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河北省邯邢地区,出露于地表的中奥陶地层中,广泛分布着三层稳定的角砾状碳酸盐岩。自本世纪二十年代初至七十年代中期,一直被认为是同生角砾岩。1976年有人提出“后生”成因观点,但由于材料不完备,证据不充分,至今仍争论不休。本文主要以大量的岩类学证据,结合地层学、岩石学、矿物学和水文学的研究,从角砾状灰岩的产状、分布、自身特征;与深部膏盐层的关系;围岩次生变化;以及地下水特点四个方面,令人信服地证明了三层角砾岩是膏溶角砾状灰岩。在此基础上,进一步阐明了膏溶角砾状灰岩的形成机理。
Handan Xing area in Hebei Province, exposed in the surface of the Ordovician strata, widely distributed three stable brecciated carbonate rocks. From the early 1920s to the mid 1970s, it has been considered a symbiotic breccia. Some people raised the concept of “afterlife” in 1976, but they still argue endlessly because of incomplete materials and insufficient evidence. In this paper, a large number of rock-like evidence, combined with stratigraphy, petrology, mineralogy and hydrology research, from the occurrence of pebbly limestone, distribution, self-characteristics; relationship with the deep gypsum salt; Secondary changes and four aspects of groundwater characteristics proved convincingly that the three breccias are gypsum brecciated limestone. On this basis, further clarify the formation mechanism of gypsum-brecciated limestone.