【摘要】：蝕變巖型金礦床中金常以"大顆粒金"形式存在,但針對其在蝕變礦化帶中分布規(guī)律的研究相對缺乏。而且,采樣及分析化驗方法選擇不當會導(dǎo)致測試結(jié)果與真實情況存在較大偏差,影響客觀準確地評價找礦潛力。本文對寧夏樹龍溝金礦床開展人工重砂研究,以期確定金的賦存狀態(tài)、研究自然金的分布規(guī)律,以此指導(dǎo)區(qū)內(nèi)相關(guān)勘查工作的具體部署。樹龍溝金礦床為蝕變巖型金礦,受區(qū)內(nèi)NE向斷裂構(gòu)造控制,從蝕變中心向兩側(cè)分別發(fā)育石英黃鐵礦化帶-伊利石黃鐵礦化帶-伊利石綠泥石化帶,蝕變帶寬度累計約10~20 m。采集的101件人工重砂樣品中含自然金樣品共計74件,其中粗粒金(0.07 mm)樣品總量達62.4%。通過區(qū)內(nèi)各類蝕變(礦化)相關(guān)的礦物與金含量關(guān)系的系統(tǒng)對比后發(fā)現(xiàn):(1)自然金含量與褐鐵礦呈正相關(guān)關(guān)系,與石英呈負相關(guān)關(guān)系,與黃鐵礦的關(guān)系復(fù)雜;(2)伊利石黃鐵礦化帶中的自然金含量高于石英黃鐵礦化帶和伊利石綠泥石化帶;(3)礦區(qū)基性巖脈與金無成因聯(lián)系,基性脈巖及其后期破碎為金礦化提供了構(gòu)造通道。本文認為在該區(qū)找礦工作中應(yīng)該將伊利石黃鐵礦化及石英黃鐵礦化作為重要的找礦標志。本礦床自然金屬于粗粒-巨粒,礦石中金含量的測定應(yīng)選用針對明金的過篩火試金等分析方法。
[Abstract]:Gold in altered rock type gold deposit often exists in the form of "large grain gold", but the study on its distribution in altered mineralization zone is relatively scarce. Moreover, the improper selection of sampling and analysis methods will lead to a large deviation between the test results and the real situation, which will affect the objective and accurate evaluation of the prospecting potential. In this paper, a study of artificial heavy sand is carried out on the Shulonggou gold deposit in Ningxia in order to determine the occurrence state of gold and to study the distribution law of natural gold, so as to guide the specific arrangement of the related exploration work in the area. The Shulonggou gold deposit is a altered rock type gold deposit, which is controlled by the NE trending fault structure in the area. From the alteration center to the two sides, the quartz pyrite belt and the Illite green mud petrochemical belt are developed respectively. The width of the alteration zone is about 10 ~ 20 m. A total of 74 samples containing natural gold were collected from 101 artificial heavy sand samples, of which the total amount of coarse grained gold (0.07 mm) was 62.4%. It is found that (1) the natural gold content has a positive correlation with limonite, a negative correlation with quartz, and a complex relationship with pyrite; (2) the natural gold content in the Illite pyritization zone is higher than that in the quartz pyrite zone and the Illite green mud zone, (3) the basic vein of the mining area has no genetic relationship with the gold, and the basic-dike rocks and their later fragmentation provide the structural channel for the gold mineralization. In this paper, it is suggested that Illite pyrite and quartz pyrite should be regarded as important prospecting indicators in the prospecting work in this area. The natural gold in this deposit belongs to coarse grain and giant grain.
【作者單位】： 中國地質(zhì)大學(xué)(北京)地球科學(xué)與資源學(xué)院;中國石油華北油田分公司勘探開發(fā)研究院;中國地質(zhì)大學(xué)(武漢)資源學(xué)院;江蘇省地質(zhì)調(diào)查研究院;
【基金】：寧夏石嘴山市樹龍溝 麥子井金銅礦預(yù)查項目(2013DKJJ08)資助
【分類號】：P618.51

【相似文獻】

相關(guān)期刊論文 前10條

1 楊顏忠;;重砂中鈳鉭鐵y&與鈦鐵y&的快速分離法[J];地質(zhì)與勘探;1957年24期

2 羅璋;關(guān)于選擇重砂位置的幾點體會[J];技術(shù)革新與科學(xué)研究;1958年S2期

3 ;他們提高了重砂取樣效率[J];技術(shù)革新與科學(xué)研究;1958年S2期

4 _5耀華;;用吹c詵ㄊ怪厴皔&物分栤的一點}撗閇J];地質(zhì)月刊;1958年04期

5 劉大瞻;;自然重砂測量中幾個值得重視的問題[J];吉林地質(zhì);1986年03期

6 嚴向軍;劉勇;曾明中;全浩理;;湖北省自然重砂異常圈定及找礦指示意義淺析[J];資源環(huán)境與工程;2008年S2期

7 劉曉亮;;微化分析法在重砂鑒定中的應(yīng)用[J];化學(xué)工程與裝備;2012年11期

8 鄭振東;;薄膜反應(yīng)后分離，

本文編號：2417601