Heat-producing granitoids of North Pakistan as potential geothermal prospects

巴基斯坦北部的产热花岗岩具有潜在的地热前景

• 批准号: 494793953
• 负责人: Professor Dr. Jonas Kley
• 金额: --
• 依托单位: Quaid-i-Azam University
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/494793953?language=en
• 关键词: Heat; producing; granitoids; North; Pakistan

The Himalayas of North Pakistan expose numerous and in part voluminous granitoid rocks enriched in radiogenic elements. Elevated surface heat flow in the region has been attributed in part to shallow production of radiogenic heat in these rocks, in concert with rapid exhumation and potentially frictional/strain heating. We aim to explore the role of radiogenic heat production by sampling a range of typical lithologies and determining their radiogenic nuclide contents and other geochemical parameters. The data obtained will be used in numerical models. These models are designed to test the effect of variations in radiogenic content, shapes and volumes of granitoids versus background heat flux on temperatures of the shallow (down to a few km) subsurface and of hot spring waters. On the basis of a first sampling campaign and preliminary analyses of radiogenic contents we hypothesize that large-volume granitoids and gneisses with somewhat lower concentrations of radiogenic nuclides may be better targets for geothermal exploration than small, strongly enriched leucogranites and pegmatites. Improved understanding of the geothermal potential as a function of the geological framework in North Pakistan may benefit communities living in these remote regions.

巴基斯坦北部的喜马拉雅山脉暴露出大量富含放射性元素的花岗岩类岩石。该地区表面热流升高的部分原因是这些岩石浅层产生的放射热，以及快速折返和潜在的摩擦/应变加热。我们的目标是通过对一系列典型岩性进行采样并确定其放射性核素含量和其他地球化学参数来探索放射性热产生的作用。获得的数据将用于数值模型。这些模型旨在测试花岗岩的放射性含量、形状和体积的变化与背景热通量对浅层（低至几公里）地下和温泉水温度的影响。根据第一次采样活动和对放射性含量的初步分析，我们假设放射性核素浓度较低的大体积花岗岩和片麻岩可能比小型、富集的淡色花岗岩和伟晶岩更好的地热勘探目标。更好地了解巴基斯坦北部地质框架的地热潜力可能会使生活在这些偏远地区的社区受益。