西藏安多縣巴布茸西鉛鋅礦土壤地球化學(xué)特征及成礦預(yù)測
發(fā)布時(shí)間：2018-08-16 07:39
【摘要】：西藏安多縣巴布茸西鉛鋅礦多金屬調(diào)查評價(jià)區(qū)位于沱沱河整裝勘查區(qū)的多才瑪—布瑪浪納鉛鋅銅鉬成礦帶內(nèi),該成礦帶現(xiàn)已發(fā)現(xiàn)多個礦床點(diǎn)。巴布茸西地質(zhì)背景與成礦帶內(nèi)已發(fā)現(xiàn)的礦床點(diǎn)具有類似的地質(zhì)背景,因此有著非常好的找礦潛力。本論文在地質(zhì)調(diào)查、物探和化探的基礎(chǔ)上,參照區(qū)域地質(zhì)特征,結(jié)合研究區(qū)內(nèi)的地質(zhì)背景以及自然地理?xiàng)l件,并廣泛閱讀了相關(guān)文獻(xiàn),取得了以下主要成果和結(jié)論:對土壤化探數(shù)據(jù)進(jìn)行初步處理,得到以下認(rèn)識:As、Sb、Pb、Cd等4種元素的豐度系數(shù)大于2,說明這4種元素在研究區(qū)內(nèi)富集程度較高,有著比較好的成礦前景;Ag、Pb等2種元素的變異系數(shù)大于1,說明這2種元素在研究區(qū)內(nèi)分布越不均勻,離散程度很高,越有可能局部富集,并形成礦床;偏度系數(shù)及峰度系數(shù)顯示研究區(qū)內(nèi)的9個元素不符合正態(tài)分布,說明它們的異常成因類型受到多個地質(zhì)事件的影響。利用多元統(tǒng)計(jì)學(xué)方法,如相關(guān)分析、聚類分析和因子分析,對原始數(shù)據(jù)進(jìn)行了分析處理,結(jié)果表明:Pb—Sb—As—Zn—Cd作為一個主因子元素組合,在研究區(qū)中套合較好,具有共生或伴生關(guān)系,成礦前景良好;球形檢驗(yàn)統(tǒng)計(jì)量的結(jié)果,以及旋轉(zhuǎn)因子載荷圖都印證了以上多元統(tǒng)計(jì)分析結(jié)果的一致性和可靠性。根據(jù)本次土壤地球化學(xué)測量結(jié)果,采用迭代法確定本區(qū)背景值和異常下限,并編制地球化學(xué)異常圖,繪制出西藏安多縣巴布茸西調(diào)查評價(jià)區(qū)單元素異常圖9幅,圈定單元素異常共15個,其中3個Pb異常和7個Ag異常;Pb元素和Ag元素具有明顯的濃集中心,異常值很高,指示成礦。根據(jù)單元素異常分析和評價(jià)結(jié)果,繪制化探綜合異常圖,圈出多元素組合異常9個,其中乙類異常3個,丙類異常6個。另外,對研究區(qū)的物探激電中梯結(jié)果做出分析,主要根據(jù)視極化率異常圈定異常帶3個,編號分別為JD1、JD2及JD3激電異常,推測均為斷層作用下以Ag、Pb為主的硫化物進(jìn)一步富集引起。研究區(qū)沒有巖漿巖出露,也未發(fā)現(xiàn)斷層和褶皺構(gòu)造,圍巖蝕變礦化較弱,褐鐵礦化縱貫研究區(qū),而且兩側(cè)分布多個化探異常區(qū),推測褐鐵礦化是該區(qū)的找礦標(biāo)志。綜合分析該研究區(qū)的地質(zhì)資料,并結(jié)合本次土壤地球化學(xué)異常調(diào)查和激電中梯的成果,再參考褐鐵礦化帶的位置,筆者在研究區(qū)中部偏南位置圈定了一個Ag、Pb為主元素的成礦預(yù)測區(qū),并初步分析引起物化探異常的成因,為進(jìn)一步的找礦工作做參考,具有一定的理論意義和實(shí)用的找礦價(jià)值。
[Abstract]:The polymetallic investigation and evaluation area of Babuyongxi Pb-Zn ore deposit in Ando County, Tibet is located in the Docai Ma Brana Pb-Zn Cu Mo metallogenic belt in the Tuotuo River integrated exploration area. Many ore deposit sites have been found in this metallogenic zone. The west geological setting of Babu Anong has a similar geological background to the deposit sites found in the metallogenic belt, so it has very good prospecting potential. On the basis of geological survey, geophysical exploration and geochemical exploration, this paper, referring to the regional geological characteristics, combined with the geological background and natural geographical conditions in the study area, has read the relevant literature extensively. The main results and conclusions are as follows: the preliminary processing of the geochemical data of soil shows that the abundance coefficient of the four elements, such as SbPbN, CD and so on, is greater than 2, which indicates that the enrichment degree of these four elements is high in the study area. The coefficient of variation of the two elements is greater than 1, which indicates that the more uneven the distribution of the two elements in the study area, the higher the degree of dispersion, the more likely they are to be locally enriched and to form a deposit. The skewness coefficient and kurtosis coefficient show that the nine elements in the study area do not conform to the normal distribution, indicating that their anomalous genetic types are affected by many geological events. By using multivariate statistical methods, such as correlation analysis, cluster analysis and factor analysis, the original data are analyzed and processed. The results show that as a combination of major factor elements, the component of the component is better integrated in the study area. The results show that: Pb-Sb-As-Zn-CD is a good combination of elements in the study area. The result of spherical test statistics and the load diagram of rotation factor all confirm the consistency and reliability of the results of multivariate statistical analysis. According to the results of the soil geochemistry survey, the background value and the lower limit of the anomaly were determined by iterative method, and the geochemical anomaly map was compiled, and 9 single element anomalies were drawn up in the west investigation and evaluation area of Bafu antler in Ando County, Tibet. There are 15 anomalous elements in circle order, among which 3 Pb anomalies and 7 Ag anomalies have obvious concentration centers, and the outliers are very high, indicating mineralization. According to the results of single element anomaly analysis and evaluation, the synthetic anomaly map of geochemical exploration is drawn, and 9 multielement combination anomalies are obtained, of which 3 are category B anomalies and 6 are class C anomalies. In addition, the results of geophysical IP ladder in the study area are analyzed, mainly according to the apparent polarizability anomaly delineating three anomalous zones, numbered as JD1, JD2 and JD3, respectively, which may be caused by further enrichment of sulfides dominated by Ag-Pb under the action of faults. There is no magmatic outcrop, no fault and fold structure, weak alteration and mineralization of surrounding rock, longitudinal study area of limonite mineralization, and many geochemical anomaly areas on both sides of the study area. It is inferred that limonite mineralization is the prospecting mark of this area. Based on the comprehensive analysis of the geological data of the study area, combined with the results of the investigation of the geochemical anomalies of the soil and the results of the induced electric ladder, and referring to the location of the limonite mineralization zone, The authors have delineated a metallogenic prediction area of the main elements of AgPb in the central and southern part of the study area, and preliminarily analyzed the genesis of geophysical and geochemical anomalies, which is of certain theoretical significance and practical prospecting value for the further prospecting work.
【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】：P618.4
本文編號：2185316
[Abstract]:The polymetallic investigation and evaluation area of Babuyongxi Pb-Zn ore deposit in Ando County, Tibet is located in the Docai Ma Brana Pb-Zn Cu Mo metallogenic belt in the Tuotuo River integrated exploration area. Many ore deposit sites have been found in this metallogenic zone. The west geological setting of Babu Anong has a similar geological background to the deposit sites found in the metallogenic belt, so it has very good prospecting potential. On the basis of geological survey, geophysical exploration and geochemical exploration, this paper, referring to the regional geological characteristics, combined with the geological background and natural geographical conditions in the study area, has read the relevant literature extensively. The main results and conclusions are as follows: the preliminary processing of the geochemical data of soil shows that the abundance coefficient of the four elements, such as SbPbN, CD and so on, is greater than 2, which indicates that the enrichment degree of these four elements is high in the study area. The coefficient of variation of the two elements is greater than 1, which indicates that the more uneven the distribution of the two elements in the study area, the higher the degree of dispersion, the more likely they are to be locally enriched and to form a deposit. The skewness coefficient and kurtosis coefficient show that the nine elements in the study area do not conform to the normal distribution, indicating that their anomalous genetic types are affected by many geological events. By using multivariate statistical methods, such as correlation analysis, cluster analysis and factor analysis, the original data are analyzed and processed. The results show that as a combination of major factor elements, the component of the component is better integrated in the study area. The results show that: Pb-Sb-As-Zn-CD is a good combination of elements in the study area. The result of spherical test statistics and the load diagram of rotation factor all confirm the consistency and reliability of the results of multivariate statistical analysis. According to the results of the soil geochemistry survey, the background value and the lower limit of the anomaly were determined by iterative method, and the geochemical anomaly map was compiled, and 9 single element anomalies were drawn up in the west investigation and evaluation area of Bafu antler in Ando County, Tibet. There are 15 anomalous elements in circle order, among which 3 Pb anomalies and 7 Ag anomalies have obvious concentration centers, and the outliers are very high, indicating mineralization. According to the results of single element anomaly analysis and evaluation, the synthetic anomaly map of geochemical exploration is drawn, and 9 multielement combination anomalies are obtained, of which 3 are category B anomalies and 6 are class C anomalies. In addition, the results of geophysical IP ladder in the study area are analyzed, mainly according to the apparent polarizability anomaly delineating three anomalous zones, numbered as JD1, JD2 and JD3, respectively, which may be caused by further enrichment of sulfides dominated by Ag-Pb under the action of faults. There is no magmatic outcrop, no fault and fold structure, weak alteration and mineralization of surrounding rock, longitudinal study area of limonite mineralization, and many geochemical anomaly areas on both sides of the study area. It is inferred that limonite mineralization is the prospecting mark of this area. Based on the comprehensive analysis of the geological data of the study area, combined with the results of the investigation of the geochemical anomalies of the soil and the results of the induced electric ladder, and referring to the location of the limonite mineralization zone, The authors have delineated a metallogenic prediction area of the main elements of AgPb in the central and southern part of the study area, and preliminarily analyzed the genesis of geophysical and geochemical anomalies, which is of certain theoretical significance and practical prospecting value for the further prospecting work.
【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】：P618.4
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