金玉玕,王玥,Charles Henderson,Bruce R.Wardlaw,沈树忠,曹长群

• 1:现代古生物学和地层学国家重点实验室 中国科学院南京地质古生物研究所
• 2:现代古生物学和地层学国家重点实验室
• 3:中国科学院南京地质古生物研究所
• 4:卡尔加里大学地质与地球物理系

摘要(Abstract)：

二叠系乐平统长兴阶底界全球界线层型和点位(GSSP)确立在我国浙江长兴煤山D剖面长兴灰岩的下部、4a-2层之底,以牙形石演化序列Clarkina longicuspidata-C.wangi中C.wangi的首现为标志。该点位位于长兴组底界之上88cm处,与长兴期特征的■类化石Palaeofusulina sinensis和大巴山菊石类的首次出现层位一致。界线层的碳同位素存在明显的负漂移,正磁极性带出现在吴家坪晚期的反极性带之上。在煤山D剖面以西300m处的C剖面出露较多的龙潭组地层,清晰地反映出龙潭组—长兴组连续的沉积序列,被列为辅助层型剖面。

关键词(KeyWords)： 二叠系;乐平统;长兴阶;全球界线层型和点位(GSSP);年代地层;浙江;长兴

Abstract:

Keywords:

基金项目(Foundation): 中国科学院知识创新工程重要方向性项目(KZCX2-YW-122);; 国家自然科学基金(No.40621062);; 国家重点基础研究发展计划项目(2006CB806400)。

作者(Author): 金玉玕,王玥,Charles Henderson,Bruce R.Wardlaw,沈树忠,曹长群

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