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.

低温热年代学是量化造山带及其前陆盆地埋藏和折返历史的关键工具。然而，目前对前陆盆地热年代学数据集的解释可能经常存在偏差，因为没有考虑地下水流的热效应。我们建议研究活跃热液系统对阿尔卑斯山北部前陆盆地（莫拉斯盆地）温度和测温计的影响。我们建议通过收集供应两个温泉的热液系统周围的高密度低温热年代学数据来量化热液活动对热年代学信号的影响。将这个新数据集与反热模型相结合将提供有关热液活动的年龄和持续时间的信息。研究结果将首次对前陆盆地热液系统在测温仪上的印记进行实证测试。如果发现了强烈的印记，这意味着对热液活动所在的前陆盆地中的温差计的现有解释可能需要修改。研究结果对地热能也有影响；热液系统周围的高温区是地热能勘探的有利目标，因此必须更好地了解它们的寿命。