scholarly journals Application of Roasting Pretreatment for Gold Dissolution from the Invisible Gold Concentrate and Mineralogical Interpretation of their Digested Products

2013 ◽  
Vol 26 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Bong-Ju Kim ◽  
Kang-Hee Cho ◽  
Su-Ji Oh ◽  
Hyun-Sung On ◽  
Byung-Joo Kim ◽  
...  
Keyword(s):  
Gold Dissolution ◽  
Invisible Gold ◽  
The Invisible

scholarly journals Invisible Gold Paragenesis and Geochemistry in Pyrite from Orogenic and Sediment-Hosted Gold Deposits

Minerals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 339 ◽  
Author(s):  
Ross R. Large ◽  
Valeriy V. Maslennikov
Keyword(s):  
Intermediate Stage ◽  
Gold Deposits ◽  
Arsenic Content ◽  
Invisible Gold ◽  
Chemical Association ◽  
Orogenic Events ◽  
Golden Mile ◽  
The Invisible ◽  
Gold Quarry

LA-ICPMS analysis of pyrite in ten gold deposits is used to determine the precise siting of invisible gold within pyrite, and thus the timing of gold introduction relative to the growth of pyrite and related orogenic events. A spectrum of invisible gold relationships in pyrite has been observed which suggests that, relative to orogenic pyrite growth, gold introduction in some deposits is early at the start of pyrite growth; in other deposits, it is late toward the end of pyrite growth and in a third case, it may be introduced at the intermediate stage of orogenic pyrite growth. In addition, we report a distinct chemical association of invisible gold in pyrite in the deposits studied. For example, in the Gold Quarry (Carlin type), Mt Olympus, Macraes and Konkera, the invisible gold is principally related to the arsenic content of pyrite. In contrast, in Kumtor and Geita Hill, the invisible gold is principally related to the tellurium content of pyrite. Other deposits (Golden Mile, Bendigo, Spanish Mountain, Witwatersrand Carbon Leader Reef (CLR)) exhibit both the Au-As and Au-Te association in pyrite. Some deposits of the Au-As association have late orogenic Au-As-rich rims on pyrite, which substantially increase the value of the ore. In contrast, deposits of the Au-Te association are not known to have Au-rich rims on pyrite but contain nano- to micro-inclusions of Au-Ag-(Pb-Bi) tellurides.

The Invisible Exit Sign

2006 ◽  
Vol 37 (2) ◽  
pp. 14
Author(s):  
ALAN ROCKOFF
Keyword(s):  
The Invisible

Review of Stillborn: The Invisible Death.

1987 ◽  
Vol 32 (1) ◽  
pp. 87-87
Author(s):  
No authorship indicated
Keyword(s):  
The Invisible

Illuminating the Invisible

1993 ◽  
Vol 38 (5) ◽  
pp. 508-509
Author(s):  
Karen L. Tucker
Keyword(s):  
The Invisible

I-O Teachers: Druids in the Desert, or the Invisible Man?

2006 ◽  
Author(s):  
Boris B. Baltes ◽  
Marcus W. Dickson
Keyword(s):  
Invisible Man ◽  
The Invisible
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