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Ore-forming elements diffusion and distribution in the altered host rock surrounding the Koktokay No.3 pegmatite in the Chinese altay

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Acta Geochimica 2017年第2期36卷 151-165页

作者： Jingyu Zhao Hui Zhang Yong Tang Zhenghang Lü Yang Chen Key Laboratory of High-Temperature and High-Pressure Study of the Earth's Interior Institute of Geochemistry Chinese Academy of Sciences Guiyang 550081 China University of Chinese Academy of Sciences Beijing 100049 China Zhejiang University Hangzhou 310058 China

Petrography and geochemistry of the altered and unaltered host rocks surrounding the Koktokay No.3 pegmatite revealed that the unaltered amphibolite is mainly composed of hornblende, plagioclase, and *** these primary components, the altered host rocks contain a few newly formed minerals, including biotite,tourmaline, chlorine, and muscovite. The alteration zone surrounding the Koktokay No.3 pegmatite is limited to 2.0 m, characterized by biotitization, tourmalization, and chloritization. In the altered host rocks, the contents of SiO2, MgO, MnO, Na2O, and TiO2 did not vary ***, Al2O3 showed a weak decreasing trend with the increasing distance from the pegmatite contact zone, while Fe2O3 and CaO showed an increasing trend. The contents of Li, Rb, and Cs in the altered host rocks were much higher than those in the unaltered host rocks, decreasing with distance from the contact. The chondrite-normalized rare earth element（REE） pattern of the altered and unaltered host rock was right-inclined from La to Lu, but enriched in light REEs over heavy REEs after hydrothermal alteration. An isocon plot shows that some oxides migrated in with an order of P2O5〉K2O 〉TiO2〉Al2O3〉SiO2〉MnO≥MgO, while others migrated out with an order of Na2O 〉CaO 〉Fe2O3. For REEs, the migration ratios are positive values withCs 〉Rb 〉Li 〉Nb 〉Ta 〉Be, signifying that all REEs migrated from the exsolved magmatic fluid into the altered host rocks. It was concluded that diffusion was the only mechanism for migration of ore-forming elements in the alteration zone. The effective diffusion coefficients（Deff）of LiF, RbF, and CsF were estimated under a fluid temperature of 500–550℃. Using a function of concentration（C（x,t）） and distance（x）, the order of migration distance was determined to be LiF 〉CsF 〉RbF, with diffusion times of （3.39 ± 0.35）× 10^6,（3.19 ± 0.28） × 10^5 and（6.33 ± 0.05） × 10^5 years, respectively.

关键词： Rare elements Diffusion Alteration Koktokay No. 3 pegmatite altay

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Compositions and Pressure-Temperature Conditions of Metamorphic Fluids Overprinting the Talate VMS Pb-Zn Deposit,Southern altay,China

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Acta Geologica Sinica(English Edition) 2015年第3期89卷 794-810页

作者： ZHANG Hui XU Jiuhua CHENG Xihui GUO Xuji LIN Longhua YANG Rui BIAN Chunjing Resource Engineering Department University of Science and Technology Beijing No.706 Geological Party Xinjiang Geoexploration Bureau for Nonferrous Metals

The Talate Pb-Zn deposit,located in the east of the NW-SE extending Devonian Kelan volcanic-sedimentary basin of the southern Altaides,occurs in the metamorphic rock series of the upper second lithological section of the lower Devonian lower Kangbutiebao Formation（D_1k_1~2）.The Pb-Zn orebodies are stratiform and overprinted by late sulfide—quartz *** distinct mineralization periods were identified：a submarine volcanic sedimentary exhalation period and a metamorphic hydrothermal mineralization *** metamorphic overprinting period can be further divided into two stages：an early stage characterized by bedding-parallel lentoid quartz veins developed in the chlorite schist and leptite of the ore-bearing horizon,and a late stage represented by pyritechalcopyrite-quartz veins crosscutting chlorite schist and leptite or the massive Pb-Zn *** inclusions in the early metamorphic quartz veins are mainly CO_2-H_2O-NaCI and carbonic（CO_2±CH_4±N_2） inclusions with minor aqueous *** CO_2-H_2O-NaCl inclusions have homogenization temperatures of 294-368℃,T_（m,CO2） of-62.6 to-60.5℃,T_（h,CO2） of 7.7 to 29.6℃（homogenized into liquid）,and salinities of 5.5-7.4 wt%NaCl *** carbonic inclusions have T_（m,CO2）of-60.1 to-58.5℃,and T_（h,Co2） of-4.2 to 20.6℃.Fluid inclusions in late sulfide quartz veins are also dominated by CO_2-H_2O-NaCl and CO_2±CH_4 *** CO_2-H_2O-NaCl inclusions have T_（b,tot） of142 to 360℃,T_（m,CO2）of-66.0 to-56.6℃,T_（h,CO2） of-6.0 to 29.4℃（homogenized into liquid） and salinities of 2.4-16.5 wt%NaCl *** carbonic inclusions have T_（m,Co2）of-61.5 to-57.3℃,and T_（h,CO2） of-27.0to 28.7℃.The aqueous inclusions（L-V） have T_（m,ice） of-9.8 to-1.3℃ and T_（h,tot） of 205 to 412℃.The P-T trapping conditions of CO_2-rich fluid inclusions（100-370 MPa,250-368℃） are comparable with the late- to post-regional metamorphism *** CO_2-rich fluids,possibly derived from regional metamorphism,were involved in the reworking and metal enr

关键词： Fluid inclusion Talate Pb-Zn deposit Metamorphism altay

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New chronological evidence for Yanshanian diagenetic mineralization in China's altay orogenic belt

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Chinese Science Bulletin 2000年第2期45卷 108-114页

作者： Fuwen Chen Huaqin Li Denghong Wang Hong Cai Wen Chen Department of Geology Peking University Beijing China Yichang Institute of Geology and Mineral Resources Ministry of Land and Mineral Resources Yichang China Institute of Mineral Deposits Ministry of Land and Mineral Resources Beijing China Institute of Geology Ministry of Land and Mineral Resources Beijing China

Granitoids and related pegmatitic rare-metal deposits are widespread in China’s altay region,they used to be considered as Hercynian rocks and mineral *** here are the^40Ar^39Ar ages of potassium-rich minerals (muscovite and microcline)in the Koktokay pegmatitic rare-metal orefield and whole-rock as well as quartz fluid-inclusion Rb-Sr isochron ages of granite and ores in the Shangkelan pegmatite rare-metal orefield. The ages indicate that there are Yanshanian Diagenetic Mineralization events happening in China’s altay orogenic belt and that formation of the famous Koktokay No.3 pegmatitic rare-metal deposit endured about 30 Ma of magmatic crystallization differentiation.

关键词： Yanshanian diagenetic mineralization isochronological evidence altay orogenic belt.

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Geochemistry, Geochronology and Genesis of Gold Mineralization in Nurt of Northern altay, Xinjiang: A Case Study on the Aketishikan Gold Deposit

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Acta Geologica Sinica(English Edition) 2004年第2期78卷 562-567页

作者： YUANFeng ZHOUTaofa TANLugui LUOXianron YUEShucang SchoolofResourcesandEnvironmentEngineering HefeiUniversityofTechnologyHefeiAnhui230009

Gold deposits such as the Aketishikan, Togetobie, Tasbig-Kokeydlas, Kums and Hongshanzui gold deposits in the Nurt area in altay of Xinjiang were found in Member 3 rhyolite tufflava, fragmental lava and ignimbrite of the Carboniferous Hongshanzui Group. Trace and rare earth elements, sulfur, lead, oxygen and hydrogen isotopes, and geochronological studies indicate that the ore-forming material was mostly supplied by the Carboniferous volcanic rocks through water-rock interaction under a low-to-moderate temperature, and the hydrothermal ore-forming fluid came from meteoric water with some magmatic water input evolved from the granitic magmas. Gold deposits in the Nurt area as well as in the northern altay might form in multiple stages, and the Yanshanian mineralization period should be paid more attention besides the Variscan mineralization period.

关键词： gold deposit geochemistry geochronology Aketishikan altay Xinjiang China

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Massive Sulphide Deposits Related to the Volcano-Passive Continental Margin in the altay Region

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Acta Geologica Sinica(English Edition) 1999年第3期73卷 253-263页

作者： WANG Jingbin DENG Jiniu ZHANG Jinhong QIN Kezhang Beijing Institute of Geology for Mineral Resources State Bureau of Nonferrous Metal Industry Andingmenwai Beijing 100012

The Devonian volcano-passive continental margin in southern altay is a significant volcanogenic massive sulphide metallogenic belt. Acidic volcanism has been dominant on the inner side of the volcano-passive continental margin, i.e., near the old land, resulting in a Pb-Zn metallogenic sub-belt, in which the ore deposits are hosted by sedimentary rocks in volcanic series, as represented by the large Koktal Pb-Zn deposits. In the central part of the margin far away from the old land, bimodal volcanic formations are well developed, forming volcanics-hosted Cu-Zn metallogenic sub-belts, e.g., the large-scale Ashele Cu-Zn deposit. The Qiaoxiahala sub-belt on the outer side of the margin near the ocean ridge is located at the spreading central trough, where ophiolite suites are developed. This type of deposits is rich in gold and copper, similar to the Cyprus-type Fe-Cu-Au metallogenic sub-belt in metallogenic environment (represented by the Qiaoxiahala medium-scale Fe-Cu-Au deposit). From the old land to the ocean, the mineralizing age becomes younger, i.e., from Early Devonian→Early and Middle Devonian→Middle Devonian, forming a complete metallogenic zoning series on the volcano-passive continental margin. Comparative studies show that the massive sulphide deposits distributed on the volcano-passive continental margin are different from those formed under a plate subduction regime and oceanic ridge environment; the former have their unique features and wide distributions, representing a new type of volcanogenic massive sulphide deposits—the altay type.

关键词： volcano-passive continental margin massive sulphide deposit altay type Xinjiang

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Dating and Fluid Geochemistry of the Sarkobu Gold Deposit in altay, Xinjiang, China

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Acta Geologica Sinica(English Edition) 2004年第2期78卷 392-395页

作者： DINGRufu WANGJingbin ZHAOLunshan MAZhongmei ZHANGJinhong BeijingInstituteofGeologyforMineralResources Beijing100012／／InstituteofGeologyandGeophysicsChineseAcademyofSciencesBeijing100029 BeijingInstituteofGeologyforMineralResources Beijing100012 ChinaUniversityofGeosciences Beijing100083 No.706TeamofXinjiangGeologicalExplorationBureauforNonferrousMetals AltayXinjiang836500

The dating of fluid inclusions of quartz yields an Ar-Ar isochrone age of 320.4±6 Ma. Three types of fluid inclusions have been identified with the homogenization temperature ranging from 157℃ to 362℃. The homogenization temperature consists of two groups. The first group varies from 157℃ to 166℃, and the second from 232℃ to 362℃. Their chemical composition is dominated by Na+-Ca2+-Mg2+ and Cl-. The relative concentration of ions is characteristic by Na+>Ca2+>K+>Mg2+ and C1->SO42-> F-. The δD and δ18O values indicate that the ore-forming fluid originates from mixing of multi-source water. The Sarkobu gold deposit has experienced two mineralization stages: gold was enriched during the volcanic-exhalative-sedimentary process in the early stage, while the gold deposit was finally formed under compression-shearing during the orogenic period.

关键词： metallogenetic age genesis ore-forming fluid Sarkobu gold deposit altay Xinjiang

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Discovery of Mg-righ volcanic rock series in western altay area, Xinjiang and its geologic significance

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Chinese Science Bulletin 1999年第18期44卷 1685-1688页

作者： Hecai Niu Jifeng Xu Xueyuan Yu Fanrong Chen Zouping Zheng Chinese Acad Sci Guangzhou Inst Geochem Canton 510640 Peoples R China

A series of Mg-rich volcanic rocks, including rare Mg-rich dacites in the Asherle copper mine, western altay Area, has been found. This suite of Mg-rich volcanic rocks is characterized by high SiO2, MgO and low Ti contents. Compared with the island arc tholeiite and MORB, these rocks are depleted in HFSE and are therefore similar to boninite. The dacites show V-shaped distribution REE patterns whereas the basalts display flat or

关键词： Mg-rich volcanic rock Middle Devonian altay Xinjiang.

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Re-Os dating of the Kalatongke Cu-Ni deposit,altay Shan,NW China,and resulting geodynamic implications

Re-Os dating of the Kalatongke Cu-Ni deposit,Altay Shan,NW C...

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中国科学院地质与地球物理研究所2007学术年会

作者： Chunming Han~(a,*),Wenjiao Xiao~a,Guochun Zhao~b,Wenjun Qu~c,Andao Du~c * State Key laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China b Department of Earth Sciences,The Uttiversity of Hong Kong,Pokfulam Road,Hong Kong,China c National Research Center of Geoanalysis,Beijing,100037,China

Kalatongke is a large Cu-Ni deposit in the southern part of the altay orogenic belt,northwestern *** and osmium isotopic analyses of Ni- and Cu-bearing sulfide minerals from the deposit have been used to determine the timing of mineralization, the source of osmium,and,by inference,the source of ore *** ore samples have Os and Re concentrations varying in the ranges 0.29 to 3.07 ppb and 6.605 to 61.10 ppb,*** of these data yield a six-point isochron with an age of 305±15 *** initial

关键词： Re-Os isotopic dating Cu-Ni deposit Geodynamics Kalatongke altay China

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土耳其altay主战坦克

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兵器材料科学与工程 2017年第6期40卷 69-69页

作者：梓文

据美国陆军技术网站报道,altay是土耳其共和国第3代主战坦克,是国内首次为土耳其陆军司令部（TLFC）研制的主战坦克。土耳其国家主战坦克项目计划始于2005年,2010年9月完成方案设计。2015年完成首台样车,2016年8月土耳其Otokar公司提出A... 详细信息

据美国陆军技术网站报道,altay是土耳其共和国第3代主战坦克,是国内首次为土耳其陆军司令部（TLFC）研制的主战坦克。土耳其国家主战坦克项目计划始于2005年,2010年9月完成方案设计。2015年完成首台样车,2016年8月土耳其Otokar公司提出altay主战坦克批生产请求。

关键词：主战坦克土耳其 altay

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Geological Evolution and Huge Ore-Forming Belts in the Core Part of the Central Asian Metallogenic Region

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Journal of Earth Science 2016年第3期27卷 491-506页

作者： Yongfeng Zhu Fang An Wangyi Feng Huichao Zhang The Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking University Department of Geology Northwest University

The multi-stage geological evolution and extensive continental deformations during the course of its history make the Central Asian metallogenic region（CAMR） a unique and complicated large-scale metal domain. New geological observations and precise age-data allow an improved reconstruction of the geological evolution of the CAMR. This paper summarizes the Paleozoic orogenic evolution and related ore formation in the core part of the CAMR based on the geological data published both during the Soviet period and the last decades. Four ore-formation provinces（altay, BalkhashJunggar, Chu-Yili-Tianshan, and Southwest Tianshan） could be classified. The Balkhash-Junggar and Chu-Yili-Tianshan provinces are the major topics of this paper. The Balkhash-Junggar province consists of 4 huge ore-forming belts（Zharma-Saur, Tarbahtay-Xiemistay, Aktogay-Baerluke, Balkhashwestern Junggar） with 11 large ore-college areas. The Chu-Yili-Tianshan province consists of 4 huge ore-forming belts（Alatau-Sairimu, Chu-Yili-Bolehuole, Issyk-Awulale, Kazharman-Nalaty） with 22 large ore-college areas. Formation of large ore-college area corresponds to a specific stage of continental crust growth. Comparison of geology and ore deposits in the CAMR provides rich information for future exploration and understanding of ore-forming processes. The Paleo-Junggar Ocean closed at Early Devonian in the Balkhash-western Junggar ore-forming belt. Afterwards, widespread volcanic- sedimentary rocks formed at extensional stage due to delamination of the thick lower crust formed during previous accretionary processes. Felsic magma intrusion caused formation of porphyry Cu-Au deposit at ~310 Ma and related hydrothermal gold deposits about 10 Ma later. For example, in the Hatu-Baobei-Sartohay Au-Cr ore-college area in the Balkhash-western Junggar ore-forming belt, small granitic to diorite plutons and various dykes（312–277 Ma） and large granite bodies（~300 Ma） intruded into the Devonian to Early Carboniferous volcan

关键词： Central Asian Paleozoic ore altay Balkhash-Junggar Chu-Yili-Tianshan Southwest Tianshan

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