本文選題：西南三江　切入點：構(gòu)造單元　出處：《成都理工大學(xué)》2017年碩士論文

【摘要】：“三江”地區(qū)是特提斯成礦域指怒江、瀾滄江和金沙江三條江并流的橫斷山脈地區(qū),地跨滇西、川西、藏東及青海南部,包括青藏高原東部和云貴高原西部,成礦條件極其優(yōu)越,是我國重要的銅、鉛鋅、金、銀等多金屬成礦帶。論文在搜集和整理研究區(qū)資料的基礎(chǔ)上,利用GIS軟件對資料數(shù)據(jù)進行錄入篩選分析,應(yīng)用不同的分析方法,將不同構(gòu)造單元內(nèi)的構(gòu)造分別與礦床(點)進行相關(guān)分析,找出它們在空間分布上的空間分布關(guān)系,總結(jié)規(guī)律,從而圈定成礦遠景區(qū)的分布區(qū)域。論文取得的主要成果如下:(1)收集與整理研究區(qū)內(nèi)各斷裂構(gòu)造多源數(shù)據(jù)資料,按照構(gòu)造分級原則將研究區(qū)內(nèi)的構(gòu)造分為4個級別,并在野外做了部分的驗證工作。在此基礎(chǔ)上,分析了研究區(qū)單位網(wǎng)格中構(gòu)造的長度特征與空間分布規(guī)律。(2)對研究區(qū)內(nèi)各類礦床(點)進行多源數(shù)據(jù)資料收集與整理,對研究區(qū)內(nèi)的884個礦床(點)的信息進行歸類總結(jié),根據(jù)其規(guī)模的大小進行劃分,對每個構(gòu)造單元內(nèi)的礦點進行統(tǒng)計,分析每個構(gòu)造單元內(nèi)單位網(wǎng)格中礦床(點)的空間分布規(guī)律與礦床(點)數(shù)量特征。(3)通過相關(guān)性指數(shù)計算公式,計算出13構(gòu)造單元內(nèi)構(gòu)造與礦床(點)的相關(guān)性指數(shù),比較指數(shù)大小得出每個構(gòu)造單元內(nèi)最優(yōu)緩沖區(qū)。通過建立密度圖分析其相關(guān)性指數(shù)高低值分布特征。(4)在最優(yōu)緩沖區(qū)建立的基礎(chǔ)上,綜合應(yīng)用構(gòu)造與礦床(點)關(guān)系多種分析方法,對研究區(qū)異常區(qū)提取。主要有:不同構(gòu)造單元內(nèi)對構(gòu)造與不同規(guī)模的礦床(點)進行相關(guān)指數(shù)的計算、構(gòu)造復(fù)雜度的獲取、構(gòu)造交點密度、構(gòu)造等密度、構(gòu)造方位等的插值結(jié)果等等。并分析其在空間上的分布上的特征,總結(jié)其在研究區(qū)內(nèi)的分布規(guī)律,計算出每種分析方法的異常區(qū)域。根據(jù)每種方法對礦床(點)相關(guān)性指數(shù)的大小進行權(quán)重疊加,最后圈定了成礦的遠景區(qū)域�；谝陨系贸龅难芯砍晒�,可以很明確的得出斷裂與礦床(點)在空間上的相關(guān)性。在不同的構(gòu)造單元內(nèi),而不是整個三江區(qū)域,范圍的縮小使本文能夠更加細化的描述了三江地區(qū)內(nèi)的礦床(點)與構(gòu)造之間的關(guān)系,能夠更加準確的預(yù)測出研究區(qū)成礦區(qū)域,對西南三江區(qū)域的成礦規(guī)律也是一種補充,希望對西南三江找礦有一定的指導(dǎo)意義。
[Abstract]:The "Sanjiang" region is an area of Hengduan Mountains with three rivers, the Nujiang, Lancang and Jinsha rivers. It spans western Yunnan, western Sichuan, eastern Tibet and southern Qinghai, including the eastern part of the Qinghai-Tibet Plateau and the western part of the Yunnan-Guizhou Plateau.The metallogenic conditions are extremely superior and are important polymetallic metallogenic belts of copper, lead, zinc, gold and silver in China.On the basis of collecting and arranging the data of the study area, the paper uses GIS software to input and screen the data, and applies different analysis methods to analyze the correlation between the structures in different tectonic units and the deposits (points), respectively.To find out their spatial distribution relationship, sum up the law, so as to delineate the distribution of metallogenic scenic areas.The main achievements of this paper are as follows: (1) collecting and collating the multi-source data of each fault structure in the study area, according to the principle of structural classification, the structure in the study area is divided into four levels, and some verification work is done in the field.On this basis, the length characteristics and spatial distribution of the structure in the unit grid of the study area are analyzed. The data of various deposits (points) in the study area are collected and sorted out.The information of 884 deposits (points) in the study area is classified and summarized, and the ore points in each tectonic unit are classified according to their size.Based on the analysis of the spatial distribution of deposits (points) in each unit grid and the quantitative characteristics of deposits (points), the correlation index between the structures and the deposits (points) in the 13 tectonic units is calculated by the formula of correlation index.The optimal buffer in each construction unit is obtained by comparing the index size.On the basis of the establishment of optimal buffer zone, various analysis methods for the relationship between structure and deposit (point) are used to extract the anomalous area in the study area by establishing the density map to analyze the distribution characteristics of the correlation index of high value and low value.The main contents are as follows: the calculation of correlation exponents between structures and deposits (points) of different sizes in different tectonic units, the acquisition of structural complexity, the density of tectonic intersection points, the interpolation results of structural isodensity, structural azimuth, and so on.The characteristics of its spatial distribution are analyzed, and its distribution in the study area is summarized, and the abnormal regions of each analytical method are calculated.According to each method, the size of correlation index of ore deposit (point) is weighted superposition, and finally the metallogenic prospective area is delineated.Based on the above research results, the spatial correlation between faults and deposits can be clearly obtained.In different tectonic units, rather than the whole Sanjiang area, the reduction of the scope of this paper can more detailed description of the relationship between the deposits (points) and structures in the Sanjiang area, and can more accurately predict the metallogenic region in the study area.It is also a supplement to the metallogenic law in the Sanjiang area of southwest China, and it is hoped that it will be of guiding significance to the prospecting of the three rivers in the southwest.
【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】：P612

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