Table 1 Isotopic data of noble gases in the crystal structure of olivines (uncertainties are 1σ) that allow the geochronological estimates in the pre- and syn-caldera samples. Blanks [⁴He] ccSTP/g from 2.9 to 22%.

Sample	Episode	Location	Latitude	Altitude (m.a.s.l.)	Extraction	Weight	³He/⁴He	Error	²¹Ne/²²Ne	Error
Sample	Episode	Location	Latitude	Altitude (m.a.s.l.)	Extraction	(g)	R/Ra	Error	²¹Ne/²²Ne	Error
DI-68 Olivine	Pre-caldera	Kendall Terrace			Crushing*	0.0838	7.10	0.61
					Stepwise heating 800℃	0.0094	11.7	7.8
			− 62.93849	63	Stepwise heating 1800℃		57.0	16.8	0.02899	0.00016
					Total fusion 2000℃		910	67	0.02938	0.00017
					Heating total
DI-35 Olivine	Syn-caldera	Irizar Lake			Crushing*	0.1219	6.02	0.59
					Stepwise heating 800℃	0.0046	2.1	1.6	0.0285	0.0018
			− 62.983897	150	Stepwise heating 1800℃		26.3	8.5	0.02915	0.00013
					Total fusion 1900℃		27.4	8.0	0.02893	0.00014
					Heating total
DI-36 Olivine	Syn-caldera	Irizar Lake	− 62.983884	150	Crushing*	0.1117	7.12	0.59
DI-36 Olivine	Syn-caldera	Irizar Lake			Total fusion 1900℃	0.048	43	19	0.0290	0.0006
DI-18 Olivine	Pre-caldera	Fumarole Bay	− 62.965994	120	Total fusion	0.0656	6.96	0.14	0.02886	0.00095
DI-67 Olivine	Pre-caldera	Kendall Terrace	− 62.938507	63	Total fusion	0.0638	4.41	0.14	0.02938	0.00093
PRR-10298 Olivine	Pre-caldera	Fumarole Bay	− 62.95	135	Total fusion	0.0232	5.70	0.19	0.02838	0.00124

Sample	Episode	Location	²⁰Ne/²²Ne	Error	[⁴He]	Error	[³He]	Error	[²⁰Ne]	Error
Sample	Episode	Location	²⁰Ne/²²Ne	Error	ccSTP/g	Error	atom/g	Error	ccSTP/g	Error
DI-68 Olivine	Pre-caldera	Kendall Terrace
					3.65E − 09	6.00E − 10	6.28E + 05	1.08E + 06	b. b
			9.809	0.011	3.61E − 09	6.00E − 10	6.78E + 06	2.55E + 06	3.36E − 07	3.36E − 08
			10.069	0.009	1.81E − 08	1.00E − 09	6.15E + 08	5.67E + 07	5.47E − 07	5.47E − 08
					2.54E − 08	1.31E − 09	6.22E + 08	5.67E + 07	8.83E − 07	6.42E − 08
DI-35 Olivine	Syn-caldera	Irizar Lake
			9.775	0.036	1.22E − 08	1.30E − 09			5.51E − 04	5.52E − 09
			9.962	0.011	1.86E − 08	1.50E − 09	1.42E + 07	6.04E + 06	1.43E − 06	1.43E − 07
			9.812	0.010	1.03E − 08	6.90E − 10	8.27E + 06	3.16E + 06	1.66E − 05	1.66E − 07
					4.11E − 08	2.10E − 09	2.24E + 07	6.82E + 06	5.69E − 04	2.19E − 07
DI-36 Olivine	Syn-caldera	Irizar Lake
DI-36 Olivine	Syn-caldera	Irizar Lake	9.796	0.053	4.40E − 10	2.20E − 11	5.97E + 05	3.15E + 05	6.10E − 10	7.00E − 11
DI-18 Olivine	Pre-caldera	Fumarole Bay	9.706	0.074	2.84E − 08	1.40E − 09	7.43E + 06	3.94E + 05	1.40E − 10	2.00E − 11
DI-67 Olivine	Pre-caldera	Kendall Terrace	9.774	0.048	1.36E − 08	8.80E − 10	2.26E + 06	1.63E + 05	2.72E − 10	3.20E − 11
PRR-10298 Olivine	Pre-caldera	Fumarole Bay	9.775	0.059	1.91E − 08	1.10E − 09	4.09E + 06	2.74E + 05	3.40E − 10	4.00E − 11

Significant values are given in bold.
Air:³He/⁴He-1.4 × 10⁻⁶, reference: Pepin & Porcelli, 2002; Sun: ³He/⁴He- 3.98±0.3 ×10^-4, reference: Ozima et al., 2012; Solar wind: ³He/⁴He- 4.64±0.1 ×10^-4, reference: Heber et al., 2009; MORB: ³He/⁴He-1.12 ×10^-5, reference: Graham, 2002; OIB: ³He/⁴He-5.6 - 70 ×10^-6, reference: Hanyu & Kaneoka, 1997.
b.b. below blank.
*³He/⁴He corrected for air contamination from Álvarez-Valero et al., 2022b.

Search