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Geochemical Characteristics and Significance of Major Elements, Trace Elements and REE in Mineralized Altered Rocks of Large-Scale Tsagaan Suvarga Cu-Mo Porphyry Deposit in Mongolia

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Journal of Rare Earths 2007年第6期25卷 759-769页

作者：方维萱杨社锋刘正桃韦星林张宝琛 Beijing Technological Center of Resource exploration China Non-Ferrous Metals Geological Survey State Key Laboratory of Deposit Geochemistry Chinese Academy of Sciences jiangxi Provincial non-ferrous metals geological Survey

The alteration types of the large-scale Tsagaan Suvarga Cu-Mo porphyry deposit mostly comprise stockwork silicification, argillization, quartz-sericite alteration, K-silicate alteration, and propylitization. The mineralized and altered zones from hydrothermal metallogenic center to the outside successively are Cu-bearing stockwork silicification zone, Cu-beating argillized zone, Cu-Mo-bearing quartz-sericite alteration zone, Cu-Mo-bearing K-silicate alteration zone, and pro- pylitization zone. The K-silicate alteration occurred in the early phase, quartz-sericite alteration in the medium phase, and argillization and carbonatization （calcite） in the later phase. Ore-bearing-altered rocks are significantly controlled by the structure and fissure zones of different scales, and NE- and NW-trending fissure zones could probably be the migration pathways of the porphyry hydrothermal system. Results in this study indicated that the less the concentrations of REE, LREE, and HREE and the more the extensive fractionation between LREE and HREE, the closer it is to the center circulatory hydrothermal ore-forming and the more extensive silicification. The exponential relationship between the fractionation of LREE and HREE and the intensity of silicification and K-silicate alteration was found in the Cu-Mo deposit studied. The negative Eu anomaly, normal Eu, positive Eu anomaly and obviously positive Eu anomaly are coincident with the enhancement of Na2O and K2O concentrations gradually, which indicated that Eu anomaly would be significantly controlled by the alkaline metasomatism of the circulatory hydrothermal ore-forming system. Therefore, such characteristics as the positive Eu anomaly, the obvious fractionation between LREE and HREE and their related special alteration lithofacies are suggested to be metallogenic prognostic and exploration indications for Tsagaan Suvarga-style porphyry Cu-Mo deposits in Mongolia and China.

关键词： mongolia tsagaan suvarga porphyry Cu-Mo deposit wall rock alteration fractionation mode positive Eu anomaly rare earths

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Geochronological Framework of Paleoproterozoic Intrusive Rocks and Its Constraints on Tectonic Evolution of the Liao-Ji Belt,Sino-Korean Craton

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Journal of Earth Science 2021年第1期32卷 8-24页

作者： Jingsheng Chen Zhongzhu Yang Dexin Tian Dehe Xing Lidong Zhang Fan Yang Bin Li Miao Liu Yi Shi Chao Zhang Shenyang geological Survey Center of China geological Survey Shenyang 110034China non-ferrous metals geological exploration bureau of Zhejiang Province Shaoxing 312000China

The Liao-Ji belt(LJB)is one of the Paleoproterozoic tectonic belts located in the North China Craton.A large number of Paleoproterozoic meta-volcanic-sedimentary rock and intrusive rocks are preserved in the LJB,which provide reliable carriers for the study of the Paleoproterozoic tectonic evolution of the North China *** Paleoproterozoic intrusive rock in the LJB can be divided into the following seven types:syenogranite,quartz diorite,porphyry granite,migmatitic granite,sye-nite,metamorphic plutonic rock,and granitic pegmatite and metagabbro(metamorphic diabase).Zir-con U-Pb dating of 15 samples from intrusive rocks was carried out in this *** chronology framework of the Paleoproterozoic intrusive rock in the LJB was established,and the magmatism of intrusive rocks can be divided into three stages:2200 to 2110,2010 to 1937,1900 to 1820 *** chronological framework supported the evolution model of subduction accretionary arc-continent colli-sion in the LJB *** with previous geochemical work,it was a passive continental margin environment at approximately 2200 Ma,and then transformed into and active continental *** bimodal intrusive rocks between 2180 and 2150 Ma indicated a back-arc tension envi-ronment which lasted until approximately 2110 Ma with a large number of basic intrusive *** then the back-arc basin began to contract and the magmatic activities were reduced,with only a small number of intrusive rock activities occurring at approximately 2040,2010 and 1937 *** the orogenic activities,there was a post-orogenic extension stage from 1900 to 1820 *** activi-ties caused by the environmental extension started to occur more frequently and subsequently resulted in the large-scale intrusive rocks in eastern Liaoning.

关键词： Liao-Ji belt Paleoproterozoic intrusive rocks geochronological framework tectonic evolution

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Two Zoning Patterns in Tin Deposits

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Acta Geochimica 1986年第4期5卷 391-400页

作者：王成发 jiangxi Provincial non-ferrous Metal geological exploration Company

Two zoning patterns in tin deposits are proposed according to geochemical environments. 1. Acidic zoning pattern is characteristic of tin deposits associated with sialic rocks and tin-bearing veinsin carbonate rocks. Six zones may be recognized from the granite mass outwards: (1) Nb-Ta-(Li-Be-Mo), (2)Sn, (3) W-(Sn), (4) Cu-Pb-Zn-(Bi), (5) Sb-Hg, and (6) Au-Ag. This kind of zoning is related with thetemperature difference involved in the deposition of various ore minerals ilx an acidic (or neutral) geochem-ical environment. From the granite outwards, the temperature decreases gradually with increasing distancefrom the heat source. 2. Alkaline zoning pattern is typical of tin deposits occurring in calcareous and magnesian carbonaterocks. Three zones can be recognized from the granite mass outwards: (1) Cu-Zn-Bi, (2) Sn, and (3)Fe-Pb-Zn-Cn. A calcium and magnesium rich alkaline environment is responsible for this zoning *** this case the normal sequence of mineral formation will be greatly changed owing to neutralization whenan acidic ore-forming solution enters the alkaline environment. Zoning structure in tin deposits is very complex and highly variable, depending on: (1) the geochemicalenvironment in which the deposits are formed, (2) the type of shield beds, and (3) the character of ore-forming solutions. However, there are some known examples showing similar zoning patterns for thedeposits that are similar in these three aspects.

关键词： Two Zoning Patterns in Tin Deposits Sn

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Characteristics of soure region and tectonic implications of Early Indosinian Weiya gabbroic rock,eastern Tianshan mountains

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Journal of Central South University of Technology 2008年第2期15卷 237-243页

作者：张遵忠顾连兴邵毅许建荣翟建平吴昌志郑远川唐俊华汪传胜三金柱 East China Mineral exploration and Development bureau for non-ferrous metals School of Environment Nanjing University State Key Laboratory of Mineral Deposit Research Department of Earth Sciences No.704 Brigade of Xinjiang Geoexploration bureau for non-ferrous metals

Based on the detailed petrographic study,the characteristics of source region of the Weiya gabbro and tectonic implications were *** results show that the gabbroic rock consists mainly of gabbro,with less amount of ultra-mafic *** ultra-mafic rocks show cumulate texture and are gradually transitional contact with gabbro,indicating that they are cumulate products of parental *** ultra-mafic rocks consist mainly of spinel periodite and spinel *** former is mainly composed of olivine(65%-70%),spinel(10%-15%),hornblende(5%-10%) and phlogopite(5%-10%);the latter consists mainly of clinopyroxene(70%-80%),spinel(15%-20%) and phlogopite(0-10%),with minor amounts of carbonate(0-2%).No olivine or orthopyroxene is *** gabbro is composed mainly of clinopyroxene(35%-40%),plagioclase(An 55-65,40%-45%),hornblende(5%-15%),with variable amounts of carbonate(0-5%).Petrographic observations show that the source region of the Weiya gabbroic rock is water-rich due to intensive intra-continental A-type subduction occurring in this region during late Permian to early Triassic.

关键词： petrography gabbro indosinian Weiya eastern Tianshan

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Metamorphic P-T conditions and ages of garnet-biotite schists in the Dahongshan Group from the southwestern Yangtze Block

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Acta Geochimica 2024年第4期43卷 707-718页

作者： Jun-xiao Ma Guang-shu Yang Yong-feng Yan Xiao-Fei Xu Yun-hua Ren Hui Zhao Xiao-jun Zheng Yuan Qin Faculty of Land Resources Engineering Kunming University of Science and TechnologyKunming 650093China geological Team 306 of Yunnan non-ferrous metals geological bureau Kunming 650217China Yunnan Provincial bureau of non-ferrous Geology Kunming 650051China

The Dahongshan Group,situated at the southwestern margin of the Yangtze Block,represents a geological unit characterized by relatively high-grade metamorphism in the *** paper investigates the garnet-biotite schist from the Laochanghe Formation of the Dahongshan Group,employing an integrated approach that includes petrological analysis,phase equilibrium modeling,and zircon U-Pb *** schist is mainly composed of garnet,biotite,plagioclase,quartz,rutile,and *** equilibrium modeling revealed the peak metamorphic conditions of 8-9 kbar and 635-675°*** further integrating the prograde metamorphic profile of garnet and geothermobarometric results,a clockwise P-T metamorphic evolution path is constructed,which includes an increase in temperature and pressure during the prograde ***-ICP-MS zircon U-Pb dating and zircon Ti thermometry constrains the post-peak metamorphic age of 831.2±7.2 *** with previously reported results,it is revealed that the southwestern margin of the Yangtze Block experienced a large-scale regional metamorphism during the Neoproterozoic(890-750 Ma),which is related to the collisional orogenic *** may be associated with the late-stage assembly of the Rodinia supercontinent or with local compression and subduction processes during the breakup of the Rodinia supercontinent.

关键词： Southwestern Yangtze Block Dahongshan Group Phase equilibrium modeling Zircon U-Pb dating Neoproterozoic metamorphism

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Characterization of a novel fluidic friction-reduction tool used in extended-reach well considering periodic particle-laden jet

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Petroleum Science 2023年第6期20卷 3700-3711页

作者： Lu-Bo Tang Xiao-Bin Chen Wei-Wei Xin Shao-He Zhang Xin-Xin Zhang School of Civil Engineering Central South UniversityChangsha410083HunanChina jiangxi geological exploration bureau for non-ferrous metals Nanchang330000JiangxiChina Key Laboratory of Metallogenic Prediction of nonferrous metals and geological Environment Monitoring(Central South University) Ministry of EducationChangsha410083HunanChina School of Geosciences and Info-Physics Central South UniversityChangsha410083HunanChina

Fluidic oscillators(FOs)can be used as an efficient fluidic vibration tool to solve high friction problems in extended-reach ***,the complex mechanism of FOs makes the design challenging,and the dynamic erosion behavior inside FOs is still *** this paper,new FOs are proposed and the working characteristics under the influence of periodic particle-laden jets are ***,the results reveal the working mechanism of new FOs,showing that the generation of pressure pulses is closely connected with periodic jet switching and the development of ***,the important performance parameters,i.e.,pressure pulse and oscillation frequency,are extensively studied through numerical simulation and experimental *** is found that the performance can be optimized by adjusting the tool structure according to different engineering ***,the oscillating solid-liquid two-phase flow inside FO is *** is demonstrated that the accumulation of particles leads to a significant reduction in *** results also reveal five locations that are susceptible to erosion and the erosion behavior of these locations are *** has been shown that the periodic jet causes fluctuations in the amount of erosion at the outlet and *** research can provide valuable references for the design and optimization of vibration friction-reduction tools.

关键词： Extended-reach well Fluidic oscillator Vibratory tool Erosion Friction reduction

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“Structure-Lithologic-Fluid” Metallogenic Coupling of the Wuzhishan Lead-Zinc Deposit in Puding, Guizhou Province

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 217-219页

作者： JIN Zhongguo ZHENG Minghong ZHOU Jiaxi HUANG Zhilong LIU Ling non-ferrous metals and Nuclear Industry geological exploration bureau of Guizhou Stake Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy Sciences

1 Introduction The Wuzhishan lead-zinc ore-concentrated area in Puding is located in the east of the Sichuan,Guizhou and Yunnan lead-zinc metallogenic domain,with the Youjiang-Nanpan River metallogenic province to the

关键词： rock Guizhou Province Metallogenic Coupling of the Wuzhishan Lead-Zinc Deposit in Puding Structure-Lithologic-Fluid

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Conodonts and Carbon Isotopes during the Permian-Triassic Transition on the Napo Platform, South China

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Journal of Earth Science 2019年第2期30卷 244-257页

作者： Yan Chen Qian Ye Haishui Jiang Paul B.Wignall Jinling Yuan State Key Laboratory of Biogeology and Environment Geology China University of Geosciences School of Earth Sciences China University of Geosciences non-ferrous metals geological exploration bureau of Zhejiang Province School of Earth and Environment University of Leeds

Two Permian-Triassic boundary(PTB) sections(Pojue and Dala) are well exposed in an isolated carbonate platform(Napo Platform) on the southwestern margin of the Nanpanjiang Basin, South China. These sections provide an insight into the transition across the PTB and a detailed investigation of the conodont biostratigraphy and inorganic carbon isotopes is presented. The PTB at the Pojue Section is placed at the base of Bed 10 B(a dolomitized mudstone found below a microbialite horizon), defined by the first occurrence of Hindeodus parvus. At the Dala Section, four conodont zones occur. They are, in ascending order, the Hindeodus parvus Zone, Isarcicella staeschei Zone, Isarcicella isarcica Zone and Clarkina planata Zone. Comparison with the Pojue Section suggests the PTB at Dala also occurs at the base of dolomitized mudstone below a microbialite horizon, although the first occurrence of Hindeodus parvus is near the top of a microbialite bed: an occurrence that is also seen in other platform sections. The succeeding microbialite beds developed during the ongoing PTB mass extinction phase. This time was characterized by low carbon isotope values, and a microbialite ecosystem that provided a refuge for selected groups(bivalves, ostracods and microgastropods) that were likely tolerant of extremely high temperatures.

关键词： Permian-Triassic Napo Platform conodont biostratigraphy carbon isotope

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Hydrothermal mineralization on Dengfuxian W-Sn-Pb-Zn orefield, SE China

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 243-244页

作者： XIONG Yiqu SHAO Yongjun ZHENG Minghong ZHOU Haodi WU Shichong ZHU Haofeng Key Laboratory of Metallogenic Prediction of nonferrous metals and geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South University non-ferrous metals and Nuclear Industry geological exploration bureau of Guizhou 416 geological Team Bureau of Geology and Mineral Exploration and Development of Hunan Province

1 Introduction Dengfuxian orefield lies at the intersection of the Qin-Hang Combined Zone(QCZ)and the Nanling Metallogenic,and comprises Xiangdong W-Sn deposit(Also known as Dengfuxian W-Sn deposit),Jiguanshi

关键词： Pb Sn Hydrothermal mineralization on Dengfuxian W-Sn-Pb-Zn orefield Zn

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Spectrum spatial structure characteristic analysis of remote sensing alteration information and interference factors

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Journal of Central South University 2009年第4期16卷 647-652页

作者：杨自安彭省临朱谷昌石菲菲邹林张远飞 China non-ferrous metals Resource geological Survey School of Geoscience and Environmental Engineering Central South University

Based on the statistical characteristics of remote sensing data, the spatial geometric structure characteristics of spectral data and distribution of background, interference and alteration information in characteristic space were researched through the analysis of two-dimensional and three-dimensional scatter diagrams. The results indicate that the hyper-space of remote sensing multi-data aggregation belongs to low-dimensional geometric structure, i.e. hyperplane form, and anomalous point groups including alteration information usually dissociate out of hyperplane. Scatter diagrams of remote sensing data band are mainly presented as two distribution forms of single-ellipse and dual-ellipse. Clarifying the relations of three objects of background, disturbance and alteration information in remote sensing images provides an important technical thought and guidance for accurately detecting and extracting remote sensing alteration information.

关键词： remote sensing data alteration information background interference factor spectrum spatial structure scatter diagram

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