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The interplay between hydrothermal mineralizations and element redistribution processes related to young tectonic activity - case studies from SW Germany

热液矿化与与年轻构造活动相关的元素重新分布过程之间的相互作用 - 德国西南部的案例研究

基本信息

批准号：
21645058
负责人：
Professor Dr. Gregor Markl
金额：
--
依托单位：
Arbeitsgruppe Petrologie und Mineralische Rohstoffe
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2006
资助国家：
德国
起止时间：
2005-12-31 至 2011-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/21645058?language=en
关键词：
interplay between hydrothermal mineralizations element

项目摘要

Crustal-scale fluid flow related to the extensional rift system of the Upper Rhine Graben, located in southwest Germany and France, has resulted in the formation of a number of very young hydrothermal mineralization styles. Complementary to hydrological and hydrochemical data and models available for active thermal spring systems, which characterize the recent state of rift-related fluid circulation, geochemical and isotopic studies of mineralizations provide an exciting window into the evolutionary history. Preliminary studies of barite-sulphide mineralization of the Wiesbaden thermal spring system point to a prolonged duration of hydrothermal activity on the order of at least 500 kyr. It has also been noted that post-Variscan hydrothermal fluorite-barite-calcite veins located on the shoulders of the Upper Rhine Graben show evidence of a pronounced remobilization, which can be related to very young tectonic and hydrothermal activity. It is proposed to expand the investigation to include different mineralized areas in the surroundings of the Upper Rhine Graben. The study will address the following objectives: (1) mineralogical and geochemical characterization of the young mineralization styles, (2) correlation of stable and radiogenic isotope trends with processes such as fluid mixing or fluid-rock interaction, (3) assessment of the relative role of fluid input and dispersion versus inheritance for element redistribution, (4) reconstruction of the physicochemical conditions prevalent during formation of the mineralization, and (5) development of a consistent geological-geochemical model of young hydrothermal activity.

与位于德国西南部和法国的莱茵河上游地堑的伸展裂谷系统相关的地壳流体流动导致了许多非常年轻的热液矿化样式的形成。活跃温泉系统的水文和水化学数据和模型描述了裂谷相关流体循环的最新状态，矿化的地球化学和同位素研究为了解演化历史提供了一个令人兴奋的窗口。对威斯巴登温泉系统的重晶石硫化物矿化的初步研究表明，热液活动的持续时间至少为 500 kyr。人们还注意到，位于莱茵河上游地堑肩部的后瓦里斯坎热液萤石-重晶石-方解石矿脉显示出明显的再活动证据，这可能与非常年轻的构造和热液活动有关。建议将调查范围扩大到莱茵河上游地堑周边的不同矿化区域。该研究将实现以下目标：（1）年轻矿化类型的矿物学和地球化学特征，（2）稳定和放射性同位素趋势与流体混合或流体-岩石相互作用等过程的相关性，（3）评估流体输入和分散与元素重新分布继承的相对作用，（4）重建期间普遍的物理化学条件矿化的形成，以及（5）建立一致的年轻热液活动地质地球化学模型。