本文選題：三礦溝　切入點(diǎn)：Cu-Fe-Mo礦床　出處：《中國地質(zhì)》2016年06期 　論文類型：期刊論文

【摘要】：三礦溝Cu-Fe-Mo礦床是大興安嶺地區(qū)三礦溝—多寶山構(gòu)造-成礦帶中一個(gè)比較典型的矽卡巖型礦床。在大量野外地質(zhì)調(diào)查、室內(nèi)巖礦鑒定的基礎(chǔ)上,對(duì)與成礦有關(guān)的三礦溝復(fù)式英云(花崗)閃長巖體的巖石地球化學(xué)特征進(jìn)行了分析,探討了該巖體的成因類型和構(gòu)造環(huán)境。研究表明,該礦床巖漿巖體屬于鈣堿性I型花崗巖,具有大陸地殼的特征,形成于與造山花崗巖有關(guān)的火山弧環(huán)境或相似的構(gòu)造環(huán)境中,主要與造山階段的火山弧花崗巖關(guān)系密切。稀土元素配分圖顯示向右緩傾斜的輕稀土元素富集型特點(diǎn),輕、重稀土分餾較為明顯,無明顯的負(fù)銪異常,暗示其具有相同或相近的成因,也反映了同源巖漿的特點(diǎn)。δEu值介于0.81~1.24,δCe值為1.00~1.13,表明巖漿演化過程中發(fā)生了微弱的分離結(jié)晶作用,同時(shí)又受到同化混染作用的一定影響,其成巖環(huán)境氧逸度較低,指示了缺氧環(huán)境,有利于金屬元素的積聚而形成礦床。
[Abstract]:The Sankuangou Cu-Fe-Mo deposit is a typical skarn type deposit in the Sankuang-Dobaoshan tectonic-metallogenic belt in Daxinganling area. The petrogeochemical characteristics of the Sankuangou compound Yingyun (granodiorite) diorite are analyzed, and the genetic types and tectonic environment of the intrusive body are discussed. The study shows that the magmatic body of the deposit belongs to calc-alkaline I-type granite. Having the characteristics of the continental crust formed in a volcanic arc environment or similar tectonic environment associated with orogenic granites. It is mainly related to volcanic arc granites in orogenic stage. The REE distribution diagram shows that the enrichment type of LREE is slightly inclined to the right, the fractionation of LREE is obvious, and there is no obvious negative europium anomaly. It suggests that it has the same or similar origin, and also reflects the characteristics of the homologous magma. The 未 EU value is between 0.81 and 1.24, and the 未 ce value is 1.001.13, which indicates that the magmatic evolution has a weak separation and crystallization process and is also influenced by assimilation and staining. The oxygen fugacity of diagenetic environment is low, which indicates anoxic environment and is favorable to the accumulation of metal elements.
【作者單位】： 黑龍江省礦業(yè)集團(tuán)有限責(zé)任公司;黑龍江省地質(zhì)調(diào)查研究總院齊齊哈爾分院;
【基金】：全國危機(jī)礦山找礦項(xiàng)目(200623016)資助~~
【分類號(hào)】：P618.2;P588.1
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本文編號(hào)：1560885