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浙江仇山膨润土矿床地质特征及成因探讨 被引量:1

THE GEOLOGICAL CHARACTERISTICS AND ORIGIN OF THE CHOUSHAN BENTONITE DEPOSIT,ZHEJIANG PROVINCE
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摘要 本矿床赋存于晚侏罗世仇山火山断陷盆地中劳村期的火山碎屑流沉积相底部地层内,矿体呈层状,多层产出,具稳定的层位及明显的标志层。矿体围岩的蒙脱石化、硅化、滞石化、高岭石化等蚀变较普遍,尤其是顶板的硅化。矿石结构、构造反映了火山碎屑沉积的特点。矿石是自生的粘土矿物富集体,没有或很少有碎屑物质混杂。矿体厚度和品位变化系数较小,属厚度稳定型—较稳定型和质量均匀的矿体。根据仇山矿区的矿床地质特征,我们认为该矿床属于陆相火山沉积型。 The Choushan bentonite deposit hosts in the bottom bed of Laocun Epochpyroclastic flow sedimentary facies in later Jurassic Choushan volcanic faucted basin.The orebody is multi-layer occured,with persistent strata level and obviousindication bed.In the enclosing rocks,alterations such as montmorillization,silicification,zeolitization and kaolinization are popular,especially the silicificationin the roof rocks.The texture and structure of the ore reflect the characteristics ofpyroclastic sedimentation.The ore is the concentration of authigenic clay minerals,with little or small amount of detrital material.The ore bodies have less variation inthickness and grade,belonging to persistent to moderate persistent ore body tpye withuniform quality variation.By means of the above characteristics,it is supposed thatChoushan bentonite deposit should be continental volcanic-sedimentary ore deposit.
出处 《化工地质》 1993年第3期150-160,共11页
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  • 1巫全淮,陈鹤年,贺菊瑞,张耀夫,汤正义.浙江仇山膨润土矿床成因特征及成矿机理[J]中国地质科学院南京地质矿产研究所所刊,1985(04).

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