| 豫西、北地区“三山子灰岩”时代归属及成因意义 |
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| 引用本文： | 刘印环. 1987. 豫西、北地区“三山子灰岩”时代归属及成因意义. 地质通报,(3): 242-247. |
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| 作者姓名： | 刘印环 |
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| 作者单位： | 河南省地矿局区调队 |
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| 摘 要： | 本文介绍了“三山子灰岩”的沉积厚度变化极大,在河南西部鲁山县辛集一带最薄仅28m,而到北部的渑池县厚度达360m。形成时代亦因地而异,最早开始于中寒武世张夏期,最晚止于早奥陶世亮甲山期。因此,认为“三山子灰岩”实际是一个倾斜和穿时的岩石地层单位。
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AGE ASSIGNMENT OF THE "SANSHANZI LIMESTONE" IN WESTERN AND NORTHERN HENAN AND ITS GENETIC IMPLICATIONS |
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| LIU Yin-huan. 1987. AGE ASSIGNMENT OF THE "SANSHANZI LIMESTONE" IN WESTERN AND NORTHERN HENAN AND ITS GENETIC IMPLICATIONS. Geological Bulletin of China,(3): 242-247. |
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| Authors: | LIU Yin-huan |
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| Abstract: | The "Sanshanzi limestone" is widely distributed in northern and western Henan. Its thickness is highly variable: it is the thinnest in Xinji,Lushan county,being only 28 m in thickness,while it is the thickest to the north in Rencun,Mianchi county,being 360 m thick. It is a complex geological body of dolomite. Its age varies from place to place,from the early Changxiaian age of the Middle Cambrian to the late Liangjiashanian age of the Early Ordovician. As a diachronous lithostratigraphic unit,it is an inclining mass of sedimentary rocks that formed in the process of marine regression during the Late Cambrian to Early Ordovician. |
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