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1989年6月,国家地材局地质公司河北地质勘探大队在河北省东部地区中元古代地层中发现了沉积型海泡石粘土矿,并立即开展了地质找矿工作。经初步调查,可将海泡石粘土含矿岩系分为四个岩性段,第二、三、四岩性段均有产出,其中第三岩性段内的两个粘土层层位稳定,厚数米,且分布范围大。海泡石粘土或含海泡石粘土呈灰白～白色,块状,有的略显片理;经X射线衍射和化学分析等测试证实,其矿物组成中粘土矿物主要是海泡石、蒙皂
In June 1989, the Geological Exploration Brigade of Hebei Bureau of Geology and Mineral Resources of National Bureau of Geological Prospecting Bureau found sedimentary sepiolite clay mine in the Mesoproterozoic strata in the eastern part of Hebei Province and carried out geological prospecting work immediately. After preliminary investigation, the sepiolite clay ore-bearing rocks can be divided into four lithologies, with the second, third and fourth lithologies being produced. The two clay layers in the third lithology Stable, thick meters, and the distribution of large. Sepiolite clay or sepiolite-containing clays are gray-white, lumpy, and some slightly cleaved; X-ray diffraction and chemical analysis test confirmed that the mineral composition of clay minerals are mainly sepiolite,