喬夏哈拉式鐵銅金礦成礦模式及其找礦意義-免費閱讀
【正文】 ②written records: it was recorded in the regional report of Fuyun at scale of 1:200 000 in 1978 as a smallscale Fe deposit and Cu occurrence. In recent years, Fe ore resources have reached 4620 000 t, Cu 31200 t and Au 1051 kg.(3) Geophysical criteria:①gravity: the gravity anomaly in Qiaoxiahala was lineary consist with the tectonic striking as the high value of gravity。pact massive chalcopyrite ore. Alterations in the wall rocks developed well including epidotization, chloritization, carbonatization, sericitization, quartz, pyrite, tremolite et al (Ni Liang, 2004). Minerogenetic patternThe Qiaxiahala FeCuAu deposit was supposed to be formed by marine volcanicsedimentary mineralization enriched by later hydrothermal activity. The ArAr plateau age of hornblende in diorite from the western mining sector as almost vertically cutting the iron bed was 177。Minerogenetic model of Qiaoxiahalatype FeCuAu deposits and its prospecting significanceAssissted by the project named “Assessment on the mineral resources in the significant metallogenic regions of West China”Ying Lijuan1 Wang Denghong2 Liang Ting3 Zhou Ruhong41. Graduate Department, Chinese Academy of Geological Sciences, Beijing 1000372. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 1000373. Chang’an University, Xi’an, 710054。(5)遙感信息標(biāo)志：喬夏哈拉的遙感信息資料暫無。該異常區(qū)的航磁特點是強度大，變化劇烈，梯度陡，形成向北突起的弧形航磁異常帶。1960～1961年阿爾泰地質(zhì)大隊進行初勘，確定為小型礦床(1∶20萬富蘊幅，1978)。 找礦模型 礦床式的找礦模型可從以下幾個方面考慮：地質(zhì)條件；找礦歷史標(biāo)志；地球物理標(biāo)志；地球化學(xué)標(biāo)志；遙感信息標(biāo)志和地表找礦標(biāo)志。 硫同位素資料中，黃鐵礦d34S值為+‰～+‰，平均值+‰；黃銅礦d34S值為+‰～+‰，平均值+‰，說明黃鐵礦、黃銅礦中硫來源于地幔(李泰德，2002)。 成因模式喬夏哈拉為火山沉積后期熱液疊加成因鐵銅金礦床，形成火山沉積成因塊狀、條帶狀磁鐵礦礦石和熱液交代成因細脈浸染狀黃銅礦礦石、塊狀黃銅礦礦石和層紋狀磁鐵礦礦石。CuAu，分別對應(yīng)于磁鐵礦礦石174。如，在西礦段：礦體呈扁豆?fàn)罨虬鍫?，局部為透鏡狀；在東礦段：礦體呈不規(guī)則的疙瘩狀、團塊狀和透鏡狀，長軸走向與巖層一致。2 喬夏哈拉式鐵銅金礦的成礦模式新疆阿爾泰喬夏哈拉鐵銅金礦床是喬夏哈拉式鐵銅金礦床的典型代表。4. Bureau of Geology and Mineral Resources in Xinjiang, Wulumuqi, 830000Abstract: The Qiaoxiahala ironcoppergold deposit as a typical ore deposit presents Qiaoxiahalatype mineral deposits, a group of ironcoppergold deposits related to volcanism in Early Paleozoic. This paper has expounded the describing pattern, metallogenetic pattern and prospecting model of Qiaoxiahalatype mineral deposits in details.Key words: Qiaoxiahalatype, models of mineral deposits, minerogenetic series of mineral deposits, mineral deposit type摘要：新疆阿爾泰喬夏哈拉鐵銅金礦床作為喬夏哈拉式的典型礦床，代表了一組阿爾泰地區(qū)與早古生代海西期火山作用有關(guān)的鐵銅金礦床。礦床成礦系列的序次為礦床成礦系列組合、礦床成礦系列類型；礦床成礦系列；礦床成礦亞系列；礦床式和礦床(陳毓川等，2006)。西礦區(qū)基性火山巖中磁鐵礦礦體為主，有Fe11，F(xiàn)e12，Cu11，Cu12等；東礦區(qū)以銅金礦體為主，有I～VII號礦體，III號為主。喬夏哈拉鐵銅金礦床位于阿爾泰山南緣額爾齊斯斷裂的南側(cè)，其含礦地層為中泥盆統(tǒng)北塔山組(D2b)，磁鐵礦體的直接容礦圍巖為凝灰砂巖、沉凝灰?guī)r、鐵質(zhì)粉砂巖；東礦區(qū)II號礦體，礦體底板為基性火山巖、火山碎屑巖，礦體頂?shù)装宥鄶?shù)為火山熔巖及其碎屑巖。圍巖蝕變出現(xiàn)綠簾石化，綠泥石化，碳酸鹽化，絹云母化，硅化，黃鐵礦化，透閃石化(1∶20萬富蘊幅，1978)。喬夏哈拉礦床磁鐵礦的具體成礦環(huán)境可能為淺海陸棚上相對低洼的地段，在這種洼地中的海底水處于一種相對較靜止的堿性還原環(huán)境，這是磁鐵礦形成的必備條件①。成礦流體具有巖漿水加大氣降水的混合源特征(彭省臨等，1996)。凡出現(xiàn)綠簾石矽卡巖的地方，將有可能找到金銅礦體；碳酸鹽化帶亦為找金銅的標(biāo)志；強烈硅化則為找金礦的標(biāo)志(倪梁，2004)。這些重力異常高值區(qū)反映了本區(qū)地幔普遍上升的特點，局部高重力異常還與石炭紀、泥盆紀以中基性火山巖為主的復(fù)式背斜及隱伏基性巖體有關(guān)。這一特征為在該地段尋找新類型的礦體提供了較為有利的信息鄧吉牛，王軍升，廖啟林. 2000. 布爾根礦帶金銅找礦評價研究報告. 新疆305項目辦公室：內(nèi)部資料。喬夏哈拉式鐵銅金礦在華力西期構(gòu)造活動帶的島弧帶基性火山巖系中比較有利于成礦。FeCu174。 d34S of chalcopyrite ranged between
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