Trace element concentrations in porphyry copper deposits from Metaliferi Mountains, Romania: A reconnaissance study

Cioacă, Mihaela Elena; Munteanu, Marian; Qi, Liang; Costin, Gelu

doi:10.1016/j.oregeorev.2014.04.016

Cited by 43 publications

(28 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…En ar gite/luzonite-famatinite oc cur rences in Ro ma nia are mi nor. Sev eral ex am ples are known from the Apuseni Mountains in com pat i ble well-doc u mented ore de posit en vi ron ments, e.g., the Prul lui Avram HS de posit (Socolescu et al, 1963), the Roêia Poieni Cu-Au por phyry and over print ing HS veins, and HS veins over print ing Bucium-Tarniïa Cu-Au por phyry (Cioacã et al, 2014). En ar gite, famatinite and luzonite are only briefly men tioned in the Baia Mare met al lo gen ic dis trict (cf.…”

Section: Discussionmentioning

confidence: 99%

Cu3(As,Sb)S4 minerals from the Baia Mare metallogenic district, Eastern Carpathians, Romania – a case study from the Cisma ore deposit

Kovács

Tămaş

2020

View full text Add to dashboard Cite

2 Vic tor Gorduza County Min er al og i cal Mu seum of Baia Mare, 8 Traian bou le vard, 430212 Baia Mare, Ro ma nia Kovács, R., Tãmaê, C.G., 2020. Cu 3 (As,Sb)S 4 min er als from the Baia Mare met al lo gen ic dis trict, East ern Carpathians, Roma nia -a case study from the Cisma ore de posit. Geo log i cal Quar terly, 64 (2): 263-274, doi: 10.7306/gq.1529 As so ci ate Ed i tor: S³awomir OszczepalskiThe oc cur rence of Cu 3 (As,Sb)S 4 min er als, i.e. the en ar gite and luzonite-famatinite se ries, is poorly known in the Neo gene Baia Mare met al lo gen ic dis trict, NW Ro ma nia, with few re cords and no an a lyt i cal data. This study pro vides the first EPMA and XRD data on en ar gite/luzonite from the Baia Mare met al lo gen ic dis trict, i.e. the Cisma ore de posit from the Bãiuï met allo gen ic field, and the Herja ore de posit. Vein-type ore bod ies bear ing Cu 3 (As,Sb)S 4 min er als from Cisma are hosted by Paleocene-Eocene flysch suc ces sions, while the host rock of the en ar gite-bear ing ore from Herja is un known. The en ar gite and luzonite-famatinite se ries are known as "ex otic" in low sulphidation epi ther mal ore de pos its, "typ i cal" in high sulphidation epi ther mal de pos its in as so ci a tion with ten nan tite, and "some times com mon" in small amounts in in ter me di ate sulphidation epi ther mal ore de pos its. The oc cur rence of en ar gite/luzonite in the Baia Mare dis trict sug gests the need to up date the met allo gen ic in ter pre ta tion for sev eral ore de pos its, partly at the dis trict scale in re la tion to other ore de posit/min er al ogy fea tures, e.g. vug gy sil ica, hypogene argillic al ter ation.

show abstract

Section: Discussionmentioning

confidence: 99%

Cu3(As,Sb)S4 minerals from the Baia Mare metallogenic district, Eastern Carpathians, Romania – a case study from the Cisma ore deposit

Kovács

Tămaş

2020

View full text Add to dashboard Cite

show abstract

“…It is a major constituent of mineralization in ore deposits such as magmatic copper-nickel, porphyry copper, iron oxide-copper gold (IOCG), skarn, epithermal gold-silver, volcanogenic massive sulfide (VMS), and sedimentary rock-hosted copper, among others [1][2][3][4][5][6][7]. In the past decades, several micro-analytical studies have shown that chalcopyrite can host significant amounts of trace metals, most notably Ag, which is commonly recovered as a by-product of Cu mining [8][9][10][11][12][13][14][15][16][17][18][19]. Typically, Ag concentrations in chalcopyrite range between tens and hundreds of parts per million (ppm), although sometimes reaching a few thousand ppm [16,19].…”

Section: Introductionmentioning

confidence: 99%

Silver-Rich Chalcopyrite from the Active Cerro Pabellón Geothermal System, Northern Chile

et al. 2020

View full text Add to dashboard Cite

Active subaerial geothermal systems are regarded as modern analogues of low- to intermediate-sulfidation epithermal Au–Ag deposits, where minor amounts of Cu are mostly present as chalcopyrite. Although trace element data concerning sulfides are scarce in active geothermal systems at convergent settings, studies in several other environments have demonstrated that chalcopyrite is a relevant host of Ag and other trace elements. Here, we focus on the active Cerro Pabellón geothermal system in the Altiplano of northern Chile, where chalcopyrite-bearing samples were retrieved from a 561 m drill core that crosscuts the high-enthalpy geothermal reservoir at depth. A combination of EMPA and LA-ICP-MS data shows that chalcopyrite from Cerro Pabellón is silver-rich (Ag > 1000 ppm) and hosts a wide range of trace elements, most notably Se, Te, Zn, Sb, As, and Ni, which can reach 100 s of ppm. Other elements detected include Co, Pb, Cr, Ga, Ge, Sn, Cd, and Hg but are often present in low concentrations (<100 ppm), whereas Au, Bi, Tl, and In are generally below 1 ppm. Chalcopyrite shows a distinct geochemical signature with depth, with significantly higher Ag concentrations in the shallow sample (494 m) and increasing Cd and In contents towards the bottom of the studied drill core (549 m). These differences in the trace element contents of chalcopyrite are interpreted as related to temperature gradients during the waning stages of boiling at Cerro Pabellón, although further studies are still needed to assess the precise partitioning controls. Our data provide evidence that chalcopyrite may play a relevant role as a scavenger of certain metals and a monitor of fluid changes in hydrothermal systems.

show abstract

“…Muratdere has similar Ag, Sb, Zn, and Bi concentrations as pyrite samples from other porphyry deposits that have undergone sulfide trace element analysis (Reich et al, 2013;Cioacǎ et al, 2014;Zhang et al, 2016;Sykora et al, 2018;Zarasvandi et al, 2018). Pyrite samples from the Dexing and Jinchang porphyry deposits, China, the Lihir porphyry-epithermal deposit, Papau New Guinea, and the Muratdere deposit contain relatively similar Au and Te concentrations (<1 ppm), in contrast to pyrite samples from porphyry deposits in the Metaliferi Mountains, Romania, and the Urumieh-Dokhtar arc, Iran, which contain significantly more Te (mean 89 and 47 ppm) and Au (mean 168 and 145 ppm) than pyrite from other porphyry deposits (Cioacǎ et al, 2014;Zarasvandi et al, 2018). Pyrite samples analyzed by LA-ICP-MS from the Jinchang porphyry deposit, China, have Ni and As concentrations similar to those of Muratdere pyrite samples, but with slightly more Co (mean 949 ppm) and an order of magnitude less Se present (mean 2 ppm) (Zhang et al, 2016).…”

Section: Trace Elements In Pyritementioning

confidence: 99%

“…V-CDT = Vienna-Canyon Diablo Troilite. Reich et al, 2013;Cioacǎ et al, 2014;Zhang et al, 2016;Sykora et al, 2018;Zarasvandi et al, 2018). A) Au against As in global porphyry pyrite samples (where both are above detection limit).…”

Section: Trace Elements In Molybdenitementioning

confidence: 99%

Rhenium Enrichment in the Muratdere Cu-Mo (Au-Re) Porphyry Deposit, Turkey: Evidence from Stable Isotope Analyses (δ34S, δ18O, δD) and Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Analysis of Sulfides

et al. 2019

View full text Add to dashboard Cite

The Muratdere Cu-Mo (Au) porphyry deposit in western Turkey contains elevated levels of rhenium and is hosted within granodioritic intrusions into an ophiolitic mélange sequence in the Anatolian belt. The deposit contains several stages of mineralization: early microfracture-hosted molybdenite and chalcopyrite, followed by a quartz-pyrite-chalcopyrite vein set associated with Cu-Au grade, a quartz-chalcopyrite-pyrite-molybdenite vein set associated with Cu-Mo-Re grade, and a later polymetallic quartz-barite-sphalerite-galena-pyrite vein set. The rhenium in Muratdere is hosted within two generations of molybdenite: early microfracture-hosted molybdenite and later vein-hosted molybdenite. In situ laser ablation-inductively coupled plasma-mass spectrometry analysis of sulfides shows that the later molybdenite has significantly higher concentrations of Re (average 1,124 ppm, σ = 730 ppm, n = 43) than the early microfracture-hosted molybdenite (average 566 ppm, σ = 423 ppm, n = 28). Pyrite crystals associated with the Re-rich molybdenite have higher Co and As concentrations than those in other vein sets, with Au associated with As. The microfracture-hosted sulfides have δ34S values between −2.2‰ and +4.6‰, consistent with a magmatic source. The vein-hosted sulfides associated with the high-Re molybdenite have a δ34S signature of 5.6‰ to 8.8‰, similar to values found in peridotite lenses in the Anatolian belt. The later enrichment in Re and δ34S-enriched S may be sourced from the surrounding ophiolitic country rock or may be the result of changing redox conditions during deposit formation.

show abstract

Trace element concentrations in porphyry copper deposits from Metaliferi Mountains, Romania: A reconnaissance study

Cited by 43 publications

References 58 publications

Cu3(As,Sb)S4 minerals from the Baia Mare metallogenic district, Eastern Carpathians, Romania – a case study from the Cisma ore deposit

Cu3(As,Sb)S4 minerals from the Baia Mare metallogenic district, Eastern Carpathians, Romania – a case study from the Cisma ore deposit

Silver-Rich Chalcopyrite from the Active Cerro Pabellón Geothermal System, Northern Chile

Rhenium Enrichment in the Muratdere Cu-Mo (Au-Re) Porphyry Deposit, Turkey: Evidence from Stable Isotope Analyses (δ34S, δ18O, δD) and Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Analysis of Sulfides

Contact Info

Product

Resources

About