Based on 1∶50 000 stream sediments survey and mathematical statistics of analytical results of 5 386 samples, the authors conducted an in-depth study of the geochemical characteristics of ore-forming elements of Qimen-Yixian area in Anhui Province. Through element geochemical characteristics analysis and R cluster analysis, the element combination was divided into three types, namely, high temperature anomaly, medium temperature anomaly and low temperature anomaly. The distribution law of combined anomalies shows polymetallic element enrichment in Qimen-Yixian area, mainly controlled by Yanshanian magmatic-tectonic mineralization system and Cambrian black rock series. On such a basis, six polymetallic metallogenic prospective areas were delineated according to geological and mineral resources features. Gold was selected as the dominant mineral, and the target deposit types are magmatic hydrothermal filling and skarn types. Anomaly verification and mineral exploration were carried out in Huanggutian, Guxi, Jinjiashan areas of Qimen County based on the results of the stream sediments survey. A batch of gold, tungsten, molybdenum orebodies were discovered, indicating that there exists great application value of prospecting in this area.
Zhang G B, Yang Y C, Liang B , et al. Geochemical characteristics of stream sediments and metallogenic prediction in the Wandashan area, eastern Heilongjiang Province[J]. Geology in China, 2017,44(3):588-603.
Yin G L, Liang K W, Yang F S , et al. A discussion on the geochemical characteristics of stream sediments and ore-prospecting orientation in Weixing-Anquan area of Heilongjiang Province[J]. Geophysical and Geochemical Exploration, 2017,41(3):402-409.
Zhu D W, He Y Y, Hao Y H , et al. Geochemical characteristics of stream sediments and prospecting orientation in the periphery of the Zankan iron ore deposit, Taxkorgan, Xinjiang[J]. Geological Bulletin of China, 2017,36(10):1867-1873.
Sun S L, Feng Z H, Huang X B , et al. Geochemical characteristics and ore-search prospects of Hanshuiquan area in Xinjiang based on stream sediment survey[J]. Geophysical and Geochemical Exploration, 2018,42(6):1116-1124.
Weng W F, Wang D E, Wang M . Geochemical characteristics of stream sediments and prospectivity of the Xiuning-Shexian area,Anhui Province[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2018,37(5):932-942.
葛肖虹, 马文璞 . 中国区域大地构造学教程[M]. 北京: 地质出版社, 2014.
Ge X H, Ma W P . Course of regional geotectonics in China[M]. Beijing: Geological Publishing House, 2014.
332 Geological Team of Bureau of Geology and Mineral Resources Exploration of Anhui Province. Report of regional geological survey of 1∶50000 Shanli sheet(H50E013014), Qimen county sheet(H50E013015), Yixian county sheet(H50E013016)[R]. 2014.
Qin Y, Wang D H, Wu L B , et al. Zircon SHRIMP U-Pb dating of the mineralized porphyry in the Dongyuan W deposit in Anhui Province and its geological significance[J]. Acta geological sinica, 2010,84(4):479-484.
Wang D E, Zhou X, Yu X Q , et al. SHRIMP zircon U-Pb dating and characteristics of Hf isotopes of the granodiorite porphyries in the Dongyuan W-Mo ore district, Qimen area, southern Anhui[J]. Geological Bulletin of China, 2011,30(10):1514-1529.
Yan J, Hou T J, Wang A G , et al. Petrogenetic contrastive studies on the Mesozonic early stage ore-bearing and late stage ore-barren granites from the southern Anhui Province[J]. Science China Early Sciences, 2017,47(11):1269-1291.
Weng W F, Zhi L G, Cai L Y , et al. Petrogenesis and geochemical comparison of two types of Yanshanian granite in south Anhui and its surrounding area[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2011,30(4):433-448.
Qian J P, He S F, Wang F M , et al. Geological and geochemical characteristics and tectono-geochemical prospecting work in Liaojia of Qimen, Anhui province[J]. Geophysical and Geochemical Exploration, 2008,32(5):519-524, 528.
Huang J Y, Lai S, Hu Y S , et al. Preliminary discussion on geological characteristics and ore-controlling factors of Liaojia Au-deposit, southern Anhui province[J]. Nonferrous Metals:Mining Section, 2018,70(3):34-38.
Zhao J, Sun Z K, Jia Y H , et al. Delineation of contrast value anomalies of 1∶50000 drainage sediment survey data: an example of the Qimantage area, Qinghai province[J]. Geology and Exploration, 2016,52(3):518-523.
Chen L, Wang H Y, Sun C Y . The application of anomaly contrast to extracting geochemical anomaly information: a study of Duobaoshan area in Heilongjiang province[J]. Geophysical and Geochemical Exploration, 2018,42(6):1150-1155.
Qian J M, LI H T, Xu Y X , et al. Study on the geochemical characteristics of black rock series from the Hetang formation in southeast margin of Yangtze platform[J]. J Mineral Petrol, 2010,30(2):95-102.
Shi C H, Cao J, Hu K , et al. A review of origins of mineral deposits hosted in black rock series and the mineralizing functions of their sea water, hydrothermal fluid and bio-organics[J]. Earth Science Frontiers, 2013,20(1):19-31.
Xu W L, Zheng R C, Yan X , et al. Trace and rare earth element geochemistry of the early Paleozoic black shales in the lower Yangtze area and its geological significances[J]. Journal of Jilin university: Earth Science Edition, 2014,44(4):1108-1122.