Distributional Feature And Prospect Forecast Of W-Sn Deposits Of The Nanling Area

The structures, magmatite and W—Sn deposits of the region of interest (N 24°—26°,E 110°—115°) were studied and a new light was obtained subsequently.1. The study showed that the faulted structures of NE and NNE direction are primary.2. The distributional features of γ52a, γ52b, γ52c and γ53a were studied. This article alsostudied the distributional feature of the W—Sn deposits of Nanling area and the positionalconnection of the granite and W—Sn deposits. The granites of early Yanshan period areprimary which is too closely identified with W—Sn deposits;the Nanling region tungsten,tin deposits spatial distribution of apparent, In the study area of the east longitude113.5°—115°, tungsten deposits are primary;In the study area of the east longitude 111°-113.5°, tin deposits are primary;The associated W—Sn deposits are widely distributed inthe region of interest,there were no obvious rules for their distribution.3. Author contrasted the Huanan crust with the global crust from differentiation degreeof crust and demonstrated the differentiation degree of the Huanan crust is above the globalcurst by elements which are inclined to concentrate in the crust and elements which areinclined to concentrate in the earth mantle, the material basis of the Huanan metallogeneticprovince bring about by this.4. The distributional characteristics of W and Sn element were analyzed and later thedistributing graph of the two elements were made by using some geochemical data1:200000 of northern latitude 24.8°—26°,east longitude 110°—115°, author Calculated theanomaly threshold of W and Sn element, the result showed that the distributionalcharacteristics of W and Sn elements were normal anomaly round γ52a, γ52b and γ52c over alarge area in the region of interest.5. A forecast of finding W—Sn deposit was made for the future. 3 first levelexploration target and 4 second level exploration target were divided for finding tindeposits, 5 first level exploration target and 4 second level exploration target were dividedfor finding tungsten deposits.