Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10040-017-1533-0 |
Insights into Andean slope hydrology: reservoir characteristics of the thermal Pica spring system, Pampa del Tamarugal, northern Chile | |
Scheihing, Konstantin W.1; Moya, Claudio E.2,3; Troeger, Uwe1 | |
通讯作者 | Scheihing, Konstantin W. |
来源期刊 | HYDROGEOLOGY JOURNAL
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ISSN | 1431-2174 |
EISSN | 1435-0157 |
出版年 | 2017 |
卷号 | 25期号:6页码:1833-1852 |
英文摘要 | The thermal Pica springs, at 1,400 m above sea level (asl) in the Pampa del Tamarugal (Chile), represent a low-saline spring system at the eastern margin of the hyper-arid Atacama Desert, where groundwater resources are scarce. This study investigates the hydrogeological and geothermal characteristics of their feed reservoir, fostered by the interpretation of a 20-km east-west-heading reflection-seismic line in the transition zone from the Andean Precordillera to the Pampa del Tamarugal. Additional hydrochemical, isotope and hydrologic time-series data support the integrated analysis. One of the main factors that enabled the development of the spring-related vertical fracture system at Pica, is a disruption zone in the Mesozoic Basement caused by intrusive formations. This destabilized the younger Oligocene units under the given tectonic stress conditions; thus, the respective groundwater reservoir is made up of fractured Oligocene units of low to moderate permeability. Groundwater recharge takes place in the Precordillera at 3,800 m asl. From there groundwater flow covers a height difference of 3,000 m with a maximum circulation depth of 800-950 m, where the waters obtain their geothermal imprint. The maximal expected reservoir temperature, as confirmed by geothermometers, is 55 A degrees C. Corrected mean residence times of spring water and groundwater plot at 1,200-4,300 years BP and yield average interstitial velocities of 6.5-22 m/year. At the same time, the hydraulic head signal, as induced by recharge events in the Precordillera, is transmitted within 20-24 months over a distance of 32 km towards the Andean foothills at Pica and Puquio Nunez. |
英文关键词 | Groundwater flow Geothermal springs Chile Seismic Arid regions |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Chile |
收录类别 | SCI-E |
WOS记录号 | WOS:000407923900021 |
WOS关键词 | DISSOLVED INORGANIC CARBON ; ATACAMA DESERT ; REGIONAL AQUIFER ; GROUNDWATER ; ORIGIN ; PRECIPITATION ; VARIABILITY ; ISOTOPE ; MODELS ; WATER |
WOS类目 | Geosciences, Multidisciplinary ; Water Resources |
WOS研究方向 | Geology ; Water Resources |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/199460 |
作者单位 | 1.Tech Univ t Berlin, Dept Appl Geosci, Hydrogeol Res Grp, D-10587 Berlin, Germany; 2.Ctr Invest & Desarrollo Recursos Hidr R09I1001, Iquique, Chile; 3.Arturo Prat Univ, Iquique, Chile |
推荐引用方式 GB/T 7714 | Scheihing, Konstantin W.,Moya, Claudio E.,Troeger, Uwe. Insights into Andean slope hydrology: reservoir characteristics of the thermal Pica spring system, Pampa del Tamarugal, northern Chile[J],2017,25(6):1833-1852. |
APA | Scheihing, Konstantin W.,Moya, Claudio E.,&Troeger, Uwe.(2017).Insights into Andean slope hydrology: reservoir characteristics of the thermal Pica spring system, Pampa del Tamarugal, northern Chile.HYDROGEOLOGY JOURNAL,25(6),1833-1852. |
MLA | Scheihing, Konstantin W.,et al."Insights into Andean slope hydrology: reservoir characteristics of the thermal Pica spring system, Pampa del Tamarugal, northern Chile".HYDROGEOLOGY JOURNAL 25.6(2017):1833-1852. |
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