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gold

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Journal Article
Journal: Geology
Published: 29 November 2017
Geology (2017) 46 (1): 39-42.
...Amy Gartman; Mark Hannington; John W. Jamieson; Ben Peterkin; Dieter Garbe-Schönberg; Alyssa J. Findlay; Sebastian Fuchs; Tom Kwasnitschka Abstract Gold colloids occur in black smoker fluids from the Niua South hydrothermal vent field, Lau Basin (South Pacific Ocean), confirming the long-standing...
FIGURES | View All (4)
Series: GSA Special Papers
Published: 01 September 2016
DOI: 10.1130/2016.2522(08)
...-biotite ore zones typically contain cobaltite 1 in a matrix of biotitite ± tourmaline ± minor xenotime (ca. 1370–1320 Ma) ± minor chalcopyrite ± sparse allanite ± sparse microscopic native gold in cobaltite. Such cobaltite-biotite lodes are locally folded into tight F 2 folds with axial-planar S 2...
Journal Article
Published: 01 February 2002
Mineralogical Magazine (2002) 66 (1): 215-229.
... images of samples from the Gold Hunter-Lucky Friday and West Chance veins. ( a ) BSE image of a partial corona of bournonite (bno) between a grain of fahlore (fah) and surrounding grains of galena (gn) in WC-7. Scalebar indicates 100 μm. ( b ) Ag X-ray image of area depicted in ( a ). ( c ) BSE image...
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Journal Article
Published: 01 June 2001
The Canadian Mineralogist (2001) 39 (3): 889-905.
...John Knight; Craig H.B. Leitch Abstract The composition of some 85 particles of native gold from the 15 Mile rodingite in serpentinite showing in the Coquihalla gold district and the Wheaton Creek placer in the Dease Lake district, British Columbia, falls mainly within the Cu-rich portion of the Au...
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Journal Article
Published: 01 June 2001
The Canadian Mineralogist (2001) 39 (3): 907-915.
... originales de Ag et de Cu. (Traduit par la Rédaction) Abstract The Cerro Casale gold-rich orebody, located in the Maricunga Belt, in northern Chile, is a Miocene deposit hosted in diorite and granodiorite porphyries. Two broad types of hypogene alteration are associated with gold mineralization: potassic...
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Journal Article
Published: 01 July 2000
Bulletin de la Société Géologique de France (2000) 171 (4): 397-405.
...Mariam Ouangrawa; Georges Grandin; Jean-Claude Parisot; Mireille Delaune Abstract On a barren bedrock, transported auriferous materials of colluvial and alluvial origin present differences in the distribution, composition and morphology of gold particles. Under Sudano-Sahelian conditions, transport...
Journal Article
Published: 01 February 2000
The Canadian Mineralogist (2000) 38 (1): 1-10.
...Ian M. Steele; Louis J. Cabri; José C. Gaspar; Greg McMahon; Marco A. Marquez; Marcos A.Z. Vasconcellos Abstract Sulfides may be analyzed for gold using Secondary Ion Mass Spectrometry (SIMS) and Synchrotron X-Ray Fluorescence (SXRF); we have compared the two methods with respect to instrumental...
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Journal Article
Journal: Geology
Published: 01 February 2000
Geology (2000) 28 (2): 131-134.
... , v. v. 104 pp. 145 ߝ 154 . Oguri , K. , Shimoda , G. , and Tatsumi , Y. , 1999 , Quantitative determination of gold and the platinum-group elements in geological samples using improved NiS fire assay and tellurium coprecipitation with inductively coupled plasma-mass spectrometry...
FIGURES
Journal Article
Published: 01 December 1999
The Canadian Mineralogist (1999) 37 (6): 1525-1531.
Journal Article
Published: 01 August 1999
American Mineralogist (1999) 84 (7-8): 1071-1079.
...Grigore Simon; Hui Huang; James E. Penner-Hahn; Stephen E. Kesler; Li-Shun Kao Abstract XANES measurements on gold-bearing arsenian pyrite from the Twin Creeks Carlin-type gold deposits show that gold is present as both Au 0 and Au (super I+) and arsenic is present at As (super I-) . Au 0...
Journal Article
Journal: Geology
Published: 01 January 1999
Geology (1999) 27 (1): 59-62.
...Poul Emsbo; Richard W. Hutchinson; Albert H. Hofstra; Jeffrey A. Volk; Keith H. Bettles; Gary J. Baschuk; Craig A Johnson Abstract A new type of gold occurrence recently discovered in the Carlin trend, north-central Nevada, is clearly distinct from classic Carlin-type gold ore. These occurrences...
Journal Article
Published: 01 December 1998
American Mineralogist (1998) 83 (11-12_Part_1): 1240-1245.
...L. M. Maddox; G. Michael Bancroft; M. J. Scaini; J. W. Lorimer Abstract X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and open circuit potentials were used to compare the size, chemical state, and distribution of adsorbed and reduced gold from Au...
Journal Article
Published: 01 October 1998
The Canadian Mineralogist (1998) 36 (5): 1347-1360.
Journal Article
Published: 01 October 1998
The Canadian Mineralogist (1998) 36 (5): 1361-1372.
Journal Article
Journal: The Leading Edge
Published: 01 July 1998
The Leading Edge (1998) 17 (7): 927-933.
Journal Article
Journal: Economic Geology
Published: 01 April 1998
Economic Geology (1998) 93 (2): 201-215.
...David P. Stenger; Stephen E. Kesler; Dean R. Peltonen; Charles J. Tapper Abstract We report here an investigation of the distribution of Au, As, Sb, Hg, carbonates, K-Al silicates, and pyrite in the Twin Creeks Carlin-type gold deposit. The main objective of the study was to determine the nature...
Journal Article
Journal: Geology
Published: 01 April 1998
Geology (1998) 26 (4): 339-342.
...Gordon Southam Abstract An examination of Yukon placer gold nuggets using ultrathin-section (70 nm) transmission electron microscopy and energy-dispersive X-ray spectroscopy revealed three distinct morphological and compositional regions. The outer surface of the nuggets possessed silicate minerals...
Journal Article
Journal: Economic Geology
Published: 01 July 1997
Economic Geology (1997) 92 (4): 490-501.
Journal Article
Published: 01 June 1997
The Canadian Mineralogist (1997) 35 (3): 573-586.
Journal Article
Published: 01 April 1997
Canadian Journal of Earth Sciences (1997) 34 (4): 337-351.