發(fā)布時(shí)間：2018-03-26 10:12

  本文選題：康古爾金礦　切入點(diǎn)：構(gòu)造疊加暈　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：康古爾金礦位于新疆東天山秋格明塔什—黃山韌性剪切帶西段南緣,賦礦巖石主要為下石炭統(tǒng)雅滿蘇組鈣堿性火山巖、火山碎屑巖等。本文通過(guò)鉆孔和井下坑道系統(tǒng)采樣,研究了康古爾金礦不同成礦階段的礦床元素組合、元素之間的相關(guān)性、元素垂向分帶序列、構(gòu)造疊加暈特征等,最后建立了構(gòu)造疊加暈?zāi)Ｐ筒⑦M(jìn)行了深部盲礦預(yù)測(cè)。同時(shí),通過(guò)從礦區(qū)巖(礦)石主量元素、微量元素、稀土元素特征及H、O、Pb、S同位素特征等方面分析了康古爾金礦的礦床地球化學(xué)特征、控礦因素、成礦流體特征及來(lái)源、成礦物質(zhì)來(lái)源等,并研究了成巖時(shí)代、成礦時(shí)代與區(qū)域構(gòu)造演化之間的耦合關(guān)系,總結(jié)了礦床成因和礦床模型。論文取得了以下主要成果和認(rèn)識(shí):(1)通過(guò)對(duì)礦石微量元素進(jìn)行相關(guān)分析發(fā)現(xiàn)Hg與Au的相關(guān)系數(shù)達(dá)0.61,可將Hg作為康古爾金礦找礦的重要指示元素。Au與Pb、Zn也具有較高的相關(guān)性,而Cu與其他元素相關(guān)性弱且主要分布于金礦下部,推測(cè)銅礦的形成可能為另一期成礦事件。(2)查明康古爾金礦單一期次成礦成暈軸向分帶序列,As、Sb、Hg(前緣暈)→Au、Ag、Cu、Pb、Zn、Cd(近礦暈)→Bi、Mo、Mn、Co、V、W(尾暈),以及元素垂向分帶序列為Hg-Pb-Zn-Bi-Co-Mo-Mn-Au-Sb-As-Ag-Cd-W-V-Cu,為“反分帶”序列,指示成礦作用有疊加。(3)巖礦石微量元素、稀土元素及Pb、S同位素特征等表明成礦物質(zhì)來(lái)源主要是次火山巖,另外地層提供了部分成礦物質(zhì),次火山巖的侵入為主要的控礦因素,Pb、S主要來(lái)源于地幔。(4)成巖時(shí)代、成礦時(shí)代與區(qū)域構(gòu)造演化之間的耦合關(guān)系表明康古爾金礦為兩期成礦作用,成礦主因分別為早二疊世次火山巖的侵入和晚二疊世秋格明塔什—黃山韌性剪切帶右行走滑剪切作用,結(jié)合H、O同位素特征認(rèn)為成礦流體演化具有火山次火山熱液為主→混合熱液→大氣降水為主的演化趨勢(shì),綜合認(rèn)為康古爾金礦為受韌性剪切帶控制的產(chǎn)于火山巖次火山巖中的造山帶型中低溫?zé)嵋旱V床。
[Abstract]:The Kangguer gold deposit is located in the southern margin of Qiugingtash-Huangshan ductile shear zone in eastern Tianshan, Xinjiang. The ore-bearing rocks are mainly calc-alkaline volcanic rocks and pyroclastic rocks of the Yamensu formation in the Lower Carboniferous. The element assemblages, the correlation among elements, the vertical zoning sequence of elements, the characteristics of structural superimposed halo in Kangguer gold deposit at different metallogenic stages are studied. Finally, the structural superimposed halo model is established and the deep blind ore is predicted. The geochemical characteristics, ore-controlling factors, ore-forming fluid characteristics and ore-forming material sources of Kangguer gold deposit are analyzed from the main elements of rock (ore), trace elements, rare earth elements and the isotopic characteristics of HGO _ O _ (P _ (b)) S, etc. The coupling relationship between diagenetic age, metallogenic age and regional tectonic evolution is also studied. This paper summarizes the genesis and model of ore deposits. The paper has obtained the following main achievements and understanding: (1) through the correlation analysis of trace elements in ore, it is found that the correlation coefficient between Hg and au is 0.61, which can be regarded as an important prospecting for Kangguer gold deposit. There was also a high correlation between the indicating element. Au and PBO Zn. The correlation between Cu and other elements is weak and mainly distributed in the lower part of the gold deposit. It is speculated that the formation of copper deposit may be another metallogenic event. 鈫扐u-Ag-Ag-CU PbPbPbPbCU (near Ore Halo). 鈫扵he vertical zonation sequence of elements is Hg-Pb-Zn-Bi-Co-Mo-Mn-Au-Sb-As-Ag-Cd-W-V-Cu, indicating that the ore-forming process has superimposed ore trace elements, rare earth elements and PBS isotopic characteristics, indicating that the ore-forming material is mainly derived from subvolcanic rocks, and the vertical zonation sequence of elements is Hg-Pb-Zn-Bi-Co-Mo-Mn-Au-Sb-As-Ag-Cd-W-V-Cu, indicating that the ore-forming process has superimposed ore trace elements, rare earth elements and PBS isotopic characteristics. In addition, the strata provide part of the ore-forming material, and the subvolcanic intrusion is the main ore-controlling factor (PbPbSs). The coupling relationship between the metallogenic age and the regional tectonic evolution indicates that the Kangguer gold deposit is a two-stage metallogenic process. The main metallogenic factors are the intrusions of early Permian subvolcanic rocks and the right-strike-slip shear of late Permian Qiugingtash-Huangshan ductile shear zone. Combined with the Hau O isotopic characteristics, the ore-forming fluid evolution is dominated by volcanic subvolcanic hydrothermal solution. 鈫扢ixed hydrothermal solution. 鈫捍t is considered that Kangguer gold deposit is a middle-low temperature hydrothermal deposit controlled by ductile shear zone in volcanic subvolcanic rocks.
【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
【分類號(hào)】：P618.51

【共引文獻(xiàn)】

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本文編號(hào)：1667454