Response of a hydrothermal system to escalating phreatic unrest: the case of Turrialba and Irazú in Costa Rica (2007–2012)

Earth, Planets and Space

Table 7 SO₄/major elements ratios (e.g. SO₄/Na; the ratio for Si is reported as SO₄/SiO₂) and major elements oxides discharge (e.g. QNa₂O) for the studied thermal springs

Sample	SO₄/SiO₂	SO₄/Na	SO₄/K	SO₄/Ca	SO₄/Mg	SO₄/Fe	SO₄/Al	QSiO₂	QNa₂O	QK₂O	QCaO	QMgO	QFe₂O3	QAl₂O₃	Rock output
Sample	SO₄/SiO₂	SO₄/Na	SO₄/K	SO₄/Ca	SO₄/Mg	SO₄/Fe	SO₄/Al	mg/s	mg/s	mg/s	mg/s	mg/s	mg/s	mg/s	mg/s	m³/year
SC	6.1	12.1	31.2	10.7	13.5	18.7	14.7	16,536	22,706	7805	13,259	12,492	15,478	26,139	215,834	2431
BLP + ST	4.2	7.4	30.6	3.7	19.6	20.2	37,577.1	5084	7900	1692	8120	1826	3045	2	49,209	554
OJA1	7.4	30.7	77.8	6.6	16.3	159.8	47.9	72	46	16	113	54	9	42	882	10
HBA2	2.1	5.5	12.7	3.1	6.8	297.6	696.5	625	635	246	594	316	12	7	3735	42
Total rock output															269,660	3037

Rock output rates for the springs are reported (in mg/s, corresponding to m³/y by assuming a rock density of 2800 kg/m³), together with a total rock output for the whole of studied thermal springs. Abbreviations as in Table 2