俄罗斯远东碱性-超基性杂岩体矿化作用

    MINERALIZATION OF ALKALI-ULTRABASIC COMPLEXES OF FAR EAST RUSSIA

    • 摘要: 碱性-超基性杂岩体主要分布于俄罗斯东部稳定地质构造中,并经历了中生代-新生代的构造-岩浆作用.这些杂岩体局限于长期活动的深断裂带中.一些岩体由多期岩浆岩组成,并逐渐形成岩浆源构造(为1500~1000Ma).在该构造中,于前寒武纪或古生代形成的超镁铁质核被新生代或中生代碱性岩、花岗岩类和二长岩所穿切.碱性-超镁铁质岩体具有完好的同心带状构造,由不含黄长石的钙-碱性至碱性岩组成(作为一种规律).碱性-超镁铁质火山岩和侵入岩由碱性苦橄岩、黄橄玄霞岩、金伯利岩和超基性似长岩、玄武角闪岩及霞岩组成.

       

      Abstract: Special features of geological structure,mineralization and genesis of the Russian Far Eastern alkali-ultrabasic complexes have been examined.Short description of exceptional recently discovered and formerly known deposits is given.In this formation group of complexes,deposits of rare and precious metals (zirconium,rare-earth elements,platinum metals,gold,etc.),precious and ornamental stones,titanium,phosphorus,phlogopite and vermiculite are shown.Original points of view at the genesis of these new genetic types of deposits are suggested.

       

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