Mineralogical, Petrological, Stable Isotope, and Fluid Inclusion Characteristics of the Tuvatu Gold-Silver Telluride Deposit, Fiji: Comparisons with the Emperor Deposit

Scherbarth, N. L.

doi:10.2113/101.1.135

Cited by 8 publications

(12 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whereas the REE and trace element patterns here are different from those reported for other porphyry-epithermal systems (e.g. Tuvatu, Scherbarth and Spry, 2006;Emperor, Eaton and Setterfield, 1994), they are broadly similar to other igneous systems in the Aegean, which suggests a common regional-scale process that led to elemental enrichment and depletion with, local-scale differences in petrogenetic processes (Pe-Piper et al, 2009).…”

Section: Mineralogy and Petrochemistry Of Rocks At Fakoscontrasting

confidence: 99%

“…The general shape of the REE patterns is similar to those of alkaline intrusive rocks at Tuvatu and Ladolam as well as the Porgera gold deposit, Papua New Guinea; however, the rocks at Fakos are enriched in light REE relative to those at the other locations (Scherbarth and Spry, 2006;Richards, 1990;Lottermoser, 1990;Müller et al, 2002;Pe-Piper et al, 2009). Trace element discrimination (spider) diagrams of the same rocks demonstrate a distinctly different pattern when compared to those obtained from alkaline intrusive rocks at Tuvatu (Scherbarth and Spry, 2006), Emperor (Setterfield, 1991), and Porgera (Richards et al, 1990) (Fig. 11).…”

Section: Mineralogy and Petrochemistry Of Rocks At Fakosmentioning

confidence: 53%

“…United States (Setterfield, 1991;Setterfield et al, 1991;Eaton and Setterfield, 1993;Spry et al, 1996;Müller et al, 2001;Müller et al, 2002;Scherbarth and Spry, 2006) ( Fig. 8).…”

Section: Mineralogy and Petrochemistry Of Rocks At Fakosmentioning

confidence: 99%

See 2 more Smart Citations

Mineralogical, petrological, stable isotope, and fluid inclusion studies of the Palea Kavala reduced intrusion-related and the transitional Fakos porphyry Cu-Mo to epithermal Au-Te ore systems

Fornadel

View full text Add to dashboard Cite

Reduced intrusion-related gold systems are generally characterized by a Au-BiTe -W metal assemblage genetically linked to the emplacement of granitoids. The Palea Kavala ore system, Greece, consists of ~150 minor Fe-Mn (Pb±Zn±Ag), Fe-Mn-Au, Fe-As-Au, Fe-Cu-Au, and BiTe -Au ore occurrences that occur primarily in quartz-calcite-sulfide veins (hypogene mineralization), or as supergene bodies, in overlapping zones centered on the ~21-22 Ma granodioritic Kavala pluton, which intrudes metamorphic rocks of the Paleozoic Rhodope metamorphic core complex. The pluton consists mostly of granodiorite with lesser amounts of diorite, tonalite and monzodiorite, which was emplaced along the regional E-W trending Kavala-Komotini fault. The recently discovered, ~4 km long, E-W trending so-called Kavala vein is a sheeted quartz vein system of BiTe -Pb-Sb±Au mineralization that crosscuts the Kavala pluton and the schists and gneisses of the Rhodope Massif. The Kavala vein system is comprised of quartz with lesser amounts of K-feldspar, plagioclase, and muscovite. Quartz-sericite-pyrite alteration is pervasive but minor kaolinite is also present. Pyrite (~5% of vein volume) contains inclusions of tetradymite (some gold-bearing), bismuthinite, and cosalite. Sulfur isotope values (n = 27) of pyrite from the Kavala and Chalkero veins, as well as pyrite and 5 galena from Garizo Hill Fe-Mn-Pb vein range from-1.9 to 1.0 per mil (with one outlier of-4.6 per mil) and suggest a magmatic sulfur source. Homogenization temperatures (T h) of type I (two-phase aqueous liquid-vapor) and type II (three-phase, H 2 O-CO 2-rich) fluid inclusions that homogenize into the liquid phase in quartz from the Kavala and Chalkero veins range from 216.0º to 420.0ºC (n = 216) and 255.7 º to 414.0 ºC (n = 112), respectively. The T h of type III (two-phase aqueous liquid-vapor), which homogenize into the vapor phase, ranges from 210.4 o to 323.4 o C (n = 28). The salinities of type I and type II inclusions range from 15.9 to 22.6 wt. % NaCl equiv. and 5.5 to 11.2 wt. % NaCl equiv., respectively. Eutectic temperatures of-58.5 o to-44.3 o C for type I inclusions suggest the presence of appreciable CaCl 2 in addition to NaCl. Clathrate melting temperatures for type II inclusions of ~-56.7 o C indicate that CO 2 is the major component of the gaseous phase. The presence of a zoned metallogenetic district centered on BiTe -Pb-Sb±Au mineralization within the Kavala pluton and the two high-temperature, high-salinity, immiscible carbonic and aqueous fluids associated with the Kavala and Chalkero veins are consistent with them being part of a reduced intrusion-related gold system.

show abstract

Section: Mineralogy and Petrochemistry Of Rocks At Fakoscontrasting

confidence: 99%

Section: Mineralogy and Petrochemistry Of Rocks At Fakosmentioning

confidence: 53%

See 1 more Smart Citation

Mineralogical, petrological, stable isotope, and fluid inclusion studies of the Palea Kavala reduced intrusion-related and the transitional Fakos porphyry Cu-Mo to epithermal Au-Te ore systems

Fornadel

View full text Add to dashboard Cite

show abstract

“…The three major epithermal gold deposits of Fiji lie along the lineament. The low-sulfidation epithermal gold deposits at Emperor and Tuvatu on Viti Levu are related to monzonite intrusions that host low-grade porphyry copper systems; the high-sulfidation epithermal Mount Kasi deposit on Vanua Levu is not known to be associated with a porphyry system (Scherbarth and Spry, 2006).…”

Section: Fijimentioning

confidence: 99%

Porphyry copper assessment of Southeast Asia and Melanesia: Chapter D in <i>Global mineral resource assessment</i>

Hammarstrom¹,

Bookstrom²,

Dicken³

et al. 2013

Scientific Investigations Report

View full text Add to dashboard Cite

“…Experimental studies have showed that magnesium has the capacity to increase the rate of hydrogen dissociation, slow down its adsorption kinetics, and lead hydrogen-bearing gases to condense (Swartz et al 1999). This hypothesis is supported by the presence of magnesium minerals in the most studied Ag-Au-Te ore deposits such as: dolomite-talc-brucite (Panormos Bay; Tombros et al 2004Tombros et al , 2005Tombros et al , 2007, Mg-chlorite (Acupan; Cooke et al 1996;Cooke and McPhail (2001), dolomite (Cripple Creek; Thompson et al 1985;Kelley et al 1998), dolomite and Mg-chlorite (Emperor, Tuvatu; Ahmad et al 1987;Scherbarth and Spry 2006), roscoelite and dolomite (Porgera; Richards and Kerrich 1993;Ronacher et al 2004) and Mg-chlorite and manganese ores (Sunnyside mine; Casadevall and Ohmoto 1977).…”

mentioning

confidence: 99%

Later stages of evolution of an epithermal system: Au–Ag mineralizations at Apigania Bay, Tinos Island, Cyclades, Hellas, Greece

et al. 2008

View full text Add to dashboard Cite

Precious metals accompany all types of epithermal deposits. In general, the largest of these deposits occur in intrusive or extrusive rocks of alkaline or calc-alkaline affinity. The Apigania Bay vein system and Au-Ag mineralization is hosted in Mesozoic marbles and schists, and is composed primarily of five nearly parallel, high-angle quartz veins that extend for at least 200 m. Gold-silver mineralization, in association with more than thirty ore and vein minerals, is developed in three stages and occurs at the contact of marbles and schists. Zones of epidote-chlorite-calcite and sericite-albite alteration are associated with precious metal-bearing milky and clear quartz veins. Fluid inclusion studies suggest that hydrothermal mineralization was deposited under hydrostatic pressures of~100 bars, at temperature of 120-235°C, from low to moderate, calcium-bearing, saline fluids of 0.2 to 6.8 equiv. wt.% NaCl. Calculated isotope compositions (δ 18 O=−4.7‰ to 1.7‰ and δD= −120‰ to −80‰) for waters in equilibrium with milky and clear quartz are consistent with mixing with dilute, low temperature meteoric ore fluids. Calculated δ 13 C CO2 (0.6‰ to 1.1‰) and δ 34 S H2S (−7.3 to −0.3‰) compositions of the ore fluids indicate exchange, in an open system, with a metasedimentary source. Gold and silver deposition was associated with degassing of hydrogen due to intense uplift of the mineralizing area. The physicochemical conditions of mineralization stages I to III range between 200°C and 150°C, f S 2 ¼ 10

show abstract

Mineralogical, Petrological, Stable Isotope, and Fluid Inclusion Characteristics of the Tuvatu Gold-Silver Telluride Deposit, Fiji: Comparisons with the Emperor Deposit

Cited by 8 publications

References 0 publications

Mineralogical, petrological, stable isotope, and fluid inclusion studies of the Palea Kavala reduced intrusion-related and the transitional Fakos porphyry Cu-Mo to epithermal Au-Te ore systems

Mineralogical, petrological, stable isotope, and fluid inclusion studies of the Palea Kavala reduced intrusion-related and the transitional Fakos porphyry Cu-Mo to epithermal Au-Te ore systems

Porphyry copper assessment of Southeast Asia and Melanesia: Chapter D in <i>Global mineral resource assessment</i>

Later stages of evolution of an epithermal system: Au–Ag mineralizations at Apigania Bay, Tinos Island, Cyclades, Hellas, Greece

Contact Info

Product

Resources

About