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首页> 外文期刊>Physics of the Earth and Planetary Interiors: A Journal Devoted to Obsevational and Experimerntal Studies of the Chemistry and Physics of Planetary Interiors and Their Theoretical Interpretation >Geomagnetic field in the Near East at the beginning of the 6th millennium BC: Evidence for alternating weak and strong intensity variations
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Geomagnetic field in the Near East at the beginning of the 6th millennium BC: Evidence for alternating weak and strong intensity variations

机译：近东近东近东的地磁场：交替弱强和强度变化的证据

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摘要

This study presents new archeointensity results from the multilayered settlement Yarim Tepe I located today in Northern Iraq. Archeological evidences and new radiocarbon dates indicate that this site was occupied for about four centuries, between the end of the 7th and the beginning of the 6th millennium BC, leading to a 6.5 m-thick sequence of archeological deposits. A series of 16 groups of potsherds, with a total of 76 fragments, were collected from superimposed stratigraphic layers, with thicknesses of similar to 30 cm on average. Archeointensity measurements were carried out using the Triaxe procedure, which takes into account both anisotropy and cooling rate effects on thermoremanent magnetization acquisition. In this study, 114 specimens from 40 fragments have fulfilled our selection criteria and mean archeointensity results were derived from nine different groups of fragments, with a minimum of three fragments per group. According to an age model constructed using a bootstrap approach, the new archeomagnetic record spans a time interval of similar to 220 years between similar to 6070 BCE and similar to 5850 BCE. No significant intensity variations were observed during this time interval, with an overall mean intensity value of 42.0 +/- 1.6 mu T. A comparison of the Yarim Tepe I data with other archeointensity results spanning the 7th and 6th millennia BC previously obtained from the Near East, as well as from Eastern and Western Europe was conducted. The Yarim Tepe I results enabled to constrain the short duration, one century at most, of an intensity peak evidenced around 5750 BCE from the Bulgarian database. Intensity variation rates associated with the ascending branch of the peak reached values as high as similar to 0.12-0.15 mu T/year. Summarizing the geomagnetic field intensity variations in the Near East and Eastern Europe during the entire 6th millennium BC, it appears that they were likely characterized by the occurrence of two short-lasting intensi
机译：本研究提出了我在北伊拉克北部的多层解决Yarim TEPE的新古代思想结果。考古证据和新的Radiocarbones日期表明，本网站在第7届和第6届BC初期和第6届千年初期的考古沉积物序列之间占据了大约四个世纪。从叠加的地层层收集了一系列16组卵球洗手，总共76个碎片，平均水平厚度为30厘米。使用TriZiAxe程序进行了考古学测量，这考虑了热度磁化采集的各向异性和冷却速率影响。在本研究中，来自40片碎片的114个标本已经满足我们的选择标准，并且平均思考结果来自九个不同的片段，每组至少有三个片段。根据使用自举方法构建的年龄模型，新的古代磁性记录跨越与6070 BCE相似的220年的时间间隔，类似于5850 BCE。在此时间间隔内没有观察到显着的强度变化，总体平均强度值为42.0 +/- 1.6 mu t。yarim tepe i数据与其他古代思想结果的数据进行比较，跨越近期获得的第7族和第6毫升Bc的跨国公司东部，以及东欧的东部。 yarim tepe我的结果使得最多一个世纪最多的持续时间，强度峰值在保加利亚数据库中的5750年左右明确。与峰的上升分支相关联的强度变化率达到的值高，与0.12-0.15亩的值高。总结整个6千年千禧年近东欧洲近东和东欧的地磁场强度变化，似乎它们的特点是两种持久的羊西的发生

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