我国饰面用花岗岩成矿区带划分和成矿规律

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我国饰面用花岗岩矿资源丰富但分布不均,主要集中在内蒙古、新疆、山东、安徽、四川等5省(区).本文在前人研究基础上,总结了我国饰面用花岗岩矿地质特征,在充分考虑全国Ⅲ级成矿区带的基础上划分了16个成矿区带,并与之建立了对应关系.总结了饰面用花岗岩矿时空分布规律、赋矿岩体产出形态及岩相特征等,为我国饰面用花岗岩矿找矿提供了有益的借鉴.
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河北是国内饰面用花岗岩矿的重要产地之一,有太行山及燕山两大成矿带,已发现大中型矿床21处、小型矿床和矿化点70余处.通过对成矿地质背景、典型矿床、赋矿地质体及成矿构造的分析,将河北饰面用花岗岩矿床类型分为5类、15亚类,侵入岩型矿床类型有4类、11亚类,分布于以燕山期为主,晋宁期为次的酸性—超基性侵入岩中,受构造—侵入岩带控制;变质岩型矿床类型有1类、4亚类,形成于新太古代—古元古代混合岩化区域变质岩中.河北已形成冀中、冀北及冀东3大石材产业基地,石材品种达30余种,太行山中段的“中国黑”、冀北地区的“燕
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