南流江三角洲地区自生矿物——铁代皂石的特征

ON AUTHIGENIC Fe-SUBSTITUTED SAPONITE IN DELTA AREA OF THE NANLIUJIANG RIVER,GUANGXI

孙和平 李从先 C.D.柯蒂斯

Sun Heping Li Congxian C.D. Curtis

在广西南流江三角洲的研究中,发现大量貌似海绿石的墨绿色矿物颗粒。经分析表明,它们既不是海绿石,也不是绿脱石,而是铁代皂石。

In the study of the Nanliujiang river delta,Beibu Gulf,abundant greenish dark mineral that looks like glauconite has been found.X-ray powder diffra-ctograms show strong reflections at 15.3Å and at 1.53/1.54Å.These suggest smectite.There are no reflections in the 10Å region(8.85°2θ)which would be expected for glauconite.The KO content(1.5%±)is also much lower than would be anticipated(7-9%).The result of formula calculation from electron microprobe analysis is very satisfactory for a trioctahedral,Fe-substituted saponite.Its distribution and formation environment have also been discussed.

10.11743/ogg19850204