【摘要】 在我国湖盆中燧石是一种非常罕见的岩石类型，到目前为止，国内尚没有人对湖相地层中的燧石作专门研究报道。本文首次提出在辽河西部凹陷下第三系湖相地层中存在着纹层状燧石，并从地质背景条件、沉积和地球化学特征入手，对其成因机制作了初步的探讨。更多还原

【Abstract】 Abstract In the lake basins of China, the chert is a very rare rock type. So far, there are not special studies and reports on chens in lacustrine strata at home. In this paper, it is first advanced that laminated chens exist in the Paleogene lacustrine strata of west Liaohe Depression. And based on geologic setting conditions and sedimentary and geochemical characteristics, their genetic mechanism is approached preliminarily.更多还原