本文選題：基性-超基性巖　切入點(diǎn)：Cu-Ni硫化物礦床　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：新疆紅石山-坡一地區(qū)位于天山造山帶東段,是中亞巨型成礦帶的重要組成部分之一,也是“一路一帶”礦產(chǎn)開(kāi)發(fā)的熱點(diǎn)地區(qū)。該區(qū)構(gòu)造形跡復(fù)雜,且晚古生代火山巖分布較廣,鎂鐵-超鎂鐵質(zhì)侵入巖十分發(fā)育,形成一系列Cu-Ni硫化物礦床。以區(qū)內(nèi)紅石山、坡一銅鎳硫化物礦床為研究對(duì)象,在對(duì)礦床礦物學(xué)與巖相學(xué)特征、礦床地質(zhì)特征研究的基礎(chǔ)上,著重對(duì)典型礦床剖面進(jìn)行了原生暈地球化學(xué)特征分析與礦體原生暈結(jié)構(gòu)特征的方面進(jìn)行研究,主要通過(guò)數(shù)理統(tǒng)計(jì)學(xué)方法分析確定成礦指示特征元素以及元素的共生組合特征。同時(shí),查明主要成礦元素的空間分布特征,建立成礦元素垂向分帶模式。相關(guān)性分析顯示在紅石山、坡一鎳礦床主成礦元素Ni、Cu與Co、Bi、Ag、Au都有很強(qiáng)的相關(guān)性,可以作為直接指示特征元素。同時(shí),在紅石山鎳礦Ni與Mn、Cr呈強(qiáng)相關(guān),而在坡一鎳礦則相關(guān)性很弱。同時(shí),聚類(lèi)分析、因子分析也闡明了元素組合特征,至少表明了三個(gè)地質(zhì)作用階段:Ni-Cu-Bi-Ag-Au為典型元素的因子代表主成礦階段,晚期巖漿活動(dòng)中熔離作用下的高S含礦熱液富集成礦。以Cr、Mn為典型元素的因子代表基性-超基性巖漿中熔離作用下的硅酸鹽熔體所富含的元素。而F3、F4因子則代表成礦晚期的中低溫?zé)嵋夯顒?dòng)。地表水平異常分析表明原生暈異常在地表水平分帶上,Ni、Cu、Co、Cr元素異常與礦體位置重合,而B(niǎo)i、Ag、Au異常則在礦體附近,另外,Sb、As、Pb、V則與礦體相距甚遠(yuǎn)。而鉆孔原生暈濃度分帶、鉆孔原生暈垂直分帶序列手段,查明了Cu-Ni硫化物礦床的原生暈分帶特征:在垂直分帶上,該礦床典型的前緣暈元素是Pb、V,次之Sb、As,甚至Zn,它們都是中低溫的熱液礦物;近礦暈以Bi、Au為主,成礦暈主要為Cu、Ni、Co,其次為Ag、Cr,尾暈主要可能以Mn為主。
[Abstract]:Located in the eastern section of Tianshan orogenic belt, the Hongshi Mountain-Poe area of Xinjiang is one of the important parts of the giant metallogenic belt in Central Asia and is also a hot spot of mineral exploitation in the "one Road" area. The late Paleozoic volcanic rocks are widely distributed, and the mafic and ultramafic intrusive rocks are well developed, forming a series of Cu-Ni sulphide deposits. Taking the Hongshishan and Po-Cu-Ni sulfide deposits as research objects, the mineralogical and petrographic characteristics of the deposits are discussed. Based on the study of the geological characteristics of the deposit, the geochemical characteristics of the primary halo and the structural characteristics of the primary halo of the orebody are studied in the section of the typical deposit. The metallogenic indicator elements and the symbiotic assemblage characteristics of the elements are determined by means of mathematical statistical analysis. At the same time, the spatial distribution characteristics of the main ore-forming elements are found out. The vertical zonation model of metallogenic elements is established. The correlation analysis shows that the main metallogenic elements NiOCu and Cochon BiAg-Ag-Au are strongly correlated in Hongshishan and Po-Ni deposits, and can be used as direct indicating characteristic elements. At the same time, there is a strong correlation between Ni and Mn-Cr in Hongshishan nickel deposit, and there is a strong correlation between Ni and Mn-Cr in Hongshishan nickel deposit. At the same time, cluster analysis and factor analysis also illustrate the characteristics of element assemblage, indicating at least three geological stages in which the elements of Ni Cu-Bi-Ag-Au represent the main metallogenic stage. High S ore bearing hydrothermal enrichment and mineralization in late magmatic activity. The factors of Cr-Mn as typical elements represent the elements rich in silicate melts in basic-ultrabasic magma, while factor F _ 3N _ 4 represents the elements rich in silicate melts in ultrabasic magma. The surface horizontal anomaly analysis shows that the primary halo anomaly overlaps with that of the orebody on the surface water distribution zone. The Bi-Ag-Ag-au anomaly is located near the orebody, and the SbAg-PbNV is far away from the orebody. The primary halo characteristics of the Cu-Ni sulfide deposit are found out by means of the primary halo concentration zoning and the vertical zoning of the primary halo in the borehole, and the characteristics of the primary halo in the Cu-Ni sulphide deposit are as follows: in the vertical zonation zone, the primary halo zone of the Cu-Ni sulfide deposit is studied. The typical leading halo elements of the deposit are PBV, followed by SbCU and even Zn. they are all hydrothermal minerals of middle and low temperature, the near ore-halo is mainly Bi-ni-au, the ore-forming halo is mainly Cu-NiNiCoCo-Co-ore-forming halo, the next is Agnica Cr-ln, and the tail halo is probably mainly mn.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P632.2;P618.41;P618.63

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 楊永強(qiáng),陳永良,程麗紅;新疆喀拉通克銅鎳礦床綜合信息找礦模型[J];地質(zhì)找礦論叢;1998年03期

2 朱永剛;邵擁軍;劉忠法;;博茨瓦納莫洛波農(nóng)場(chǎng)雜巖體鉆孔原生暈特征及找礦前景分析[J];國(guó)土資源導(dǎo)刊;2012年12期

3 鄭大中,鄭若鋒;銅鎳硫化物礦床的成礦機(jī)理新探[J];四川地質(zhì)學(xué)報(bào);1999年01期

4 樸壽成，，楊永強(qiáng)，連長(zhǎng)云;原生暈分帶序列研究方法綜述[J];世界地質(zhì);1996年01期

5 邢利琦;劉炳璋;;礦床原生地球化學(xué)暈分帶性研究[J];四川地質(zhì)學(xué)報(bào);2011年04期

6 錢(qián)壯志;王建中;姜常義;焦建剛;閆海卿;何克;孫濤;;喀拉通克銅鎳礦床鉑族元素地球化學(xué)特征及其成礦作用意義[J];巖石學(xué)報(bào);2009年04期

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