Geochemical and petrological data pertaining to the eruptive deposits of 1883 caldera-forming eruption of Krakatau (NERC grants NE/L002612/1, NE/N014286/1, NE/T002026/1)
Geochemical data has been collected on samples from new exposures of the 1883 deposits, revealed by the 2018 tsunamigenic flank collapse of Anak Krakatau, which provides improved stratigraphic context. Whole-rock data taken by X-ray Florescence shows no systematic stratigraphic correlation. Chemical data for transects across, and spot points on, plagioclase phenocrysts, including some trace element data, all obtained using Electron Probe Microanalysis (EPMA), with Backscatter electron (BSE) images of crystals, obtained using Scanning Electron Microscope, reveal complex zoning profiles. However, chemical data for transects across pyroxene phenocrysts, obtained using EPMA, show this phenocryst phase is largely unzoned. The dataset also includes chemical data for spots on Fe/Ti oxides, included on the rims of pyroxene, and obtained using EPMA. Matrix glass chemistry, obtained via EPMA, shows that the early eruptive ash is more evolved than the pyroclastic material that follows, and that there is a slight overall trend to a more homogenous, less evolved melt composition. The 1883 eruption of Krakatau was a large, cardera-forming eruption that caused approximately 36,000 fatalities. It is also the only eruption of its size to have accompanying written accounts.
dataset
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item137445
name: Data
function: download
https://doi.org/10.5285/ad2a4fa0-7b66-4ec5-a5cf-d78944716ec4
name: Digital Object Identifier (DOI)
function: information
http://data.bgs.ac.uk/id/dataHolding/13607662
eng
geoscientificInformation
publication
2008-06-01
Stratigraphy
Petrology
Volcanoes
Whole rock analysis
Electron microprobes
Volcanism
Plagioclase
X ray fluorescence spectroscopy
Pyroxene
Caldera
Phenocryst
Geochemistry
Subduction
revision
2011
NERC_DDC
105.2300
105.4600
-6.0400
-6.1500
revision
2009
ID
revision
2009
IDN
creation
1979
INDONESIA [id=560000]
2017-01-11
2020-02-21
creation
2020-08-27
notApplicable
Samples were analysed for major, minor element chemistry, Department of Geology, University of Leicester (PANalytical Axios Advanced XRF spectrometer). BSE images of plagioclase (Plg) were obtained at 20KeV with 15 μ aperture: FEI Quanta 650 field emission gun (FEG) SEM, Department of Earth Sciences (ES), and a Zeiss Merlin Compact FEG-SEM, Sir William Dunn School of Pathology, University of Oxford (Ox). Phenocrysts were analysed on a FEG CAMECA SX-5 electron microprobe at ES, Ox. Major element traverses for Plg were collected at 15 kV and 20 nA, with 5 μ beam. Fe, Mg,Ti and Sr, analysed under a 40 nA beam, longer peak count times, parallel transects. Pyroxene phenocryst tranverses, and Fe/Ti oxide point analyses, obtained at 15 kV, focused beam of 20 nA. Matrix glass analysed at 15 kV with 5 μ beam of 6 nA: Jeol JXA-8200 electron Microprobe, School of Archeology, Ox.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
MS Excel
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University of Oxford
principalInvestigator
University of Plymouth
Plymouth
PL4 8AA
principalInvestigator
School of Geography, Earth and Environmental Sciences
University of Birmingham
Birmingham
B15 2TT
principalInvestigator
Department of Earth Sciences
University of Oxford
South Parks Road
Oxford
OX1 3AN
originator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100
pointOfContact
2023-01-23