Th-U-Pb age pattern in metamorphic monazites from the Variscan high pressure units in the Saxothuringian Zone (Saxony, NE-Bavaria)

萨克森州（萨克森州、东北巴伐利亚州）Variscan 高压单元变质独居石的 Th-U-Pb 年龄模式

• 批准号: 280870545
• 负责人: Professor Dr. Bernhard Schulz
• 金额: --
• 依托单位: Lehrstuhl für Geodynamik und Geomaterialforschung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/280870545?language=en
• 关键词: Th; Pb; age; pattern; metamorphic

The Allochthonous Domain of the Saxothuringian Zone is characterised by geological units with ultrahigh temperature, ultrahigh pressure, high pressure, medium pressure and low pressure metamorphism. The pressure-temperature (P-T)-paths of the units recorded a Carboniferous continental collision in the course of the Variscan orogeny. Th-U-Pb dating of monazite ((LREE, Th, U, Si, Ca)PO4) by electron microprobe allows to resolve several thermal events in metamorphic terrains. In this project, monazite and garnet in thin sections of micaschists and gneisses will be characterised by automated SEM-based methods. By the in situ analysis of monazite in microstructures, analysis of Y in garnet by LA-ICPMS and geothermobarometry, distinct segments of the P-T paths can be related to time sections (Petrochronology). Thermal events previous and posterior to a garnet crystallisation can be identified by the monazite age distribution pattern from several samples of a geological unit. In combination to the P-T paths, the monazite age distribution pattern allow the temporal-spatial reconstruction of the continent collision with nappe stacking and the transition to intense Carboniferous-Permian magmatism.

萨克森工业区的同种结构域的特征是地质单位具有超高温度，超高压力，高压，中压力和低压变质。单位的压力温度（P-T）Path在Variscan造山过程中记录了石炭纪的大陆碰撞。电子微探针的th-u-pb年代（（lree，th，t，u，si，ca）po4）允许在变质地形中解析几个热事件。在这个项目中，云母和片麻岩薄层中的独居石和石榴石的特征是基于SEM的方法。通过对微观结构中的独居石的原位分析，LA-ICPM和地球摩型体年度对石榴石中的Y分析，P-T路径的不同段可能与时间段（石化）有关。在地质单位的几个样本中，可以通过石榴石结晶的先前和后方的热事件来识别。结合使用P-T路径，独居的年龄分布模式允许在尿布堆积和向强烈的石炭纪 - 珀米亚人岩浆中过渡到大陆碰撞的时间空间重建。

项目成果

Polymetamorphism in garnet micaschists of the Saualpe Eclogite Unit (Eastern Alps, Austria), resolved by automated SEM methods and EMP–Th–U–Pb monazite dating

• DOI: 10.1111/jmg.12224
• 发表时间: 2017-02
• 期刊: Journal of Metamorphic Geology
• 影响因子: 3.4
• 作者: B. Schulz

Electron microprobe petrochronology of monazite-bearing garnet micaschists in the Oetztal-Stubai Complex (Alpeiner Valley, Stubai)

厄茨塔尔-斯图拜杂岩（Alpeiner Valley，斯图拜）中含独居石石榴石云母片岩的电子显微探针岩石年代学

• DOI: 10.1007/s00015-019-00351-4
• 发表时间: 2019
• 期刊: Swiss Journal of Geosciences
• 影响因子: 3.1
• 作者: Schulz;Krause;Zimmermann
• 通讯作者: Zimmermann

Geochronology of shear zones – A review

• DOI: 10.1016/j.earscirev.2018.07.007
• 发表时间: 2018-10
• 期刊: Earth-Science Reviews
• 影响因子: 12.1
• 作者: S. Oriolo;K. Wemmer;P. Oyhantçabal;H. Fossen;B. Schulz;S. Siegesmund

“Satellite monazites” in polymetamorphic basement rocks of the Alps: Their origin and petrological significance

• DOI: 10.2138/am-2016-5477
• 发表时间: 2016-05
• 期刊: American Mineralogist
• 影响因子: 3.1
• 作者: F. Finger;E. Krenn;B. Schulz;D. Harlov;D. Schiller

The timing of metamorphism in the Odenwald–Spessart basement, Mid-German Crystalline Zone

• DOI: 10.1007/s00531-016-1375-3
• 发表时间: 2017-07
• 期刊: International Journal of Earth Sciences
• 影响因子: 2.3
• 作者: T. Will;B. Schulz;E. Schmädicke