Assessment of Chaves Low-Temperature CO₂-Rich Geothermal System (N-Portugal) Using an Interdisciplinary Geosciences Approach

Table 5

Sr concentrations and isotope ratios of rocks and mineral separates from Vilarelho da Raia/Pedras Salgadas region, northern Portugal. Table 5 is reproduced from Marques et al. (2006) [under the Creative Commons Attribution License/public domain].

Samples from outcrops
Reference	Local	Lithology	Sr (ppm)	^87Sr/^86Sr
AM1	Vilarelho da Raia	Granite	74.0	0.777260
AM60	Chaves	Andaluzitic slate	63.5	0.777421
AM1164	Chaves	Graphitic slate	14.4	0.737563
AM1163	Chaves	Quartzite	16.8	0.726642
AM1149	Chaves	Chaves granite	87.6	0.753397
AM1150	Chaves	Outeiro Seco granite	99.5	0.757173
AM1160	Chaves	Faiões granite	93.1	0.743689
AM1161	Chaves	Faiões granite	97.5	0.735697
AM2	Vidago	Vila Pouca de Aguiar granite	98.0	0.735900
Pflum7	Vila Real	Carbonates	2348	0.709485
Samples from drill cores
Ref. (depth)	Local	Lithology	Sr (ppm)	^87Sr/^86Sr
VR13 (53.0 m)	Vilarelho da Raia	Granite	20.1	0.942148
VR18 (70.5 m)	Vilarelho da Raia	Granite	58.8	0.789683
VR70 (195.30 m)	Vilarelho da Raia	Granite	58.7	0.765128
AC21a (14.8 m)	Pedras Salgadas	Vila Pouca de Aguiar granite	59.91	0.763068
AC21e (106.35 m)	Pedras Salgadas	Vila Pouca de Aguiar granite	35.99	0.784371
AC26a (25.15 m)	Vidago	Vila Pouca de Aguiar granite	54.67	0.762890
AC26b (34 m)	Vidago	Vila Pouca de Aguiar granite	57.63	0.761298
Minerals
Reference	Local	Mineral	Sr (ppm)	^87Sr/^86Sr
AM1	Vilarelho da Raia	Microcline	152.0	0.76359
AM1	Vilarelho da Raia	Plagioclase	108.0	0.72087
AM1	Vilarelho da Raia	Muscovite	26.0	0.84459
AM1	Vilarelho da Raia	Biotite	11.0	4.18370
AM2	Vidago	Microcline	101.0	0.75644
AM2	Vidago	Plagioclase	75.0	0.71261
AM2	Vidago	Muscovite	12.0	2.43938
AM2	Vidago	Biotite	108.0	0.70948

Note: Data from [29].