There are six distinct classes of gold deposits each represented by metallogenic provinces having 100 s to >1000 tonne gold production The deposit classes are 1 orogenic gold; 2 Carlin and Carlin like gold deposits; 3 epithermal gold silver deposits; 4 copper gold porphyry deposits; 5 iron oxide copper gold deposits; and 6 gold rich volcanic hosted massive sulfide
Ore deposits Hydrothermal alteration Petrophysics Effective porosity Rapid volumetric saturation Constant saturation ABSTRACT Geological setting of one of the world famous silver gold deposits type is presented The silver gold vein system occurs in the southeastern portion of the Sierra de Guanajuato which is a 100km long N45°W trending
The genetic types of the ore deposits are comprehensively constrained by the deposit geology tectonic setting ore fluid temperature and salinity and multiple systems of isotopes including D O C S Pb He Ar for both fluid and the gangue and ore minerals 2004 is used to discuss the tectonic settings of the gold
Age sediment source and tectonic setting of the ore hosted Jinwozi Formation at the Jinwozi gold deposit in Beishan Orogen NW China Evidence from detrital zircon U Pb ages and Lu Hf isotopes
The gold ore bodies are mainly hosted in shear structures as auriferous quartz veins and in the upper Devonian Luohansi Formation as disseminated ores The genesis and geodynamic setting of both granitoids and gold mineralization has been vigorously debated among scholars worldwide Zhang et al 1984 Zhang et al 2001a Mao et al 2002
The Phu Kham copper gold deposit is in the Lao People s Democratic Republic The name translates literally as "Mountain of Gold The deposit includes distal sulphicle skarn proximal silicate
Our results show the presence of an early native gold dominated and a late gold silver telluride dominated mineralization stage The early stage gold mineralization was genetically linked to the Middle Late Permian aplite LA ICP MS zircon U Pb age ± Ma whose ages are similar to the gold ore veins sericite Ar Ar age
The fact that the number of gold grains in a set of gold mass fractions in an ore follow a Poisson distribution can be used to calculate the so called characteristic function for the sampling distribution of the ore and this function can be inverted to provide the probability density function This capability is a new tool in sampling theory
Although giant and supergiant gold ore deposits are extrememly rare they are one of the most profitable targets in global gold exploration and research Kerrich et al 2000 Cooke et al 2005 Leahy et al 2005 Richards 2013 Sanislav et al 2015 Groves et al 2016 Fougerouse et al 2017 Goldfarb et al 2017 Therefore understanding how they are
Ore minerals are naturally occurring minerals that contain valuable elements or minerals in sufficient quantities to be economically mined and processed for their desired metal or mineral content These minerals are typically extracted from the Earth s crust and processed to obtain the valuable elements or minerals for various industrial manufacturing and commercial
Citation XU Cheng SONG WenLei QI Liang WANG LinJun Geochemical characteristics and tectonic setting of ore bearing carbonatites in Hunglongpu Mo ore field[J] Acta Petrologica Sinica 2009 25 2 422 430
The ca 230 Ma gold mineralization in the Fengtai Basin Western Qinling orogen and its implications for ore genesis and geodynamic setting A case study of the Matigou gold Ore Geology Reviews IF Date 2021 08 06 DOI
The model explains the geological setting ore characteristics metallogenic zoning and ore forming processes of the deposits in the Beiya area It provides useful insights for further mineral exploration in the Jinshajiang Ailaoshan province for porphyry and skarn Cu Mo Au ore systems associated with alkaline magmatism and may also be
Lode gold deposits are among the most economically important types of gold deposits in the world Globally they formed mainly in three time intervals to Ga to Ga and 700 Ma to the present Sources of ore forming fluids and other components are of critical importance in a better understanding of the genesis and the geodynamic controls of these
Three major ore zones denoted I II and III have been identified and the ore zone I is the largest Gold mineralization in the ore zone I is hosted in altered spilite in the Dsh 1c trending NW for more than 2 km with a greater vertical extension than lateral extension and with north dipping angles of 55 65° The major ore minerals are
The Beiya gold polymetallic deposit is one of the largest gold deposits in China and is considered to be a typical porphyry skarn system located in the middle of the Jinshajiang Ailaoshan alkaline porphyry metallogenic belt Massive magnetite is widespread in the Beiya ore district but its genesis is still the subject of debate
Citation XU Cheng SONG WenLei QI Liang WANG LinJun Geochemical characteristics and tectonic setting of ore bearing carbonatites in Hunglongpu Mo ore field[J] Acta Petrologica Sinica 2009 25 2 422 430
The native gold from the Bystraya River catchment can be divided into 3 types and 1 subtype 1 Cu bearing gold grains with a fineness of 800 − 995‰ and a copper impurity of up to %; 2
Jiaodong area is the only Late Mesozoic giant gold province hosted in a Precambrian metamorphic terrane in the world The metallogenic system of Jiaodong gold province is unique with the following distinctive features 1 It is situated in an
The Bilihe gold deposit has been explored for Au mineralization since 1958; it has metal reserves of t with an ore grade of % Au Ge et al 2009 The Hadamiao gold deposit is located approximately 12 km southeast of the Bilihe gold deposit
This takes on many forms depending on the nature of an ore deposit The Mponeng Gold Mine Figure southwest of Johannesburg South Africa is the deepest mine in the world Its deepest workings are more than km below Earth s surface Figure shows the mine buildings on the surface; the tall towers are head frames where lifts
Available fluid inclusion data from Jales Penedono Castromil and Limarinho gold bearing quartz sulfide veins reveal both metamorphic and meteoric fluids but gold was mainly introduced during a meteoric fluids late influx Noronha et al 2000 Boiron et al 2003 Vallance et al 2003 One of the primary controls on gold mineralization in the Iberian deposits
The Geological Setting Mineralogy and Paragenesis of Gold Bearing Polymetallic Cu Co Ag Au Bi±Pb±Ni±U Veins of the Merico Ethel Property Elk Lake Northeastern Ontario Canada of the Nipissing diabase The ore mineralogy is complex in character typically comprising sulfides arsenides native metals gold and silver and specular
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