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Liang T.,General Research Institute for Nonferrous Metals, China | Liang T.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | Lu R.,General Research Institute for Nonferrous Metals, China | Lu R.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province
Geological Bulletin of China | Year: 2015

The Xiaomeihe rock mass lies in northern Xiaoshan Mountain. In this study, sample XMH01 of biotite quartz monzonite was analysed by LA-ICP-MS. 30 zircon spots were analyzed, and results of 23 spots are adjacent to 207Pb/235U-206Pb/238U in the concordia diagram, with U-Pb ages clustered in 2644~2695Ma, 2490~2546Ma, 2367Ma, 1844~1859Ma, 143.6Ma and 129.6~133.8Ma. The weighted average 206Pb/238U age of 9 zircon spots ranging from 129.6Ma to 133.8Ma is 131.5±0.9Ma, which is regarded as the formation age of the Xiaomeihe rock mass. The ages of total 23 U-Pb zircon spots of the Xiaomeihe rock mass formed a zircon age spectrum from late Archean to early Cretaceous, which recorded the corresponding regional magmatic theramal events. The Xiaomeihe rock mass is characterized by higher alkali and lower MgO. Compositional spots of the Xiaomeihe rock mass fall into the high-K calc-alkaline series. In chondrite-normalized REE patterns, the characteristics of LREE enrichment and HREE depletion without obvious Eu anomaly have been shown. The (La/Yb)N ratios are from 18.36 to 24.78. In the spider diagram, negative anomalies of Nb, Ta, P and Ti are displayed. Samples of the Xiaomeihe rock mass have higher Sr and lower Yb and Y, suggesting adakitic granite. The Xiaomeihe rock mass originated from partial melting of the thickened lower crust, and its residual phases of partial melting source included garnet and rutile. The Xiaomeihe rock mass was the product of lithosphere delamination in the early Cretaceous, and magma (fluid) mixing triggered by it formed the zircon U-Pb age spectrum. The formation of the Xiaomeihe rock mass was close to the Early Cretaceous extensive and intense mineralization and diagenetic epoch of Xiaoqinling-Xiaoshan Mountain-Xiong'er Mountain area, during which deep fluids were rapidly discharged in the process of lithosphere delamination. It is concluded that the Xiaomeihe rock mass possesses endogenetic metallogenic potential and hence should be considered as one of the prospecting targets in northern Xiaoshan Mountain area. ©, 2015, Editorial Office of Geological Bulletin of China. All right reserved. Source


Lu R.,General Institute of Nonferrous Metals Geological Exploration | Lu R.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | Liang T.,General Institute of Nonferrous Metals Geological Exploration | Liang T.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | And 7 more authors.
Geology in China | Year: 2014

In order to study petrogenesis, geodynamics and mineralization potential of small intermediate-acid igneous bodies in north Xiaoshan Mountain, the authors determined the age and geochemical compositions of Longwogou granite body, which is one of these igneous bodies. Longwogou body is composed of porphyritic biotite monzonitic granite with extensively distributed K-feldspar megacrysts. 206Pb/238U ages of 30 zircons by LA-ICP-MS method are from 125 Ma to 132 Ma, and the weighted average age is (128±1) Ma. Longwogou granite is characterized by higher SiO2and alkali, enrichment of K2O, and lower MgO and CaO. Compositional spots of Longwogou granite fall into high-K calc-alkaline series in the SiO2-K2O diagram. A/CNK ratios of Longwogou granite are from 1.00 to 1.11. According to the petrologic and geochemical features of Longwogou granite, it belongs to K-rich calc-alkaline granite (KCG). In chondrite-normalized REE patterns, Longwogou granite samples have shown the characteristics of LREE-enrichment and HREE depletion without obvious Eu anomaly. The (La/Yb)nratios of Longwogou granite are from 18.55 to 26.92. In spider diagram, the enrichment of Rb, Th, and trough of Nb and Ta are displayed. Samples of Longwogou granite have higher Sr and lower Y, and the Sr/Y ratios are in the range of 30.8-60.8, suggesting that Longwogou granite is adakitic granite. Longwogou granite originated from partial melting of the thickened lower crust, and its residual phases of partial melting source included garnet, rutile and hornblende. North Xiaoshan Mountain area underwent lithosphere delamination in early Cretaceous, and it was one of geological responses to huge lithosphere thinning of eastern China in Mesozoic. The formation age of Longwogou body falls into the time interval of extensive and intensive endogenetic mineralization in east Qinling orogen belt. Samples from Longwogou body display obvious enrichment of Au, Ag, Mo and W. It is considered that Longwogou granite and its concealed part have large mineralization potential. Source


Liang T.,General Research Institute for Nonferrous Metals, China | Liang T.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | Bai F.-J.,General Research Institute for Nonferrous Metals, China | Bai F.-J.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | And 8 more authors.
Northwestern Geology | Year: 2014

There are 121 endogenetic metal deposits and mineralizaion spots found in Xiongershan of western Henan province, which are distributed in the west of 112°E. On the east side of this longitude, however, no endogenetic metal mineralization has been found until now. So the longitude may have a great significance to the ore prospecting direction in this area. LA-ICP-MS zircon U-Pb dating is conducted on Banzhusi granitic porphyry, whose outcrop proportion takes up most of the area eastern of longitude 112. Values of 29 zircon measuring points from sample BZS01 are analyzed in total, and all of them are in concordance in the 207Pb/235 U-206 Pb/238U diagram, whose 206Pb/238U ages change between 124Ma and 138 Ma. The weighted average age of 28 analyzed spots is 129±1 Ma, suggesting that the ore body was formed in early Cretaceous. The research also indicates that Banzhusi rock mass is the product of lithosphere delamination, and its age falls into the time interval of extensive and intensive endogenetic mineralization in east Qinling orogenic belt. Samples from Banzhusi ore body have displayed abnormal enrichment in Au, Ag, Pb and Zn, from which it can be considered that Banzhusi ore body possesses endogenetic mineralization potential. Source


He X.-Y.,Henan Institute of Non Ferrous Metal Exploration | He X.-Y.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | Wang X.-G.,Henan Institute of Non Ferrous Metal Exploration | Wang X.-G.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | And 3 more authors.
Wutan Huatan Jisuan Jishu | Year: 2014

This paper introduced the soil geochemical anomalies characteristics of AF deposit in Chile. The results showed that SOLE region has geochemical characteristics of porphyry copper deposits. Considering the metallogenic belt in which the deposit locate and the geology characteristics, the genetic types of deposit is thought to be porphyry type in this area. Geophysical survey and drilling are proposed to get the mineralization information of the depth in SOLE region, and then to judge the genetic types of the deposit and the exploration prospecting more clearly. Source


Xia H.,General Institute for Nonferrous Metals and Geological Exploration of Henan Province | Xia H.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | Wang X.-Q.,General Institute for Nonferrous Metals and Geological Exploration of Henan Province | Wang X.-Q.,Key Laboratory of Deep Ore Prospecting Technology Research for Non Ferrous Metals of Henan Province | And 8 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2016

The influence of high content carbon on determination of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc in high carbon dedusting ash was focused on and discussed. Meanwhile, the problem of carbon removal was also solved. After the carbon in dedusting ash sample was removed by high temperature in muffle furnace, the ashes were dissolved by hydrochloric acid-nitric acid-hydrofluoric acid-perchloric acid. Then, the analytical lines and background deduction mode of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc were selected. Consequently, a determination method of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc in high carbon dedusting ash was established by inductively coupled plasma atomic emission spectrometry(ICP-AES). Under the optimal working conditions of instrument, the linear correlation coefficients (r) of calibration curves were all higher than 0.999 5. The detection limits of method were in range of 1.08-26.01 mg/kg. The proposed method was applied to the determination of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc in high carbon dedusting ash actual sample. The relative standard deviations (RSD, n=11) were between 0.90% and 7.1%. The recoveries were between 90% and 117%. The content of magnesium, aluminum, potassium, calcium and zinc in dedusting ash was determined by the experimental method, and the results were consistent with those obtained by flame atomic absorption spectrometry (FAAS). © 2016, CISRI Boyuan Publishing Co., Ltd. All right reserved. Source

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