The Late Cretaceous Crustal Magmatism of the Geza Arc Metallogenic Belt in Yunnan Province, and Zircon Ages and Hf Isotopic Evidence of the Porphyry Cu-Mo Mineralization

Various types of deposits such as carbonate-replacement Pb-Zn-Ag-Au, porphyry Cu-Mo-Au, stratiform volcano-sedimentary, isolated magmatic-hydrothermal and skarns compose the Serbomacedonian-Rhodope Metallogenic Belt (SRMB), which intersects with a NNW-SSE trend the Balkan Peninsula. This arcuate belt is about 500 km long and 130-180 km wide. Sb-Bi alloys and Ag-Cu-Pb-Sb-Bi sulfosalts have been discovered in some metal assemblages in the SRMB. The European Union (EU) is highly dependent on critical and rare metals, such as Sb and Bi, which are very important for a sustainable development. Greece is one of the EU countries with the most potential for supplying the strategic metal Sb in the future, since it hosts a significant ore deposit at Rizana/Lachanas (central Macedonia). Here, the stibnite reserves are 5,000 t (proven) and 50,000-100,000 t (indicated). Both have average Sb=0.3 wt%. In addition, at the same district, there are 1000 t (proven) of wolframite. Another promising Sb-bearing mineral assemblage exists at Alshar (North Macedonia). Here, the stibnite reserves are >20,000 t (indicated) with average Sb=0.5 wt%. At both mineralization districts further investigations are needed to determine the grade and the proven reserves of the critical metal Sb. Until today none encouraging site has been located in the SRMB for remarkable Bi-bearing ore.

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Late Cretaceous granites from the giant Dulong Sn-polymetallic ore district in Yunnan Province, South China: Geochronology, geochemistry, mineral chemistry and Nd–Hf isotopic compositions

Lithos ◽

10.1016/j.lithos.2015.01.004 ◽

2015 ◽

Vol 218-219 ◽

pp. 54-72 ◽

Cited By ~ 44

Author(s):

Bin Xu ◽

Shao-Yong Jiang ◽

Rong Wang ◽

Liang Ma ◽

Kui-dong Zhao ◽

...

Keyword(s):

Late Cretaceous ◽

South China ◽

Yunnan Province ◽

Mineral Chemistry ◽

Isotopic Compositions ◽

Polymetallic Ore ◽

Ore District

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Geological, Geochronological, and Geochemical Insights into the Formation of the Giant Pulang Porphyry Cu (–Mo–Au) Deposit in Northwestern Yunnan Province, SW China

Minerals ◽

10.3390/min9030191 ◽

2019 ◽

Vol 9 (3) ◽

pp. 191 ◽

Cited By ~ 3

Author(s):

Qun Yang ◽

Yun-Sheng Ren ◽

Sheng-Bo Chen ◽

Guo-Liang Zhang ◽

Qing-Hong Zeng ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Yunnan Province ◽

Oceanic Lithosphere ◽

Late Triassic ◽

Porphyry Cu ◽

Icp Ms ◽

Heavy Rare Earth Elements ◽

Granodiorite Porphyry ◽

Northwestern Yunnan

The giant Pulang porphyry Cu (–Mo–Au) deposit in Northwestern Yunnan Province, China, is located in the southern part of the Triassic Yidun Arc. The Cu orebodies are mainly hosted in quartz monzonite porphyry (QMP) intruding quartz diorite porphyry (QDP) and cut by granodiorite porphyry (GP). New LA-ICP-MS zircon U–Pb ages indicate that QDP (227 ± 2 Ma), QMP (218 ± 1 Ma, 219 ± 1 Ma), and GP (209 ± 1 Ma) are significantly different in age; however, the molybdenite Re–Os isochron age (218 ± 2 Ma) indicates a close temporal and genetic relationship between Cu mineralization and QMP. Pulang porphyry intrusions are enriched in light rare-earth elements (LREEs) and large ion lithophile elements (LILEs), and depleted in heavy rare-earth elements (HREEs) and high field-strength elements (HFSEs), with moderately negative Eu anomalies. They are high in SiO2, Al2O3, Sr, Na2O/K2O, Mg#, and Sr/Y, but low in Y, and Yb, suggesting a geochemical affinity to high-silica (HSA) adakitic rocks. These features are used to infer that the Pulang HSA porphyry intrusions were derived from the partial melting of a basaltic oceanic-slab. These magmas reacted with peridotite during their ascent through the mantle wedge. This is interpreted to indicate that the Pulang Cu deposit and associated magmatism can be linked to the synchronous westward subduction of the Ganzi–Litang oceanic lithosphere, which has been established as Late Triassic.

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