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In Situ Analyses of Trace Elements, U–Pb and Lu–Hf Isotopes in Zircons from the Tongshankou granodiorite porphyry in Southeast Hubei Province, Middle-Lower Yangtze River Metallogenic Belt, China

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Acta Geologica Sinica(English Edition) 2015年第5期89卷 1588-1600页

作者： XIA Jinlong HUANG Guicheng DING Lixue CHENG Shunbo Wuhan Center China Geological Survey Research Center of Granitaic Diagenesis and Mineralization China Geological Survey

The Tongshankou Cu-Mo deposit, located in southeast Hubei province, is a typical skarn–porphyry type ore deposit closely related to the Tongshankou granodiorite porphyry, characterized by a high Sr/Y *** in situ analyses of the trace elements and U–Pb and Lu–Hf isotopes in zircons from the Tongshankou granodiorite porphyry were *** any inherited zircons were observed, and the analyzed zircons yielded highly concordant results with a weighted mean 206Pb/238 U age of 143.5 ± 0.45 Ma（n=20, mean square weighted deviation was 0.75）, which was interpreted to represent the crystallization age of the Tongshankou granodiorite *** chondrite-normalized rare-earth element pattern was characterized by a slope that steeply rises from the light-group rare-earth elements（LREE） to the heavy-group rare-earth elements（HREE） with a positive Ce-anomaly and inconspicuous Eu-anomaly, which was coincident with the pattern of the zircons from the Chuquicamata West porphyry, *** analyzed zircons also had relatively low 176Hf/177 Hf ratios of 0.282526–*** t=143 Ma, the corresponding calculated initial Hf isotope compositions（εHf（t）） ranged from-5.6 *** results of the in situ analysis of trace elements and U–Pb and Lu–Hf isotopes in zircons from the Tongshankou granodiorite porphyry suggest that a deep-seated process involving a thickened-crust/enriched-mantle interaction may play an important role in the generation of high Sr/Y-ratio magma and potentially in the generation of porphyry Cu-Mo systems.

关键词： trace element zircon Hf isotope granodiorite porphyry Middle-Lower Yangtze River metallogenic belt

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A geochronological and geochemical study on the granodiorite porphyry and its implication for the mineralization in the Dayaoshan metallogenic belt,Southeastern China

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Acta Geochimica 2021年第1期40卷 106-122页

作者： Panfeng Liu Jiali Zhang Zhiqiang Wu Qingwei Zhang Meilan Wen Xianrong Luo Chaojie Zheng Wenbin Huang College of Earth Science Guilin University of TechnologyGuilin 541006China College of Environmental Science and Engineering Guilin University of TechnologyGuilin 541006China

A systematic study combining U-Pb zircon dating,lithogeochemical and Sr-Nd isotopic analyses was carried out upon the Xinping granodiorite porphyry in the Dayaoshan metallogenic belt to understand its petrogenesis and tectonic ***-ICP-MS U-Pb zircon dating yielded a 442.7±5.8 Ma age,indicating that the granodiorite porphyry was emplaced during the Llandovery Silurian of the Early *** granodiorite porphyry shares the same geochemical characteristics such as Eu negative anomaly as other syn-tectonic granite plutons in the region,including the granodiorite porphyry in Dawangding and granite porphyries in the Dali Cu-Mo deposit and Longtoushang old deposit,indicating a similar magma evolution *** Xinping granodiorite porphyry has high contents of SiO2(67.871.8%)and K2O(1.78-3.42%)and is metaluminous-peraluminous with A/CNK ratios ranging from 0.97 to 1.06,indicative of high-potassium calc-alkaline to calc-alkaline *** is a I-type granite enriched in large ion lithophile elements Rb,Sr,while depleted in Ba and high field-strength element ***,a collision between the Yunkai Block from the south and the Guangxi Yunnan-North Vietnam Block from the north during the Early Paleozoic was followed by uplifting of the Dayaoshan *** Xinping granodiorite porphyry was likely emplaced during the ***-Nd isotopic analyses show that the granodiorite porphyry has initial 87Sr/86Sr ratios(Isr)of 0.7080-0.7104,εNd(t)range from-0.08 to-4.09,and t2DM between 1.19 and 1.51 Ga,well within the north-east low-value zone of the Cathaysia block,indicating a Paleoproterozoic Cathaysia basement source and an involvement of under plating mantle *** observations,geochronological data,and 3D spatial distribution all lead to the conclusion that the Early Paleozoic Xinping granodiorite porphyry does not have any metallogenic and temporal relationships with the Xinping gold deposit(which has a Jurassic-Early Cretaceous age based on

关键词： U–Pb zircon geochronology Lithogeochemistry Sr–Nd isotopes granodiorite porphyry The Dayaoshan metallogenic belt

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Geology and mineralization of the Daheishan supergiant porphyry molybdenum deposit(1.65 Bt),Jilin,China:A review

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China Geology 2023年第3期6卷 494-530页

作者： Nan Ju Di Zhang Guo-bin Zhang Sen Zhang Chuan-tao Ren Yun-sheng Ren Hui Wang Yue Wu Xin Liu Lu Shi Rong-rong Guo Qun Yang Zhen-ming Sun Yu-jie Hao Shenyang Center China Geological SurveyMinistry of Natural Resources(Northeast Geological S&T Innovation Center)Shenyang 110034China Mining College Liaoning Technical UniversityFuxin 123000China Cores and Samples Centre of Natural Resources China Geological SurveyMinistry of Natural ResourcesLangfang 065200China Mudanjiang Natural Resources Survey Center China Geological SurveyMinistry of Natural ResourceMudanjiang 157000China Institute of Disaster Prevention Langfang 065200China College of Earth Sciences Jilin UniversityChangchun 130000China School of Earth Science and Resources Chang'an UniversityXi'an 710000China School of Resources and Civil Engineering Northeastern UniversityShenyang 110031China School of Prospecting&Surveying Engineering Changchun Institute of TechnologyChangchun 130000China

The Daheishan supergiant porphyry molybdenum deposit(also referred to as the Daheishan deposit)is the second largest molybdenum deposit in Asia and ranks fifth among the top seven molybdenum deposits globally with total molybdenum reserves of 1.65 billion tons,an average molybdenum ore grade of 0.081%,and molybdenum resources of 1.09 million *** main ore body is housed in the granodiorite porphyry plutons and their surrounding inequigranular granodiorite plutons,with high-grade ores largely located in the ore-bearing granodiorite porphyries in the middle-upper part of the porphyry ***,it appears as an ore pipe with a large upper part and a small lower part,measuring about 1700 m in length and width,extending for about 500 m vertically,and covering an area of 2.3 km^(2).Mineralogically,the main ore body consists of molybdenite,chalcopyrite,and sphalerite horizontally from its center outward and exhibits molybdenite,azurite,and pyrite vertically from top to *** primary ore minerals include pyrite and molybdenite,and the secondary ore minerals include sphalerite,chalcopyrite,tetrahedrite,and scheelite,with average grades of molybdenum,copper,sulfur,gallium,and rhenium being 0.081%,0.033%,1.67%,0.001%,and 0.0012%,*** ore-forming fluids of the Daheishan deposit originated as the CO_(2)-H_(2)O-NaCl multiphase magmatic fluid system,rich in CO_(2)and bearing minor amounts of CH4,N2,and H2S,and later mixed with meteoric *** various mineralization stages,the ore-forming fluids had homogenization temperatures of>420℃‒400℃,360℃‒350℃,340℃‒230℃,220℃‒210℃,and 180℃‒160℃and salinities of>41.05%‒9.8%NaCleqv,38.16%‒4.48%NaCleqv,35.78%‒4.49%NaCleqv,7.43%NaCleqv,and 7.8%‒9.5%NaCleqv,*** mineralization of the Daheishan deposit occurred at 186‒167 *** granites closely related to the mineralization include granodiorites(granodiorite porphyries)and monzogranites(monzogranite porphyries),which were mineralized after magma

关键词： Molybdenum deposit porphyry type granodiorite porphyry Crust-mantle mixing Metallization U-Pb age O-S-Pb isotope Re isotope Inclusion type Ore-bearing fluid Metallogenic model Prospecting model Mineral exploration engineering

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