Age model and core-seismic integration for the Cenozoic Arctic Coring Expedition sediments from the Lomonosov Ridge
Age model and core-seismic integration for the Cenozoic Arctic Coring Expedition sediments from the Lomonosov Ridge
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DOI：
10.1029/2007pa001476
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发表时间：
2008-03-13
期刊：
影响因子：
--
通讯作者：
Heil, Chip
中科院分区：
文献类型：
--
作者：
Backman, Jan;Jakobsson, Martin;Heil, Chip
新生代生物地层，宇宙成因同位素，磁性地层，和旋回地层数据来自综合大洋钻探计划远征302，北极取心远征（ACEX），合并成一个连贯的年龄模型。这种年龄模型的分辨率低，因为穷人的核心恢复，有限的生物地层信息的可用性，和复杂的性质的磁性地层记录。一个2.2 Ma长的间断发生在中新世晚期;另一个跨度为26 Ma（18.2 - 44.4 Ma）。新生代沉积物的平均沉积速率约为15 m/Ma。岩芯-地震对比将ACEX沉积物与AWI-91090线的反射地震地层学联系起来，ACEX场地就在AWI-91090线上钻探。这种地震地层学可以在北冰洋中部广泛的地理区域进行相关，这意味着ACEX年龄模型可以扩展到钻井现场之外。
Cenozoic biostratigraphic, cosmogenic isotope, magnetostratigraphic, and cyclostratigraphic data derived from Integrated Ocean Drilling Program Expedition 302, the Arctic Coring Expedition (ACEX), are merged into a coherent age model. This age model has low resolution because of poor core recovery, limited availability of biostratigraphic information, and the complex nature of the magnetostratigraphic record. One 2.2 Ma long hiatus occurs in the late Miocene; another spans 26 Ma (18.2 - 44.4 Ma). The average sedimentation rate in the recovered Cenozoic sediments is about 15 m/Ma. Core-seismic correlation links the ACEX sediments to the reflection seismic stratigraphy of line AWI-91090, on which the ACEX sites were drilled. This seismostratigraphy can be correlated over wide geographic areas in the central Arctic Ocean, implying that the ACEX age model can be extended well beyond the drill sites.