1. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China 2. Key Laboratory for Geochemical Exploration Technology, MNR, Langfang 065000, China 3. Geological Surveying and Mapping Institute of Hebei Province, Langfang 065000, China
Aimed at the technical problem of ore-prospecting in transported overburden region, the authors carried out experimental studies of the method of thermalmagnetic component measurement in the known mining areas, which included the Caijiaying hydrothermal type lead-zinc-silver deposit in Hebei Province, the Shaquanzi magmatic copper-nickel sulfide deposit in east Tianshan, and the skarn type iron-copper polymetallic deposit in Yemaquan area. The experimental results of Caijiaying and Shaquanzi area show that, compared with the small and weak anomalies obtained by conventional soil measurement, the surface anomalies measured by thermal-magnetic components are significant, which can well reflect the spatial location and distribution pattern of deep orebodies and have the advantages of strengthening weak anomalies and discovering new ones. The results of the experiment in Yemaquan area show that there are anomalies delineated by thermomagnetic component measurement at the known mining areas with transported sediments covering more than 100 meters. And well matched abnormal elements in space provide a new target area for prospecting in the unknown area. It has been proved by experiments that the thermomagnetic component measurement technology provides an effective method for solving the problem of ore-prospecting in the transported covered region.
Zhang H, Kong M, Yang S P. Theories and methods of regional geochemical exploration in major landscape areas in China [M]. Beijing: Geological Publishing House, 2017.
[2]
Wang X Q, Zhang B M, Lin X , et al. Geochemical challenges of diverse regolith-covered terrains for mineral exploration in China[J]. Ore Geology Reviews, 2016,73:417-431.
[3]
Zhang B, Wang X, Ye R , et al. Geochemical exploration for concealed deposits at the periphery of the Zijinshan copper-gold mine, southeastern China[J]. Journal of Geochemical Exploration, 2015,157:184-193.
[4]
Zhang B, Wang X, Chi Q , et al. Three-dimensional geochemical patterns of regolith over a concealed gold deposit revealed by overburden drilling in desert terrains of northwestern China[J]. Journal of Geochemical Exploration, 2016,164:122-135.
Hu S Q, Ma S M, Liu C M , et al. Experiments on technical conditions of the Thermomagnetic technology and some related problems[J]. Geophysical and Geochemical Exploration, 2011,35(2):212-217.
Hu S Q, Shi C Y, Ma S M , et al. The application of thermomagnetic technique to ore prospecting in coverage area[J]. Geophysical and Geochemical Exploration, 2010,34(5):622-626.
Tang S X, Ma S M, Hu S Q . Application of soil magnetic component measurement technique in mineral prospecting in arid desert areas[J]. Mineral Exploration, 2012(6):804-810.
Tang S X, Ma S M, Li J J , et al. The availability discussion of magnetic material survey in dongtianshan, xinjiang[J]. Geophysical and Geochemical Exploration Computing Techniques, 2014,36(6):742-749.
Tang S X, Li J J, Ma S M . Optimum selection of geochemical exploration methods in areas covered by transported overburden, eastern Inner Mongolia[J]. Geophysical and Geochemical Exploration, 2018,42(3):499-505.
[10]
Cohen D R, Shen X C, Dunlop A C , et al. A comparison of selective extraction soil geochemistry and biogeochemistry in the Cobar area, New South Wales[J]. Journal of Geochemical Exploration, 1998,61(1):173-189.
[11]
Alipour S, Cohen D R, Dunlop A C . Characteristics of magnetic and non-magnetic lag in the Cobar area, NSW[J]. Journal of Geochemical Exploration, 1997,58(1):15-28.
[12]
Xie J, Dunlop A C . Dissolution rates of metals in Fe oxides: implications for sampling ferruginous materials with significant relict Fe oxides[J]. Journal of Geochemical Exploration, 1998,61(1):213-232.
Zhang Y X, Gu S Y . Geological structure study on caijiaying Pb-Zn-Ag deposit district of hebei province[J]. Journal of Guizhou University of Technology:Natural Science Edition, 2003(4):1-5.
Ye X D, Sun B B, Zhou G H , et al. Effectiveness and conditions tests of geo-electrochemical extraction in the caijiaying Pb-Zn polymetallic mining area,hebei province[J]. Geology and Exploration, 2018(5):979-987.
Feng Y L, Zheng C, Ai Y F , et al. Strucural characteristics of chlorite in the caijiaying Pb-Zn-Ag deposit[J]. Acta Mineralogica Sinica, 2001(3):554-556.
Shao Y . The study of the metallogenic zoning of ore deposits and its application in geochemical prospecting[J]. Geology and Exploration, 1984(2):47-55.
Li W M, Ren B C, Yang X K , et al. The intermediate-acid intrusive magmatism and its geodynamic significance in Eastern Tianshan region[J]. Northwestern Geology, 2002(4):41-64.
Huang X W, Qi L, Meng Y M . Trace element and REE geochemistry of minerals from Heifengshan, Shuangfengshan and Shaquanzi (Cu-)Fe deposits, eastern Tianshan Mountains[J]. Mineral Deposits, 2013(6):1188-1210.
Fang W X, Huang Z Y, Tang H F , et al. Lithofacies, geological and geochemical characteristics and tectonic setting of Late Carboniferous volcanic-sedimentary rocks in the Kumtag-Shaquanzi ar ea, East Tianshan[J]. Geology in China, 2006(3):529-544.
Xu L L, Chai F M, Li Q , et al. Geochemistry and zircon U-Pb age of volcanic rocks from the Shaquanzi Fe-Cu deposit in East Tianshan Mountains and their geological significance[J]. Geology in China, 2014(6):1771-1790.
Huang X W, Qi L, Wang Y C , et al. Re-Os dating of magnetite from the Shaquanzi Fe-Cu deposit, eastern TianshanNW China[J]. Science China: Earth Sciences, 2014(4):605-616.
Song Z B, Jia Q Z, Zhang Z Y , et al. Study on geological feature and origin of yemaquan Fe-Cu deposit in qimantage area, eastern kunlun[J]. Northwestern Geology, 2010(4):209-217.
Gao Y B, Li W Y, Qian B , et al. Geochronology, geochemistry and Hf isotopic compositions of the granitic rocks related with iron mineralization in Yemaquan deposit, East Kunlun, NW China[J]. Acta Petrologica Sinica, 2014(6):1647-1665.
Yao L, Lv Z C, Yu X F , et al. Mineral characteristics of granitic rocks from skarn deposits, Qimantag area, Qinghai Province, East Kunlun, and its geological significance[J]. Acta Petrologica Sinica, 2015(8):2294-2306.
Xu C K, Liu S B, Zhao Z J , et al. Metallogenic lawand and prospect direction of iron deposits in the east kunlun metallogenic belt in qinghai[J]. Acta Geological Sinica, 2012(10):1621-1678.
Liu J N, Feng C Y, Zhao Y M , et al. Characteristics of intrusive rock, metasomatites, mineralization and atteration in Yemaquan skarn Fe-Zn polymetallic deposit, Qinghai Province[J]. Mineral Deposits, 2013(1):77-93.