川中东北部中—下侏罗统湖相碳酸盐岩碳氧同位素特征及其古环境意义

张葳¹, 李智武¹, 冯逢², 翟中华², 孙玮¹, 汤聪¹, 丁一¹, 刘树根¹

Carbon and oxygen isotopic composition of lacustrine carbonate rocks of the Lower-Middle Jurassic in NE part of central Sichuan Province and their palaeoenvironmental significance

Zhang Wei¹, Li Zhiwu¹, Feng Feng², Zhai Zhonghua², Sun Wei¹, Tang Cong¹, Ding Yi¹, Liu Shugen¹

川中东北部中—下侏罗统湖相沉积构造特征 A—泥粉砂介壳灰岩,3326.4 m,东岳庙段,平昌1井,单偏光;B—泥质介壳灰岩,低能介壳滩相沉积,3223.5 m,大一三亚段,平昌1井,单偏光;C—粉砂质介壳灰岩,3274.0 m,凉上段,龙浅103井,单偏光;D—介壳密集杂乱堆积,但介壳形态清晰可见,且以单瓣为主,破碎者少,为高能介壳滩相沉积,3521.4~3521.5 m,龙浅104x井;E—暗色泥页岩,水平层理发育,为半深湖相沉积,3274.1~3274.2 m, 平昌1井;F—虚线处为冲刷面,左为大安寨段半深湖相黑色泥岩,右为马鞍山段滨—浅湖相灰绿色泥岩,3266.2~3266.5 m,平昌1井