【摘要】：隨著地質(zhì)找礦的不斷深入,地表礦床基本被查明,找礦難度加大。長期的實踐表明,地球化學(xué)探礦作為一種效率高、找礦效果顯著的方法,成為尋找隱伏礦以及難辨別礦的主要手段。本次研究工作選取位于三江成礦帶南段的昌寧-孟連Pb、Zn、Ag等多金屬成礦帶的勐統(tǒng)地區(qū)進行地球化學(xué)測量,在此基礎(chǔ)上結(jié)合區(qū)域成礦背景進行找礦靶區(qū)的篩選,找出成礦有利地段,為后續(xù)找礦工作提供方向。前期先對勐統(tǒng)地區(qū)展開1:5萬水系沉積物測量工作,總結(jié)對比選取出適合該地區(qū)的地球化學(xué)異常提取方法,采用網(wǎng)格法對水系沉積物測量獲得離散數(shù)據(jù)處理,取得較好的插值�；谇叭艘呀�(jīng)在該地區(qū)驗證并得出了統(tǒng)一的地球化學(xué)背景結(jié)論及認識,所以本次研究通過頻率分布直方圖得出21種元素基本具有單峰的特征,進而利用了剔除迭代法確定了異常下限。進一步依據(jù)研究區(qū)地質(zhì)成礦背景及景觀背景劃分出三個地質(zhì)小區(qū),所以單方面的異常下限已經(jīng)不足以代表整個研究區(qū),因此又統(tǒng)算了不同子區(qū)中的異常下限。又利用元素共生組合分析規(guī)律,通過相關(guān)性分析、因子分析、R型聚類三種方法確定了五組元素共生組合,最后利用DGSinfo軟件對異常面積最大的元素區(qū)進行著色處理,勾繪并圈定出多元素綜合異常區(qū)。后期對圈定出的七個異常區(qū)進行1:1萬土壤剖面測量,在每個異常區(qū)中根據(jù)異常區(qū)的面積和展布布置合適的土壤采樣以及X熒光現(xiàn)場分析樣,對七個異常區(qū)予以驗證,著重劃分出兩個找礦靶區(qū)。
[Abstract]:With the continuous deepening of geological prospecting, surface deposits are basically identified, and it is more difficult to find ore deposits. Long-term practice shows that geochemical prospecting, as a method with high efficiency and remarkable prospecting effect, has become the main means of searching for concealed ore and difficult to distinguish ore. In this study, the Mengseries area of Changning-Menglian Pb, Zn,Ag polymetallic metallogenic belt located in the southern part of Sanjiang metallogenic belt was selected for geochemical survey. On this basis, the ore-prospecting target area was screened in combination with the regional metallogenic background. Find out the ore-forming favorable area, provide the direction for the follow-up ore prospecting work. In the early stage, 1: 50 000 river sediment survey was carried out in Mengtong area, and the geochemical anomaly extraction method suitable for Mengtong area was summarized and selected, and the discrete data processing was obtained by using grid method to measure stream sediment. Better interpolation is obtained. Based on the conclusion and understanding of geochemical background which has been verified by predecessors in this area, this study shows that 21 elements have the characteristic of single peak through the histogram of frequency distribution. Furthermore, the lower limit of the anomaly is determined by the elimination iteration method. According to the geological metallogenic background and landscape background of the study area, three geological zones are further divided, so the single anomaly lower limit is not enough to represent the whole study area, so the anomaly lower limit in different sub-regions is calculated. By using the rule of element symbiosis combination analysis, five groups of elements symbiosis combination were determined by correlation analysis, factor analysis and R-type clustering. Finally, the element region with the largest anomaly area was colored with DGSinfo software. Delineate and delineate the multi-element synthetic anomaly area. In the later stage, 1: 10,000 soil profile measurements were carried out in the seven abnormal areas, and the seven abnormal areas were verified by appropriate soil sampling and X-ray fluorescence field analysis samples according to the area and distribution of the abnormal areas in each abnormal area. Two prospecting targets are emphatically divided.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P632

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