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Ding Z.,Shandong Provincial 3rd Exploration Institute of Geology and Mineral Resources | Ding Z.,Jilin University | Sun F.,Jilin University | Liu J.,Chinese Academy of Geological Sciences | And 5 more authors.
Acta Petrologica Sinica | Year: 2012

The Xingjiashan molybdenum-tungsten deposit, located in the intersection between North China block and Yangtze block, is a large-scale skarn-type deposit in the North Fushan ore field. It belongs to the regional multi-metal metallogenetic series related to the Early Yanshanian granitoid magmatic actions. In this study, in order to restrict the timing of mineralization, direct Re-Os isotopic dating on molybdenites collected from the skarn ore in the Xingjiashan molybdenum-tungsten deposit have been carried out. The results of Re-Os isotopic dating show that the Re-Os model ages range from 156. 91 ± 1. 78Ma to 160. 70 ± 1. 66Ma, with an average of 158. 91 ± 1. 91Ma, and give an isochron age of 158. 70 ±2. 06Ma. Combined with the zircon SHRIMP U-Pb age of 158. 53 ± 0. 79Ma of the Early Yanshanian granite, it is suggested that the mineralization of the regional molybdenum-tungsten is temporally and genetically related to the granite in the area, and the large-scale re-melting granitoid magma might provided the major metallogenetic materials and hydrotherm. Based on the results of Re-Os isotopic dating presented in this study and available isotopic data published in previous studies, we suggest that the mineralization in the Jiaodong Peninsula since Mesozoic could be divided into four mainly phases: the first is the copper-molybdenum multi-metal mineralization phase at ca. 165 ∼ 155Ma: the second is the gold mineralization phase at ca. 137 ∼ 110Ma: the third is the copper-molybdenum-lead-zinc multiple metal mineralization phase at ca. 120 ∼110Ma: and the fourth is the gold-silver-lead-zinc multi-metal mineralization phase at ca. 100 ∼75Ma. They are respectively responding to the multiphase granitoid magmatic actions during Early-Late Yanshanian.

Ding Z.,Shandong Provincial 3rd Exploration Institute of Geology and Mineral Resources | Ding Z.,Jilin University | Ding Z.,Key Laboratory of Gold Metallogenic Process and Resources Utilization | Sun F.Y.,Jilin University | And 6 more authors.
Acta Petrologica Sinica | Year: 2013

The Weideshan area, located in the Ludong district of the Sulu-Dabie Orogen, is a very important polymetallic mineralization zone. There are a series of medium-and small-sized Mo-Cu-Pb-Zn-Au-Ag polymetallic deposits (occurrences) distributed in and around the Weideshan granite, which is the main rock in the area. The U-Pb dating of the zircons of the mineralization granites from two typical deposits were measured, and all the zircons are magmatic origins. The weighted average U-Pb ages of the zircons from the two granites are separately 113.4 ± 1.8Ma and 114.2 ±2.1Ma, identical with the results (108 ±2Ma, 117.7 ±2.9Ma ∼113.4 ± 2.5Ma) by zircon SHRIMP technique measured before. Based on the studies on the difference between the granites and the related mineralization forming age in East China, it was suggested that the copper and molybdenite mineralization in Weideshan area was about HOMa, belong to the Yanshanian polymetallic deposits metallogenetic series. Coupled with previous researches, it was suggested that the petrologenesis and metallogenesis in Weideshan area was probably the result of crust-mantle interactions under the geodynamic setting of the lithospheric thinning and extension.

Ding Z.,China University of Geosciences | Ding Z.,Shandong Provincial 3rd Exploration Institute of Geology and Mineral Resources | Ding Z.,Key Laboratory of Gold Metallogenic Process and Resources Utilization | Sun F.,Jilin University | And 8 more authors.
Acta Petrologica Sinica | Year: 2015

The Jiaodong area is located in the conjunctional site of the Paleotethys and the Pacific metallogenic domains, and experienced strong Mesozoic tectonic-magmatic activities and metallogenisis of major metal deposits. In this paper, based on a comprehensive analyses and identification on tectonic setting of major Mesozoic magmatisms and metallogenic type of typical deposits, combined with the geological and structural features in the Jiaodong area, we conclude that the geodynamic evolution of the metallogenisis is manly controlled by the collisional orogeny of the Yangtze and the North China plates as well as subduction of the Paleopacific plate, and further divide it into six periods of continental collisional orogen in Late Triassic, transformation from passive to active continental margin and crustal accretion in Middle Jurassic, transformation from crust accretion to collapse in Early Cretaceous, large-scale delamination of lithosphere and intense crust-mantle interaction in Early Cretaceous, subduction of the continental margin arc, and intense extension of post-arc lithosphere in Late Cretaceous, corresponding to six phases of gold and polymetallic metallogenisis: ∼205Ma, 160 ∼ 155Ma, 135 ∼ 125Ma, 125 ∼ 115Ma, 115 ∼ 100Ma and 100 ∼ 90Ma, respectively. The precious and nonferrous deposits which formed in the six periods of metallogenisis show regular spatial and temporal distribution, and roughly include six metallogenic series, nine sub-series and sixteen deposit types, which can be subdivided into seven precious and nonferrous metallogenic zones (belts) from west to east: the western Laizhou, Zhaoyuan-Pingdu, Qixia-Penglai-Fushan, the northeastern margin of the Jiaolai Basin, Muping-Rushan, Wendeng-Weihai, and Rongcheng. In general, in the Jiaodong area, orogenic gold deposits are still prospecting focal targets, and the exploration of the porphyry-type nonferrous deposits are potential to make breakthroughs. Meanwhile, we should also pay enough attention into the meso-epithermal multiple-metal deposits.

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