云南建水县普雄地区三叠纪岩石地层与沉积环境

THE TRIASSIC LITHOLOGIC STRATIGRAPHY AND SEDIMENTARY ENVIRONMENT IN PUXIONG AREA OF JIANSHUI,YUNNAN

云南建水县普雄地区三叠系划分为洗马塘组(T_1x)、嘉陵江组(Tj)、个旧组(T_2g)和法郎组(Tf)。其中洗马塘组(T_1x)主要为红色陆源碎屑沉积,形成于滨海陆屑滩环境;嘉陵江组(Tj)主要为灰色泥质碳酸盐沉积,形成于开阔台地-台地边缘环境;个旧组分为三个段,下段(T_2g^1)为灰色夹钙质的镁质碳酸盐沉积,形成于局限台地(主)、开阔台地;个旧组中段(T_2g^2)为灰色镁质碳酸盐沉积,形成于局限台地;上段(T_2g^3)为灰色钙质碳酸盐沉积,形成于台地边缘相区;法郎组(Tf)黄绿色含碳酸盐的陆源细碎屑沉积,形成于浅海陆棚环境。

Triassic in Puxiong area of Jianshui,Yunnan can be divided into Ximatang Formation（ T1x）,Jialingjiang Formation（ Tj）,Gejiu Formation（ T2g） and Falang Formation（ Tf）. Ximatang Formation（ T1x） is mainly the red terrigenous clastic deposit,formed in the littoral terrestrial clastic beach; Jialingjiang Formation is mainly the grey argillaceous carbonate sediment,formed on the wide platform-platform margin; Gejiu Formation can be divided into 3 Members： Lower Member（ T2g^1） grey Mg carbonate sediment with Ca intercalation,formed on limited platform（ mainly）,wide platform; Middle Member（ T2g^2） grey Mg carbonate sediment,formed on limited platform; Upper Member（ T2g^3） grey Ca carbonate sediment,formed on platform margin facies area;Falang Formation（ Tf） yellow-green carbonate-bearing terrestrial fine clastic sediment,formed in the neritic shelf environment.