly hosted by Early Paleozoic volcanic rocks and quartz diorite pluton.


2021-5-17 · Copper – Macquarie Arc Cu‒Au (Mo Re) Copper – Cobar Cu Au. Magmatic fertility studies. New magmatic fertility parameters now available for western Lachlan magmatic rocks in the latest NSW ... • Magmatic fertility mapping: new release for central Lachlan in NSW Seamless Geology 2.1


2021-7-23 · The main porphyry-epithermal province in Australia is the Siluro-Ordovician Macquarie Arc in New South Wales, which contains major porphyry Cu-Au deposits at Cadia (global resource of 1.31 Gt at 0.31% Cu and 0.74 g/t Au: Cooke et al., 2007) and Northparkes (global resource of 153 Mt at 1.03% Cu and 0.46 g/t Au…


2021-4-13 · Geological setting. The Haib deposit is hosted mainly by the high-K calc-alkaline intrusions of the Vioolsdrif Suite and subaerial volcanic rocks of the Orange River Group along the western part ...


2020-6-15 · We have also plotted PGE data for volcanic rocks from two modern seafloor Cu–Au SMS deposits at arc-related settings: Pual Ridge (PACMANUS hydrothermal field), Eastern Manus Basin, and the Niuatahi-Motutahi, Tonga rear arc, for comparison (Binns and Scott 1993; Kim et al. 2011; Berkenbosch et al. 2015; Park et al. 2013, 2015).


In this region nine deposits have been discovered in recent years. These deposits occur in Paleozoic volcanic rocks between the Kalatag Fault and Kabei Fault, and can be divided into six mineral systems, i.e., VMS Cu-Zn, epithermal Cu, porphyry Cu-Au, skarn Fe-Cu, magmatic Cu-Ni sulfide and hydrothermally overprinted deposits.


Abstract It is widely considered that arc magmas are highly oxidized, and can thus dissolve a large amount of sulfur, thereby preventing significant sulfide saturation prior to fluid saturation. Therefore, chalcophile metals (e.g., Cu and Au) are retained in the magma and finally extracted by exsolved hydrothermal fluids. To test this hypothesis, we analyzed the abundances of platinum-group ...


By contrast volcanic samples from the mineralised district (Mt Carlton epithermal and porphyry deposits) cover the full range of compositions from andesite to rhyolite. Distinct differences in whole-rock geochemistry can be particularly observed in TiO2, Sr/Y, V/Sc and REE element composition.\ud Our approach applies proposed Cu-Au fertility concepts for causative porphyry intrusions to volcanic rocks …


2021-4-13 · Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas derived from partial melting of the ...


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