PANGAEA_986777
Onshore correlation glass data for selected tephra units on São Miguel Island, Azores
Belo, Julie
Onshore correlation glass data for selected tephra units on São Miguel Island, Azores
2025-10-27
PANGAEA
Dataset
https://doi.pangaea.de/10.1594/PANGAEA.986777
Investigator
Julie
Schindlbeck-Belo
jbelo@geomar.de
Earth Science
Event label
Sample code/label
Sodium oxide
Potassium oxide
Iron oxide, Fe2O3
Silicon dioxide
Titanium dioxide
Magnesium oxide
Calcium oxide
Manganese oxide
Aluminium oxide
Phosphorus pentoxide
Elements, total
geoscientificInformation
Hammer
S2- Risco Formation/ Sete Cidades
S3- Bretanha Formation/ Sete Cidades
S4- Bretanha Formation/ Sete Cidades
SaoMiguel_S2
SaoMiguel_S3
SaoMiguel_S4
SaoMiguel_SM1
SaoMiguel_SM2
SaoMiguel_SM3
SaoMiguel_SM4
SM1/ Fogo volcano
SM2/ Fogo volcano
SM3/ Furnas volcano
SM4/ Furnas volcano
Electron microprobe JEOL JXA-8200
2003-01-01
2020-01-01
Complete
37.82025
37.88825
-25.82583
-25.81525
VolClimA
Volcanism - climate interaction: A test case from the Azores archipelago
unrestricted
CC-BY-4.0: Creative Commons Attribution 4.0 International
English
PANGAEA
Data Publisher for Earth & Environmental Science
https://www.pangaea.de/
Data Center Contact
Michael
Diepenbroek
info@pangaea.de
Leobener Str.
Bremen
Bremen
28359
Germany
online
7751 data points
text/tab-separated-values
Belo, Julie (2025): Major element glass data of marine tephras around São Miguel Island, Azores [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.986779
A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined.
Additionally, we present glass data for 26 onshore deposits sampled on São Miguel Island. Subaerial lapilli samples were cleaned in an ultrasonic bath and then crushed. All samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany. Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample. Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.986777"! ** S2-S4 analyzed 2020-11-20, SM1-SM4 analyzed 2020-05-21
https://doi.pangaea.de/10.1594/PANGAEA.986779
Major element glass data of marine tephras around São Miguel Island, Azores
https://en.wikipedia.org/wiki/Calcium_oxide
Calcium oxide
https://en.wikipedia.org/wiki/Silicon_dioxide
Silicon dioxide
https://en.wikipedia.org/wiki/Titanium_dioxide
Titanium dioxide
DIF
9.4
2025-10-27
2026-07-10