小秦岭某地硷性火山岩型稀有、稀土矿化特征及资源潜力

MINERALIZATION CHARACTERISTICS,RESOURCE POTENTIAL AND PROSPECTING SIGNIFICANCE OF RARE AND RARE EARTH MINERALS IN ALKALINE VOLCANIC ROCKS IN SMALL QINLING MOUNTAINS

对正长斑岩、粗面岩碱性火山岩的产出环境、规模和主要岩石特征,以及岩石中的稀有、稀土含矿性作了叙述。依据化探异常和少量化学样分析结果预测碱性火山岩中潜在资源量为:(Ta、Nb)_20_5为7万吨,稀土15万吨,含钾长岩石1.27亿吨。认为对该碱性火山岩稀有、稀土矿的评价对小秦岭地区大范围分布的同类岩体找矿具有指导意义。

This paper briefly introduced the occurrence environment and size of dominant rocks including syenite porphyry and trachyte alkaline volcano rocks,in which rare and rare earth minerals occurring in rocks are also discussed.Based on geochemical anomalies and a small amount of chemical analysis results,the potential resources of alkaline volcanic rocks are predicted as follows：70,000 tons of（Ta and Nb）205,150,000 tons of rare earth minerals and 127 million tons of potash rocks.The evaluation of rare and rare earth minerals in the alkaline volcanic rocks is of guiding significance for ore prospecting in the similar rock mass that has a wide distribution range in the small Qinling Mountains area.