Citation:

PANGAEA.935167

Name: Geochemistry of tephra from sediment core IZN19-09 from Lake Iznik (NW Turkey)
Published: 2021-08-20
License: https://creativecommons.org/licenses/by/4.0/
Keywords: EPMA; GLASS; Iznik; Lake; sediment; sediment core data; Turkey; volcanic eruption

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Published: 2021-08-20 • DOI registered: 2022-10-19

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Abstract:

The occurrence of previously geochemically identified tephra allowed refinement of the age-depth model by comparison with previously established volcanic eruption history (Roeser et al., 2012). Tephra layers were polished on thin sections and the glass shards were geochemically characterized using a JEOL JXA-8230 Electron Probe X-ray Micro Analyzer (EMPA; ISTerre Laboratory, University Grenoble Alpes) equipped with 5 wavelength dispersive spectrometers (WDS) and one energy dispersive spectrometer (EDS) detector. The measurements used the following conditions: 15 kV voltage, 2 nA beam current, and 5 to 7 µm beam size. For standardization, MPI-DING glasses (StHs6/80-G, GOR132-G) (http://georem.mpch-mainz.gwdg.de; Jochum et al., 2000), natural minerals, and synthetic oxides were used. Two glasses, Atho-G (http://georem.mpch-mainz.gwdg.de; Jochum et al., 2000) and KE-12 (Metrich & Rutherford, 1992), were analyzed together with the samples to verify analytical accuracy and to exclude the loss of alkalis. Analyses of glass shards yielding a total oxide sum less than 96% or suggesting mineral impurities were not included in this study. Analytical data were normalized to 100% total oxide values to enable comparison.

Keyword(s):

EPMA; GLASS; Iznik; Lake; sediment; sediment core data; Turkey; volcanic eruption

Related to:

Andronico, D; Cioni, Raffaello (2002): Contrasting styles of Mount Vesuvius activity in the period between the Avellino and Pompeii Plinian eruptions, and some implications for assessment of future hazards. Bulletin of Volcanology, 64(6), 372-391, https://doi.org/10.1007/s00445-002-0215-4

Jochum, Klaus Peter; Dingwell, Donald B; Rocholl, Alexander; Stoll, Brigitte; Hofmann, Albrecht W; Becker, Stefan; Besmehn, Astrid; Bessette, D; Dietze, H-J; Dulski, Peter; Erzinger, Jörg; Hellebrand, Eric; Hoppe, P; Horn, Ingo; Janssens, Koen; Jenner, G A; Klein, M; McDonough, W F; Maetz, M; Mezger, Klaus; Müker, C; Nikogosian, Igor; Pickhardt, Carola; Raczek, Ingrid; Rhede, D; Seufert, H M; Simakin, Sergey; Sobolev, Alexander V; Spettel, Bernhard; Straub, S; Vincze, Laszlo; Wallianos, A; Weckwerth, Gerd; Weyer, Stefan; Wolf, D; Zimmer, M (2000): The Preparation and Preliminary Characterisation of Eight Geological MPI-DING Reference Glasses for In-Situ Microanalysis. Geostandards and Geoanalytical Research, 24(1), 87-133, https://doi.org/10.1111/j.1751-908X.2000.tb00590.x

Métrich, Nicole; Rutherford, Malcolm J (1992): Experimental study of chlorine behavior in hydrous silicic melts. Geochimica et Cosmochimica Acta, 56(2), 607-616, https://doi.org/10.1016/0016-7037(92)90085-W

Roeser, Patricia A (2014): Paleolimnology of Lake Iznik (NW Turkey) during the past ~ 31 ka cal BP [dissertation]. Rheinische Friedrich-Wilhelms-Universität Bonn, https://hdl.handle.net/20.500.11811/6103

Roeser, Patricia A; Franz, Sven-Oliver; Litt, Thomas; Ülgen, Umut Baris; Hilgers, Alexandra; Wulf, Sabine; Wennrich, Volker; Akcer-Ön, Sena; Viehberg, Finn Andreas; Çagatay, M Namik; Melles, Martin (2012): Lithostratigraphic and geochronological framework for the paleoenvironmental reconstruction of the last ~36 ka cal BP from a sediment record from Lake Iznik (NW Turkey). Quaternary International, 274, 73-87, https://doi.org/10.1016/j.quaint.2012.06.006

Rolandi, Giuseppe; Petrosino, Paola; Mc Geehin, J (1998): The interplinian activity at Somma–Vesuvius in the last 3500 years. Journal of Volcanology and Geothermal Research, 82(1-4), 19-52, https://doi.org/10.1016/S0377-0273(97)00056-5

Santacroce, Roberto; Cioni, Raffaello; Marianelli, Paola; Sbrana, Alessandro; Sulpizio, Roberto; Zanchetta, Giovanni; Donahue, Douglas J; Joron, Jean Louis (2008): Age and whole rock–glass compositions of proximal pyroclastics from the major explosive eruptions of Somma-Vesuvius: A review as a tool for distal tephrostratigraphy. Journal of Volcanology and Geothermal Research, 177(1), 1-18, https://doi.org/10.1016/j.jvolgeores.2008.06.009

Project(s):

Secret Archives of the Basilica of Nicea provided by the Sediments of Iznik Lake (BASILIZNIK-SECRETS)

Coverage:

Latitude: 40.436646 * Longitude: 29.535986

Date/Time Start: 2019-07-16T14:53:00 * Date/Time End: 2019-07-16T14:53:00

Event(s):

IZN19-09 * Latitude: 40.436646 * Longitude: 29.535986 * Date/Time: 2019-07-16T14:53:00 * IGSN: https://doi.org/10.57977/TOAE0000000315 * Lake water depth: 48 m * Recovery: 3.5 m * Location: Iznik Lake, Turkey * Campaign: * Method/Device: Hammering-push core, UWITEC PILOTE 63 (HPUWI63) * Comment: Core diameter (inside): 63 mm.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Core	Core		Gastineau, Renaldo
2	Sample comment	Sample comment		Gastineau, Renaldo		Spectrum
3	Silicon dioxide	SiO2	%	Gastineau, Renaldo	Electron probe microanalyzer (EPMA), JEOL JXA 8230	wt%
4	Sodium oxide	Na2O	%	Gastineau, Renaldo	Electron probe microanalyzer (EPMA), JEOL JXA 8230	wt%
5	Potassium oxide	K2O	%	Gastineau, Renaldo	Electron probe microanalyzer (EPMA), JEOL JXA 8230	wt%
6	Sum	Sum	%	Gastineau, Renaldo	Calculated	Alkalis, total (wt%)
7	Iron oxide, FeO	FeO	%	Gastineau, Renaldo	Electron probe microanalyzer (EPMA), JEOL JXA 8230	wt%
8	Aluminium oxide	Al2O3	%	Gastineau, Renaldo	Electron probe microanalyzer (EPMA), JEOL JXA 8230	wt%

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

344 data points

Data

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

1 Core	2 Sample comment	3 SiO2 [%]	4 Na2O [%]	5 K2O [%]	6 Sum [%]	7 FeO [%]	8 Al2O3 [%]
IZN19-09	p1	55.57	8.60	6.89	15.49	2.31	22.23
IZN19-09	p2	56.52	7.19	7.86	15.05	2.46	21.57
IZN19-09	p3	56.47	8.26	7.77	16.02	1.87	22.71
IZN19-09	p5	59.77	4.17	9.07	13.24	3.54	18.71
IZN19-09	p7	56.69	6.51	7.46	13.97	3.15	21.05
IZN19-09	p8	55.32	6.36	7.55	13.91	3.54	20.82
IZN19-09	p9	55.37	8.67	7.11	15.79	2.14	22.76
IZN19-09	p10	55.75	7.31	7.56	14.87	2.71	21.94
IZN19-09	p12	55.82	6.66	7.77	14.43	3.27	21.33
IZN19-09	p13	50.66	4.89	8.52	13.41	6.11	19.89
IZN19-09	p15	55.40	7.31	7.77	15.09	2.49	22.00
IZN19-09	p16	54.08	6.32	5.68	12.00	3.74	21.10
IZN19-09	p18	56.30	6.32	7.72	14.04	3.07	21.01
IZN19-09	p19	56.39	7.42	7.82	15.24	2.11	22.29
IZN19-09	p20	55.64	7.65	8.18	15.83	2.33	22.17
IZN19-09	p21	55.61	6.80	7.98	14.78	2.88	21.27
IZN19-09	p22	55.46	5.74	7.57	13.30	3.90	20.87
IZN19-09	p23	55.58	6.74	7.86	14.60	2.86	21.89
IZN19-09	p24	54.75	6.68	7.58	14.26	3.26	21.30
IZN19-09	p26	56.39	6.84	7.13	13.97	2.77	21.74
IZN19-09	p27	55.68	8.28	7.35	15.64	2.34	22.01
IZN19-09	p28	55.50	7.32	7.73	15.05	2.77	22.02
IZN19-09	p29	52.10	5.19	7.84	13.02	5.14	20.10
IZN19-09	p30	55.09	8.45	7.86	16.32	1.83	23.06
IZN19-09	p32	54.49	8.01	7.37	15.37	3.16	22.37
IZN19-09	p33	43.56	16.51	3.82	20.33	0.44	33.99
IZN19-09	p34	54.99	8.65	7.02	15.67	2.84	22.56
IZN19-09	p35	55.57	7.10	7.91	15.00	2.87	21.68
IZN19-09	p36	55.50	7.94	7.48	15.41	2.78	22.60
IZN19-09	p37	58.30	5.73	3.87	9.60	1.12	24.40
IZN19-09	p38	56.16	8.10	7.71	15.81	2.40	21.68
IZN19-09	p39	53.88	6.94	6.49	13.43	3.65	19.52
IZN19-09	p40	55.88	6.70	8.00	14.70	2.93	21.08
IZN19-09	p41	56.25	6.56	7.74	14.29	3.11	20.78
IZN19-09	p42	58.10	5.56	5.57	11.13	1.64	23.18
IZN19-09	p44	55.24	7.11	7.46	14.57	3.05	21.57
IZN19-09	p45	54.77	7.81	7.14	14.95	2.97	22.54
IZN19-09	p46	55.42	9.83	7.20	17.03	1.80	23.06
IZN19-09	p47	56.07	6.52	7.03	13.56	2.96	21.59
IZN19-09	p48	54.88	11.04	5.16	16.20	1.86	23.12
IZN19-09	p49	55.56	8.81	6.61	15.42	2.11	23.05
IZN19-09	p51	55.42	5.24	2.01	7.25	1.09	27.02
IZN19-09	p52	55.06	6.72	7.49	14.21	3.25	20.86