四川省新型钛矿(锐钛矿)找矿远景预测研究

Prognosis of Prospecting Potential of Anatase Deposit in Sichuan Province

雅安地区某钛矿勘探在宣威组底部发现钛矿层,矿床规模为大型,成因类型为古风化—沉积型的锐钛矿床,矿石质量较好。宣威组范围小,经研究在同时代层位的沙湾组、乐平组底部层位含矿性与岩性地质特征基本一致,并伴生镓,岩性为杂色—紫红色杂岩、泥岩、页岩。沙湾组、乐平组发现锐钛矿使四川省新型钛矿(锐钛矿)的找矿潜力大增。地质上一般采用“乐平统”代表整个晚二叠世的全部沉积;宣威组代表陆相沉积,沙湾组以湖沼相沉积为主,乐平组为海陆相交互相碎屑岩沉积,沙湾组、乐平组在四川境内分布较广,找矿潜力大,是寻找锐钛矿、镓矿的新发现的重要层位。

A large weathering-sedimentary anatase deposit associated with Ga is found in the bottom of the Upper Permian Xuanwei Formation in the Ya’an region.The anatase bed has also been found in the Shawan and Leping Formations correlated with the Xuanwei Formation.And the Shawan and Leping Formations are widely distributed over Sichuan.Accordingly,Sichuan has large potential for searching for anatase deposit.