扬子克拉通北缘神农架南华系莲沱组寒冷气候的沉积学证据:冻融构造*
王玉冲1,2, 旷红伟2, 彭楠2, 柳永清2, 范正秀2, 夏晓旭1,2, 陈骁帅2, 郑行海1,2, 孙宇翔3

Freezing and thawing structures: An evidence of cold climate in the Neoproterozoic Liantuo Formation in Shennongjia of northern margin of Yangtze Craton
Wang Yu-Chong1,2, Kuang Hong-Wei2, Peng Nan2, Liu Yong-Qing2, Fan Zheng-Xiu2, Xia Xiao-Xu1,2, Chen Xiao-Shuai2, Zheng Hang-Hai1,2, Sun Yu-Xiang3
神农架莲沱组脉体的显微结构图 a—脉体内含大粒径石英砂,脉体与基质接触部位,细粒的长石、石英颗粒为主,正交偏光;b—脉体边缘的颗粒具定向性排列,与围岩基质内杂乱的石英颗粒形成对比,单偏光;c—脉体与基质接触部位界线清晰,突变接触,单偏光;d—围岩基质为富铁质的凝灰质砂岩,杂基支撑,杂基相对富集铁质,单偏光