上奥陶统五峰组海底麻坑沉积的首次识别及其地质意义*
时志强1,2, 彭深远1, 赵子腾1

First identification and its geological significance of seafloor pockmarks sediments in the Upper Ordovician Wufeng Formation in China
SHI Zhiqiang1,2, PENG Shenyuan1, ZHAO Ziteng1
重庆石柱柑子坪(A)及歇步头(B-F)剖面麻坑沉积扫描电镜特征 A—孔隙中见石英晶体(红色箭头所指)沉淀于孔隙内壁; B—石英晶体(红色箭头所指)沿裂缝沉淀; C—岩石中重晶石(蓝色箭头所指)普遍发育; D—石英与重晶石普遍发育,在重晶石晶簇中见石英晶体的印模(蓝色箭头所指);E—岩石中见重晶石(蓝色箭头所指)及低温α石英双晶(红色箭头所指);F—沥青(黄色箭头所指)沿裂缝发育。A-F均为背散射图像,矿物及沥青经能谱确认