山东大季家透闪石矿区赵家矿段矿床地质特征

Geological Characteristics of the Zhaojia Ore Block in the Dajijia Tremolite Mining Area, Shandong Province

矿区位于蓬莱市大季家镇,出露地层主要为古元古代粉子山群张格庄组三段,矿床赋存于张格庄组三段白色白云石大理岩中,含有三个矿体,矿体由透闪石、滑石组成,呈脉状、透镜状及不规则状产出。矿石的矿物成分主要为透闪石,矿石结构类型主要为纤状-针柱状变晶结构,矿石构造主要为块状构造。矿石主要化学成分为(%):SiO2 46.84、MgO 26.76、CaO 11.40、Al2O3 0.26、Fe2O3 0.22、LOI 12.77,提交透闪石矿资源量(333)170.85万t,矿床成因为镁质碳酸盐岩区域变质型透闪石矿床。

The mining area is located in the big Jijia town of Penglai city, the outcropping strata are mainly three sections of the Zhanggezhuang formation of the Palaeoproterozoic powder mountain group. The deposit occurs in the white dolomite marble of the three segment of the Zhanggezhuang formation and contains three orebodies. The ore body is composed of tremolite and talcum, which is produced in the form of pulse, lens and irregular shape. The mineral composition of ore is mainly tremolite, and its ore structure is mainly fibrous pin columnar crystal structure, and ore structure is mainly lump structure. The main chemical composition of the ore is SiO2 46.84%, MgO 26.76%, CaO 11.40%, Al2O3 0.26%, Fe2 O3 0.22%, LOI 12.77%, submitting the diopite resource(333) is 1708.5 thousand tons, and the deposit is a metamorphic tremolite deposit in the magnesia carbonate region.