控礦構(gòu)造特征及找礦前景分析
(1. 中南大學(xué) 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. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長(zhǎng)沙 410083)
摘 要: 哈圖金礦和薩爾托海金礦區(qū)位于新疆準(zhǔn)噶爾盆地西部。區(qū)內(nèi)沉積巖主要為晚古生代海相火山−沉積巖系，巖漿巖以海西晚期堿性石英二長(zhǎng)巖、石英正長(zhǎng)巖和正長(zhǎng)花崗巖為主，區(qū)內(nèi)構(gòu)造總體為北東南西向的達(dá)爾布特復(fù)背斜和扎拉特復(fù)向斜，海西−印支末期斷裂構(gòu)造展布明顯。研究區(qū)金礦化有剪切帶石英脈型、破碎蝕變巖型、剪切帶超基性巖型、細(xì)脈浸染型四種類型。綜合分析，認(rèn)為本區(qū)金礦化帶的形成與石炭紀(jì)多期次海相火山噴發(fā)活動(dòng)有密切的物質(zhì)來(lái)源關(guān)系，中基巖火山巖為本區(qū)金源提供了豐富的物質(zhì)基礎(chǔ)，區(qū)內(nèi)造山期后的堿性花崗巖類的巨大氣水溶液和熱力作用對(duì)以石炭系火山沉積巖含金源層的長(zhǎng)期活化轉(zhuǎn)移作用并通過(guò)哈圖斷裂帶、安齊斷裂帶和達(dá)爾布特?cái)嗔褞Ъ捌浯渭?jí)構(gòu)造的有利部位，通過(guò)水巖反應(yīng)卸載沉淀而形成4種主要金礦化類型，組成了本區(qū)特有多種類型組合成礦系列。根據(jù)總體成礦規(guī)律，圈定了3個(gè)找礦前景地段。
關(guān)鍵字: 控礦構(gòu)造；哈圖−薩爾托海；金礦帶；西準(zhǔn)噶爾；找礦前景
prospective analysis of Hatu—Saertuohai gold belt in
Western Junggar, Xinjiang
（1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education,
Central South University, Changsha 410083, China;
2. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China）
Abstract:Hatu and Saertuohai gold deposits are located in Western Junggar of Xinjiang. The typical sedimentary rocks in this district are Neopaleozoic volcanic sedimentary rock series and the intrusions are mainly Late Hercynian alkaline quartz monzonite, quartz syenite and syenite granite, moreover, the NE-SW structures named Daerbute compound anticline as well as Zalate compound syncline constitute the major structure of this region and the fault structures dated to Late Hercy-Indosinian are also pervasive. There are four gold mineralization types in these research deposits, like shear zone quartz vein type, clastic altered rock type, shear zone ultrabasic rock type and fine disseminated type. Comprehensively, it is believed that the forming of gold mineralization belt has a strong relationship with Carboniferous multiple volcanic eruption in terms of ore-forming materials, additionally, intermediate-basic volcanic rocks in this district provide abundant materials for gold source. The giant gas-aqueous hydrothermal and the thermal effect coming from post orogenic alkaline granite series play a significant role in secular mobilization of gold-containing ore source bed in Carboniferous volcanic sedimentary rock, then through water-rock interaction as well as the effect of Hatu fault belt, Anqi fault belt, Daerbute fault belt and secondary structures, the ore-forming materials tend to be precipitated to form the four gold mineralization types. According to the general metallogenic regularity, three prospecting targets are delineated.
Key words: ore-controlling structure; Hatu—Saertuohai; gold belt; Western Junggar; prospectiveness
