湖北大冶冯家山、铜绿山地区的矿物晶体产出特征

Output Feature of Mineral Crystal from Fengjiashan and Tonglushan District, Daye, Hubei Province

  • 摘要: 矿物晶体收藏是观赏石收藏中的重要门类,其在国内受关注度逐渐提高,价格整体呈上涨趋势。影响矿物晶体价值的一个重要因素是产地,来自著名产地的具有附加价值。目前,我国缺少对矿物晶体产地特征的系统研究,对矿物晶体产地判别亦缺少理论支撑及可指导实践操作的辨识体系。位于湖北省大冶市的铜绿山、冯家山是重要的冶金腹地,主要出产铜、铁、金、硅灰石,也出产"湖北石"、红硅钙锰矿、鱼眼石、方解石、黄铁矿、水晶等优质矿物晶体,是湖北省最著名的矿物晶体产地。本文选取当地典型矿物晶体,从颜色、晶体形态、矿物共生组合等方面与其他代表性产地进行对比,总结了大冶典型矿物晶体的特征。"湖北石"目前仅产于大冶冯家山,呈深棕色至浅棕色,晶体微小,单晶呈三斜楔形,集合体常呈球状、花状晶簇,常与方解石、水晶共生。该产地另一典型矿物是红硅钙锰矿,其颜色为橙红色至红色,透明度较高,常呈球状晶簇或交织纤维状晶簇,常与"湖北石"、水晶、黄铁矿共生。冯家山鱼眼石晶体常呈板状,四方柱发育,光泽黯淡,颜色为灰暗的黄色或白色,常与水晶共生。铜绿山方解石常有赤铁矿及绿泥石包裹体,长波紫外下有强红色荧光,常呈复三方偏三角面体且可依(0001)形成接触双晶。通过产出特征判断产地是矿物晶体收藏和贸易中最实用的方法,本文的总结可以为著名产地矿晶收藏提供一定的参考信息。

     

    Abstract: Mineral crystal collection have approached to the scene view of peoples gradually. The price of mineral crystal increases alone with its popularity. Locality of mineral crystal is an important factor of its value. However, there is few systematic study of output features of mineral crystals and geographical classification system which can guide practical operation. Fengjiashan and Tonglushan district are metallurgical centers of Hubei Province which produce copper, iron, gold and grammite. Besides these industrial-used ore, they also produce collection-used mineral crystal like hubeite, inesite, apophylllite, quarts and calcite. This paper makes a contrast between samples from Fengjiashan and Tonglushan district and other typical origins, summarizes the crystal habit and mineral assemblages of mineral crystal from Fengjiashan and Tonglushan."Hubei stone" only yielded in Fengjiashan. It presents dark brown to faint brown colour and tiny triclinic wedge-shaped crystal. Its crystal druse shaped like flower or globe. "Hubei stone" commonly intergrow with calcite and quartz. Another typical mineral of this locality is inesite. Inesite from Fengjiashan presents orange-red or red colour and transparency. Single crystals always gather as global or fiber-shaped cluster. Apophylllite from Fengjiashan is usually faint yellow and poorly transparent. its crystal occurs generally as tetragonal prism tabular.There are commonly chlorite and hematite inclusion in calcite from Tonglushan. Calcite from this district always present strong red fluorescence in long wave UV light. This calcite can occurs contact twin.Origin recognition according to output features is the most practical way in the trade and collection and this paper can provide reference for Daye mineral crystal collection.

     

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