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Isotope tracers for deep-seated fluids and noble gases

Chinese Journal Of Geochemistry 2013年第2期32卷 195-202页

作者： wang baode NIU Shuyin SUN Aiqun ZHANG Jianzhen wang Xiang wang Chuen Institution of Geological Survey Shijiazhuang University of Economics Qingdao Institute of Geological Engineering and Exploration

The role of He and Ar isotopes in tracing the source of ore fluids has aroused great attention of the broad masses of the geological researchers. On the basis of lots of test and measurement of He and Ar isotopes in sulfides from Au, Ag polymetallic ore deposits in northern China, statistics has been made on the published He and Ar isotope data from 27 gold deposits, 13 silver polymetallic ore deposits, 8 polymetallic ore deposits, 1 rare-earth deposit, 3 oceanic incrustations, 3 volcanic springs and their wall rocks and granites. The statistical results indicate that the 3 He/ 4 Ar (×10-6 ) values of the Au, Ag polymetallic ore deposits are within the range of 0.24 9.39, with an average of 3.34×10-6 ; the He/Ar values, 0.007 6.01,with an average of 2.37; the 40 Ar/ 36 Ar values, 265.75 2361, with an average of 699.0; the 4 He/ 40 Ar values, 0.0020 643.86, with an average of 5.85, the 3 He/ 4 Ar (×10-6 ) values of gneiss and granite surrounding the mining area, 0.001 1.79, with an average of 1.00×10-6 , reflecting great differences in source. Mantle-source He in 48 Au, Ag polymetallic ore deposits accounts for 4.55% 83.06%, averaging 29.91%. It falls near the mantle-source region which can be seen in the He isotopic concentration diagram and the 3 He/ 4 He(R/Ra) 40 Ar/ 36 Ar plot. Studies suggested that the ore-forming materials for endogenic Au, Ag polymetallic ore deposits should be derived from the deep interior of the Earth, and with the multi-stage evolution of mantle plumes the deep-seated ore fluids would be transported from the deep interior of the Earth to the shallow levels. During this process the mixing of crust/mantle-source fluids would inevitably occur, therefore, the value range always lies between the mantle and the crust.

关键词：成矿流体同位素示踪稀有气体银多金属矿床氦同位素氩同位素幔源流体地球内部

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Comparison between the Xishimen gold deposit and the Shihu gold deposit in western Hebei and analysis of the potential for ore exploration

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Chinese Journal Of Geochemistry 2011年第3期30卷 281-289页

作者： CHEN Chao NIU Shuyin wang Zili GUO Zhong SUN Aiqun wang baode GAO Yincang China University of Geosciences (Beijing) Beijing 100871 China Shijiazhuang University of Economics Shijiazhuang 050031 China Tianjin Kuakan Mining Industry Investment Co. Ltd. Tianjin 300181 China Shijiazhuang Comprehensive Geological Brigade Shijiazhuang 050081 China

The Xishimen gold deposit is located in the tectonic zone southeast to the Shihu gold deposit, both of which belong to the same orefield. Then, how is the prospecting potential for the Xishimen gold deposit? A com-parison was made between the Xishimen gold deposit and the Shihu gold deposit on the basis of their geological background of metallogenesis, geological characteristics of the ore deposits, the sources of ore-forming materials, etc. The results showed that both the deposits possess many similarities in the respects mentioned above. And their met-allogeneses can be compared. Therefore, there is great potential for ore prospection in the periphery or at the deep levels of the Xishimen gold deposit. Ore exploration should be well programmed on the basis of a better dissection of the tectonic setting of the orefield. A breakthrough in ore prospection of the Xishimen gold deposit will be of great instructive significance in regionally geological prospecting.

关键词：找矿潜力金矿床石门潜力分析成矿地质背景西部河北矿床地质特征

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Endogenic Au-Ag polymetallic ore deposits and ore-bearing potentiality of strata

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Chinese Journal Of Geochemistry 2010年第4期29卷 407-415页

作者： wang baode NIU Shuyin SUN Aiqun XIE Yan LUO Yi LIU Hailong wang Yanhua Geological Survey Institute Shijiazhuang University of Economics Shijiazhuang 050031 China No.5 Geological Brigade Hebei Bureau of Geology and Mineral Resource Development and Exploitation Shijiazhuang 066000 China

The problem of ore-bearing potentiality of the strata involves metallogenic theory and ore-search *** of the spatial distribution of endogenic Au-Ag polymetallic ore deposits in North Hebei indicated that the strata in which ore deposits occurred range in age from Paleozoic,Proterozoic to *** addition the ore deposits are characterized as being strata-bound in *** arise and establishment of "extracting" viewpoint may be attributed to the following three reasons:1) influence by the idea of "ore-source bed";2) limitation of analytical techniques in the 1980s'(especially gold element);and 3) a small number of samples(sampling locations were mostly disturbed by mineralization).Studies have shown that ore-forming materials would most probably come from the deep interior of the ***-seated ore-bearing materials including Au-Ag polymetals were brought to the shallow levels by way of mantle plume-mantle sub-plume-mantle branch structure multi-stage evolution,finally leading to the formation of ore deposits.

关键词：银多金属矿床含矿地层地幔亚热柱找矿方向成矿理论空间分布地层性质地球深部

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Helium-argon isotopic tracing for the Pb-Zn-Ag polymetallic ore deposits in the central-south segment of the Da Hinggan Ling Range

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Chinese Journal Of Geochemistry 2008年第3期27卷 235-241页

作者： wang baode NIU Shuyin SUN Aiqun HU Huabin LIU Yaming GUO Lijun wang Shuo Geological Survey Institute Shijiazhuang University of Economics Shijiazhuang 050031 China Inner Mongolia Bureau of Geology and Mineral Resources Exploration Development Hohhot 010020 China

In recent years big strides have been made in the exploration of ores in the central-south segment of the Da Hinggan Ling Range,though some debates still exist on the metallogenesis and sources of ore-forming *** and other sulfides in direct relation to the Pb-Zn-Ag ore deposits were chosen for the He and Ar isotopic analysis of ore-forming fluids,and the first He and Ar isotope data have been obtained from the study region.3He/4He ratios in 14 samples collected from 7 mining districts are 2.17×10-6-12.52×10-6,averaging 6.86×10-6 and their R/Ra ratios are 1.56-9.01 Ra,averaging 4.37 *** projecting the data points onto the 3He-4He concentrations diagram,all the points fall near the mantle helium *** calculated mantle-source helium ratios are within the range of 19.58%-76.96%,with an average of 49.52%.Argon isotopic characteristics are close to those of mantle source,indicating that the ore-forming material was transport upwards via the multi-stage evolution of mantle plume and concentrated as ores in the favorable loci of mantle branch structures.

关键词：氦氩同位素合成矿石材料沉积物地幔分支结构

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On the metallogenesis of Dajing Cu-Sn-polymetallic ore deposit,Inner Mongolia,China

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Chinese Journal Of Geochemistry 2007年第4期26卷 394-401页

作者： NIU Shuyin SUN Aiqun wang baode LIU Jianming GUO Lijun HU Huabin XU Chuanshi College of Resources Shijiazhuang University of Economics Shijiazhuang 050031 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Bureau of Geological Mineral Resources Development of Inner Mongolia Hohhot 070020 China

The Dajing Cu-Sn-polymetallic ore deposit is famous for its large scale, abundant associated elements, narrow and closely-spaced development of ore veins and high grade, but exploration within the mining district and its deeper parts has revealed no Yanshanian rockbody. Therefore, there have been proposed a diversity of hypotheses on the genesis of the deposit. The authors, from the angle of mantle-branch structure, provided evidence showing that the mining district is located in the core of the Da Hinggan Ling mantle-branch structure, the multi-stage evolution of mantle plume paved the way for the ascending of deep-source ore fluids and these fluids extracted part of the ore-forming materials. Then, these ore-forming materials were concentrated in the favorable structural loci (e.g. structural fissures) to form ores. The orientation of ore-forming and ore-controlling fissures is closely related to the regionally structural stress field at the metallogenic stage. The zonation of Sn, Cu, Au, Ag, Pb, and Zn within the mining district appears to be related to metallogenesis and the crystallization temperature of ore-forming materials. Mineralization of Sn, Cu, Au, etc. which require relatively high crystallization temperature and pressure is in most cases recognized in the central part of the mining district, while that of Ag, Pb, Zn, etc. which require relatively low crystallization temperature and pressure is, for the most part, produced in the periphery of the mining district.

关键词：地幔支路结构中国内蒙古铜锡矿石

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Effects of Melt Thermal Treatment on A356 Alloy

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Journal of Materials Science & Technology 2003年第2期19卷 152-154页

作者： Jun wang, Shuxian HE, baode SUN and Yaohe ZHOUSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China Sch. of Mat. Sci. and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China

To increase the casting quality of hypoeutectic Al-Si alloys, the effects of melt thermal treatment on the solidification structure of the A356 alloy were analyzed by a factorial experiment, in which the overheated melt was mixed with the low temperature melt. Experimental results show that the elongation ratio and strength of the treated samples increase remarkably compared with the control sample. The primary dendrite size reduces dramatically and the dendrite changes from columnar to equiaxed, with a little change of the secondary dendrite arm spacing (SDAS). Combined with the measurement of the nucleation undercooling, it is concluded that the solidification structure and refining effect are dependent primarily on the low temperature melt. The refining mechanism is believed as a result of the multiplication of the nuclei in the melt thermal treatment procedure.

关键词： A356 Melt thermal treatment Solidification structure

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Metallogenic characteristics of the region of Northwest Hebei and analysis of ore prospecting potential in its peripheries

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Chinese Journal Of Geochemistry 2011年第1期30卷 1-13页

作者： SUN Aiqun NIU Shuyin wang baode HAN Yuchou WEI Minhui MA Baojun ZHAO Zhiyuan XIA Dong College of Resources Shijiazhuang Univerity of Economics Shijiazhuang 050031 China Department of Land and Natural Resources of Hebei Province Shijiazhuang 050081 China

The region of Northwest Hebei is an area where Au-Ag polymetallic ore depsits are concentrated in Hebei Province. There were divided the Au ore-concentrated region with the magmatic-metamorphic diamictite zone as the center and the perpheral cover-strata zone and Ag-polymetallic metallogenic zone along the line of Xuanhua-Songli-Chicheng. Research on mantle branch structure indicates that Au-Ag polymetallic ore-forming materials come mainly from the deep interior of the Earth. The ore-forming materials tend to migrate upwards through the multi-stage evolution of mantle plume, and are concentrated as ores in the favourable tectonic expansion zone of a mantle branch structure. As viewed in plane, from the center to the periphery and as viewed in space, from the lower part to the upper part there exists Au-Ag-Pb-Zn zonation, as evidenced by drilling data from a number of mines. So, there is still great potential for ore prospecting in the region of Northwest Hebei.

关键词：成矿地质特征冀西北地区找矿潜力银多金属矿多金属成矿带地球深部成矿物质多级演化

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Source of ore-forming material for the Huangtuliang gold deposit,Hebei Province and ore prospecting in the deep periphery

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Chinese Journal Of Geochemistry 2008年第3期27卷 225-234页

作者： NIU Shuyin SUN Aiqun wang baode HAN Yuchou WEI Minghui ZHANG Hai ZHANG Ge SHI Ping wang Wenxing College of Resources Shijiazhuang University of Economics Shijiazhuang 050031 China Hebei Provincial Bureau of Geology and Mineral Resource Exploration and Development Shijiazhuang 050081 China Huangtuliang Gold Mine Chicheng County Zhangjiakou 075700 China

The Huangtuliang gold deposit is characterized by its wide and large ore belt,stable extension and closely spaced ***,no orebody was found by deep *** a result,ore prospecting in this region was once put into *** analysis of ore-forming and ore-controlling structures in the mining district by the authors has revealed that the ore-forming and ore-controlling structure in this mining district is a steeply dipping(85°-110°/∠70°-85° N-NNE),spade-shaped ductile shear zone,and the ore-controlling structures are a series of nearly erected second-ordered faults which are developed in the upper part of the ductile shear zone,intersecting with the ductile shear *** cutting of the ductile shear zone made it possible the ascending of ore fluids from the mantle plume at depth and these ore fluids would migrate upwards along the ductile shear zone under certain temperature and pressure *** their ascending path,the ore fluids would extract ore-forming elements from the country rocks and the extracted ore-forming elements would be deposited as ores in the hanging-wall second-ordered *** reason why no orebody was found in early prospecting at depth is that northward-dipping drilling in the southern part of the shear zone extended so deeply as to be beneath the shear *** shallow-level orebodies could be found by southward-dipping drilling practice in the northern part of the shear *** location where deep-seated orebodies occurred shifted northwards and the orebodies occurred at greater ***,it is natural that no orebody could be found when drill core passed through the shear *** the ore-forming and ore-controlling structures were well understood,the focus of ore prospecting was placed on the deep-level,northward-penetrating *** this way a number of new blind orebodies of great thickness have been *** the basis of research development in the mining district,a prospecting plan has

关键词：地幔分支结构地幔热流柱矿石河北

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Study on the Metallogenetism of Sub-mantle Plume and Mantle Branches in the Gold Mineralization Concentration Area of Northwest Jiaodong Peninsula

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Acta Geologica Sinica(English Edition) 2014年第5期88卷 1409-1420页

作者： NIU Shuyin CHENG Guangsuo ZHANG Jianzhen SUN Aiqun MA Baojun ZHANG Fuxiang wang baode XU Meng WU Jichun ZHAO Rongxin wang Shanfei Key Laboratory of Gold Mineralization Processes and Resource Utilization Subordinated to the Ministry of Land and Resources Shijiazhuang University of Economics Shandong Gold Group Co. Ltd.

The northwest of Jiaodong peninsula is characterized by its greatest gold concentration area, enormous gold reserves and limited time interval （115±5Ma） of gold mineralization in China. Studies show that the east area of north China began its mantle plume evolution since the Yanshanian movement, and the Laiyang sub-mantle plume and its surrounding mantle branches such as those in Guojiadian, Aishan and Panshidian were formed in the mineralization concentration area of northwestern Jiaodong peninsula. With the development of mantle plume →sub-mantle plume → mantle branch→ favorable expending structures, the deep-derived hydrothermal fluid moved up to the favorable places, such as brittle-ductile or ductile-brittle shearing zones, the internal and external contact zones of intrusions, dense fracturing zones and the contact zones between dikes and countryrocks, and concentrated into deposits. Then the gold mineralization concentration zones that are centralized on mantle branches were formed. This study takes Guojiadian mantle branch as an example to discuss their metallogenetism and conclude the metallogenetic mode.

关键词： sub-mantle plume mantle branch ore-controlling structure metallogenetism,metallogenetic mode northwest Jiaodong peninsula

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Analysis of the ore-controlling role of Guojiadian mantle branch structure,Northwest Shandong Peninsula,China

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Chinese Journal Of Geochemistry 2012年第4期31卷 414-423页

作者： NIU Shuyin Sun Aiqun ZHANG Jianzhen MA Baojun wang baode CHEN Chao ZHANG Fuxiang LIU Cheng ZHANG Xiaofei College of Resources Shijiazhuang University of Economics Shijiazhuang 050031 China College of Earth Science and Resources China University ofGeosciences Beifing 100083 China

Metallogenesis in the gold ore-concentrated zone of Northwest Shandong Peninsula is closely related to deep *** region in the eastern part of North China entered into the stage of mantle plume evolution during the Yanshanian movement,following the long-time stage of stable platform evolution during Paleozoic *** that time,the ore-concentrated zone of Northwest Shandong Peninsula just entered into the development-evolution stage of the Laiyang sub-mantle plume and the Guojiadian mantle branch structure in its *** core-mantle-source gold was present in the gas-liquid form,and it migrated through mantle plume→sub-mantle plume→mantle branch structure→favorable tectonic expansion zone to the favorable loci of the mantle branch structure,where gold was deposited as ores,thereafter constituting a series of large-to medium-sized gold deposits distributed around the Guojiadian mantle branch *** study also dealt with the Jiaojia fault as the main detachment(fault altered rock) belt on the northwestern margin of the mantle branch structure and also presented a basic cognition about the fact that the Sanshandao fault as the listric fault on the hanging wall of the detachment ***,on this basis,this study also pointed out the orientation for further ore prospecting in this region.

关键词：分支结构山东半岛地幔柱中国北方西北部控矿作用演化阶段焦家断裂带

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