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在拉尔玛金铀矿床研究中鉴别出一种新的金矿控矿构造──热液隐爆机构。该机构在平面上呈近椭圆形,剖面上呈漏斗状,顶部为一由热液硅岩构成的“硅盖”,中心部位为热液隐爆角砾岩,其分布范围与金矿体吻合。热液隐爆机构的形成机制为:在硅岩与板岩的交界处形成的热液硅岩“盖”阻塞了热液系统,导致出现过压的地热环境,约49.5Ma时,由于东西向断裂复活,使脆性的硅岩发生破裂,最终导致了热液隐爆作用的发生。热液隐爆作用促使金元素从热液中沉淀,而热液隐爆机构则为金矿化提供了赋存空间。
In the study of the Lalmakan uranium deposit, a new gold ore-controlling structure-hydrothermal crypto-explosive mechanism was identified. The mechanism is nearly oval in plan, funnel-shaped in section, top is a “silicon cover” composed of hydrothermal silicon rock, and the center is hydrothermal crypto-explosive breccia, whose distribution area is consistent with gold ore body . The formation mechanism of hydrothermal implosion mechanism is that the “cover” of hydrothermal silicon formed at the junction of silicon and slate blocks the hydrothermal system, resulting in an overpressure of the geothermal environment at about 49.5 Ma, Resurrection to the fracture, rupture of brittle silicon rock, eventually led to the occurrence of hydrothermal cryptoexplosion. The role of hydrothermal cryptoexploration is to promote the precipitation of gold from hydrothermal fluids, while the hydrothermal crypto-explosive mechanism provides space for gold mineralization.