辉钼矿的矿物学特征对铼资源的约束

Constraint of Mineralogical Characteristics of Molybdenite on Rhenium Resource

福建中生代钼矿分布广泛,并伴生有一定的铼。对坪地、上西坑、罗卜岭、马坑等四个典型钼矿的重点研究表明,成矿温度对辉钼矿中Re的形成起决性作用,中高温度下形成的辉钼矿结晶度高,颗粒大,多呈片状、板状,多型主要为2H型,多色性强,微量元素含量较低,Re含量较低;中低温度下的辉钼矿结晶度差,颗粒小,多呈细小鳞片状,多型主要为2H+3R型或3R,多色性弱,微量元素含量较高,Re含量也较高。部分钼矿中Re达伴生元素工业品位,矿石矿物成分、结构、构造相对单一,选矿工艺简单,Re具有一定的综合利用价值。

Mesozoic molybdenum deposits distributed widely in Fujian province,and associated with a certain amount of rhenium.Based on field systematic investigation and petrography,through studying the characterstics of ore petrology and mineralogy of molybdenite of typical molybnum deposits（Pingdi,Shangxikeng,Luobuling,Makeng,etc.） in Fujian Province,this paper obtain that straint of mineralogical characterstics of molybdenite on Re resource reflect in the action of temperature,the molybdenite formed under the medium-high temperature has a high degree of crystallinity,coarse grain,in sheet or plate,2H polymorph mainly,strong pleochroism,low content of trace elements and Re;the molybdenite formed under the low-medium temperature has a low degree of crystallinity,fine grain,in tiny scale,2H＋3R or 3R polymorph mainly,weak pleochroism,high content of trace elements and Re.As a kind of accompanying elements,Re is of some comprehensive utilization value.