THE FELDSPARIZED TEXTURE OF POST—MONTMORILLONITE SATURATED WITH KCl—THE MARKS FOR THE DOWNWARD—EXCAVATING SEA WATER CURRENT IN HYDROTHERMAL CYCLIC SYSTEM
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摘要: 蒙脱石氯化钾饱和后,经压实或者加热,会出现长石化,钠蒙脱石向类钾长石转化、钙蒙脱石向斜长石转化。在沉积岩10μm级粘土中,其类钾长石是在海沟-海槽和地堑沉积体系中由钠蒙脱石在高压下成岩转化而成。类钾长石可以作为热液循环体系中海水潜入的地球动力特征标志。 本文发现了类钾长石的存在,在定向的X光衍射XRD图中,3.71A、4.23A和3.3A特征峰的比值为1:1:3.8,这种结构可能是按一定比例的,由类微斜钾长石与低石英组成的复合物,这种物质可能是文象花岗岩的先质。Abstract: After the montmorillonites saturated with KCl and experienced through compaction or heatings,feldsparizations would take place,bringing about the transformation of sodium-montmorillonites into iso-potassium feldspars and calcium-montmorillonites into plagio-clases.In the sedimentary rocks with 10μm clay,the iso-potassium feldspar is the product from the sodium-montmorillonites with high pressure in sedimentary system of trench-trough or graben,Therefore,the iso-potassium feldspar can be taken as the marks for the dynamic characters of downward-excavating sea water current in hydrothermal cyclic system.Based on existence of the iso-potassium feldspar,the ratio of the characteristic peak values of 3.71A,4.23A and 3.3A in the oriented X-ray deiffratogram(XRD)is about 1:1:3.8.Such a diffratogram texture may be fixed in a certain ratio and is probable to be the proecursor of graphic granites.
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[1] 罗瑞兰等.策脱石的成岩转化与油气的形成和初次运移,石油实验地质1985,7(4):257 [2] 卢书钾等.泥质沉积物压实作用和石油初次运移的棋拟研究,国际交流地质学术论文集(5),1985,209 [3] Dictrich等.岩石和造岩矿物(中译本),1979.110 [4] Hutchinaon.Presidental Adresa,Hvdrothermal Concepts,the old and the new.Economic Ceology 1983,1734 -
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