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

Weimar-Ehringsdorf钙华杂岩代表了一个独特的氧同位素第7阶段的陆地记录，时间跨度为180 - 250 ka。利用TIMS铀系列技术直接定年可以建立一个独立的时间尺度。对于约20米的平均厚度，必须假定平均沉降速率约为29厘米/年。最近对这一时期的古地磁研究证明至少存在两次极性事件。在文献中可以找到Biwa I或Jamaica的170 - 210 ka的年龄，以及一个稍早的极性事件，称为Pringle Falls（小于218 +/- 10 ka）， Fram Strait （216 - 224 ka）或Calabrian Ridge 0 (261 +/- 3 ka)，时间约为210 - 260 ka。最近编制的SINT-800（过去800 ka的合成强度记录）记录显示，在190 ka有一个明显的最小值，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魏玛-埃林斯多夫钙华复合体进行古地磁调查，以证明其作为EMF高分辨率记录仪的适用性。

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.