scholarly journals Petrogenesis of Ore-Related Granodiorite Porphyry in the Jiande Copper Deposit, SE China: Implications for the Tectonic Setting and Mineralization

2017 ◽  
Vol 67 (2) ◽  
pp. 117-138 ◽  
Author(s):  
Hui Chen ◽  
Pei Ni ◽  
Guo-Guang Wang ◽  
Ren-Yi Chen ◽  
Zhi-Cheng Lü ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Copper Deposit ◽  
Granodiorite Porphyry ◽  
Se China

Mineralogy and Tectonic Setting in Guihuachong Copper Deposit in Tongling, Anhui Province

2014 ◽  
Vol 1073-1076 ◽  
pp. 2063-2067
Author(s):  
Zi Long Yue ◽  
Bin Liu ◽  
Qian Hui Lv
Keyword(s):  
Tectonic Setting ◽  
Eastern China ◽  
Copper Deposit ◽  
Potassium Feldspar ◽  
Anhui Province ◽  
Secondary Minerals ◽  
Gold Silver ◽  
Ore Minerals ◽  
Granodiorite Porphyry

The Guihuachong copper deposit is located in the Shatanjiao ore field along the MLYRMB in eastern China, mainly consist of porphyry ores hosted in granodiorite porphyry, which has newly been discovered in recent years. Metal ore minerals are mainly pyrite, chalcopyrite, bornite, sphalerite, magnetite, secondary minerals are hematite, pyrrhotite, galena, and tetrahedrite, natural gold, silver and other minerals. The gangue minerals are mainly for the plagioclase, calcite, potassium feldspar, garnet, diopside, kaolinite, quartz, biotite, chlorite, siderite, fluorite, anhydrite and hornblende.

Early to late Yanshanian I-type granites in Fujian Province, SE China: Implications for the tectonic setting and Mo mineralization

2017 ◽  
Vol 137 ◽  
pp. 194-219 ◽  
Author(s):  
Yu-Long Yang ◽  
Pei Ni ◽  
Jun Yan ◽  
Chang-Zhi Wu ◽  
Bao-Zhang Dai ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Fujian Province ◽  
Se China

Petrogenesis and tectonic setting of the Devonian Xiqin A-type granite in the northeastern Cathaysia Block, SE China

2017 ◽  
Vol 141 ◽  
pp. 43-58 ◽  
Author(s):  
Da-wei Cai ◽  
Yong Tang ◽  
Hui Zhang ◽  
Zheng-Hang Lv ◽  
Yun-long Liu
Keyword(s):  
Tectonic Setting ◽  
Type Granite ◽  
Cathaysia Block ◽  
Se China

HYPOGENE ALUNITE FROM THE EL SALVADOR DISTRICT, CHILE, INDICATES POTENTIAL FOR A BLIND PORPHYRY COPPER CENTER

2020 ◽  
Vol 115 (2) ◽  
pp. 231-239 ◽  
Author(s):  
Jeffrey W. Hedenquist ◽  
Yasushi Watanabe ◽  
Antonio Arribas
Keyword(s):  
El Salvador ◽  
Porphyry Copper ◽  
Copper Deposit ◽  
Hydrothermal Activity ◽  
Porphyry Copper Deposits ◽  
Copper Ore ◽  
Copper Mineralization ◽  
Alteration Minerals ◽  
Porphyry Copper Mineralization ◽  
Granodiorite Porphyry

Abstract Surface samples of hypogene alunite that cement late breccia bodies from the El Salvador porphyry copper district of Chile were recently dated. One alunite sample over the principal Turquoise Gulch porphyry deposit has a 40Ar/39Ar total gas age of 40.64 ± 1.04 Ma, overlapping the age of a late latite intrusion. Two other samples associated with quartz-alunite replacement of rhyolite, ~750 m southwest of the collapse zone over the block cave of the porphyry copper deposit, are distinctly younger, at 38.12 ± 0.66 and 38.04 ± 0.22 Ma (averages of duplicate analyses, with ±2σ errors). Previously reported U/Pb ages of zircons from 15 Eocene-age diorite, granodiorite, and granite porphyry intrusions have weighted mean ages that range from about 44 to 41 Ma, with peak magmatic flux interpreted at 44 to 43 Ma. Porphyry copper ores in the El Salvador district formed at about the same time as porphyry intrusions, with intrusive centers that migrated in a south-southwest direction, from the small deposits at Cerro Pelado (~44.2 Ma), to Old Camp (~43.6 Ma) and M Gulch-Copper Hill (~43.5–43.1 Ma), to the main ore deposit at Turquoise Gulch (~42 Ma). The granodiorite porphyry intrusions at Turquoise Gulch are associated with ~80% of the known copper ore of the district; they record waning stages of magmatism at 42.5 to 42.0 Ma, followed by weakly altered latite dikes at 41.6 Ma. Molybdenite in quartz veins returned Re-Os ages of 41.8 to 41.2 Ma. The two alunite samples from our study with coincident dates of ~38 Ma provide evidence for magmatic-hydrothermal activity younger than any recognized to date, consistent with the alteration overprint of quartz-alunite on older muscovite after erosion. This younger activity must have been associated with a blind intrusion, likely located south of the Turquoise Gulch deposit, based on the distribution of alteration minerals, and offset from the zoning associated with the Turquoise Gulch center. Stable isotope values (δ34S, δ18O, δD) of the ~38 Ma alunite indicate a high-temperature hypogene origin, consistent with formation in a lithocap environment that typically is located at shallow levels over and on the shoulders of porphyry copper deposits. Both observations—alteration overprint and markedly younger age of alunite—indicate the potential for porphyry copper mineralization south of Granite Gulch, as much as 1,000 m below the level of the coeval outcropping quartz-alunite replacement, perhaps near ~2,000-m elevation; this is hundreds of meters deeper than the known copper ore of Turquoise Gulch.

Reassessment of the Mesozoic metasedimentary rocks and tectonic setting of Taiwan and the adjacent continental margin of eastern Asia

2016 ◽  
Vol 154 (5) ◽  
pp. 1127-1154 ◽  
Author(s):  
YU WANG ◽  
CHIN-HO TSAI ◽  
LIYUN ZHOU ◽  
YAN QIU ◽  
GUIHUA SUN
Keyword(s):  
Continental Margin ◽  
Tectonic Setting ◽  
Active Continental Margin ◽  
Crystalline Basement ◽  
Detrital Zircons ◽  
Source Rocks ◽  
Metamorphic Belt ◽  
Late Mesozoic ◽  
Sedimentary Sequences ◽  
Se China

AbstractIt remains unclear whether a crystalline basement exists in SE China (including Taiwan), whether the formation of the Tananao metamorphic belt in Taiwan was linked to subduction of the Palaeo-Pacific Plate, and whether the source rocks of the sedimentary sequences in the metamorphic belts are late Mesozoic or Palaeozoic in age. Field investigations and zircon age data in the present study indicate that there is no pre-Palaeozoic gneiss (crystalline basement) in Taiwan (although orthogneisses were produced during deformation and metamorphism of Mesozoic granites), and investigations of the metasediments show that the sedimentary sequences in the Tailuko and Yuli belts are similar. Moreover, LA-ICP-MS dating of detrital zircons from the Pingtan–Dongshan belt in Fujian Province yields a cluster of 206Pb–238U ages at ~ 210–190 Ma, and the Tailuko and Yuli belts in Taiwan have similar clusters of detrital zircon ages at 200 Ma, 160 Ma, 120 Ma and 110 Ma, as well as a later overprinting caused by arc–continent collision. The cathodoluminescence images and trace-element characteristics of the zircons show that they were originally magmatic in origin. This finding, combined with the Hf isotope data, indicates that the sources of sediments in the Tananao belt (Tailuko and Yuli belts) were relatively close to an active continental margin, and that both the Tailuko and Yuli belts have similar sedimentary sources. From the margin of the Chinese mainland to Taiwan, the metasediments seem to represent a continuous sequence of deposits ranging in age from Jurassic to Cretaceous, but with the sediments becoming progressively younger towards the east. It can be inferred that the sediments in the Tailuko and Yuli belts were continental-shelf sequences with sources in SE China.

In-situ U–Pb SIMS dating and trace element (EMPA) composition of zircon from a granodiorite porphyry in the Wushan copper deposit, China

2005 ◽  
Vol 86 (1-2) ◽  
pp. 29-44 ◽  
Author(s):  
X. Ding ◽  
S.-Y. Jiang ◽  
K.-D. Zhao ◽  
E. Nakamura ◽  
K. Kobayashi ◽  
...  
Keyword(s):  
Trace Element ◽  
Copper Deposit ◽  
Granodiorite Porphyry
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