| 党智财,李俊建,宋雪龙,赵泽霖,付超,唐文龙.内蒙古中部镁铁质-超镁铁质岩带铜镍硫化物矿床地质特征[J].地质找矿论丛,2014,29(3):329-335 |
| 内蒙古中部镁铁质-超镁铁质岩带铜镍硫化物矿床地质特征 |
| Geological features of a Cu-Ni (PGE) sulfide deposit-bearing mafic-ultramafic rock belt in the middle of Inner Mongolia |
| 投稿时间：2014-05-08 修订日期：2014-05-19 |
| DOI：10.6053/j.issn.1001-1412.2014.03.003 |
| 中文关键词: 镁铁质-超镁铁质岩 铜镍硫化物矿床 地质特征 成矿亚带 内蒙古中部 |
| 英文关键词:mafic-ultramafic rocks Cu-Ni (PGE) sulfide deposits geological features sub-ore belt central Inner Mongolia |
| 基金项目:由中国地质调查局地质调查项目（编号：1212010561510，1212011120330）、科技部公益性行业科研专项（编号：200811010）和国际科技合作项目（编号：2012DFB20220）资助。 |
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| 中文摘要: |
| 内蒙古中部出露1条近EW向的含铜镍镁铁质-超镁铁质岩带，宽约30 km，长约400 km。该岩带横跨2个构造单元：宝音图岩浆弧和狼山-白云鄂博台缘坳陷。文章按构造单元将其划分为2个成矿亚带：额布图-特颇格日图矿带和克布-小南山矿带。额布图-特颇格日图矿带构造单元为宝音图岩浆弧，主要形成以富镍为主、伴生Co元素的镍矿床（点），包括额布图、达布逊和特颇格日图；克布-小南山矿带构造单元为狼山-白云鄂博台缘坳陷，形成以富铜、镍为主，伴生Pt，Pd等铂族元素的铜-镍（PGE）矿床，包括克布、黄花滩和小南山。赋矿岩体呈似层状、透镜状、扁豆状及串珠状产出，矿石矿物以金属硫化物为主，含少量氧化物。区内不同构造单元内岩体形成2种不同类型矿床，其原因可能是古亚洲洋板块向华北板块北缘俯冲，岩石圈地幔发生部分熔融形成岩浆，在不同构造单元底侵上升，经过不同的介质及围岩，形成2种明显差异的成矿亚带。 |
| 英文摘要: |
| A mafic-ultramafic rock belt trending roughly EW is discontinuously exposed about 400 km long and 30 km wide in the middle of Inner Mongolia. It crosses two tectonic units. Baoyintu magmatic arc and Langshan- Bayan Obo marginal rift. The ore belt divided into Ebutu-Tepogeritu and Kebu-Ebutu sub-ore belts. The former is located in Baoyintu magmatic arc with Ni- dominated deposits and occurrences (including Ebutu, Dabuxun and Tepogeritu) accompanied by Co, the latter in Langshan-Bayan Obo marginal rift with Cu,Ni-dominated deposits and occurrences (including Kebu, Huanghuatan and Xiaonanshan) accompanied by PGE. The ore-bearing intrusions occur mainly as layeroid, lenticular and bead-like bodies. Metal sulfides are the main ore minerals, also a little metal oxides. The reason why the Cu-Ni deposits of the two sub-ore belts in the two tectonic units is varied may be the diapiric magma that was derived from partial melting of the lithosphere mantle during subduction of the ancient Asian ocean plate toward the North China plate and rose through different media or surrounding rocks in different tectonic units. |
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