(1. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院 有色金屬成礦預(yù)測(cè)教育部重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083；
2. 湖南省有色地質(zhì)勘查局 二總隊(duì)，湘潭 411102)
摘 要: 對(duì)礦區(qū)的控礦斷裂構(gòu)造及其構(gòu)造疊加暈進(jìn)行研究，建立構(gòu)造疊加暈的模型，并對(duì)深部進(jìn)行成礦預(yù)測(cè)。認(rèn)為控礦斷裂構(gòu)造形成于燕山期火山活動(dòng)，容礦構(gòu)造的優(yōu)勢(shì)方位為NE63°；Ag與Au元素成礦最密切，前緣暈元素為Hg、Sb、As和Ba，近礦暈元素為Au、Ag、Cu、Pb和Zn，尾暈元素為Co、Ni、Mn、W、Mo和Bi；構(gòu)造疊加暈具明顯的反分帶特征，尾暈元素Mn、Bi出現(xiàn)在上部，前緣暈元素Hg、Sb、Ba出現(xiàn)在中部，近礦元素Zn和前緣暈元素As處于下部，以及地球化學(xué)參數(shù)的變化，均指示深部有盲礦體的存在；預(yù)測(cè)結(jié)果表明：0線深部在250~50 m標(biāo)高內(nèi)出現(xiàn)預(yù)測(cè)的盲礦體，其中心定位于200 m標(biāo)高左右，傾向延深長(zhǎng)度為100 m左右。
關(guān)鍵字: 金銀礦床；構(gòu)造疊加暈；成礦預(yù)測(cè)
（1. Key Laboratory of Non-ferrous Metals Metallogenic Prediction, Ministry of Education, School of Geosciences and Info-physics, Central South University, Changsha 410083, China;
2. Second Geological Party of Hunan Bureau, Nonferrous Geological Prospecting, Xiangtan 411102, China）
Abstract:Luoshan Au-Ag deposit is located in the center of NE-striking Yuyao-Longquan uplift belt, which is a significant precious metals mineralization zone in South China. The metallogenic structures and primary halo of this deposit were studied in order to establish the structural superimposed halo model and forecast deep mineralization. The analysis of the tectonic evolution indicates that metallogenic structures are formed during volcanic activity in Yanshan period. The dominant orientation of metallogenic structures (NE63°) was determined by statistical analysis of the ore-bearing structure. Ag and Au are found to be close related to mineralization after correlation analysis on Au、Ag、Cu、Pb, Zn, Co, Ni, Mn, Ba, As, Sb, Bi, Hg, W, Mo elements. R-type cluster analysis suggests the element combination characteristics are as follows: Hg, Sb, As, Ba (front halo)—Au, Ag, Cu, Pb, Zn (near-ore halo)—Co, Ni, Mn, W, Mo, Bi (rear halo). Axial zoning sequence of the zero-line elements, determined through Grigorian method, is Ag-Mn-Bi-Hg-Sb-Ba-Cu-Au-Pb-Mo-As-Zn-W-Co-Ni. Mn and Bi (rear halo elements) are in the upper zone. Hg, Sb, Ba (front halo elements) are in the middle zone; Zn (near halo element) and As (front halo element) are in the lower zone. The reverse zoning sequence indicates that there is a blind ore body located at depth of this deposit. Based on the ore-body characteristics, predicted blind ore body is located at the zero line depth of 250-50 m, and the length along dipping direction is around 100 m.
Key words: gold and silver deposit; structural superimposed halo; metallogenic prediction
