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在本区正常海盆的表层沉积物中首次发现了微晶——细晶的自生石膏。细晶石膏0.5～2mm,呈单晶或双晶散布在S_2站位的砂、砾质沉积物中。石膏晶体中常包裹有细小的石英砂粒或岩屑。有的呈放射状晶簇选择性地附生于砾石表面或凹坑中;微晶石膏十几至几十微
For the first time, microcrystalline - fine grained gypsum was found in the surface sediments of the normal sea basin in this area. Fine crystal gypsum 0.5 ~ 2mm, was single crystal or double crystal dispersed in the S_2 station sand, gravel sediments. Gypsum crystals are often wrapped with fine quartz sand particles or cuttings. Some radial clusters selectively attached to the gravel surface or pit; microcrystalline gypsum a dozen to dozens of micro