scholarly journals High cerium anomalies in zircon from intrusions associated with porphyry copper mineralization in the Gibraltar deposit, south-central British Columbia

2018 ◽  
Author(s):  
C H Kobylinski ◽  
K Hattori ◽  
S W Smith ◽  
A Plouffe
Keyword(s):  
British Columbia ◽  
Porphyry Copper ◽  
South Central ◽  
Copper Mineralization ◽  
Porphyry Copper Mineralization

scholarly journals RECOGNIZING PORPHYRY COPPER POTENTIAL FROM TILL ZIRCON COMPOSITION: A CASE STUDY FROM THE HIGHLAND VALLEY PORPHYRY DISTRICT, SOUTH-CENTRAL BRITISH COLUMBIA

2021 ◽  
Author(s):  
Robert G. Lee ◽  
Alain Plouffe ◽  
Travis Ferbey ◽  
Craig J.R. Hart ◽  
Pete Hollings ◽  
...  
Keyword(s):  
British Columbia ◽  
Trace Element ◽  
Detrital Zircon ◽  
Porphyry Copper ◽  
Detrital Zircons ◽  
Late Triassic ◽  
Ionization Mass ◽  
South Central ◽  
Copper Mineralization ◽  
Porphyry Copper Mineralization

Abstract The detrital zircons in tills overlying the Guichon Creek batholith, British Columbia, Canada, have trace element concentrations and ages similar to those of zircons from the bedrock samples from which they are interpreted to have been sourced. Rocks from the core of the batholith that host porphyry copper mineralization have distinct zircon compositions relative to the distal, barren margin. We analyzed 296 zircons separated from 12 subglacial till samples to obtain U-Pb ages and trace element compositions. Laser ablation U-Pb ages of the detrital zircons overlap within error with chemical abrasion-thermal ionization mass spectrometry U-Pb ages of the Late Triassic Guichon Creek batholith and confirm that the detrital zircons are likely derived from the batholith. The youngest intrusions of the batholith produced the Highland Valley Copper porphyry deposits and contain distinctive zircons with elevated Eu/EuN* >0.4 attributed to high magmatic water contents and oxidation states, indicating higher porphyry copper potential. Zircon from till samples adjacent to and 9 km down-ice from the mineralized centers have mean Eu/EuN* >0.4, which are indicative of potential porphyry copper mineralization. Detrital zircon grains from more distal up- and down-ice locations (10–15 km) have zircon Eu/EuN* mean values of 0.26 to 0.37, reflecting background values. We conclude that detrital zircon compositions in glacial sediments transported several kilometers can be used to establish the regional potential for porphyry copper mineralization.

Geochronology of mid-Cretaceous to Eocene magmatism, Babine porphyry copper district, central British Columbia

2001 ◽  
Vol 38 (4) ◽  
pp. 639-655 ◽  
Author(s):  
D G MacIntyre ◽  
M E Villeneuve
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Porphyry Copper ◽  
Volcanic Rocks ◽  
Porphyry Copper Deposits ◽  
Isotopic Dating ◽  
Plate Convergence ◽  
Copper Mineralization ◽  
Porphyry Copper Mineralization ◽  
Magmatic Event

New U/Pb and 40Ar/39Ar isotopic dating in the Babine porphyry copper district of central British Columbia documents three distinct magmatic events at 107–104, 85–78, and 54–50 Ma. The earliest event involved emplacement of rhyolite domes into submarine volcanic rocks of the Rocky Ridge Formation. The rhyolite domes and related dacitic to basaltic volcanic rocks gave a U–Pb age of 107.9 ± 0.2 Ma and an 40Ar/39Ar age of 104.8 ± 1.2 Ma. The rhyolites, which were previously mapped as Eocene, are reinterpreted to be part of a previously unrecognized mid-Cretaceous cauldron subsidence complex. The regionally extensive Late Cretaceous magmatic event is also recognized in the Babine district and is represented by 40Ar/39Ar ages of 85.2 ± 2.8 and 78.3 ± 0.8 Ma on two Bulkley intrusions, one of which has associated porphyry copper mineralization. The final magmatic event is the most widespread and involved emplacement of the Babine intrusions and formation of numerous porphyry copper deposits including the Bell and Granisle past producers. Twenty-one new 40Ar/39Ar isotopic ages for these intrusions and coeval andesites of the Newman Formation have a narrow range from 53.6 ± 0.9 to 49.9 ± 0.6 Ma, whereas previous K–Ar isotopic dating had a possible range of 15 Ma. The mid-Cretaceous, Late Cretaceous, and Eocene magmatic suites in the Babine district are interpreted to be part of a long-lived volcano-plutonic complex that was the site of periodic magmatism and porphyry copper mineralization over a 60 Ma time period. This complex may have evolved within a zone of extension (pull-apart basins) situated between dextral strike-slip faults that were active during periods of rapid oblique plate convergence.

Geology and geochemistry of the Suaqui Verde deposit: A contribution to the knowledge of the Laramide porphyry copper mineralization in south central Sonora, Mexico

2017 ◽  
Vol 81 ◽  
pp. 1158-1171 ◽  
Author(s):  
L.H. Ochoa-Landín ◽  
M. Valencia-Moreno ◽  
T. Calmus ◽  
R. Del Rio-Salas ◽  
H. Mendívil-Quijada ◽  
...  
Keyword(s):  
Porphyry Copper ◽  
South Central ◽  
Copper Mineralization ◽  
Porphyry Copper Mineralization

New U–Pb and Re–Os geochronology of Laramide porphyry copper mineralization along the Cananea lineament, northeastern Sonora, Mexico: Contribution to the understanding of the Cananea copper district

2017 ◽  
Vol 81 ◽  
pp. 1125-1136 ◽  
Author(s):  
Rafael Del Rio-Salas ◽  
Lucas Ochoa-Landín ◽  
Martín Valencia-Moreno ◽  
Thierry Calmus ◽  
Diana Meza-Figueroa ◽  
...  
Keyword(s):  
Porphyry Copper ◽  
Copper Mineralization ◽  
Porphyry Copper Mineralization

scholarly journals Mineral markers of porphyry copper mineralization: progress report on the evaluation of tourmaline as an indicator mineral

2018 ◽  
Author(s):  
M B McClenaghan ◽  
C E Beckett-Brown ◽  
M W McCurdy ◽  
A M McDonald ◽  
M I Leybourne ◽  
...  
Keyword(s):  
Porphyry Copper ◽  
Progress Report ◽  
Copper Mineralization ◽  
Indicator Mineral ◽  
Porphyry Copper Mineralization
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