To what extent do hydrothermal systems disturb the temperature field of the Molasse Basin?

热液系统在多大程度上扰乱了莫拉斯盆地的温度场？

• 批准号: 330306906
• 负责人: Professor Dr. Christoph von Hagke
• 金额: --
• 依托单位: Fachbereich Geographie und Geologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/330306906?language=en
• 关键词: what; extent; do; hydrothermal; systems

Low-temperature thermochronology is a key tool to quantify the burial and exhumation history of orogens and their foreland basins. However, current interpretations of thermochronological datasets in foreland basins may frequently be biased because thermal effects of groundwater flow are not taken into account. We propose to study the imprint of an active hydrothermal system on temperatures and thermochronometers in the northern foreland basin of the Alps, the Molasse Basin. We propose to quantify the influence of hydrothermal activity on the thermochronological signal by collecting high density low-temperature thermochronology data around a hydrothermal system that feeds two hot springs. Combining this new dataset with inverse thermal models will provide information on the age and duration of hydrothermal activity. The results will yield the first empirical test of the imprint of an active hydrothermal system on thermochronometers in a foreland basin. If a strong imprint is found, this implies that existing interpretations of thermochronometers in foreland basins that host hydrothermal activity may have to be revised. The results also have implications for geothermal energy; high temperature zones around hydrothermal systems form favorable targets for the exploration of geothermal energy, and thus their longevity must be better understood.

低温热年代学是定量研究造山带及其前陆盆地埋藏和折返历史的重要工具。然而，目前的解释热年代学数据在前陆盆地可能经常是有偏见的，因为没有考虑到地下水流的热效应。我们建议在阿尔卑斯山的北方前陆盆地，磨拉石盆地的温度和热年代学的一个活跃的热液系统的印记进行研究。我们建议通过收集高密度的低温热年代学数据，围绕一个热液系统，饲料两个温泉热活动的热年代学信号的影响进行量化。将这一新的数据集与逆热模型相结合，将提供关于热液活动的年龄和持续时间的信息。其结果将产生第一个经验测试的印记，一个活跃的热液系统的热年代计在前陆盆地。如果发现了一个强烈的印记，这意味着可能必须修改对热液活动所在的前陆盆地中的热年代计的现有解释。这些结果也对地热能有影响;热液系统周围的高温区形成了地热能勘探的有利目标，因此必须更好地了解它们的寿命。