【摘要】：北巴顏喀拉成礦帶內(nèi)礦種豐富多樣,已發(fā)現(xiàn)的有:Au、Sb、Hg、As、Cu、W等。研究區(qū)因位于該成礦帶內(nèi)而具有優(yōu)越的構(gòu)造成礦環(huán)境、豐富的成礦物質(zhì)來源,其綜合成礦能力大、成礦遠(yuǎn)景好。本文在總結(jié)分析地質(zhì)、地球化學(xué)、地球物理、遙感等特征的基礎(chǔ)上,指明本區(qū)找礦方向,圈定有利找礦遠(yuǎn)景區(qū)。本文取得的主要認(rèn)識有以下幾點(diǎn):(1)研究區(qū)廣泛發(fā)育的地層為三疊系地層,同時該套地層作為多種成礦元素高度富集的層位,也是本區(qū)的主要賦礦地層。研究區(qū)內(nèi)的主干構(gòu)造為北西向的斷裂構(gòu)造,其控制了研究區(qū)內(nèi)巖漿巖、熱液活動以及地球化學(xué)異常的分布。研究區(qū)內(nèi)廣泛分布的石英脈與成礦關(guān)系非常密切。研究區(qū)內(nèi)的主要礦化種類為輝銻礦化,其次為輝鉬礦化和孔雀石化。區(qū)內(nèi)的蝕變有硅化、高嶺土化、綠簾石化等,其中硅化與礦化關(guān)系最為密切。(2)Sb、As、Au、Cu、Hg、Ag等幾種元素為研究區(qū)內(nèi)的主要成礦元素,這一結(jié)果與區(qū)域上地球化學(xué)分帶相符,同時這一結(jié)果也說明在研究區(qū)內(nèi)成礦作用以中低溫成礦作用為主導(dǎo)。(3)Sb、As、Au等元素組合成礦的可能性較大,而Ag、Cu、Hg等單獨(dú)成礦的可能性較大。這為該地區(qū)的礦產(chǎn)評價工作確定了方向。對各成礦元素進(jìn)行的分形分布研究表明,區(qū)內(nèi)成礦元素的富集機(jī)制不同或者是萃取期次不同。(4)通過對各類信息對比,總結(jié)出在高海拔、高覆蓋地區(qū),以地球化學(xué)手段為主導(dǎo),輔以地球物理和遙感信息的找礦方法較為有效。通過圈定地球化學(xué)綜合異常,并結(jié)合區(qū)內(nèi)的成礦事實(shí),可有效地提高礦產(chǎn)資源評價效率。以地球化學(xué)特征和成礦地質(zhì)特征為主導(dǎo),在研究區(qū)共劃分出5處成礦遠(yuǎn)景區(qū),Ⅰ級遠(yuǎn)景區(qū)一處,Ⅱ級遠(yuǎn)景區(qū)一處,Ⅲ級遠(yuǎn)景區(qū)三處。各成礦遠(yuǎn)景區(qū)組合地球化學(xué)異常特征均表現(xiàn)出以Sb、As、Au為主異常元素的特征。
[Abstract]:The ore species in the northern Bayan Kara metallogenic belt are rich and diverse, which have been discovered: Au,Sb,Hg,As,Cu,W et al. Because it is located in the metallogenic belt, the study area has a superior tectonic metallogenic environment and abundant ore-forming material sources, its comprehensive metallogenic ability is large, and the metallogenic prospect is good. On the basis of summarizing and analyzing the characteristics of geology, geochemistry, geophysics and remote sensing, this paper points out the direction of prospecting in this area and delineates the favorable prospecting area. The main conclusions obtained in this paper are as follows: (1) the strata widely developed in the study area are Triassic strata, which are also the main ore-bearing strata in this area as a highly enriched horizon of various metallogenic elements. The main structure in the study area is a NW fault structure, which controls the distribution of magmatic rocks, hydrothermal activities and geochemical anomalies in the study area. The widely distributed quartz veins in the study area are closely related to mineralization. The main mineralization types in the study area are stibnite followed by molybdenum mineralization and peacock petrifaction. The alteration in the area includes silicification, kaolinization, green curtain fossilization, among which silicification and mineralization are the most closely related elements. (2) several elements, such as Sb,As,Au,Cu,Hg,Ag, are the main metallogenic elements in the study area. This result is consistent with the geochemical zoning in the region, and it also shows that mineralization is dominated by mineralization at moderate and low temperatures in the study area. (3) Sb,As,Au and other elements are more likely to be combined and metallogenic, while Ag,Cu, is more likely. Hg and other individual mineralization are more likely. This has set the direction for the mineral evaluation work in this area. The study on fractal distribution of metallogenic elements shows that the enrichment mechanism of ore-forming elements in this area is different or the times of extraction are different. (4) by comparing various kinds of information, it is concluded that in high altitude and high cover areas, The geochemical method, supplemented by geophysical and remote sensing information, is more effective. The evaluation efficiency of mineral resources can be effectively improved by delineating comprehensive geochemical anomalies and combining with the metallogenic facts in the area. Based on geochemical characteristics and ore-forming geological characteristics, there are five metallogenic scenic spots in the study area, one in Grade 鈪，

本文編號：2400336