地氣場(chǎng)信息源解析及其在隱伏金屬礦勘查中的應(yīng)用研究
發(fā)布時(shí)間：2019-01-10 13:37
【摘要】：地氣測(cè)量是上世紀(jì)80年代誕生的一種新的找礦技術(shù)方法,其對(duì)于探測(cè)隱伏金屬礦床而言具有平面投影定位較準(zhǔn)確、探測(cè)靈敏度高的特點(diǎn),是目前探測(cè)隱伏礦床的重要手段之一。本文以地氣遷移模型實(shí)驗(yàn)為基礎(chǔ),對(duì)地氣遷移規(guī)律及地氣場(chǎng)源區(qū)進(jìn)行了初步探討,以桂北大廠隱伏鋅銅礦為例進(jìn)行了金屬礦床地氣場(chǎng)源區(qū)解析,并利用地氣探測(cè)手段對(duì)滇西東山鉛鋅礦床以及拉拉銅礦外圍紅泥坡-板山頭地區(qū)進(jìn)行了探測(cè)應(yīng)用與找礦預(yù)測(cè)。地氣遷移實(shí)驗(yàn)結(jié)果表明,無(wú)論是單礦層模型還是礦體+圍巖模型,在有熱量驅(qū)動(dòng)的上升氣流作用下,主成礦元素及其他微量元素均有不同程度的遷出,表明由于深部隱伏礦體存在而引起的上升地氣流中主成礦元素地氣異常是客觀存在的。由于各元素相對(duì)于地氣流的活性不同,造成了不同的元素具有不同的遷出率與遷出比。圍巖對(duì)于地氣場(chǎng)具有較明顯的影響,一方面圍巖對(duì)于上升的氣流具有捕集作用,從而減弱上升氣流中主成礦元素的含量,但隨著積累時(shí)間的增加會(huì)導(dǎo)致圍巖中元素含量的增加,進(jìn)而會(huì)增加上升地氣流中元素含量,從而加大異常;另一方面,圍巖中本身主成礦元素的含量對(duì)經(jīng)過(guò)圍巖后的地氣流產(chǎn)生影響,表現(xiàn)為圍巖中本身金屬元素被萃取到經(jīng)過(guò)的地氣流中,從而增大近地表或地表獲得的異常強(qiáng)度。但綜合而言,能夠真正形成高強(qiáng)度的地氣異常主要還是隱伏礦體所致。以桂北大廠隱伏鋅銅礦床為例進(jìn)行了地氣場(chǎng)源區(qū)示蹤研究,利用地質(zhì)統(tǒng)計(jì)學(xué)中元素聚類分析與因子分析進(jìn)行源區(qū)解析,結(jié)果表明,由于確定的異常下限來(lái)源于各地質(zhì)體貢獻(xiàn)組分歸一化后的系統(tǒng)數(shù)據(jù),因此在這個(gè)系統(tǒng)背景下形成的強(qiáng)烈異常主要為礦致異常,且其具有異常強(qiáng)度相對(duì)較大而異常范圍相對(duì)較小的特點(diǎn)。利用地氣探測(cè)手段對(duì)東山鉛鋅礦床及拉拉銅礦外圍紅泥坡-板山頭地區(qū)進(jìn)行了找礦應(yīng)用與找礦預(yù)測(cè),結(jié)果表明地氣測(cè)量對(duì)于探測(cè)半隱伏-隱伏金屬礦床是切實(shí)有效的,其在礦體上方均形成了非常明顯的主成礦元素異常,探測(cè)靈敏度很高,有效探測(cè)礦體埋藏深度可達(dá)500m以上(東山礦床)。與此同時(shí),對(duì)東山礦區(qū)F18、F3斷層展布區(qū)域進(jìn)行了找礦預(yù)測(cè),指明了找礦方向;對(duì)拉拉銅礦外圍紅泥坡-板山頭地區(qū)進(jìn)行了找礦預(yù)測(cè)工作,在鈉質(zhì)火山巖展布區(qū)域獲得了明顯的地氣與土壤Cu、Zn、Pb異常,并圈定了重點(diǎn)異常區(qū)作為找礦靶區(qū)。
[Abstract]:Geophysical survey is a new prospecting technique born in 1980s. It has the characteristics of accurate plane projection location and high detection sensitivity. It is one of the most important methods to detect concealed ore deposits at present. Based on the model experiment of earth gas migration, this paper preliminarily discusses the law of earth gas migration and the source region of earth gas field. Taking Dachang concealed zinc and copper deposit in northern Guangxi as an example, the source region of earth gas field of metal deposit is analyzed. The application and prospecting prediction of Dongshan Pb-Zn deposit in western Yunnan and the Hongnipo-Banshantou area around Lala Copper Mine are carried out. The experimental results show that the main ore-forming elements and other trace elements migrate out in varying degrees under the action of heat driven updraft, regardless of the single ore-bed model or the ore-body surrounding rock model. It is shown that the anomalies of the main ore-forming elements in the upwelling air flow caused by the existence of deep concealed orebodies are objective. Different elements have different migration rate and migration ratio due to the different activity of each element relative to the ground airflow. The surrounding rock has obvious influence on the gas field. On the one hand, the surrounding rock has a trapping effect on the upward air flow, thus weakening the content of the main ore-forming elements in the updraft, but with the increase of accumulation time, the content of the elements in the surrounding rock will increase. Furthermore, it will increase the element content in the upwelling air flow, thus increasing the anomaly. On the other hand, the content of the main ore-forming elements in the surrounding rock has an effect on the ground air flow after passing through the surrounding rock, which shows that the metal elements in the surrounding rock are extracted into the passing ground flow, thus increasing the anomalous strength obtained near the surface or the surface of the earth. But generally speaking, it is mainly caused by concealed orebodies that can really form high-intensity anomaly of earth gas. Taking Dachang concealed zinc-copper deposit in northern Guangxi as an example, the source region of gas field is studied. The source region is analyzed by element cluster analysis and factor analysis in geostatistics. The results show that, Since the determined lower limit of anomalies is derived from the normalized system data of the contribution components of the various plastids, the strong anomalies formed in this system background are mainly mineral-induced anomalies. And its anomaly intensity is relatively large and anomaly range is relatively small. The prospecting application and prospecting prediction of Dongshan Pb-Zn deposit and Hongjiapo-Banshantou area around Lala Copper Mine are carried out by means of geo-gas detection. The results show that geo-gas survey is effective in detecting semi-concealed and concealed metal deposits. The main ore-forming elements anomaly has been formed over the orebody, and the detection sensitivity is very high. The buried depth of the orebody can be over 500m (Dongshan deposit). At the same time, the prospecting prediction is carried out on the distribution area of fault F18 / F3 in Dongshan mining area, and the prospecting direction is pointed out. In this paper, the ore prospecting and prediction work is carried out in the Hongjiapo-Banshantou area in the periphery of Lala Copper Mine. The obvious Cu,Zn,Pb anomalies of the earth gas and soil are obtained in the distribution area of sodium volcanic rocks, and the key anomalous areas are delineated as the prospecting target areas.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.2;P632.5
本文編號(hào)：2406376
[Abstract]:Geophysical survey is a new prospecting technique born in 1980s. It has the characteristics of accurate plane projection location and high detection sensitivity. It is one of the most important methods to detect concealed ore deposits at present. Based on the model experiment of earth gas migration, this paper preliminarily discusses the law of earth gas migration and the source region of earth gas field. Taking Dachang concealed zinc and copper deposit in northern Guangxi as an example, the source region of earth gas field of metal deposit is analyzed. The application and prospecting prediction of Dongshan Pb-Zn deposit in western Yunnan and the Hongnipo-Banshantou area around Lala Copper Mine are carried out. The experimental results show that the main ore-forming elements and other trace elements migrate out in varying degrees under the action of heat driven updraft, regardless of the single ore-bed model or the ore-body surrounding rock model. It is shown that the anomalies of the main ore-forming elements in the upwelling air flow caused by the existence of deep concealed orebodies are objective. Different elements have different migration rate and migration ratio due to the different activity of each element relative to the ground airflow. The surrounding rock has obvious influence on the gas field. On the one hand, the surrounding rock has a trapping effect on the upward air flow, thus weakening the content of the main ore-forming elements in the updraft, but with the increase of accumulation time, the content of the elements in the surrounding rock will increase. Furthermore, it will increase the element content in the upwelling air flow, thus increasing the anomaly. On the other hand, the content of the main ore-forming elements in the surrounding rock has an effect on the ground air flow after passing through the surrounding rock, which shows that the metal elements in the surrounding rock are extracted into the passing ground flow, thus increasing the anomalous strength obtained near the surface or the surface of the earth. But generally speaking, it is mainly caused by concealed orebodies that can really form high-intensity anomaly of earth gas. Taking Dachang concealed zinc-copper deposit in northern Guangxi as an example, the source region of gas field is studied. The source region is analyzed by element cluster analysis and factor analysis in geostatistics. The results show that, Since the determined lower limit of anomalies is derived from the normalized system data of the contribution components of the various plastids, the strong anomalies formed in this system background are mainly mineral-induced anomalies. And its anomaly intensity is relatively large and anomaly range is relatively small. The prospecting application and prospecting prediction of Dongshan Pb-Zn deposit and Hongjiapo-Banshantou area around Lala Copper Mine are carried out by means of geo-gas detection. The results show that geo-gas survey is effective in detecting semi-concealed and concealed metal deposits. The main ore-forming elements anomaly has been formed over the orebody, and the detection sensitivity is very high. The buried depth of the orebody can be over 500m (Dongshan deposit). At the same time, the prospecting prediction is carried out on the distribution area of fault F18 / F3 in Dongshan mining area, and the prospecting direction is pointed out. In this paper, the ore prospecting and prediction work is carried out in the Hongjiapo-Banshantou area in the periphery of Lala Copper Mine. The obvious Cu,Zn,Pb anomalies of the earth gas and soil are obtained in the distribution area of sodium volcanic rocks, and the key anomalous areas are delineated as the prospecting target areas.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.2;P632.5
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，本文編號(hào)：2406376
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