38. SUMMARY OF CRETACEOUS/TERTIARY BOUNDARY STUDIES, DEEP SEA DRILLING PROJECT SITE 577, SHATSKY RISE1
38. SUMMARY OF CRETACEOUS/TERTIARY BOUNDARY STUDIES, DEEP SEA DRILLING PROJECT SITE 577, SHATSKY RISE1
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38. 白垩纪/第三纪边界研究摘要，深海钻探项目 577 号地点，夏茨基海隆 1
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
J. Zachos
中科院分区：
文献类型：
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作者：
A. Wright;U. Bleil;S. Monechi;H. Michel;N. Shackleton;B. Simoneit;J. Zachos
在Shatsky隆起的Deep Sea Drilling Project Site 577（32°26.51'N, 157°43.40'E）的三个钻孔中，恢复了连续的、扩展的、未受干扰的白垩纪/第三纪边界序列。白垩纪/第三纪界线位于约109.6米深的白色钙质软泥中。利用纳米化石在磁性C-29R亚时区内进行了生物地层鉴定，其特征是铱异常为61 ng/cm2, 13C急剧下降1%。有限的有机地球化学样品表明，分子地层学不能明确地应用于边界。
Continuous, expanded, and undisturbed Cretaceous/Tertiary boundary sequences were recovered in three holes drilled at Deep Sea Drilling Project Site 577 (32°26.51'N, 157°43.40'E) on Shatsky Rise. The Cretaceous/Tertiary boundary lies at a sub-bottom depth of approximately 109.6 m in a white calcareous ooze. It was identified biostratigraphically within the magnetic C-29R subchron using nannofossils and is characterized by an iridium anomaly of 61 ng/cm2 and a sharp 1% decrease in 13C. Limited organic geochemical samples suggest that molecular stratigraphy cannot be applied definitively across the boundary.