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A detrital apatite fission-track study of the CIROS-2 sedimentary record: Tracing ice pathways in the Ross Sea area over the last 5 Ma

机译:CIROS-2沉积记录的滴注磷灰石裂变轨道研究:在过去5 mA的罗斯海域追踪冰途径

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The Ross Sea is a crucial area to investigate pathways of ice during the Cenozoic as it records the evolution of both the East and West Antarctic Ice Sheets. This work is based on detrital apatite fission track (AFT) data extracted from the sedimentary record of well CIROS-2, which spans the last 5 Ma. The AFT data show a large range of ages, and most of the grains fit well with two main components that fall between 24 and 42 Ma and between 43 and 70 Ma, whereas the other components are not regularly distributed through the well, thus indicating a mixture of provenance from different areas along the Transantarctic Mountains. As a whole, our work suggests glacial expansion over the McMurdo Sound during the Pliocene, and ice periodically invading and retreating in Pleistocene.
机译:Ross Sea是在新生代期间调查冰通路的关键区域,因为它记录了东部和西南南极冰盖的演变。 这项工作是基于从井CiROS-2的沉积记录中提取的拆卸磷灰石裂变轨道(AFT)数据,该数据跨越最后5 mA。 AFT数据显示出大量的年龄,大部分晶粒均匀,两个主要成分均匀,其落在24到42 mA之间,而43到70 mA之间,而其他部件不经常分布在井之间,从而指示一个 来自Transantarctic山脉不同区域的物质混合。 总的来说,我们的工作表明,在全世界期间,在McMurdo声音上冰川扩张,并定期入侵更新世的冰。

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