Styles of lode gold mineralization contributing to the placers of the Indian River and Black Hills Creek, Yukon Territory, Canada as deduced from microchemical characterization of placer gold grains

2011 ◽  
Vol 46 (8) ◽  
pp. 881-903 ◽  
Author(s):  
Robert John Chapman ◽  
James Keith Mortensen ◽  
William P. LeBarge
Keyword(s):  
Gold Mineralization ◽  
Yukon Territory ◽  
Black Hills ◽  
Placer Gold ◽  
Lode Gold ◽  
Indian River ◽  
Microchemical Characterization

scholarly journals Microchemical characterization of placer gold grains from the Meyos-Essabikoula area, Ntem complex, southern Cameroon

2019 ◽  
Vol 151 ◽  
pp. 189-201 ◽  
Author(s):  
Franck Wilfried Nguimatsia Dongmo ◽  
Robert John Chapman ◽  
Anthony Temidayo Bolarinwa ◽  
Rose Fouateu Yongue ◽  
David A. Banks ◽  
...  
Keyword(s):  
Placer Gold ◽  
Southern Cameroon ◽  
Microchemical Characterization

Microstructural and Microchemical Characterization of Nickel Sulfide Inclusions in Plate Glass

1991 ◽  
Vol 49 ◽  
pp. 962-963
Author(s):  
J. Cooper ◽  
O. Popoola ◽  
W. M. Kriven
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Glass Matrix ◽  
Nickel Sulfide ◽  
Plate Glass ◽  
Thermal Expansion Mismatch ◽  
Volume Increase ◽  
Β Phase ◽  
Microchemical Characterization

Nickel sulfide inclusions have been implicated in the spontaneous fracture of large windows of tempered plate glass. Two alternative explanations for the fracture-initiating behaviour of these inclusions have been proposed: (1) the volume increase which accompanies the α to β phase transformation in stoichiometric NiS, and (2) the thermal expansion mismatch between the nickel sulfide phases and the glass matrix. The microstructure and microchemistry of the small inclusions (80 to 250 μm spheres), needed to determine the cause of fracture, have not been well characterized hitherto. The aim of this communication is to report a detailed TEM and EDS study of the inclusions.

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