摘要
对广西珊瑚钨锡矿田的主要脉石矿物萤石进行形态、结构和物性特征等方面研究后认为:矿田内三种不同类型矿床的成矿温度从高温向低温递减,而成矿热液性质由酸性→中性→碱性演化;萤石中锶和稀土元素含量随温度下降而变贫;萤石的晶胞参数(a_0)除受温度影响外,还与其Sr和REE含量有关;萤石的物性变化是由于锶和稀土元素含量不同而引起的。
According to study mainly on the typomorphic characteristic offluorite——a major gangue mineral in morphology, structure and physicalproperty in the Shanhu W-Sn orefield, Guangxi, the several conclusions arefollows: With the drop of temperature of three ore deposits graduationallyfrom the high one toward the low one, the ore-forming solutions evolvedfrom acidity→neutrality→alkalinity; The contents of Sr and REE of fluoritebecame impoverished along with the drop of temperature; The Unit cells(a_0) of fluorite are related to the contents of Sr and REE in additionto temperature; The cliange in physical property of fluorite is due to thedifferent contents between Sr and REE of fluorite.
关键词
钨矿
锡矿
矿田
萤石
标型
fluorite
typomorphic characteristic
W deposit
Sn deposit
Guangxi
Shanhu
