陕北斜坡店塔地区铬尖晶石特征

CHROMIUM SPINEL IN DIANTA AREA OF XIEPO,NORTHERN SHAANXI PROVINCE

前人已在鄂尔多斯盆地陕北斜坡圈出了铬尖晶石指示矿物的异常区和远景区,研究表明,区内店塔地区铬尖晶石具幔源特征,铬尖晶石表面具阶梯状小立方体结晶纹理结构,与国外含金刚石岩体中铬尖晶石表面特征具有相似性,表明店塔地区铬尖晶石可能与含金伯利岩岩体有关。

On the basis of the anomalous areas of indicator minerals for prospecting chromium spinel in the Northern Slope of Shaanxi in the Ordos Basin,which was delineated by previous geological work,further researches indicate that chromium spinel in the Dianta area has Mantle-derived characteristics,which is featured in small cubes on surface with a ladder crystal texture and the surface features of which are similar to those chromium spinels occurring in diamond-bearing rock mass in abroad.It demonstrates that the chromium spinel in the Dianta area may be related to kimberlite rock mass.