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高分辨率的测谱年代学解决了考古学意义重大Nariokotome tuffs,Turkana盆地中的层级复杂性

Saini Samim¹, Hayden Dalton¹, David Phillips¹

¹School of Geography, Earth and Atmospheric Sciences, Faculty of Science, The University of Melbourne, Parkville, Melbourne, VIC 3010, Australia.

Proceedings of the National Academy of Sciences of the United States of America

|September 15, 2025

概括

在Turkana盆地的Nariokotome Tuffs的精确约会使用先进的地球年代学和地球化学提炼了Homo erectus的时间表. 这项研究为关键古人类学遗址建立了一个强大的年龄框架.

科学领域:

古人类学古人类学.
地质时间学 (Geochronology)
地质化学地质化学

背景情况:

图尔卡纳盆地对于理解人类进化至关重要,因为它包含人类化石和文化技术.
该地区的火山岩对于测定Plio-Pleistocene序列的年代至关重要,包括与Homo erectus相关的序列.
之前,Nariokotome Tuff Complex的年龄限制是不确定的,因为数据重叠和化学成分相似.

研究的目的:

为Nariokotome Tuff Complex建立一个具有良好特征的地球化学和地球时间学框架.
解决土卡纳盆地的关键古人类学遗址的地平面复杂性和改进年龄分配.
使用先进的分析技术,区分上,中和下纳里奥科托姆塔夫.

主要方法:

高分辨率的阿贡-阿贡 (40Ar/39Ar) 地质年代学.
使用激光剥离感应合质谱法 (LA-ICP-MS) 进行粒度特异性的主要和微量元素地化学.
测时计相关性工具. 测时计相关性工具.

主要成果:

对于纳里科托马石,确定了不同的年龄:上方纳里科托马石在1,233.1 ± 1.9 ka,中部纳里科托马石在1,263.4 ± 1.9 ka,下方纳里科托马石在1,285.8 ± 2.1 ka.
高空间分辨率的微量元素组合为每个图夫单元提供了独特的地化学特征.
结合地质年代和地化学数据,成功地区分和关联了岩层.

结论:

这项研究为Nariokotome Tuff Complex提供了一个精细的时间框架,这对于理解Homo erectus进化至关重要.
综合方法克服了在图尔卡纳盆地约会和特征岩单元之前的局限性.
这些发现提高了在该地区准确地定年和关联关键古人类学沉积物的能力.

关键词:

纳里科托梅 (Nariokotome) 是一种的土豆.土尔卡纳盆地土尔卡纳盆地高精度的40Ar/39Ar地球时间学.人类类类型的人类类.测字时间学测字时间学 Tephrochronology

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