Magnetic stratigraphy of the travertine-complex from Weimar-Ehringsdorf (Thüringen, Deutschland) - a terrestrial record of oxygen isotope stage 7

钙华杂岩Weimar-Ehringsdorf代表了氧同位素阶段7的独特陆地记录，时间间隔从180 ka到250 ka。利用TIMS铀系技术直接测年，可以建立一个独立的时间标尺。关于平均厚度约20米，必须假定平均沉积速率约为29厘米/年。最近对这一时期的古地磁研究证明，至少存在两个极性事件。在Biwa I或牙买加的文献中可以找到170至210ka的年龄，以及在210至260ka左右被称为普林格尔瀑布(年轻于218+/-10ka)、弗拉姆海峡(216-224ka)或卡拉布里亚海脊0(261+/-3ka)的稍早的极性事件。最近编制的SINT-800(过去800ka的合成强度记录)记录显示，在190ka处有一个明显的极小值，这是地球磁场(EMF)除了B/M反转之外最显著的特征。计划项目的主要目的是对钙华杂岩魏玛-埃林斯多夫进行古地磁研究，以证明其作为高分辨率电动势记录器的可行性。

The travertine-complex Weimar-Ehringsdorf represents a unique terrestrial record of oxygen isotope stage 7 covering the time interval from 180 to 250 ka. Direct dating by means of TIMS uranium series technique allows the contruction of an independent time scale. Regarding the average thickness of about 20 m an average sedimentation rate of about 29 cm/kyr has to be assumed. Recent paleomagnetic investigations of this period prove the existence of at least two polarity events. Ages of 170 to 210 ka can be found in the literature for the Biwa I or Jamaica and for a slightly older polarity event termed Pringle Falls (younger than 218 +/- 10 ka), Fram Strait (216 - 224 ka) or Calabrian Ridge 0 (261 +/- 3 ka) dated around 210 to 260 ka. The recently compiled SINT-800 (synthetic intensity record of the past 800 ka) record reveals a distinct minimum at 190 ka, the most pronounced feature of the Earth's magnetic field (EMF) apart from the B/M-reversal. The main aim of the planed project is a paleomagnetic investigation of the travertine-complex Weimar-Ehringsdorf to prove its suitability as a high resolution recorder of the EMF.