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Geochemistry, U – P b Geochronology and H f Isotope Studies of the Daheishan Porphyry M o Deposit in H eilongjiang Province, NE C hina
Author(s) -
Hu Xinlu,
Yao Shuzhen,
He Mouchun,
Ding Zhenju,
Cui Yubao,
Shen Jun,
Chen Bin,
Zhu Bopeng
Publication year - 2014
Publication title -
resource geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 43
eISSN - 1751-3928
pISSN - 1344-1698
DOI - 10.1111/rge.12031
Subject(s) - porphyritic , geology , geochemistry , zircon , geochronology , hornfels , partial melting , mineralization (soil science) , isotope , crust , biotite , quartz , paleontology , soil science , soil water , physics , quantum mechanics
The D aheishan porphyry M o deposit was recently discovered in the northern segment of the G reat X ing'an R ange, NE C hina. Three main types of granitoids are identified in this deposit: granodiorite, fine‐grained granite, and porphyritic granite. The orebodies are dominantly hosted within the granodiorite and in the contact zone between the granodiorite and tuff or hornfels, while no mineralization has been found in the fine‐grained granite or the porphyritic granite. We present in situ LA‐ICP ‐ MS zircon U ‐ P b dates for the granodiorite, fine‐grained granite, and porphyritic granite, which yielded 146.9 ± 1.1 Ma (2σ), 146.6 ± 1.7 Ma (2σ), and 149.7 ± 4.2 Ma (2σ), respectively. Their ε Hf (t) values range from 3.9 to 12.2, associated with young crustal model ages ( T DM2 ) ranging from 524 Ma to 849 Ma, indicating that their parental magmas may have been generated by partial melting of the N eoproterozoic– C ambrian crustal components. The formation of the D aheishan deposit was genetically related to the subduction of the P aleo‐ P acific Plate.