摘要
湖北随州薛家店地区灯影组去白云石化特征及意义翟永红郭成贤（江汉石油学院，湖北荆沙４３４１０２）关键词去白云石化方解石储层灯影组湖北随州去白云石化是一种白云石被方解石交代的成岩现象。目前，国内外有关文献报道，但多侧重于实验室研究机理和条件的研究，如Ｄｅ...
Dedolomitization studied in this area occurs in outcrop as light gray bedded, mottled or massive fine mediam crystalline dolomitic limestone, accompanying with secondary vugs and paleokarst cave.The dedolomitized calcite had the below characteristics: a) anhedral with clean surface and residual precursor dolomite crystals;b)no luminescence under cathode ray;c) δ 13 C for -1.03‰～+2.6‰,δ 18 O for -12.7‰～-13.09‰,Na +96.5×10 -6 (average) and Sr 2+ 125.3×10 -6 (average).Combining with the regional structural and diagenetic evolution,it was concluded that the dedolomitization was formed by the influx of 13 C and 18 O depleted but high Ca 2+ /Mg 2+ meteoric water under the controlling of the fault associated fractures. Dissolution accompanying with the dedolomitazation improved the reservoir quality of previous rocks.
出处
《矿物岩石地球化学通报》
CAS
CSCD
1997年第4期17-21,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家"八五"攻关项目
关键词
去白云石化
方解石
储层
灯影组
湖北随州
dedolomitization
calcite
reservoir
Dengying Formation
Xuejiadian,Suizhou, Hubei Province
