本文選題：地電化學(xué)測量 + 洛恪頓鉛鋅多金屬礦�。� 參考：《中國地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：近年來,隨著地質(zhì)勘探工作的不斷深入,地表露頭礦及淺部礦逐年減少,覆蓋區(qū)找礦已經(jīng)成為地質(zhì)勘查工作的重點。而常規(guī)化探方法對于埋藏較深的礦床找礦效果不好。因此,國內(nèi)外學(xué)者研發(fā)了一些非常規(guī)的化探方法技術(shù),以應(yīng)用于覆蓋區(qū)的礦產(chǎn)勘查工作。地電化學(xué)就是其中應(yīng)用較多的一種,其原理在人工外加電場作用下,將近地表介質(zhì)中電活動態(tài)物質(zhì)選擇性提取至指定接收電極,研究載體中的電提取元素組合、含量分布及異常特征,進而提供找礦信息的一種勘查方法。本文工作區(qū)的洛恪頓鉛鋅多金屬礦床為典型的隱伏礦床,礦區(qū)位于國家重點整裝勘查區(qū)-東烏旗整裝勘查區(qū)內(nèi),該礦床至今還處于勘查階段,尚無采礦污染,是開展地電化學(xué)勘查試驗較理想的地區(qū)。本次研究工作主要包括以下四個方面:1、本文選擇I勘探區(qū)5勘探線開展了地電化學(xué)勘查有效性及方法技術(shù)條件試驗。有效性試驗結(jié)果表明,在見礦鉆孔上方,地電化學(xué)勘查結(jié)果呈現(xiàn)出明顯的成礦元素異常組合,說明地電化學(xué)方法在該礦區(qū)能夠有效地指示深部礦體;提取條件試驗結(jié)果表明,高密度泡塑載體物質(zhì)(28kg/m3)電提取效果大大優(yōu)于低密度泡塑(18kg/m3),低密度泡塑增加提取時間后提取效果變好,結(jié)合提取效率等因素,綜合確定適用于本區(qū)的電提取條件為高密度泡塑載體,提取時間24小時。2、測區(qū)同時開展了地電化學(xué)和土壤地球化學(xué)測量。測量結(jié)果表明,依據(jù)本次提取條件試驗結(jié)果所進行的地電化學(xué)測量優(yōu)于土壤測量。地電化學(xué)測量能夠有效地反映見礦鉆孔Pb、Zn、Ag、As、Cd等多元素礦化異常。土壤測量僅能在出露區(qū)發(fā)現(xiàn)異常,受地形因素影響較大。3、抽稀試驗表明,在東烏旗風(fēng)成沙淺覆蓋景觀區(qū),1點/km2面積性地電化學(xué)勘查可圈定找礦遠景區(qū),4點/km2即可較好的圈定找礦靶區(qū),16點/km2可用于圈定礦體。4、本文開展了地電化學(xué)異常形成機理研究,將電提取后的泡塑在掃描電鏡(SEM)下觀察,發(fā)現(xiàn)大量的數(shù)微米-數(shù)十微米的粘土礦物顆粒,深部礦體中元素的電活動信息一部分與粘土礦物有關(guān)。
[Abstract]:In recent years, with the deepening of geological exploration work, the surface outcrop mines and shallow mines are decreasing year by year, and the prospecting in covered areas has become the focus of geological exploration work.The conventional geochemical prospecting method is not effective for the deeper deposit prospecting.Therefore, some unconventional geochemical prospecting techniques have been developed by domestic and foreign scholars to be applied to the exploration of mineral resources in covered areas.Geoelectrochemistry is one of the most widely used methods. Under the action of artificial applied electric field, the principle of geoelectrochemistry is to selectively extract the electroactive dynamic substance from the surface medium to the designated receiving electrode, and to study the combination of the electroextraction elements in the carrier.Content distribution and abnormal characteristics, and then provides a prospecting method for prospecting information.The Luokedun Pb-Zn polymetallic deposit in the working area of this paper is a typical concealed deposit. The ore area is located in the Dongwuqi integrated exploration area, which is a national key integrated exploration area. The deposit is still in the exploration stage, and there is no mining pollution.It is an ideal area to carry out geoelectrochemical exploration test.The research work includes four aspects as follows: 1. In this paper, the effectiveness and technical conditions of geoelectrochemical exploration are tested in the fifth exploration line in exploration area I.The results of effectiveness test show that the geochemical prospecting results show obvious association of ore-forming elements above the ore-forming boreholes, which indicates that the geoelectrochemical method can effectively indicate the deep orebodies in the mining area, and the results of extraction conditions test show that the geoelectrochemical method can effectively indicate the deep orebodies in the mining area.The electric extraction effect of high density foam plastic carrier material is much better than that of low density foam plastic carrier material (28 kg / m 3). The extraction effect of low density foam plastic is improved after the extraction time is increased, and the extraction efficiency is combined with factors such as extraction efficiency.The conditions suitable for electric extraction in this area were determined as high density foam carrier and extraction time of 24 hours. Geoelectrochemical and soil geochemistry measurements were carried out at the same time.The results show that the geoelectrochemical measurement based on the extraction conditions is better than the soil measurement.Geoelectrochemical measurements can effectively reflect the multi-element mineralization anomalies such as PBG, Zn, Ag, as, CD and so on.Soil survey can only find anomalies in the exposed area, which is greatly affected by topographic factors. The thinning test shows that,In Dongwuqi wind-sand shallow coverage landscape area of 1 / km ~ 2 geoelectrochemical exploration can be used to delineate ore-prospecting target area of 16 points / km ~ 2. In this paper, the formation mechanism of geoelectrochemical anomaly is studied, which can be used to delineate ore-bodies at 16 points / km ~ 2, which can be used to delineate orebody.A large number of micron-tens of micron clay mineral particles were observed under scanning electron microscope (SEM). The electrical activity information of elements in the deep ore body was partly related to clay minerals.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.2;P632

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本文編號：1765410