scholarly journals Geochemical constraints on the origin of sulfide mineralization in the Duke Island Complex, southeastern Alaska

2008 ◽  
Vol 9 (7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Joyashish Thakurta ◽  
Edward M. Ripley ◽  
Chusi Li
Keyword(s):  
Sulfide Mineralization ◽  
Duke Island ◽  
Geochemical Constraints

scholarly journals Geochronological and Geochemical Constraints on the Formation of the Giant Zaozigou Au-Sb Deposit, West Qinling, China

Minerals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 37 ◽  
Author(s):  
Hao-Cheng Yu ◽  
Chang-An Guo ◽  
Kun-Feng Qiu ◽  
Duncan McIntire ◽  
Gui-Peng Jiang ◽  
...  
Keyword(s):  
Mineral Assemblage ◽  
Spatial Association ◽  
Massive Sulfide ◽  
Stage Model ◽  
Sulfide Mineralization ◽  
Low Oxygen ◽  
Ore Formation ◽  
West Qinling ◽  
T Values ◽  
Geochemical Constraints

The Zaozigou Au-Sb deposit has been controversial in its genesis and remains one of the most difficult ore systems to fully understand in West Qinling. The mineralization shows a broad spatial association with Triassic dikes and sills, which were previously thought to be genetically related to mineralization. Our U-Pb zircon dating in this contribution indicates that the ore-hosting porphyritic dacites were formed at 246.1 ± 5.2 Ma and 248.1 ± 3.8 Ma. The magmatic zircons yield εHf(t) values ranging from −12.5 to −8.9, with corresponding two-stage model ages of 2.08 to 1.83 Ga. The magma therefore could be derived from partial melting of Paleoproterozoic crustal materials. The ore-hosting porphyritic dacites have low oxygen fugacity, with ΔFMQ ranging from −4.61 to −2.56, indicating that magmas could have been sulfide-saturated during evolution in deep chambers and precluding the possibility that metals were released from the melt. Zaozigou exhibits characteristics widespread volcanics, massive sulfide mineralization, rare reduced mineral assemblage and discrete alteration zones which are not typical of reduced intrusion-related or porphyry gold systems. We propose that the spatially-related Triassic porphyritic dacite and dike swarm is not genetically related to the ore formation of Zaozigou Au-Sb deposit.

PGE geochemical constraints on the origin of the Ni-Cu-PGE sulfide mineralization in the Suoi Cun intrusion, Cao Bang province, Northeastern Vietnam

2014 ◽  
Vol 109 (2) ◽  
pp. 161-180 ◽  
Author(s):  
Tatyana V. Svetlitskaya ◽  
Nadezhda D. Tolstykh ◽  
Andrey E. Izokh ◽  
Phuong Ngo Thi
Keyword(s):  
Sulfide Mineralization ◽  
Geochemical Constraints

Native Metal Sulfide Mineralization of Perga Ore Knot (the Ukrainian Shield)

2017 ◽  
Vol 39 (4) ◽  
pp. 77-88
Author(s):  
B. SLOBODYAN ◽  
V. PAVLYSHYN ◽  
S. BONDARENKO ◽  
L. STEPANYUK ◽  
V. SYOMKA ◽  
...  
Keyword(s):  
Metal Sulfide ◽  
Ukrainian Shield ◽  
Sulfide Mineralization ◽  
Native Metal

EVIDENCE OF NEOPROTEROZOIC BACKARC BASIN DEVELOPMENT IN THE CENTRAL RIBEIRA BELT, SOUTHEASTERN BRAZIL: NEW GEOCHRONOLOGICAL AND GEOCHEMICAL CONSTRAINTS FROM THE SÃO ROQUE - AÇUNGUI GROUPS

2000 ◽  
Vol 30 (1) ◽  
pp. 110-114 ◽  
Author(s):  
PETER CHRISTIAN HACKSPACHER ◽  
ELTON LUIZ DANTAS ◽  
ANGELO SPOLADORE ◽  
ALLEN HUTCHESON FETTER ◽  
MARCOS AURÉLIO FARIA DE OLIVEIRA
Keyword(s):  
Southeastern Brazil ◽  
Backarc Basin ◽  
Basin Development ◽  
Geochemical Constraints
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