论缝合线构造的地质意义

原生缝合线构造的地质意义,在于它可作为了解古地理环境的标志;在进行地层对比时可作为岩相侧变的证据;某些层间缝合线可作为划分地层沉积韵律的界线;在地质调查中,可作为判别层面的标志和用来鉴定岩层的顶和底。次生缝合线的地质意义,在于它可作为分析区域构造应力及区域构造的依据。压溶作用在形成缝合线构造的同时,岩石体积缩小,结构紧密以及缝合线内有不溶物质存在,因此原生缝合线构造不利于石油、天然气和地下水的迁移和储积。只有次生缝合线中的微缝合线才有可能成为石油、天然气和地下水的储积场所。

THE GEOLOGICAL SIGNIFICANCE ON STYLOLITE

The geological significance of the origional slylolite is marks of palaeogeographic environment, the evidence of the side change of lithofacies, the boundary dividing the sedimentary rhythm for some stylolites between strata, the mark of judging bedding plane during geological surveying and is used to determine the top and bottom of strata. The geological significance of substylolite is the evidence of analysing regional structure stress and regional structure. The origional stylolite did not contribute to moving and saving oil, natural gas and underground water.While stylolite formed under the action of pressure solution, the rock volumes became smaller and closer, furthermore, there were dissolved matters inside stylolite. So only the mini-stylolite in the substylolite can become the place for saving oil,natural gas and underground water.