东天山二红洼岩体橄榄石成分对CuNi-VTiFe复合矿化的启示
发布时间：2018-07-15 11:53
【摘要】：对二红洼镁铁-超镁铁岩体Cu-Ni硫化物和Fe-Ti氧化物复合矿化的岩浆作用过程的研究有助于探讨CuNi-VTiFe复合成矿作用的机制.首先通过对两个侵入期次不同侵入相的橄榄石进行了系统的电子探针分析,其次,对岩浆作用过程的分异演化程度和硫化物熔离程度进行了模拟.研究表明,二红洼岩体的母岩浆在深部岩浆房过程中并未发生硫化物熔离作用,其中第一期岩浆作用演化程度较低,橄榄石Fo值为77.0~83.4,岩浆在运移或者就位过程中约占橄榄石1/140~1/25的硫化物熔离,造成该岩体Cu-Ni硫化物矿化;第二期岩浆作用是深部岩浆房高度分异演化的产物,橄榄石Fo值为61.1~66.7,高度的分异演化作用使Fe-Ti等成矿物质在残余岩浆中富集.两期不同演化程度的基性-超基性熔浆的先后侵位造成了二红洼岩体Cu-Ni硫化物和Fe-Ti氧化物的复合矿化.
[Abstract]:The magmatic process of Cu-Ni sulphide and Fe-Ti oxides complex mineralization in Erhongwa Magnesium-Fe ultramafic body is helpful to study the mechanism of CuNi-VTiFe composite mineralization. Firstly, the electron probe analysis of olivine in two different intrusive phases was carried out. Secondly, the differentiation and evolution of magmatism and the degree of sulfide melting were simulated. The results show that the parent magma of Erhongwa pluton did not occur sulfide melting in the deep magma chamber, and the first stage of magmatism evolution is relatively low. The Fo value of olivine is 77.0 ~ 83.4, and the sulphide melt of about 1 / 140 / 1 / 25 of olivine in the process of migration or emplacement of olivine results in Cu-Ni sulphide mineralization of the rock, and the second stage of magmatism is the product of the highly differentiated evolution of deep magma chambers. The F _ o value of olivine is 61.1 ~ 66.7.The highly differentiated evolution results in the enrichment of Fe-Ti and other ore-forming minerals in residual magma. The emplacement of basic-ultrabasic melts in two stages resulted in the complex mineralization of Cu-Ni sulphide and Fe-Ti oxides in Erhongwa rock mass.
【作者单位】： 中国地质大学地球科学与资源学院;北京矿产地质研究院;
【基金】：国家自然科学基金项目(No.41372102)
【分类号】：P587;P611
本文编号：2123983
[Abstract]:The magmatic process of Cu-Ni sulphide and Fe-Ti oxides complex mineralization in Erhongwa Magnesium-Fe ultramafic body is helpful to study the mechanism of CuNi-VTiFe composite mineralization. Firstly, the electron probe analysis of olivine in two different intrusive phases was carried out. Secondly, the differentiation and evolution of magmatism and the degree of sulfide melting were simulated. The results show that the parent magma of Erhongwa pluton did not occur sulfide melting in the deep magma chamber, and the first stage of magmatism evolution is relatively low. The Fo value of olivine is 77.0 ~ 83.4, and the sulphide melt of about 1 / 140 / 1 / 25 of olivine in the process of migration or emplacement of olivine results in Cu-Ni sulphide mineralization of the rock, and the second stage of magmatism is the product of the highly differentiated evolution of deep magma chambers. The F _ o value of olivine is 61.1 ~ 66.7.The highly differentiated evolution results in the enrichment of Fe-Ti and other ore-forming minerals in residual magma. The emplacement of basic-ultrabasic melts in two stages resulted in the complex mineralization of Cu-Ni sulphide and Fe-Ti oxides in Erhongwa rock mass.
【作者单位】： 中国地质大学地球科学与资源学院;北京矿产地质研究院;
【基金】：国家自然科学基金项目(No.41372102)
【分类号】：P587;P611
【相似文献】
相关期刊论文 前1条
1 王玉往;王京彬;王莉娟;龙灵利;唐萍芝;廖震;张会琼;;新疆北部CuNi-VTiFe复合型矿化镁铁-超镁铁岩体的判别标志[J];矿床地质;2010年S1期
，本文编号：2123983
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2123983.html
