| 李科,王腾,方联华.津巴布韦太古宙克拉通金矿化年龄综述[J].地质找矿论丛,2016,31(4):607-615 |
| 津巴布韦太古宙克拉通金矿化年龄综述 |
| A Review on the timing of gold mineralization in the Zimbabwe Archaean Craton |
| 投稿时间：2015-11-13 |
| DOI：10.6053/j.issn.1001-1412.2016.04.020 |
| 中文关键词: 金矿化年龄 太古宙 克拉通 津巴布韦 |
| 英文关键词:timing of gold mineralization archaean eon craton Zimbabwe |
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| 中文摘要: |
| 文章通过系统梳理津巴布韦克拉通成矿年代学研究成果，结合野外观测工作、赋矿岩体间接年龄测定以及热液矿物的同位素年龄测定，总结了其区内典型地区如Harare-Shamva绿岩带、Midlands绿岩带、Mutare绿岩带及Limpopo活动带北缘的金矿化时限分布特征，提出主金矿化年龄分布范围为2 660 Ma-2 610 Ma，接近于新太古代地壳块体稳定克拉通化阶段末期，属同构造期或后构造期成矿；另一期矿化作用时限为2 420 Ma-2 380 Ma，与后克拉通化作用中大岩墙的侵位、区域性应力转换拉伸以及再活化作用引起的广泛的岩浆作用有关。两期矿化作用事件可与其它地区典型克拉通相类比。 |
| 英文摘要: |
| Combing metallogenic geochronological results of the Zimbabwe Craton, unequivocal field relationships, robust isotope systems constrain the timing of gold mineralization in major greenstone belts such as Harare-Shamva Belt, Midlands Belt, Mutare Belt and Northern Marginal Zone of the Limpopo Belt. The two phases of gold mineralization of 2 660 Ma-2 610 Ma and 2 420 Ma-2 380 Ma have been established. The former is syn-tectonic and approximate to end of stable cratonization of the Neoarchean crust and the latter related to the post-cratonization emplacement of the great dyke and extension resulted from regional stress transformation and wide-spread magmatism from reactivation. The phases can be correlated to those of typical cratons all over the world. |
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