新型规则混层的七埃绿泥石—膨胀绿泥石和绿泥石—叶蛇纹石的发现

Discovery of New Types of Regularly Interstratified Septechlorite-Swelling Chlorite and Chlorite-Antigorite in China

笔者在四川石棉县广元堡蛇纹岩中,发现一个以绿泥石、蛇纹石为主的晚期热液透镜体,长约一米,宽7—8厘米。从中采选了四种不同形态的绿色矿物,分别做了X光衍射(在各种条件下计100次分析),油浸法,化学分析,选区电子衍射,差热和红外吸收光谱等。

A late hydrothermal lens have been found by the authors in the serpenti-nite at Guanyuan-Bao arer,Asbestos County Sichuan Province.In the lens two types of regulaly interstratified septechlorite-swelling chlorite(Se-Cg)and chlorite-antigorite(C-An)have been identified.Both the Se-Cg and the C-An have a evident sharp reflection at about 32 A in the X-ray diffraction patterns.Behaviours and position of the d(001),d(002)reflection of both the regularly interstratifies minerals at 300℃,400℃,540℃,600℃,and 700℃ were analyzed and discussed in this paper.Properties of associated minerals;leuchtanbergite and septechlorite were reported in this paper,too.