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Yu X.,Qingdao Technological University | Tang H.,Lunan Geo engineering Exploration Institute | Han Z.,Qingdao Technological University | Li C.,Lunan Geo engineering Exploration Institute
Acta Geologica Sinica

Rare earth deposits in the Chishan and Longbaoshan area have similar geological mineralization background, ore-controlling characteristics and deposit geological characteristics. Alkaline intrusive rock in early Yanshan period is closely related to rare earth elements deposits. Rare earth orebodies occur mainly in complex and country rocks. Study on rare earth elements and isotope results shows that orebearing alkaline concentrated magma likely belongs to crust-mantle magma source mixed type, and alkaline magma and ore-forming materials may be derived from the same parts of the mantle, and crust materials were mixed and assimilated in the magma intrusion. Chishan rare earth deposit is a single light REE enriched deposit, with REE-bearing quartz carbonate veins as major ore types. Ore-bearing minerals are dominated by bastnasite and parisite, and Ce-carbonate and Ca-strontianite were firstly discovered in China. Longbaoshan rare earth deposit is characterized by a paragenetic deposit between rare earth and gold ores. Quartz veins and silicified breccia veins are its major vein types; rare-earth bearing minerals are composed mainly of bastnaesite, Ce- and La-bearing bastnasite, and parisite. Gold minerals include native gold and silver gold. Ore-forming period was later than that of the formation of igneous rocks and belongs to late Mesozoic Yanshan period. The genesis of deposit is low or medium temperature alkaline magmatic hydrothermal rare earth deposit. Source

Lu Z.-S.,Shandong Institute and Laboratory of Geological science | Zhao Q.-L.,Lunan Geo engineering Exploration Institute | Li Q.-C.,Lunan Geo engineering Exploration Institute | Ge T.,Huangdao Entry Exit Inspection and Quarantine Bureau
Yejin Fenxi/Metallurgical Analysis

After digested by mixed acid (HClO4, HCl, HNO3 and HF) and extracted by tartaric acid (2 g/L) + aqua regia (φ=4%), eight components in tungsten ore including As, Cu, Ga, Mo, Pb, Sn, W and Zn were simultaneously determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). In this paper, three sample preparation methods were compared. The background interference was eliminated with off-peak background correction method, and the spectral overlapping interference of Zn with W was eliminated using interference element correction coefficients method. This method has been applied to the determination of tungsten ore national certified reference materials, and the results were in good agreement with the certified value with RSD less than 3.20%. Source

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