翁泉沟硼铁矿床地质特征

翁泉沟硼铁矿床赋存于早元古宙辽河群里尔峪组。原岩为一套在裂谷环境下形成的中酸性火山岩及碳酸盐岩。矿体的容矿岩石是镁质大理岩。矿体厚度与容矿岩石厚度呈正相关关系。矿石矿物有硼镁石、硼镁铁矿、遂安石等,伴生矿物达64种。根据矿石所含的矿物种类,翁泉沟硼铁矿床矿石类型可分为磁铁矿型、硼镁石型、硼镁石—磁铁矿型、含硼镁铁矿—硼镁石—磁铁矿型等4种类型。硼镁铁矿是在火山喷气和深海沉积作用下形成的层控火山沉积变质矿床。

GEOLOGICAL CHARACTERS OF WENGQUANGOU BORON-IRON DEPOSIT

Wengquangou boron-iron deposit occurred within the rocks of Lieryu Formation in Liaohe Group, early Proterozoic. The primary rocks are a series of intermediate-acid volcanics and carbonate formed in environment of rift valley. Enclosing rocks of ore bodies are magnesian marble. The relation of thickness between ore bodies and enclosing rocks is positive correlation. The ore minerals are ascharites and suanite associated with other 64 types minerals. The types of ore can be divided into magnetite, ascharite, ascharite -magnetite and containing ludwigite aschartes-magnetite acoording to mineral types were contained in ore. The ludwigite deposit is a layerbound volcanogene sedimentary metamorphic deposit under the action of volcanogenic exhalation and abyssal sedimentary.