Institute of Geological Survey

Nanchang, China

Institute of Geological Survey

Nanchang, China
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Wu X.-M.,China Geological Survey | Wen D.-G.,China Geological Survey | Wang E.-R.,Institute of Geological Engineering | Ni J.,Institute of Geological Survey | Zhang E.-Y.,China Geological Survey
Geological Bulletin of China | Year: 2010

To mitigate the sufferings of the local residents from water-shortage for their daily life in some villages and towns of western Liaoning province, China Geological Survey has carried out a comprehensive project on groundwater investigation, exploitation, and utilization since 2004. Several water supply works have been progressed successfully. This paper presented types of the groundwater-bearing structures in the region and their unique characteristics in terms of hydrogeology. These have been proven to play a fundamental role in locating effective water supply works. Some experiences for locating the water supply works based on the nature of these water-bearing structures were introduced.

Wen C.-H.,Institute of Geological Survey
Bulletin of Mineralogy Petrology and Geochemistry | Year: 2017

Pegmatite is widespread in southern margin of the Mufushan area. Mineralogy, major and rare metal elemental geochemistry of pegmatite have been carried out in this study in order to investigate ore potentiality of pegmatite and further to give assistance for rare metal explortion in the region. These pegmatites have high SiO2(71. 27% ∼ 76. 93%), variable Na2O(0. 68%∼7. 99%), K2O (0. 74% ∼ 10. 62%), K2O/Na2O (0. 09-13), Nb/Ta (0. 2-4. 7), K/Rb ratios (25. 42-139. 02). Whole rock geochemistry and mineral association suggest that these pegmatites have been subdivided into five different types; Potash pegmatite (I), plagioclase pegmatite (II) with xenotime and monazite mineralization, plagioclase-albite pegmatite(III), albite pegmatite(IV) and albite-spodumene pegmatite(V) with beryl, spodumene and niobium-tantalum mineralization. It is believed that rare metals mineralization is caused by albitization and spodumenization, which can be used as vector for ore prospecting.

Wang B.,Chengdu Institute of Geology and Mineral Resources | Wang B.,CAS Guangzhou Institute of Geochemistry | Chen L.,Wuhan University | Xu J.,CAS Guangzhou Institute of Geochemistry | And 3 more authors.
Acta Petrologica Sinica | Year: 2011

It is generally accepted that the post-collisional potassic and ultrapotassic magmatism are erupted from western to eastern in temporal in Lhasa block of Tibetan Plateau. However, this study has identified the potassic volcanic rocks from the Maqiang area in central of Lhasa block, which formed at ∼ 21. 3 Ma by 40Ar-39Ar dating. These potassic rocks are geochemical similar to ultrapotassic rocks, e. g., high in MgO (> 3%) and K2O/Na2O (K2O/Na2O > 2). The high MgO contents of potassic rocks in studying area caused for late-altered dolomite and they are more similar to potassic volcanic rocks although they show some "ultrapotassic" characteristics. Geochemically and tectonically, these potassic rocks in studying area are similar to the potassic-ultrapotassic rocks occurring along N-S rifts in the western Lhasa block. The enrichment in light rare earth elements (LREE), large ion lithophile elements (LILE, e. g., Rb, Ba and Th) and depletion in HFSE (e. g., Nb, Ta and Ti), and high initial 87Sr/86Sr and low εNd(t) values of the potassic rocks in studying area, indicated that they were probably generated by partial melting of a metasomatic enrichment mantle related to early subduction events. Recognition of the potassic rocks in the Maqiang area imply that post-collisional potassic-ultrapotassic magmtism did not migrate from west to east in the Lhasa block. In other words, the post-collisional potassic and ultrapotassic lava in the Lhasa block were might erupted at the same time. And we suggest that the formation of the Miocene potassic-ultrapotassic volcanic rocks and N-S rifts in the Lhasa block were probably triggered by slab break-off of the India continent lithosphere during northern intra-continent subduction in early Miocene.

Ai G.-H.,Jiangxi University of Science and Technology | Ai G.-H.,China University of Mining and Technology | Liu Y.-F.,Jiangxi University of Science and Technology | Wang Y.,Hefei Testing and Quality Supervision Center for Geological and Mineral Products | Chen Y.,Institute of Geological Survey
Journal of Residuals Science and Technology | Year: 2015

Heavy metals are a component of sulfide ore tailings, which may pose serious threats to environment and human health. This study focuses on physical and chemical properties of main mineral composition in a sulfide ore tailings impoundment and discusses a series of chemical reaction equations of the main minerals in tailings including FeS, Fe1-xS and Fe7S8. This study aims to examine migration rules of the heavy metal elements in the tailings. To further investigate the migration mechanism, experimental simulation was used to provide some bases for the release and migration law of heavy metals in tailings. © 2015 DEStech Publications, Inc.

Ai G.,Jiangxi University of Science and Technology | Ai G.,China University of Mining and Technology | Tao X.,China University of Mining and Technology | Wang Y.,Hefei Testing and Quality Supervision Center for Geological and Mineral Products | Chen Y.,Institute of Geological Survey
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2011

In order to find out the distribution of ploycyclic aromatic hydrocarbons of aerosol (PM 10, PM 2.5) and standardize the system of beneficiation reagent and provide basis for monitoring air, five sampling areas were set up from June,2008 to October,2008, in the period.The researchers collected samples of (PM 10, PM 2.5) and pretreated them by the methods such as soxhelt extraction,concentrated by Kuderna-Danish concentrator and blowing high purity nitrogen in sequence. In addition, Gas chromatography and mass spectrometry(GC-MS) is used to ascertain Ploycyclic Aromatic Hydrocarbons of the pretreated samples in this paper. The results show that our analysis establishes some important results as follows: A total of thirty-five (PM 10, PM 2.5) samples were detected respectively and 16 kids of typical PAHs can are inspected in every samples,Levels of benzo[a] pyrene are in the range from 1.03 ng/m 3 to 23.35ng/m 3 (PM 10) and 0.24ng/m 3 to 18.75ng/m 3 ( PM 2.5),with an overall mean of 5.07 ( PM 10) and 3.91 ( PM 2.5). Indicate the serious pollution of ploycyclic aromatic hydrocarbons in the mineral separation plant,be harmful to health of workers and should be attached importance by corrective department. © 2011 IEEE.

Ni Z.,Institute of Geological Survey | Li X.,Institute of Geological Survey | Wen G.,Shandong Sixth Exploration Institute of Geology and Mineral Resources | Ma Z.,Shandong Institute of Geophysical and Geochemical Exploration | Wang Q.,Institute of Geological Survey
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2013

Based on 'metallogenetic series of mineral deposits' proposed by Chen Yuchuan, authors pick up five key prediction factors and establish regional predicting models combined with metallogenetic characteristics from typical deposits. By the methodology of deposit modeling and integrated geological information, four essential gold ore-forming factors are concluded, which are Mesozoic Linglong admellite and Guojialing granodiorite, ore-controlling and ore-forming factors caused by extensional tectonic environment under intensive subduction settings, Jiaodong intrusive rock within Jiaodong tectonic magma belt under magma arc tectonic background in continental margin, as well as NNE and NE ductile and brittle fault belt. The important ore-controlling factors of gold deposits are presented as follows, Jiaodong superficial rock system and Early-Paleozoic subducted additional complex, late-Yanshanian mineralization, natural gold and pyrite assemblage, and wall-rock alteration of potassium and beresitization. Besides, there are four clues indicating gold deposit, including regional gravity-magnetic anomalies, aeromagnetic anomalies, stream sediment anomalies and natural placer mineral anomalies. Authors used predicting models to plot prediction zone relying on integrated predicting factors. The boundaries of prediction zone are defined by ore-bearing texture, gold geochemical exploration, placer mineral abnormal features, gravity anomaly gradient belt, favorable magnetic field, etc. Moreover, the deep boundaries are further confirmed by the accurate scope of controlling-ore texture, controlling depth of proved ore bodies and possible extensional features of deep ore bodies. Total 63 predicting potential regions are proposed, including 17 A-grade ones, 11 B-grade ones and 35 C-grade ones. In addition, gold potential resources of total prediction zones are estimated quantitatively, which are 3 250 tons in less than 2 km depth according to different area, segment, depth and grade respectively.

Lin X.-Y.,Jilin University | Zhang W.-J.,Jilin University | He H.-Y.,Jilin University | Shi X.-F.,Jilin University | And 6 more authors.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2012

As a result of the water-rock interaction mechanism in artificial recharge process is more complex, the evaluation on influence of groundwater quality during the artificial recharge process is scarce.. The authors discuss the trends of solute component and their associated water-rock interaction during the artificial recharge process based on pilot scale experiments conducted in the laboratory.. Experiment results showed that: in the groundwater recharge process, the ion composition of groundwater were mainly affected by the mixing, cations exchange adsorption and aquifer mineral phase (calcite, dolomite, potassium feldspar) dissolution.. Due to the influence of underground anaerobic environment developing to the aerobic environment in the artificial recharge process, the elements of As, Cr, Fe in porous media has dissolved out.. Besides, the As-Fe element variation showed well correlation.. Along with the increase of artificial recharge time, the effect range of groundwater quality was increased.. And the chemical type of groundwater was changed from the initial Cl-HCO 3-Na to Cl-HCO 3-Na-Ca gradually during the recharge process..

Ai G.,Jiangxi University of Science and Technology | Ai G.,China University of Mining and Technology | Tao X.,China University of Mining and Technology | Wang Y.,Supervision Center for Geological and Mineral Products | Chen Y.,Institute of Geological Survey
2011 International Conference on Electric Technology and Civil Engineering, ICETCE 2011 - Proceedings | Year: 2011

The mineral processing wastewater of sulfide ore is easily cause environment pollution, because it contains xanthate. This thesis applied the combined technology of ultrasound and Fenton reagent to deal with the artificial and actual mineral processing wastewater, in terms of the effects of pH value, H2O2 and Fe2+ concentration on the removal efficiency of xanthate. The results showed that combined ultrasound with Fenton reagent has the synergistic effect, the removal efficiency is better than use ultrasound and Fenton reagent singly. For dealing with the xanthate simulated wastewater, which concentration is 120 mgL1, on the condition of concentration of H2O2 is 20 mgL1, concentration of Fe2+ is 12 mgL1, initial pH of wastewater is 4, the removal of xanthate rate attains up to 96.8%; and for dealing with the actual mineral processing wastewater, on the condition of pH is 3, concentration of H2O2 is 24 mgL1, concentration of Fe 2+ is 18 mgL1, the removal of xanthate rate attains up to 97.6%, which meet the standard for discharge of xanthate wastewater. At last, this thesis discussed the mechanism of the xanthate was degraded by combined technology of ultrasound and Fenton reagent. © 2011 IEEE.

Zhang L.,Wuhan University | Wang Q.,Wuhan University | Chen N.,Wuhan University | Chen N.,University of Hong Kong | And 4 more authors.
Journal of Asian Earth Sciences | Year: 2014

The Delingha paragneiss suite in the Quanji massif, southeastern Tarim Craton, is composed of mica schist, paragneiss, leptynite and quartzite, similar to the 'khondalite suites' described from elsewhere in the world. The mica schist is rich in Al2O3 (up to ~26wt%) and contains graphite and diagnostic minerals including sillimanite and garnet, with metamorphism under amphibolite-facies to locally granulite-facies conditions as manifested by association with amphibolite and granulite. The detrital zircon U-Pb ages and geochemical data indicate that the protolith materials of the Delingha paragneiss suite were mainly sourced from 2.20 to 2.45Ga granites, felsic volcanic rocks and TTG, and were deposited at 2.17-1.92Ga. The detrital zircon Hf and whole-rock Nd isotopes document important crustal growth at ~2.5-2.7Ga. The detrital zircon age spectra, the whole rock Nd and zircon Hf model ages, the low-maturity of the protolith, and short-distance transportation suggest that the detritus were derived from the underlying Delingha Complex and the lower Dakendaban sub-Group. The timing of magmatic activities in the source region, the depositional age and metamorphic histories of the Delingha paragneiss suite are all comparable to those recorded in the khondalite belt along northern margin of the Ordos Block in the North China Craton. Our study shows that the 2.2-2.45Ga magmatic rocks were generated in arc or active continental margin settings, suggesting a prolonged subduction and accretion history prior to final amalgamation (~2.5-1.8Ga) to form the unified North China Craton and the assembly of the Tarim Craton in NW China. © 2014 Elsevier Ltd.

Zhong Y.,Wuhan University | Ma C.,Wuhan University | Liu L.,Bureau of Mineral Resources | Zhao J.,Wuhan University | And 3 more authors.
Lithos | Year: 2014

Palaeozoic mafic igneous rocks are potentially significant in constraining the tectonic nature and evolution of the Kwangsian Orogeny in the eastern South China Block, yet they have received little attention because of their limited outcrop. Geochemistry and geochronology was carried out on newly identified Ordovician ultramafic-mafic appinites in the Wugongshan Domain of the Cathaysia Block. Seven appinite samples yielded 206Pb/238U crystallisation ages ranging from 452±4Ma to 473±3Ma. Abundant 480-500Ma zircon xenocrysts and/or inherited zircons were found in the appinites, possibly indicating an earlier magmatism episode in the early Palaeozoic period. The Wugongshan appinites are ultramafic to mafic in composition, and the ultramafic rocks display features of cumulates (high concentrations of MgO, Fe2O3t, Cr, Ni, and low concentrations of total alkali and total rare earth elements [REE]). The appinite geochemistry displays: relatively flat chondrite normalised REE patterns with slight enrichment in light REE and weak negative Eu anomalies; enrichment in large-ion lithophile elements (such as Rb, K), and weak depletion in Nb-Ta in primitive mantle normalised trace element patterns. We suggest that the Wugongshan appinites likely originated from an ancient metasomatised mantle, and that crustal assimilation, fractional crystallisation (AFC), magma mingling and hydration were involved in the petrogenetic process, based on the combination of geochemistry, crust-like bulk Sr, Nd and zircon Hf isotopic compositions (εNd (t)=-8.2 to -3.2, initial 87Sr/86Sr ratios of 0.7067-0.7144, zircon εHf (t) values peaking at -9 to -3) and regional geological data. Further considering the alignment and chronology of the appinites, we suggest that the appinitic magmas probably were emplaced along the Jiangshan-Shaoxing Fault in a local extensional zone in an intracontinental regime in the early Palaeozoic. © 2014 Elsevier B.V.

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