scholarly journals Evolution of ore-forming fluids in the Bukovik-Kadiica porphyry Cu deposit, Republic of Macedonia

2018 ◽  
Vol 71 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Goran K. Tasev ◽  
Dalibor T. Serafimovski ◽  
Todor S. Serafimovski
Keyword(s):  
Republic Of Macedonia ◽  
Porphyry Cu ◽  
Porphyry Cu Deposit

High oxidation magmatic evolution in the Naruo porphyry Cu deposit, Tibet, China

2019 ◽  
Vol 76 ◽  
pp. 26-43 ◽  
Author(s):  
Xiangping Zhu ◽  
Duoji ◽  
Guangming Li ◽  
Hongfei Liu ◽  
Huaan Chen ◽  
...  
Keyword(s):  
Magmatic Evolution ◽  
Porphyry Cu ◽  
High Oxidation ◽  
Porphyry Cu Deposit

scholarly journals Geological and Chronological Constraints on the Long-Lived Eocene Yulong Porphyry Cu-Mo Deposit, Eastern Tibet: Implications for the Lifespan of Giant Porphyry Cu Deposits

2017 ◽  
Vol 112 (7) ◽  
pp. 1719-1746 ◽  
Author(s):  
Jia Chang ◽  
Jian-Wei Li ◽  
David Selby ◽  
Jia-Cheng Liu ◽  
Xiao-Dong Deng
Keyword(s):  
Early Stage ◽  
Porphyry Copper ◽  
Copper Deposit ◽  
Granite Porphyry ◽  
Radiometric Dating ◽  
Time Interval ◽  
Porphyry Cu ◽  
Economic Significance ◽  
Vein Formation ◽  
Porphyry Cu Deposit

Abstract The Yulong porphyry Cu-Mo deposit, the third largest porphyry Cu deposit in China, contains proven reserves of > 6.5 million metric tons (Mt) Cu and 0.4 Mt Mo. Previous radiometric dating studies have provided numerous ages for this deposit, but the timing and duration of the process governing the deposition of Cu and Mo remains not well constrained. In this paper, we first document multiple stages of mineralization and hydrothermal alteration associated with distinct magmatic pulses at Yulong by field and textural relationships, and then present high-precision molybdenite Re-Os ages of 14 quartz-molybdenite ± chalcopyrite veins representing these stages to precisely constrain the timing and duration of Cu-Mo mineralization. The ore-hosting Yulong composite stock consists of three successive porphyry intrusions: (1) monzonitic granite porphyry (MGP), (2) K-feldspar granite porphyry (KGP), and (3) quartz albite porphyry (QAP). The vein formation, Cu-Mo mineralization, and ore-related alteration are grouped into early, transitional, and late stages with respect to the intrusive history. The first two porphyry intrusions are followed by cyclical sequences of veining that are mainly associated with potassic alteration and have formed (1) ME vein/USTT, (2) EBE/T veins, (3) A1E/T veins, (4) A2E/BT veins, and (5) A3E/T veins. A2E/BT and A3E/T veins of the early and transitional stages are dominated by quartz and chalcopyrite ± pyrite, respectively, and represent the main Cu-Mo mineralization events. More than 80% of Cu and Mo at Yulong were deposited in the early stage with the remainder being formed in the transitional stage. The late-stage pyrite-quartz veins (DL), which are characterized by sericitic alteration halos, postdate the intrusion of QAP dikes and have no economic significance. Molybdenite Re-Os ages of A2E and BT veins indicate that sulfide deposition at Yulong was episodic over a prolonged history lasting over 5.13 ± 0.23 m.y. (1σ). However, the bulk Cu-Mo ores formed in a shorter time interval of 1.36 ± 0.24 m.y. (1σ) with most Cu precipitated in a more restricted timespan of 0.82 ± 0.24 m.y. (1σ) in the early stage. These results, combined with geochronologic data from porphyry copper deposits elsewhere, confirm that multiple magmatic-hydrothermal pulses with a lifespan of tens to hundreds of thousands of years are sufficient to form a giant porphyry copper deposit. Factors such as metal concentration, volume, and focusing efficiency of ore-forming fluids could have played important roles in producing a giant porphyry Cu deposit regardless of a short- or long-lived magmatic-hydrothermal system.

Miocene multi‐source magma system and magma mixing in the Zhunuo porphyry Cu deposit, southern Tibet, China

2020 ◽  
Vol 55 (12) ◽  
pp. 8092-8108
Author(s):  
Aorigele Zhou ◽  
Qiu‐Ping Liu ◽  
Ju‐Xing Tang ◽  
Ming Xu ◽  
Yi‐Yun Wang ◽  
...  
Keyword(s):  
Magma Mixing ◽  
Southern Tibet ◽  
Porphyry Cu ◽  
Magma System ◽  
Porphyry Cu Deposit

scholarly journals Mapping Hydrothermal Zoning Pattern of Porphyry Cu Deposit Using Absorption Feature Parameters Calculated from ASTER Data

2019 ◽  
Vol 11 (14) ◽  
pp. 1729 ◽  
Author(s):  
Mengjuan Wu ◽  
Kefa Zhou ◽  
Quan Wang ◽  
Jinlin Wang
Keyword(s):  
Thermal Emission ◽  
Porphyry Copper ◽  
Copper Deposit ◽  
Geological Mapping ◽  
Systematic Sampling ◽  
Small Scale ◽  
Absorption Feature ◽  
Porphyry Cu ◽  
Feature Parameters ◽  
Porphyry Cu Deposit

Identifying hydrothermal zoning pattern associated with porphyry copper deposit is important for indicating its economic potential. Traditional approaches like systematic sampling and conventional geological mapping are time-consuming and labor extensive, and with limitations for providing small scale information. Recent developments suggest that remote sensing is a powerful tool for mapping and interpreting the spatial pattern of porphyry Cu deposit. In this study, we integrated in situ spectral measurement taken at the Yudai copper deposit in the Kalatag district, northwestern China, information obtained by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), as well as the spectra of samples (hand-specimen) measured using an Analytical Spectral Device (ASD) FieldSpec4 high-resolution spectrometer in laboratory, to map the hydrothermal zoning pattern of the copper deposit. Results proved that the common statistical approaches, such as relative band depth and Principle Component Analysis (PCA), were unable to identify the pattern accurately. To address the difficulty, we introduced a curve-fitting technique for ASTER shortwave infrared data to simulate Al(OH)-bearing, Fe/Mg(OH)-bearing, and carbonate minerals absorption features, respectively. The results indicate that the absorption feature parameters can effectively locate the ore body inside the research region, suggesting the absorption feature parameters have great potentials to delineate hydrothermal zoning pattern of porphyry Cu deposit. We foresee the method being widely used in the future.

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