發(fā)布時間：2018-05-02 23:12

  本文選題：黔西北 + 五指山��； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：原生暈找礦法自20世紀(jì)50年代被提出以來,經(jīng)過國外內(nèi)諸多地質(zhì)工作者與學(xué)者在不同成因類型礦床中的實踐與應(yīng)用,已為國內(nèi)外地球化學(xué)找礦研究者所接受,被認(rèn)為是一種較為成熟且有效的熱液礦床找礦預(yù)測手段。納雍枝鉛鋅礦床位于川滇黔鉛鋅成礦域的東南側(cè),黔中隆起的南緣及滇東隆起的西側(cè),是近年來于貴州省境內(nèi)發(fā)現(xiàn)并評價的一個大型鉛鋅礦床,亦是五指山鉛鋅礦集區(qū)的一部分,礦集區(qū)內(nèi)沿五指山背斜軸向發(fā)育有7個小-大型鉛鋅礦床,已探明和發(fā)現(xiàn)的礦體多達(dá)20余個,其中納雍枝礦床是該礦集區(qū)內(nèi)儲量最大的典型礦床。.通過對納雍枝礦床4號勘探線及1270中段進行詳細(xì)的地質(zhì)編錄和采樣,采用分帶序列研究、數(shù)理統(tǒng)計分析和原生暈組成比對等方法,系統(tǒng)地研究了該礦床V-1號礦體原生暈的分帶特征,其研究內(nèi)容主要包括以下三個方面:①原生暈中指示元素的組成和強度;②各帶的分布范圍、大小及形狀;③組份的分帶與集合,并在此基礎(chǔ)上對深部區(qū)域的含礦性作出了評價。其研究結(jié)果表明:①利用格里戈良分帶指數(shù)法進行計算,納雍枝鉛鋅礦床V-1號礦體軸向分帶序列為Mo-Ni-Sn-Co-Cu-Zn-Cd-Hg-Pb-As-Sb-Mn;②原生暈在空間上延伸有限,前緣暈-近礦暈-尾暈明顯,前緣暈元素組合為Ag-Sb-Mn;近礦暈元素組合為Zn-Pb-Cd-Hg;尾暈元素組合為Cu-Ni-SnCo-Mo;③成暈指示元素在空間上的強度具有由淺部向深部內(nèi)帶范圍增大,且在深部中段的近礦暈于尾暈有一定程度重合的規(guī)律性變化;④成暈指示元素在空間上的形態(tài)展布具有與礦體近似的平行分帶特征,軸向分帶序列與火山熱液型鉛鋅礦床原生暈分帶存在較為明顯的差異:⑤通過對成暈元素進行多元統(tǒng)計分析,認(rèn)為指示元素組合的分帶性受礦床成因控制明顯,成暈元素組合與礦石礦物的元素組合具有較大的關(guān)聯(lián)性;⑥因子分析的研究結(jié)果表明,該礦床成礦溫度為低溫,且成礦物質(zhì)來源具有深源的特征;⑦通過研究因子得分在空間上的分布形態(tài)規(guī)律,表明成礦元素在成礦過程中產(chǎn)生了差異性沉淀,且流體在運移過程中分異特征明顯。⑧通過原生暈對應(yīng)分帶元素的比值建立了找礦指標(biāo),指標(biāo)表面在靠近背斜核部的深處找礦指示元素再次富集,具有良好的找礦前景。
[Abstract]:Since the primary halo prospecting method was put forward in 1950s, through the practice and application of many geologists and scholars in different genetic types of deposits, it has been accepted by domestic and foreign geochemical prospecting researchers. It is considered to be a more mature and effective method for ore prospecting and prediction of hydrothermal deposits. The Nayongzhi Pb-Zn deposit is located in the southeast of the Pb-Zn metallogenic domain in Sichuan, Yunnan and Guizhou, the southern margin of the central Guizhou uplift and the west side of the eastern Yunnan uplift. It is a large Pb-Zn deposit discovered and evaluated in Guizhou Province in recent years. It is also a part of the Wuzhishan lead-zinc ore concentration area, where there are 7 small and large lead-zinc deposits developed along the leaning axis of the Wuzhishan backside, and more than 20 ore bodies have been discovered and discovered. The Nayongzhi deposit is the typical deposit with the largest reserves in the ore concentration area. Through the detailed geological cataloguing and sampling of the exploration line No. 4 and the middle section 1270 of the Nayongzhi deposit, the methods of zonation sequence study, mathematical statistical analysis and primary halo composition alignment are adopted. The zonation characteristics of the primary halo in the V-1 orebody of the deposit are systematically studied. The main contents of the study include the following three aspects: the composition of the indicating elements in the primary halo and the distribution range, size and shape of the indicating elements in the primary halo. On the basis of the zonation and collection of the three components, the ore-bearing property of the deep region is evaluated. The results show that the axial zonation sequence of the V-1 ore body of the Nayongzhi Pb-Zn deposit is Mo-Ni-Sn-Co-Cu-Zn-Cd-Hg-Pb-As-Sb-Mn2 primary halo, which has a limited extension in space, and the frontal halo-near ore-area-tail halo is obvious. The leading halo element assemblage is Ag-Sb-Mn, the near ore halo element combination is Zn-Pb-Cd-Hg, and the tail halo element assemblage is Cu-Ni-SnCo-Mo-3 halo indicating that the spatial strength of the halo elements increases from shallow to deep. In the middle part of the deep section, the near ore halo and the tail halo have a certain degree of overlap. The spatial distribution of the elements indicating the formation of the halo is similar to that of the orebody, and the distribution of the elements is similar to that of the orebody. There are obvious differences between the axial zonation sequence and the primary halo zoning of volcanic hydrothermal lead-zinc deposits. Through the multivariate statistical analysis of halo elements, it is considered that the zoning of indicator element assemblages is obviously controlled by the genesis of the deposit. The results of 6 factor analysis show that the ore-forming temperature of the deposit is low and the ore-forming source has the characteristics of deep source. (7) by studying the spatial distribution pattern of factor score, it is shown that the metallogenic elements have different precipitation in the metallogenic process. In the process of migration, the differentiation characteristics of fluid are obvious .8 the prospecting index is established by the ratio of the primary halo corresponding to the zonation element, and the index surface is enriched again in the depth near the anticline core, which has a good prospecting prospect.
【學(xué)位授予單位】：昆明理工大學(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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本文編號：1835892