鄂西黄陵背斜周缘震旦系灯影组白云岩成因分析

李浩涵, 张聪, 李文正, 张春贺, 张远, 王梓, 陈维堃, 方镕慧

Genetic analysis of dolomites in the Sinian Dengying Formation on the periphery of the Huangling anticline, western Hubei Province

LI Hao-Han, ZHANG Cong, LI Wen-Zheng, ZHANG Chun-He, ZHANG Yuan, WANG Zi, CHEN Wei-Kun, FANG Rong-Hui

图8 黄陵背斜周缘震旦系灯影组白云岩成因模式 a—震旦纪末期灯影组强烈蒸发条件下的高盐海水环境下,白云石迅速结晶生成低有序度的泥晶白云石;b—侏罗纪末期灯影组埋深达到最大,白云石经过深埋改造、重结晶作用形成高有序度的粉晶白云岩;c—抬升过程中灯影组出露地表,接受改造作用

Fig.8 Genetic model of dolomite in the Sinian Dengying Formation on the periphery of Huangling anticline a—under the environment of high-salinity seawater under intense evaporation conditions during the Sinian Dengying Stage, dolomite rapidly crystallized to form micritic dolomite with a low degree of order;b—at the end of the Jurassic, the burial depth of the Dengying Formation reached its maximum, the dolomite underwent deep burial transformation and recrystallization to form silt-crystalline dolomite with a high degree of order;c—during the uplifting process, the Dengying Formation was exposed on the earth's surface and underwent transformation