The Research Of Ximaidai Ore-body Digitization And Metallogenic Prognosis In Dachang, GuangXi

With the help of computer, the theories of geostatic, geomathematics and many other new fringe subjects are used to study the digitization of Ximaidai ore-body in this paper . On the basis of it , many geological data have been investigated for metallogem'c prognosis. The main research work and results are listed as follows:(1) The original three-dimensional coordinate database has been established, include 252 Prospecting engineering -. 9065 samples, 8883 lines, near 53298 samples' Sn, Pb and Zn value. And it is concluded that the grade of the deposit is uneven.(2) Through the general-statistical-analysis on the value of 9065 samples which include single samples and combined samples, it is concluded that Sn, Pb, Zn value is normal distributed and their variation factors are as follows: 221.92%, 141.86%, 114.25% o(3) The lithology model of Ximaidai ore-body is established, and the variation function curves is calculated and fitted, and at last a mathematic and economic model is established.(4) By means of Kriging, Ximaidai ore-body is estimated by the unit of 3m X 1m X 2m cube meters in volume, the ore figure is confirmed, and the grade model is built up .(5) Ore reserves and mean value of different grades have been calculated by levels and by rows, and they are calculated differently for three elements: Sn, Pb and Zn.(6) A lot of horizontal geological maps between 570 level and 455 level, and cross section maps from No.4 to No.22-1 exploration lines, have been plotted by computer.(7) A integrated chart of tin isoline projection of Ximaidai ore-body has been drafted. And initial metallogenic prognosis has been made that there are four areas near Ximaidai ore-body having ores, they are it's northeast extend area, the north area of Ximaidai and No.92 ore-body, the lower area among D22 stratum.(8) A computer station has been established for application and spreading the research result of Ximaidai ore-body at Tongkeng Tin Mine; and the staffers of the mine have been trained, the research result was applied and spread.