Metadata Overview for Tephra "CH22-NL-T2"

Below is all the metadata supplied for this sample. Download basic metadata.

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General
IGSN:10273/GF1211S--E
Related Resource:Is Part Of Data Paper "https://tiendadigital.sernageomin.cl/es/geologia-basica/3078-hoja-aguas-blancas-region-de-antofagasta.html" (URL)
Lab IDs:CH22-NL-T2_top, CH22-NL-T2_bottom, CH22-NL-T2_1, CH22-NL-T2_2, MAB-663
Comment:CH22-NL-T2 resamples tephra MAB-663 (5.5±1.0 Ma) described in Marinovic et al. (1995).
Additional File:sample_7_supplemental.zip (3.7 MB)
Responsible Party
Creators:Niklas Leicher (n.leicher@uni-koeln.de), N. Marinovic (unknown@unknown.com)
Collection Details
Collection Site:CH22-NL-T2
Sample Recovery Technique:Manual
Sample Collection Date:27.09.2022
Sampling Method:Channel through selected sub-interval of stratum or layer
Sample Details
Resource Type:Individual Sample
Sample Access:Accessible
Material:Tephra
Depositional Process:Other Depositional or Emplacement Type
Subsample Count:2
Subsample Info:One sample taken from basal (CH22-NL-T2_1) and one from top part (CH22-NL-T2_2) of tephra layer.
Lab Split Info:Wet sample sieving using sieve size fractions of 0.063 and 0.250 mm Frantz Magnetic separation 0.8 + 2.2 A
Analysis Details
Major/Minor Element Analysis Method:EPMA-WDS, glass
Trace Element Analysis Method:LA-ICP-MS, glass
Isotope Analysis Method:None
Dating Method:K/Ar, Mica
Physical Properties
Physical Layer Property 1:
Layer Continuitycontinous
Thickness70 cm - 100 cm
Colorwhite
Top Contact TypeCovered
Bottom Contact TypeSharp
Host Sediment MixingNo
Evidence of ReworkingNo
Internal BeddingMassive
Sorting QualityUnsorted
Internal GradingNot graded
Field Alterationnot identified
Componentsglass, biotites
Layer CommentsAsh in channel of alluvial fan. Sharp basal contact, top contact covered in alluvial deposits. Very pure ash, whitish, some biotites.
Physical Microanalytical Property 1:
Lab IDCH22-NL-T2
Microscoped Fractionsmear slide
Glass Fragment TypesGlass shards, Micropumice
Glass Shard MorphologiesBubble wall (bw), Bubble wall junction (bwj), Ribbed
Light Microscope Images AvailableNo
BSE Images AvailableNo
Geochemistry
TAS Classification:Rhyolite
WDS-EDS Analysis:WDS-EDS .csv file
LA-ICP-MS Analysis:LA-ICP-MS .csv file
Chronology
Chronological Analysis 1:
This is the best age estimate for this sample.
Dating MethodK/Ar, Mica (Stepwise Heating)
LabSernageomin
Age Range4.5 - 6.5 Ma
Best Age Estimate5.5 Ma (Uncertainty: 1)
Age Calculation-
Uncertainty Type-
Xenocryst PresenceNot determined
Stratigraphy
Erathem:Cenozoic
System:Neogene
Series:Miocene
Stage:Messinian
Age Range:4.5 - 6.5 Ma
Tephra Correlation
Tephra Correlation:CG_10
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