Results 101 to 110 of about 1,650 (170)
Applied Geochemistry, 2012 Abstract This study investigates Sb speciation in sediments along the drainage of the Upper Peter adit at the Bralorne Au mine in southern British Columbia, Canada, and compares the behavior of Sb with that of As. The Upper Peter mineralization consists of native Au in quartz-carbonate veins with 1 wt.% sulfides dominated by pyrite and arsenopyrite ...
Suzanne Beauchemin +6 more
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Mineralium Deposita, 1998 New Pb isotope data from three major mesothermal lode gold deposits (Ballarat West, Tarnagulla, Maldon) in central Victoria support a model whereby the metals derived from a large reservoir with a long residence time in the crust below the Palaeozoic Lachlan Fold Belt.
F. P. Bierlein, N. J. McNaughton
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Age constraints of the Wassa and Benso mesothermal gold deposits, Ashanti Belt, Ghana, West Africa
Journal of African Earth Sciences, 2015 Abstract The Ashanti Belt in Ghana hosts numerous multi-million ounce gold deposits and is one of the most richly gold endowed Paleoproterozoic belts of the West African Craton. This work shows that the Wassa mineralized intrusion is part of the Sefwi Group.
Luis A. Parra‐Avila +5 more
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, 2005 The Asimotrypes carbonate-hosted mesothermal gold deposit, located at Eastern Macedonia, north Greece, geologically belongs to the West Rhodope massif, which represents the metamorphic core complex of an alpine collision orogen. The ore is of replacement and shear zone-controlled types.
Demetrios G. Eliopoulos +1 more
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Rapid dewatering of the crust deduced from ages of mesothermal gold deposits [PDF]
Nature, 1991 THE large-scale migration of fluids through the continental crust has been well documented, but there is no consensus regarding the timing of fluid migration relative to orogenic episodes, or rates of crustal dewatering1. Here we present40Ar/39Ar dates for muscovites from quartz veins along a major shear zone in southeast Alaska, which show that the ...
Richard J. Goldfarb +3 more
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A regional study of mesothermal quartz vein hosted gold deposits in the Pine Creek geosyncline
, 1996 Andrew S. Wygralak
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Geology of the Hammer Down mesothermal gold deposit, Newfoundland Appalachians, Canada
Canadian Journal of Earth Sciences, 1996The Hammer Down gold deposit is one of the most significant mesothermal vein-type gold deposits in the Canadian Appalachians. It is located within a complex sequence of Ordovician, mafic-dominated tholeiitic and calc-alkalic and arc-related volcanic rocks, which was intruded by Silurian felsic porphyry dykes.
Gaboury, Damien +3 more
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Arabian Journal of Geosciences, 2019
The genesis of mesothermal Au-quartz vein deposits, which are among the more economically important type of Au deposits, is still under debate. There are two main theories, proposed in the literature, for the subsequent formation of these deposits in suitable structure involved: (1) Au-bearing ore fluid was derived from magmatic intrusions; or (2) Au ...
Jie Wu +6 more
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The genesis of mesothermal Au-quartz vein deposits, which are among the more economically important type of Au deposits, is still under debate. There are two main theories, proposed in the literature, for the subsequent formation of these deposits in suitable structure involved: (1) Au-bearing ore fluid was derived from magmatic intrusions; or (2) Au ...
Jie Wu +6 more
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Can lamprophyres resolve the genetic controversy over mesothermal gold deposits?
Geology, 1988Associations between calc-alkaline lamprophyres and mesothermal gold deposits (Archean to Tertiary) in which the lamprophyres are coeval (as well as cospatial) with mineralization are increasingly recognized worldwide. Our suggested hypothesis regards lamprophyres as transporting agents for Au from Au-rich sources in the deep mantle, which then undergo
Nicholas M.S. Rock, David I. Groves
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