Fluid Inclusion Evidence From The Composite Vhms And Lode Gold Deposits At Mt Gibson Western Australia
DOWNLOAD
Download Fluid Inclusion Evidence From The Composite Vhms And Lode Gold Deposits At Mt Gibson Western Australia PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Fluid Inclusion Evidence From The Composite Vhms And Lode Gold Deposits At Mt Gibson Western Australia book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Fluid Inclusion Evidence From The Composite Vhms And Lode Gold Deposits At Mt Gibson Western Australia
DOWNLOAD
Author : Kelley Teoline Straub
language : en
Publisher:
Release Date : 1997
Fluid Inclusion Evidence From The Composite Vhms And Lode Gold Deposits At Mt Gibson Western Australia written by Kelley Teoline Straub and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Overprinting Of A Vhms Style Event By Late Archaean Lode Gold Mineralisation At The Base Metal Rich Mount Gibson Gold Deposits Western Australia
DOWNLOAD
Author : Christopher J. Yeats
language : en
Publisher:
Release Date : 1996
Overprinting Of A Vhms Style Event By Late Archaean Lode Gold Mineralisation At The Base Metal Rich Mount Gibson Gold Deposits Western Australia written by Christopher J. Yeats and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Geology, Stratigraphic categories.
Fluid Inclusion Study Of The Archean Lode Gold Deposit At Paddington Western Australia
DOWNLOAD
Author : Timothy John Lee
language : en
Publisher:
Release Date : 1999
Fluid Inclusion Study Of The Archean Lode Gold Deposit At Paddington Western Australia written by Timothy John Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Fluid Inclusion Research
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1968
Fluid Inclusion Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Fluid inclusions categories.
Metamorphosed And Metamorphogenic Ore Deposits
DOWNLOAD
Author : Paul G. Spry
language : en
Publisher:
Release Date : 2000
Metamorphosed And Metamorphogenic Ore Deposits written by Paul G. Spry and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Metamorphic rocks categories.
Hydrothermal Evolution Of Two Stages Of Gold Mineralization At The Orogenic New Celebration Gold Deposit And Implications For Gold Mineralization Within The Kalgoorlie Kambalda Corridor Eastern Goldfields Province Western Australia
DOWNLOAD
Author : Joanna L. Hodge
language : en
Publisher:
Release Date : 2010
Hydrothermal Evolution Of Two Stages Of Gold Mineralization At The Orogenic New Celebration Gold Deposit And Implications For Gold Mineralization Within The Kalgoorlie Kambalda Corridor Eastern Goldfields Province Western Australia written by Joanna L. Hodge and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Gold categories.
[Truncated abstract] The Archean orogenic New Celebration gold deposit, located in the Kalgoorlie Terrane of the Eastern Goldfields Province, Western Australia, is hosted within the western segment of the first-order Boulder Lefroy fault zone (BLFZ). This setting contrasts with the majority of orogenic lode gold deposits worldwide, which are typically located in higher order splays, and as such, the New Celebration deposit provides a unique opportunity to study the hydrothermal, structural, alteration and fluid characteristics of a first-order crustal scale shear zone. Fluid inclusion, sulfur isotope and mineral chemistry were used to reconstruct the evolution of hydrothermal fluids within the BLFZ. Vein petrography, fluid inclusion microthermometry and laser ablation-inductively coupled plasma-mass spectrometry microanalysis (LA-ICP-MS) of single fluid inclusions, in addition to laser ablation sulfide sulfur isotope analyses and LA-ICP-MS mineral chemistry were combined to determine the pressure-temperaturecomposition evolution of the New Celebration gold deposit. At New Celebration, gold mineralization took place in two stages: Stage I, which is related to ductile, sinistral oblique slip fault movement and Stage II, which is related to brittle-ductile and brittle strike-slip fault movement. Type 2 quartz and quartzcalcite shear and extension veins concomitant with Stage I gold mineralization contain pseudo-secondary 2- and 3-phase aqueous-carbonic (10 ± 1 to 33 ± 13 mole % CO2) inclusions with salinities between 2 and 8 equiv. wt. percent NaCl, which were trapped between 330° and 390° C and 3.2 and 4.0 kbars. Mixed aqueous-carbonic inclusions (16 ± 3to 53 ± 28 mole % CO2) and aqueous”carbonic fluid (3 mole % CO2) inclusions with variable phase ratios and salinities of 1.9 ± 1.1to 8.7 ± 2.6 equiv. wt. percent NaCl in type 3 quartz-pyrite±sericite±calcite veins and quartz-calcite alteration associated with Stage II gold mineralization were trapped between 280° and 320° C and 0.8 to 3.2 kbars. Coexisting liquid- and vapor-rich inclusions within the same trail or cluster indicate these inclusions were trapped during phase separation. Secondary high-salinity (18.4 to 23.3 equiv. wt. % NaCl) aqueous inclusions, and metane inclusion, which postdated gold mineralization, were trapped in type 2 and type 3 veins between 100° C and 180° C and pressures below 1 kbar. Single inclusion laser ablation inductively coupled plasma mass spectrometry analyses on aqueous and aqueous-carbonic inclusions indicate that the Stage I gold related fluids were characteristically NaCa>K> Mg (K/Ca 1) whereas Stage II fluids are NaMg>K”Ca (K/Ca >1) and contained higher concentrations of, Pb, Zn, As, and W than Stage I fluids. Average Au concentrations from both Stage I and Stage II-related aqueous-carbonic inclusions returned values around 5 parts per million (ppm) although individual inclusions contained up to 51 ppm. Variations in metal ratios and elemental concentrations, in addition to K/Ca ratios potentially indicate different fluid sources for each mineralizing event and suggest that a switch occurred in fluid and/or metal sources between Stage I and Stage II...
Fluid Inclusions And Archean Lode Gold Sturgeon Lake Savant Lake Northwest Ontario
DOWNLOAD
Author : Paul K. Wetherbee
language : en
Publisher:
Release Date : 1988
Fluid Inclusions And Archean Lode Gold Sturgeon Lake Savant Lake Northwest Ontario written by Paul K. Wetherbee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
A Study Of Fluid Inclusions And Geochemical Mechanisms For Gold Deposition Cannon Mine Wenatchee Washington
DOWNLOAD
Author : Michael Peter Klisch
language : en
Publisher:
Release Date : 1989
A Study Of Fluid Inclusions And Geochemical Mechanisms For Gold Deposition Cannon Mine Wenatchee Washington written by Michael Peter Klisch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Fluid inclusions categories.
The Carmen Mine is located 1 km south of the city of Wenatchee, Washington. The mine is hosted by lower to middle Eocene fluvial arkoses of unknown correlation. An unaltered rhyodacite dome, dated at 43.2 ± 8 Ma, bordered by perlite, intrudes the sediments and is separated from the orebody by a zone of sheared and faulted sediments. The western border of the orebody is a brecciated and weakly altered and mineralized andesite of probable early Eocene age. The structural geology of the mine area is quite complex and related to the formation of the Chiwaukum graben during the middle Eocene. Hydrothermal alteration consists dominantly of pervasive silicification of the sediments. Argillically altered (chlorite+kaolinite+smectite) arkoses cap the silicified zones. Gold occurs in quartz-adularia-calcite veins which occupy 2 generations of fractures in the silicified zones. Ore minerals are pyrite, electrum, pyrargyrite, tetrahedrite, chalcopyrite, and acanthite. Gangue minerals are quartz, calcite, adularia, and clays. Post mineralization shearing has disrupted the silicified zones. Fluid inclusions were studied in quartz and calcite veins from the silicified zones. Fluid inclusions and textures of veins and wall rocks indicate that the fluid was boiling. Three types of fluid inclusions were identified in quartz: 2 phase, liquid-vapor, liquid rich, with variable degree of filling; 2 phase L-V, vapor rich; and 3 phase, liquid-vapor-solid. The most common are L-V, liquid rich, with homogenization temperatures ranging from 58° C to over 400° C. The mean homogenization temperature is 285° C, except in late-stage, low temperature quartz. Salinities are quite variable, ranging from 1.6 weight % to 23 wt. % NaCl equivalent, and averaging 8 wt. % NaCl equivalent. No microthermometry was performed on the vapor-rich inclusions due to their opaque nature, but their occurrence together with liquid-rich inclusions suggests the system was boiling. Rare L-V-S inclusions contain an unidentified solid phase. Ice melting temperatures as low as -33° C reveal a more complex system than NaCl-H20, possibly NaCl-(Ca, Mg)Cl2-H20. Calcite contains 2 phase, L-V inclusions with consistent degrees of filling. Homogenization temperatures range from 99° C to 220° C, averaging 185° C. Salinities range from 0.09 wt. % to 1.13 wt. % NaCl equiv., averaging 0.87 wt. %. Inclusions were decrepitated by stepwise heating. Following each step, leachates were analysed by ion chromatography, and the results applied to chemical geothermometers, widely applied to the investigation of active geothermal fields. The most common cations are Na+ and K+, with minor amounts of Ca2+, Mg2+, Li+, and NH4 +. The most common anion is S04 2-, with lesser amounts of Cl-. The sulfate probably represents original H2S, which was oxidized during sample preparation. The Na-Ca-K geothermometer gave results consistent with fluid inclusion geothermometry, while the Na-K geothermometers gave high but generally consistent results. The Na-Li geothermometer gave variable, unusable results. Thermochemical calculations and fluid inclusion results indicate that gold was transported as a gold-bisulfide (thio) complex rather than a gold-chloride complex, in dilute, high [Sigma]S/Cl- fluids. The hydrothermal fluids were probably undersaturated with respect to gold, and the gold content of the source rocks was the limiting factor in the amount of gold transported. Gold was probably precipitated as the ascending hydrothermal fluids encountered open space in the host rocks. The sudden drop in pressure allowed the fluids to devolatilize and boil, precipitating gold. Tectonic activity related to the formation of the Chiwaukum graben produced the fractures for the fluid to flow through. Magmatic activity coeval with graben formation provided a heat source for the circulation of the hydrothermal fluids. Hydrothermal activity and gold deposition took place in a near-surface environment similar to the boiling geothermal systems at The Geysers, California, and Broadlands, N.Z. Fluid inclusion evidence for boiling fluids with a high [Sigma]S/Cl- ratio may be an important, inexpensive exploration tool for similar types of gold deposits.
Gold Transporting Hydrothermal Fluids In The Earth S Crust
DOWNLOAD
Author : P.S. Garofalo
language : en
Publisher: Geological Society of London
Release Date : 2014-09-16
Gold Transporting Hydrothermal Fluids In The Earth S Crust written by P.S. Garofalo and has been published by Geological Society of London this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-16 with Science categories.
Hydrothermal ore deposits that are exploited for gold include both gold-only deposits, such as orogenic deposits, and gold-bearing examples of the common hydrothermal deposits types that are formed around upper-crustal magmatic centres, in particular porphyry and epithermal deposits. Fluid-inclusion data have shown that ore fluids of gold-only deposits are compositionally distinct compared to fluids of other deposit types. This Special Publication includes an up-to-date summary of thermodynamic parameters of aqueous Au species at high temperatures and pressures; a dataset of fluid inclusion properties and compositions from orogenic deposits of different parts of the world; several comprehensive case studies of different types of gold deposits and their fluids from USA, Brazil, Egypt, Slovakia and Bulgaria; and numerical modelling aimed to define key parameters that affect fluid flow and gold deposition at a range of scales.
Fluid Inclusions And Archean Lode Gold Lake Of The Woods Ontario Canada
DOWNLOAD
Author : Abdalla K. Musallam
language : en
Publisher:
Release Date : 1989
Fluid Inclusions And Archean Lode Gold Lake Of The Woods Ontario Canada written by Abdalla K. Musallam and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.