發(fā)布時間：2018-10-13 14:47

【摘要】：金龍山金礦是位于南秦嶺鎮(zhèn)旬盆地丁-馬Hg-Sb礦帶西部的超大型微細(xì)浸染型金礦床,自東向西分劃分為金龍山、腰儉、丘嶺和古樓山四個礦段,目前,對腰儉礦段的研究程度較低。為了加快對金龍山金礦深部成礦預(yù)測及礦區(qū)東部汞銻礦帶內(nèi)找金的研究,本文選擇對腰儉礦段地質(zhì)特征、礦石礦物特征、地球化學(xué)特征進(jìn)行研究,總結(jié)次生及原生暈地球化學(xué)特征,對210號礦體深部成礦進(jìn)行預(yù)測,為下一步找礦提供指示信息。本文通過大量野外地質(zhì)調(diào)查,特別是在對210號礦體地質(zhì)特征詳細(xì)研究的基礎(chǔ)上,通過采集標(biāo)本、樣品,并進(jìn)行加工、分析測試,對210號礦體的礦石特征、礦物特征、金的賦存狀態(tài)等進(jìn)行了深入研究。查明210號礦體整體呈北東向展布,地表主要為氧化礦石,深部主要為原生礦石。礦石構(gòu)造主要為角礫狀、脈狀、浸染狀、土狀、蜂窩狀構(gòu)造等。礦石結(jié)構(gòu)主要為自形、半自形、它形不等粒狀結(jié)構(gòu),三連晶結(jié)構(gòu),增生環(huán)帶結(jié)構(gòu),填隙結(jié)構(gòu),交代殘余結(jié)構(gòu)等。金屬礦物有黃鐵礦、含砷黃鐵礦、毒砂、輝銻礦、方鉛礦、自然金、褐鐵礦等。脈石礦物主要為石英和方解石。通過電子探針測試未見到自然金,但測到了金含量,結(jié)合相鄰金龍山礦段金的賦存狀態(tài),金可能以包裹金形式出現(xiàn)。通過對腰儉礦段水系沉積物異常和土壤測量異常特征研究,發(fā)現(xiàn)近礦元素Au主要分布在丘嶺-西坡嶺一帶。金礦(化)體上呈現(xiàn)As、Hg、Au、Ag元素異常值相對較高,異常的點(diǎn)數(shù)多,面積大,濃集中心突出。通過對210號礦體原生暈地球化學(xué)進(jìn)行綜合研究,相關(guān)性和聚類分析顯示,Au比較獨(dú)立,As、Sb、Hg相關(guān)性較好,Cu、Pb、Zn、N i相關(guān)性好。在不同標(biāo)高,前緣元素Hg、Sb,近礦元素Au、尾暈元素Mo、W等有多期疊加,說明該地段可能有多期熱液活動。另外,礦體有向南西西側(cè)伏的特點(diǎn)。金品位變化與礦體厚度之間有弱的正相關(guān)關(guān)系。綜上研究,將前緣元素Hg、Sb,近礦元素Au,尾暈元素Mo的異常疊加在縱投影圖上顯示,210號礦體深部可能存在2個預(yù)富集區(qū),分別是預(yù)測靶位1:20-3線之間,820-900m標(biāo)高之間;預(yù)測靶位2:20-3線之間,830-880m標(biāo)高之間。
[Abstract]:Jinlongshan gold deposit, located in the west of the Ding-Ma Hg-Sb ore belt in the ten-day basin of South Qinling Town, is a super-fine disseminated gold deposit. It is divided from east to west into four sections: Jinlongshan, Yaojian, Qiuling and Guloshan. At present, the gold deposit is divided into four sections: Jinlongshan, Yaojian, Qiuling and Guloshan. The study on the ore section is low. In order to speed up the study of deep metallogenic prediction of Jinlongshan gold deposit and the exploration of gold in the mercury antimony ore belt in the east of the mining area, the geological characteristics, ore mineral characteristics and geochemical characteristics of the Yaojian section are studied in this paper. The geochemical characteristics of secondary and primary halo are summarized and the ore-forming in depth of No. 210 orebody is predicted. Based on a large number of field geological investigations, especially on the basis of the detailed study of the geological characteristics of the 210 orebody, the ore features and mineral characteristics of the 210 orebody are analyzed and tested by collecting samples, processing and testing. The occurrence state of gold is deeply studied. It is found that the 210 ore body is distributed from north to east, the surface is mainly oxidized ore, and the deep ore is mainly primary ore. Ore structure is mainly breccia, vein, disseminated, soil-shaped, honeycomb structure and so on. The ore structure mainly consists of self-shape, semi-automorphism, its unequal granular structure, triple crystal structure, accretive ring structure, interstitial structure, metasomatic residual structure and so on. Metallic minerals include pyrite, arsenopyrite, stibnite, galena, natural gold, limonite and so on. Gangue minerals are mainly quartz and calcite. The natural gold was not found by electron probe test, but the gold content was measured. Combined with the occurrence state of gold in adjacent Jinlongshan mine, gold may appear in the form of wrapped gold. By studying the characteristics of sediment anomaly and soil survey anomaly in Yaojian section, it is found that the near ore element Au mainly distributes in the area of Qiuling and Xipo mountains. The abnormal value of As,Hg,Au,Ag elements is relatively high on the gold (chemical) body, the number of abnormal points is more, the area is large, and the concentration center is prominent. Based on a comprehensive study of the primary halo geochemistry of the 210 orebody, the correlation and cluster analysis show that Au is relatively independent, As,Sb,Hg is well correlated and Cu,Pb,Zn,N I is well correlated. At different elevation, Hg,Sb, near ore element Au, tail halo element Mo,W is superimposed in several phases, which indicates that there may be multi-period hydrothermal activity in this area. In addition, the orebody has the characteristic of lying to the west and south. There is a weak positive correlation between gold grade change and orebody thickness. Based on the above study, the superposition of the anomaly of Au, tail halo element Mo in the front element Hg,Sb, near the ore element Au, shows that there may be two preconcentration areas in the depth of the 210 orebody, which are between 1: 20-3 lines and 820-900m elevation, respectively. The predicted target is between 2: 20-3 lines and 830-880 m elevation.
【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】：P618.51

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本文編號：2268998