Assessment of Chaves Low-Temperature CO2-Rich Geothermal System (N-Portugal) Using an Interdisciplinary Geosciences Approach
المؤلفون المشاركون
Monteiro Santos, F.
Marques, J. M.
Carreira, P. M.
Aires-Barros, L. A.
Antunes da Silva, M.
Represas, P.
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-24، 24ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-02-25
دولة النشر
مصر
عدد الصفحات
24
التخصصات الرئيسية
الملخص EN
This paper reviews the results of a multi- and interdisciplinary approach, including geological, geomorphological, tectonic, geochemical, isotopic, and geophysical studies, on the assessment of a Chaves low-temperature (77°C) CO2-rich geothermal system, occurring in the northern part of the Portuguese mainland.
This low-temperature geothermal system is ascribed to an important NNE-trending fault, and the geomorphology is dominated by the “Chaves Depression,” a graben whose axis is oriented NNE-SSW.
The study region is situated in the tectonic unit of the Middle Galicia/Trás-os-Montes subzone of the Central Iberian Zone of the Hesperic Massif comprising mainly Variscan granites and Paleozoic metasediments.
Chaves low-temperature CO2-rich geothermal waters belong to the Na-HCO3-CO2-rich-type waters, with pH≈7.
Total dissolved solids range between 1600 and 1850 mg/L.
Free CO2 is of about 500 mg/L.
The results of SiO2 and K2/Mg geothermometers give estimations of reservoir temperature around 120°C.
δ18O and δ2H values of Chaves low-temperature CO2-rich geothermal waters indicate a meteoric origin for these waters.
No significant 18O-shift was observed, consistent with the results from the chemical geothermometry.
δ13CCO2 values vary between −7.2 and −5.1‰ vs.
V-PDB, and CO2/3He ratios range from 1×108 to 1×109, indicating a deep (upper mantle) source for the CO2.
3He/4He ratios are of about 0.9 (R/Ra).
The Chaves low-temperature CO2-rich geothermal waters present similar 87Sr/86Sr ratios (between 0.728035 and 0.716713) to those of the plagioclases from granitic rocks (between 0.72087 and 0.71261) suggesting that water mineralization is strongly ascribed to Na-plagioclase hydrolysis.
Geophysical methods (e.g., resistivity and AMT soundings) detected conductive zones concentrated in the central part of the Chaves graben as a result of temperature combined with the salinity of the Chaves low-temperature CO2-rich geothermal waters in fractured and permeable rock formations.
This paper demonstrates the added value of an integrated and multi- and interdisciplinary approach for a given geothermal site characterization, which could be useful for other case studies linking the assessment of low-temperature CO2-rich geothermal waters and cold CO2-rich mineral waters emerging in a same region.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Marques, J. M.& Carreira, P. M.& Aires-Barros, L. A.& Monteiro Santos, F.& Antunes da Silva, M.& Represas, P.. 2019. Assessment of Chaves Low-Temperature CO2-Rich Geothermal System (N-Portugal) Using an Interdisciplinary Geosciences Approach. Geofluids،Vol. 2019, no. 2019, pp.1-24.
https://search.emarefa.net/detail/BIM-1152508
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Marques, J. M.…[et al.]. Assessment of Chaves Low-Temperature CO2-Rich Geothermal System (N-Portugal) Using an Interdisciplinary Geosciences Approach. Geofluids No. 2019 (2019), pp.1-24.
https://search.emarefa.net/detail/BIM-1152508
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Marques, J. M.& Carreira, P. M.& Aires-Barros, L. A.& Monteiro Santos, F.& Antunes da Silva, M.& Represas, P.. Assessment of Chaves Low-Temperature CO2-Rich Geothermal System (N-Portugal) Using an Interdisciplinary Geosciences Approach. Geofluids. 2019. Vol. 2019, no. 2019, pp.1-24.
https://search.emarefa.net/detail/BIM-1152508
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1152508
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر