在大别山碧溪岭石榴石橄榄岩的早期世代粗粒橄榄石中发现针状 (或杆状 )出溶体 ,长度为 5～ 30 μm ,宽度 2～ 6 μm ,沿橄榄石 [0 10 ]方位定向排列 .经综合方法鉴定研究结果表明 ,这种针状出溶体为含钛铬磁铁矿 ,是β相橄榄石中出溶体 ,它说明该超高压榴辉岩_超镁铁岩体形成的压力不只局限于柯石英_金刚石稳定场 (3～ 4GPa) ,有可能在大于 10GPa以上 (即 30 0km深度以下 )形 In the early generation of coarse olivine from the Bixi garnet peridotite in the Dabie Mountains, acicular (or rod-shaped) bodies were found with a length of 5-30 μm and a width of 2-6 μm, oriented along the direction of the olivine [0 10] According to the results of the comprehensive method, the results show that the acicular solution is a titaniferous chromium magnetite, which is the dissolution of β-phase olivine, indicating the formation pressure of the ultrahigh-pressure eclogite-ultramafic rock mass It is not only confined to the coesite-diamond stable field (3 ~ 4GPa), but it may be more than 10GPa (ie below 30km depth)