CAJ | 학술논문

以塔木察格盆地火山碎屑岩(流纹质凝灰岩、沉凝灰岩)为研究对象,通过密闭容器中地层水—火山碎屑岩相互作用的水热实验,研究了不同温度下碱性地层水对火山碎屑岩成分的改造.研究显示:在碱性地层水作用下,火山碎屑岩以石英溶解为主,且随着温度的升高,石英的溶解度逐渐加大,而长石及碳酸盐矿物的溶蚀较弱;同时,通过扫描电镜(SEM)的观察发现:流纹质凝灰岩在100,120,140,160℃下样品表面有钙十字沸石生成;沉凝灰岩在100℃时有方解石生成,在120℃和180℃时样品表面有钙十字沸石生成.结合南贝尔凹陷石英保存完好,长石、碳酸盐矿物溶蚀溶解较强的特征,表明碱性流体对该区火山碎屑岩次生孔隙贡献较少.
이탑목찰격분지화산쇄설암(류문질응회암、침응회암)위연구대상,통과밀폐용기중지층수—화산쇄설암상호작용적수열실험,연구료불동온도하감성지층수대화산쇄설암성분적개조.연구현시:재감성지층수작용하,화산쇄설암이석영용해위주,차수착온도적승고,석영적용해도축점가대,이장석급탄산염광물적용식교약;동시,통과소묘전경(SEM)적관찰발현:류문질응회암재100,120,140,160℃하양품표면유개십자비석생성;침응회암재100℃시유방해석생성,재120℃화180℃시양품표면유개십자비석생성.결합남패이요함석영보존완호,장석、탄산염광물용식용해교강적특정,표명감성류체대해구화산쇄설암차생공극공헌교소.
@@@@The hydrothermal experiments of volcanic clastic rocks chosen from the Nanbeier Sag of the Tamtsag Basin and formation water were researched under different temperatures in a closed container. The results show that quartz can be dissolved by alkaline formation water and the dissolution intensity will be enhanced with the in-creasing of temperature; on the contrary,the dissolution degree of feldspar and calcite is very low. Meanwhile, by scanning electronic microscope (SEM), phillipsite is found on the surface of rhyolitic tuff sample (at the tem-perature of 100,120,140 and 160 ℃) and sedimentary tuff sample (at the temperature of 120 and 180 ℃); cal-cite is found on the surface of sedimentary tuff at 100 ℃. Considering the good preservation of quartz and strong dissolution of feldspar and carbonate, it is proved that the formation water contributes few to the secondary poro-sity of the Nanbeier Sag of the Tamtsag Basin.