基于分形理論的江西宜豐水嶺礦區(qū)成礦預(yù)測
發(fā)布時(shí)間：2018-11-20 06:25
【摘要】：元素地球化學(xué)的分布規(guī)律十分復(fù)雜,不能單一的用線性關(guān)系去描述,如礦床與各種成礦控制因素之間普遍都呈非線性關(guān)系,傳統(tǒng)理論不能全面準(zhǔn)確地解決成礦預(yù)測學(xué)中涉及到的非線性問題。因此,為了提高成礦預(yù)測的準(zhǔn)確性,需要將非線性科學(xué)(包括孤立波、混沌和分形等)的理論和方法應(yīng)用于地球化學(xué)數(shù)據(jù)處理和礦區(qū)成礦預(yù)測。分形的本質(zhì)是描述事物間的冪律關(guān)系,不同的冪律關(guān)系有著特定的分維數(shù),根據(jù)分維數(shù)的特征來描述事物的本質(zhì)。區(qū)域地層中元素含量在時(shí)間和空間上都呈函數(shù)關(guān)系,元素的地球化學(xué)背景值和異常值的形成都有各自的特征,這說明異常的形成有各自的冪律關(guān)系,即分維數(shù)具有獨(dú)立性。因此,用分形方法來描述地球化學(xué)異常形成的本質(zhì)是科學(xué)的。傳統(tǒng)方法處理化探數(shù)據(jù)的前提是需要剔除不符合正態(tài)分布的極值點(diǎn),但是元素的分布是多種因素下形成的,各個(gè)元素的分布有著自己特有的規(guī)律,剔除后的樣點(diǎn)數(shù)據(jù)不能真實(shí)反應(yīng)元素本身的分布規(guī)律,而含量-面積分形法不需剔除樣點(diǎn)數(shù)據(jù),則不會打破元素本身的分布規(guī)律。所以,含量-面積分形法可以彌補(bǔ)傳統(tǒng)統(tǒng)計(jì)方法在化探數(shù)據(jù)處理中剔除不符合正態(tài)分布極值點(diǎn)的缺陷與不足。本次論文將分形理論運(yùn)用于江西宜豐水嶺礦區(qū)化探數(shù)據(jù)處理,為礦區(qū)找礦勘查提供準(zhǔn)確的找礦靶區(qū)。通過對地球化學(xué)數(shù)據(jù)做了多元統(tǒng)計(jì)分析,探討了W元素與其它元素之間的關(guān)系,在此基礎(chǔ)上分別用傳統(tǒng)方法和分形方法對地球化學(xué)數(shù)據(jù)進(jìn)行處理,對求取的異常下限進(jìn)行對比分析,選擇合理的異常下限,運(yùn)用MAPGIS和Surfer專業(yè)制圖軟件繪制地球化學(xué)異常圖和組合異常圖,并結(jié)合礦區(qū)地質(zhì)特征圈定了找礦靶區(qū)。經(jīng)過以上研究,得出以下結(jié)論:(1)通過對所測地球化學(xué)數(shù)據(jù)做多元統(tǒng)計(jì)分析可知,相關(guān)性分析表明只有Au元素與W元素呈正相關(guān),說明Au元素與W元素有一定的相關(guān)性,Au元素的富集在一定程度上指示W(wǎng)元素的富集。聚類分析顯示,當(dāng)距離系數(shù)d=5時(shí),只有Au、Nb,Cu形成組合,其它元素不顯示相關(guān)性。目標(biāo)元素W表現(xiàn)出獨(dú)立性,單獨(dú)一類。通過因子分析,明確了W和Au有著密切的關(guān)系,和相關(guān)性分析結(jié)果一致。(2)通過傳統(tǒng)方法和分形方法對地球化學(xué)數(shù)據(jù)進(jìn)行處理,結(jié)果表明研究區(qū)含量普遍偏高的元素用分形方法得出的異常下限比用傳統(tǒng)統(tǒng)計(jì)方法得出的異常下限更高,研究區(qū)含量普遍偏低的元素用分形方法得出的異常下限比用傳統(tǒng)統(tǒng)計(jì)方法得出的異常下限更低,原因是含量-面積分形法不用剔除數(shù)據(jù)中不服從正態(tài)分布的特高值和特低值,對高異常區(qū)能夠進(jìn)一步的圈定異常范圍,對弱分異區(qū)域可以靈敏識別弱小異常,彌補(bǔ)了傳統(tǒng)方法的缺陷與不足。(3)通過對比單元素異常圖,發(fā)現(xiàn)北西向斷裂呈現(xiàn)出Au、W、Pb和Zn異常的良好套合關(guān)系,這四種元素異常在該斷裂附近均有良好的濃度分帶現(xiàn)象,并且已有勘查成果也發(fā)現(xiàn)了該斷裂局部出現(xiàn)鎢礦化,表明以該斷裂為找礦標(biāo)志找鎢礦潛力較大、前景較好。(4)通過制作組合異常圖,根據(jù)各元素組合套合情況和已有勘查成果,初步圈定了兩個(gè)重點(diǎn)靶區(qū):一是礦區(qū)北西向斷裂西北角即AP1區(qū),該處Au、Cu、Pb、Zn、W、Mo六種元素濃集中心的重疊性較好,異常規(guī)模較大,因此該斷裂周邊是找鎢礦的重點(diǎn)靶區(qū);二是礦區(qū)東南角即AP2區(qū),在該處W異常大面積產(chǎn)出,異常出現(xiàn)三級濃度分帶,并且根據(jù)W元素異常形態(tài)及W的產(chǎn)出條件可初步推測該區(qū)域深部存在一北西向斷裂,預(yù)示找鎢礦前景良好,下一步建議對本文所圈定的異常區(qū)域進(jìn)行工程驗(yàn)證,助力于下一步找礦突破。
[Abstract]:The distribution law of element geochemistry is very complicated and can not be described by a single linear relation, such as the non-linear relation between the deposit and various ore-forming control factors, and the traditional theory can not comprehensively and accurately solve the non-linear problems involved in the metallogenetic engineering. Therefore, in order to improve the accuracy of ore-forming prediction, it is necessary to apply the theory and method of non-linear science (including isolated wave, mixed wave, fractal, etc.) to the geochemical data processing and the ore-forming prediction of the mining area. The essence of fractal is to describe the power-law relation between things, and the relation of different power-law has a specific fractal dimension, and the essence of things is described according to the characteristics of the fractal dimension. The element content in the regional strata is a function relation in time and space, and the geochemical background value and the abnormal value of the element have their respective characteristics. This indicates that the formation of the anomaly has the power-law relation, that is, the fractal dimension is independent. Therefore, a fractal method is used to describe the nature of geochemical anomaly formation. the premise of the traditional method to process the geochemical data is to eliminate the extreme points which do not meet the normal distribution, but the distribution of the elements is formed under a plurality of factors, the distribution of each element has a specific rule, and the sampled sample point data can not be the distribution rule of the real reaction element itself, and the content-area fractal method does not need to remove the sample point data, and the distribution rule of the element itself is not broken. Therefore, the content-area fractal method can make up for the defect and deficiency that the traditional statistical method can eliminate the extreme points that do not meet the normal distribution in the data processing of geochemical exploration. This paper applies the fractal theory to the data processing of geochemical exploration in Yifeng, Yifeng, Jiangxi, and provides an accurate prospecting target for prospecting and exploration in the mining area. Based on the multivariate statistical analysis of the geochemical data, the relationship between the W element and other elements is discussed, the geochemical data is treated by the traditional method and the fractal method, the lower limit of the anomaly is compared and analyzed, and the reasonable lower limit is selected. Using the MAPGIS and Surfer professional mapping software, the geochemical anomaly map and the combined anomaly map are drawn, and the prospecting target area is delineated by combining the geological characteristics of the mining area. Through the above research, the following conclusions are drawn: (1) The correlation analysis shows that only the Au element is positively related to the W element, indicating that the Au element has a certain correlation with the W element, The enrichment of the Au element indicates the enrichment of the W element to a certain extent. The cluster analysis shows that when the distance coefficient d = 5, only Au, Nb, and Cu form a combination, and the other elements do not show the correlation. the target element w exhibits independence, a single class. The relationship between W and Au is determined by factor analysis, and the results of correlation analysis are consistent. (2) The geochemical data is treated by the traditional method and the fractal method, and the result shows that the lower limit of the anomaly obtained by the fractal method is higher than that of the abnormal lower limit obtained by the traditional statistical method. The lower limit of the anomaly obtained by the fractal method is lower than the lower limit of the anomaly obtained by the traditional statistical method, because the content-area fractal method does not follow the special high and low values of the normal distribution in the data, The invention can further delineate the abnormal range for the high-anomaly area, and can be used for sensitively identifying the weak point and the abnormal area, and the defect and the defect of the traditional method are made up. (3) Through the comparison of the anomaly map of the single element, it is found that the fault of the north west shows a good fitting relation of Au, W, Pb and Zn, the four elements are abnormal in the vicinity of the fracture, and there is a good concentration distribution phenomenon. It is indicated that the potential of the tungsten ore is large and the prospect is good. (4) By making the combined anomaly map, two key target areas are preliminarily delineated based on the combination condition of each element and the existing survey results: one is the north west of the mining area to the northwest corner of the fracture, that is, the AP1 area, where the overlap of the concentrated centers of the six elements of Au, Cu, Pb, Zn, W and Mo is good, the abnormal scale is large, so the fracture periphery is the key target area for finding the tungsten ore; 2 is the south-east corner of the mining area, namely the AP2 area, where W is abnormally large-area output, and the three-level concentration sub-belt is abnormal; and according to the abnormal form of W element and the output condition of W, it can be preliminarily estimated that there is a north-west fault in the deep part of the region, which indicates that the future of the tungsten ore is good, and the next step is to carry out the engineering verification on the abnormal region delineated in this paper to assist in the next prospecting breakthrough.
【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
本文編號：2344053
[Abstract]:The distribution law of element geochemistry is very complicated and can not be described by a single linear relation, such as the non-linear relation between the deposit and various ore-forming control factors, and the traditional theory can not comprehensively and accurately solve the non-linear problems involved in the metallogenetic engineering. Therefore, in order to improve the accuracy of ore-forming prediction, it is necessary to apply the theory and method of non-linear science (including isolated wave, mixed wave, fractal, etc.) to the geochemical data processing and the ore-forming prediction of the mining area. The essence of fractal is to describe the power-law relation between things, and the relation of different power-law has a specific fractal dimension, and the essence of things is described according to the characteristics of the fractal dimension. The element content in the regional strata is a function relation in time and space, and the geochemical background value and the abnormal value of the element have their respective characteristics. This indicates that the formation of the anomaly has the power-law relation, that is, the fractal dimension is independent. Therefore, a fractal method is used to describe the nature of geochemical anomaly formation. the premise of the traditional method to process the geochemical data is to eliminate the extreme points which do not meet the normal distribution, but the distribution of the elements is formed under a plurality of factors, the distribution of each element has a specific rule, and the sampled sample point data can not be the distribution rule of the real reaction element itself, and the content-area fractal method does not need to remove the sample point data, and the distribution rule of the element itself is not broken. Therefore, the content-area fractal method can make up for the defect and deficiency that the traditional statistical method can eliminate the extreme points that do not meet the normal distribution in the data processing of geochemical exploration. This paper applies the fractal theory to the data processing of geochemical exploration in Yifeng, Yifeng, Jiangxi, and provides an accurate prospecting target for prospecting and exploration in the mining area. Based on the multivariate statistical analysis of the geochemical data, the relationship between the W element and other elements is discussed, the geochemical data is treated by the traditional method and the fractal method, the lower limit of the anomaly is compared and analyzed, and the reasonable lower limit is selected. Using the MAPGIS and Surfer professional mapping software, the geochemical anomaly map and the combined anomaly map are drawn, and the prospecting target area is delineated by combining the geological characteristics of the mining area. Through the above research, the following conclusions are drawn: (1) The correlation analysis shows that only the Au element is positively related to the W element, indicating that the Au element has a certain correlation with the W element, The enrichment of the Au element indicates the enrichment of the W element to a certain extent. The cluster analysis shows that when the distance coefficient d = 5, only Au, Nb, and Cu form a combination, and the other elements do not show the correlation. the target element w exhibits independence, a single class. The relationship between W and Au is determined by factor analysis, and the results of correlation analysis are consistent. (2) The geochemical data is treated by the traditional method and the fractal method, and the result shows that the lower limit of the anomaly obtained by the fractal method is higher than that of the abnormal lower limit obtained by the traditional statistical method. The lower limit of the anomaly obtained by the fractal method is lower than the lower limit of the anomaly obtained by the traditional statistical method, because the content-area fractal method does not follow the special high and low values of the normal distribution in the data, The invention can further delineate the abnormal range for the high-anomaly area, and can be used for sensitively identifying the weak point and the abnormal area, and the defect and the defect of the traditional method are made up. (3) Through the comparison of the anomaly map of the single element, it is found that the fault of the north west shows a good fitting relation of Au, W, Pb and Zn, the four elements are abnormal in the vicinity of the fracture, and there is a good concentration distribution phenomenon. It is indicated that the potential of the tungsten ore is large and the prospect is good. (4) By making the combined anomaly map, two key target areas are preliminarily delineated based on the combination condition of each element and the existing survey results: one is the north west of the mining area to the northwest corner of the fracture, that is, the AP1 area, where the overlap of the concentrated centers of the six elements of Au, Cu, Pb, Zn, W and Mo is good, the abnormal scale is large, so the fracture periphery is the key target area for finding the tungsten ore; 2 is the south-east corner of the mining area, namely the AP2 area, where W is abnormally large-area output, and the three-level concentration sub-belt is abnormal; and according to the abnormal form of W element and the output condition of W, it can be preliminarily estimated that there is a north-west fault in the deep part of the region, which indicates that the future of the tungsten ore is good, and the next step is to carry out the engineering verification on the abnormal region delineated in this paper to assist in the next prospecting breakthrough.
【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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