Citation:

PANGAEA.974359

Name: Major oxide concentrations of individual glass tephra shards from the Greenland ice core TUNU2013_58.04-58.14m, Summit2023_180.52-108.69m, and Summit2023_108.22-108.37m samples
Published: 2025-06-16
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; Greenland; Ice core; Tephra

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Published: 2025-06-16 • DOI registered: 2025-06-16

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Abstract:

Major oxide concentrations of individual glass tephra shards from tephra deposits in the Greenland TUNU2013 [78.04°N/33.88°W] and Summit2023 [72.6°N/38.3°W] ice cores. Deposits analysed are (i) TUNU2013_58.04-58.14m, (ii) Summit2023_180.52-108.69m, and (iii) Summit2023_108.22-108.37m. Normalised analytical data (totals to 100%) and the original analytical totals are reported (before normalisation) all as weight %. Data was obtained using electron probe micro-analysis (EPMA) at the University of Bern, Switzerland and the University of St Andrews, UK. Sample ID, sample depth (m), sample age (Year CE), tephra name (if known), source volcano, and normalised oxide values are provided.

Keyword(s):

Geochemistry; Greenland; Ice core; Tephra

Supplement to:

Gabriel, Imogen; Innes, Helen M; Abbott, Peter M; Franke, Jörg; Behrens, Melanie; Chellman, Nathan J; Hörhold, Maria; Hutchison, William; McConnell, Joseph R; Twarloh, Birthe; Sigl, Michael (2025): Constraining the timing and climate forcing of the Long Island (Papua New Guinea) and Tarumae (Japan) eruptions and other 17th century volcanic eruptions. Journal of Volcanology and Geothermal Research, 464, 108346, https://doi.org/10.1016/j.jvolgeores.2025.108346

Related to:

Gabriel, Imogen; Innes, Helen M; Abbott, Peter M; Hutchison, William; Chellman, Nathan J; Sigl, Michael (2025): Secondary standards for major oxide concentrations of individual glass tephra shards from the Greenland ice core TUNU2013_58.04-58.14m, Summit2023_180.52-108.69m, and Summit2023_108.22-108.37m samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.974360

Funding:

Engineering and Physical Sciences Research Council, grant/award no. EP/L017008/1 : The University of St Andrews - Equipment Account

Engineering and Physical Sciences Research Council, grant/award no. EP/R023751/1 : Electron Microscopy for the Characterisation and Manipulation of Advanced Functional Materials and their Interfaces at the Nanoscale

Engineering and Physical Sciences Research Council, grant/award no. EP/T019298/1 : Light Element Analysis Facility - LEAF

European Research Council (ERC), grant/award no. 820047 : Timing of Holocene volcanic eruptions and their radiative aerosol forcing (THERA)

First Light Fusion, grant/award no. MR/S033505/1 : Taking Earth's volcanic pulse: understanding global volcanic hazards by unlocking the ice core isotope archive

National Science Foundation (NSF), grant/award no. 2139293 : Collaborative Research: Investigating the Rate of Potential Biological in Situ Gas Production of CO and CH4 in Arctic Ice

Coverage:

Median Latitude: 73.181786 * Median Longitude: -37.825357 * South-bound Latitude: 72.600000 * West-bound Longitude: -38.300000 * North-bound Latitude: 78.030000 * East-bound Longitude: -33.870000

Minimum Elevation: 2105.0 m * Maximum Elevation: 3208.0 m

Event(s):

Summit2023 * Latitude: 72.600000 * Longitude: -38.300000 * Elevation: 3208.0 m * Method/Device: Ice drill (ICEDRILL)

TUNU2013 (Tunu13) * Latitude: 78.030000 * Longitude: -33.880000 * Elevation: 2105.0 m * Location: Greenland * Method/Device: Ice drill (ICEDRILL) * Comment: Drilling year: 2013

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Gabriel, Imogen
2	Sample ID	Sample ID		Gabriel, Imogen
3	Laboratory code/label	Lab label		Gabriel, Imogen		Lab ID
4	Core	Core		Gabriel, Imogen
5	LATITUDE	Latitude		Gabriel, Imogen		Geocode
6	LONGITUDE	Longitude		Gabriel, Imogen		Geocode
7	ELEVATION	Elevation	m a.s.l.	Gabriel, Imogen		Geocode
8	AGE	Age	ka BP	Gabriel, Imogen		Geocode – Mean
9	Age, minimum/young	Age min	a AD/CE	Gabriel, Imogen
10	Age, maximum/old	Age max	a AD/CE	Gabriel, Imogen
11	DEPTH, ice/snow	Depth ice/snow	m	Gabriel, Imogen		Geocode – Mean
12	Depth, ice/snow, top/minimum	Depth ice/snow top	m	Gabriel, Imogen
13	Depth, ice/snow, bottom/maximum	Depth ice/snow bot	m	Gabriel, Imogen
14	Source volcano	Source volcano		Gabriel, Imogen
15	Tephra/volcanic ash	Tephra		Gabriel, Imogen		Tephra Name (if known)
16	Date	Date		Gabriel, Imogen
17	Laboratory	Lab		Gabriel, Imogen
18	Instrument	Instrument		Gabriel, Imogen
19	Analytical method	Analyt method		Gabriel, Imogen
20	Silicon dioxide	SiO2	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
21	Titanium dioxide	TiO2	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
22	Aluminium oxide	Al2O3	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
23	Iron oxide, FeO	FeO	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
24	Manganese oxide	MnO	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
25	Magnesium oxide	MgO	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
26	Calcium oxide	CaO	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
27	Sodium oxide	Na2O	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
28	Potassium oxide	K2O	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
29	Phosphorus pentoxide	P2O5	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
30	Chlorine	Cl	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	wt%
31	Elements, total	Total	%	Gabriel, Imogen	Electron Probe Microanalysis (EPMA)	ORIGINAL TOTAL
32	Comment	Comment		Gabriel, Imogen		on data

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1398 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Sample ID	3 Lab label	4 Core	5 Latitude	6 Longitude	7 Elevation [m a.s.l.]	8 Age [ka BP]	9 Age min [a AD/CE]	10 Age max [a AD/CE]	11 Depth ice/snow [m]	12 Depth ice/snow top [m]	13 Depth ice/snow bot [m]	14 Source volcano	15 Tephra	16 Date	17 Lab	18 Instrument	19 Analyt method	20 SiO2 [%]	21 TiO2 [%]	22 Al2O3 [%]	23 FeO [%]	24 MnO [%]	25 MgO [%]	26 CaO [%]	27 Na2O [%]	28 K2O [%]	29 P2O5 [%]	30 Cl [%]	31 Total [%]	32 Comment
TUNU2013	TUNU2013_58.04m–58.14m	TUNU2013_T153_10	TUNU2013	78.03	-33.87	2120	0.28214	1667.36	1668.37	58.0900	58.140	58.040	Shikotsu (Japan)	Ta-b	2022-06-13	Institute of Geological Sciences, University of Bern, Switzerland	JEOL JXA-8200	EPMA	75.71	0.27	13.04	1.83	0.02	0.35	2.33	4.11	2.24	0.09		76.66
TUNU2013	TUNU2013_58.04m–58.14m	TUNU2013_T153B_1	TUNU2013	78.03	-33.87	2120	0.28214	1667.36	1668.37	58.0900	58.140	58.040	Shikotsu (Japan)	Ta-b	2022-09-19	Institute of Geological Sciences, University of Bern, Switzerland	JEOL JXA-8200	EPMA	77.24	0.38	12.32	1.73	0.05	0.29	1.90	3.45	2.51	0.14		78.03
TUNU2013	TUNU2013_58.04m–58.14m	TUNU2013_T153B_3	TUNU2013	78.03	-33.87	2120	0.28214	1667.36	1668.37	58.0900	58.140	58.040	Shikotsu (Japan)	Ta-b	2022-09-19	Institute of Geological Sciences, University of Bern, Switzerland	JEOL JXA-8200	EPMA	76.39	0.33	12.62	1.85	0.12	0.38	2.05	3.59	2.46	0.20		84.85
TUNU2013	TUNU2013_58.04m–58.14m	TUNU2013_T153B_11	TUNU2013	78.03	-33.87	2120	0.28214	1667.36	1668.37	58.0900	58.140	58.040	Shikotsu (Japan)	Ta-b	2022-09-19	Institute of Geological Sciences, University of Bern, Switzerland	JEOL JXA-8200	EPMA	75.67	0.43	13.16	2.41	0.10	0.45	2.35	3.17	2.12	0.13		89.18
TUNU2013	TUNU2013_58.04m–58.14m	TUNU2013_T153B_16	TUNU2013	78.03	-33.87	2120	0.28214	1667.36	1668.37	58.0900	58.140	58.040	Shikotsu (Japan)	Ta-b	2022-09-19	Institute of Geological Sciences, University of Bern, Switzerland	JEOL JXA-8200	EPMA	76.22	0.41	12.61	1.99	0.05	0.36	2.22	3.75	2.25	0.16		98.72
TUNU2013	TUNU2013_58.04m–58.14m	TUNU2013_T153B_23	TUNU2013	78.03	-33.87	2120	0.28214	1667.36	1668.37	58.0900	58.140	58.040	Shikotsu (Japan)	Ta-b	2022-09-19	Institute of Geological Sciences, University of Bern, Switzerland	JEOL JXA-8200	EPMA	76.53	0.39	12.31	2.06	0.05	0.33	2.14	3.69	2.19	0.30		76.61
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_1	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.62	0.28	12.63	1.93	0.05	0.41	2.05	3.41	2.34	0.04	0.23	99.50
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_3	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.19	0.43	12.54	2.61	0.06	0.54	2.44	3.67	2.15	0.28	0.08	100.20
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_4	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.69	0.28	12.14	2.02	0.00	0.33	2.21	3.65	2.22	0.26	0.19	99.00
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_5	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.33	0.27	12.73	2.36	0.12	0.43	2.17	4.10	2.37	0.00	0.13	100.54	High Total - High Si?
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_6	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.60	0.25	12.61	1.99	0.01	0.50	2.24	4.20	2.38	0.00	0.23	99.22
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_7	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.69	0.31	12.61	1.83	0.17	0.33	2.02	3.65	2.19	0.13	0.07	98.88
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_8	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.36	0.35	12.53	1.68	0.03	0.38	2.15	4.11	2.21	0.03	0.18	99.62
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_9	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.53	0.35	12.87	2.36	0.23	0.39	2.46	3.54	2.10	0.00	0.18	98.78
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_10	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.06	0.36	12.95	2.50	0.00	0.49	2.38	3.91	2.20	0.00	0.13	99.12
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_11	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.22	0.29	12.63	2.13	0.00	0.33	2.71	4.33	2.23	0.02	0.11	100.83	High Total - High Si?
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_12	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	74.80	0.41	12.42	2.64	0.09	0.33	2.17	4.16	2.26	0.20	0.51	87.44	Low Total, normalised Cl and P slightly higher - possibly small amount of beam on resin?
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_13	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.64	0.27	12.32	1.90	0.00	0.36	2.06	3.84	2.43	0.03	0.15	98.64
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_14	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.88	0.41	12.85	2.13	0.00	0.41	2.16	3.62	2.38	0.05	0.11	98.50
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_15	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.46	0.40	13.07	2.37	0.07	0.41	2.38	3.51	2.14	0.00	0.19	98.91
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_16	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.35	0.34	12.96	2.05	0.11	0.51	2.32	3.81	2.36	0.00	0.18	99.95
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_17	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.83	0.33	12.36	2.10	0.16	0.23	2.27	3.16	2.30	0.08	0.18	98.82
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_18	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	74.90	0.41	12.89	2.30	0.09	0.40	2.41	4.17	2.13	0.21	0.10	100.01
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_19	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	74.49	0.40	13.16	2.65	0.25	0.50	2.45	3.94	2.05	0.00	0.12	100.50
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_20	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.73	0.40	12.92	1.96	0.07	0.42	2.16	3.79	2.25	0.16	0.12	97.80
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_21	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.32	0.41	12.53	2.59	0.13	0.64	2.34	3.46	2.32	0.10	0.17	99.77
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_22	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	74.07	0.50	12.87	2.63	0.00	0.44	2.55	4.28	2.20	0.33	0.12	100.23
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_23	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.81	0.42	12.62	1.98	0.13	0.34	2.09	4.13	2.31	0.00	0.16	100.24
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_24	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	77.32	0.28	12.49	1.84	0.00	0.36	2.00	3.06	2.49	0.06	0.10	98.85
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_25	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.03	0.29	12.58	1.90	0.12	0.42	2.08	3.93	2.34	0.10	0.21	98.89
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_26	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.61	0.43	12.80	2.53	0.00	0.40	2.34	3.46	2.24	0.01	0.19	99.71
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_27	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.20	0.45	12.39	1.92	0.17	0.45	2.29	3.68	2.11	0.18	0.16	99.64
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_28	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.58	0.40	12.71	2.17	0.12	0.40	2.38	2.85	2.21	0.00	0.16	99.37
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_29	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	76.06	0.49	12.41	2.33	0.15	0.41	2.37	3.50	2.15	0.00	0.12	97.79
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_30	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.60	0.35	12.87	1.92	0.04	0.41	2.28	3.85	2.35	0.19	0.13	99.65
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_31	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.63	0.45	12.37	2.27	0.06	0.46	2.67	3.63	2.19	0.09	0.19	97.85
Summit2023	Summit2023_108.52m–108.69m	1667CE_Summit23_2_32	Summit2023	72.60	-38.30	3208	0.28242	1667.26	1667.89	108.6025	108.690	108.515	Shikotsu (Japan)	Ta-b	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	75.13	0.29	12.82	2.39	0.03	0.53	2.53	3.77	2.17	0.17	0.18	98.30
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_1	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	59.55	1.02	17.02	7.04	0.16	2.73	5.06	4.22	2.86	0.20	0.14	98.60
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_2	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.93	0.95	17.34	7.27	0.08	2.80	5.64	3.79	2.69	0.29	0.22	98.21
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_4	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.39	1.00	16.39	7.68	0.23	2.84	5.19	4.91	2.90	0.23	0.25	98.34
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_8	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	57.18	0.97	17.19	8.19	0.21	3.12	6.85	3.57	2.17	0.45	0.10	98.61
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_9	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.38	0.91	16.38	7.61	0.17	2.83	6.37	4.50	2.31	0.39	0.15	98.82
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_10	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	59.44	0.90	17.10	6.67	0.08	1.82	5.94	5.13	2.46	0.21	0.26	99.29
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_11	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.96	0.87	16.37	7.57	0.17	2.81	5.77	4.39	2.68	0.23	0.18	97.54
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_12	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	57.95	0.88	17.17	8.01	0.26	3.13	6.06	3.54	2.42	0.41	0.18	97.81
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_13	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	61.63	0.92	16.22	6.52	0.18	2.07	4.85	4.36	2.84	0.16	0.26	98.36
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_14	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.79	0.94	16.95	7.83	0.10	2.87	6.09	3.45	2.48	0.30	0.18	97.85
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_15	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.48	1.07	17.26	7.19	0.24	3.06	6.04	3.77	2.30	0.34	0.24	97.79
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_16	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.12	1.27	14.58	8.81	0.29	3.74	5.98	4.35	2.44	0.19	0.23	97.03
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_17	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.76	0.89	17.06	6.87	0.26	2.94	6.08	4.28	2.39	0.28	0.19	99.30
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_19	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.79	0.91	16.46	7.48	0.17	2.87	6.21	4.13	2.55	0.23	0.19	97.97
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_22	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	58.96	1.01	16.33	7.64	0.09	2.55	5.51	4.65	2.80	0.31	0.15	97.92
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_21	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	68.19	0.44	15.60	3.57	0.06	0.41	3.08	4.64	3.67	0.10	0.24	99.22
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_6	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	68.91	0.52	15.04	3.03	0.09	0.52	2.28	5.20	4.18	0.11	0.13	99.12
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_7	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	69.98	0.49	15.65	2.60	0.04	0.42	1.62	4.93	4.05	0.08	0.15	99.31
Summit2023	Summit2023_108.22m–108.37m	1667CE_Summit23_4_5	Summit2023	72.60	-38.30	3208	0.28096	1668.68	1669.39	108.2900	108.365	108.215	UNKNOWN	-	2024-07-24	University of St Andrews Electon Microprobe Facility, UK	JEOL JXA-isp100	EPMA	77.52	0.19	12.99	0.62	0.19	0.05	0.66	2.68	5.10	0.00	0.00	96.68	Low Fe, Ca