Torvinen (2018) - EPMA-WDS raw data for clay samples

Creator(s): Andrea Torvinen

Year: 2018

Summary

These elemental data were collected using the Quantitative Wavelength Dispersive Spectroscopy technique with the JEOL JXA-8530F Electron Probe Microanalyzer (EPMA-WDS) at the John M. Crowley Center for High Resolution Electron Microscopy at Arizona State University supervised by Dr. Axel Wittmann.

Based on the methodology developed by Abbott and Lack (2013), a series of five assays were run per sample at 300X magnification in a relatively inclusion free area of clay matrix (spot area = 20 um) and the weight percentages of eight elements (K, Al, Na, Ti, Ca, Si, Mg, and Fe) were measured using a set of five wavelength-dispersive spectrometers. Data on six minor elements (Mn, Cr, S, Ni, Co, and O) were also collected but not analyzed because the precision of their measurement is typically insufficient for statistical analysis. Precision of the results was regularly checked against known abundances of these elements in standard reference materials using the same analytical protocol. The elemental measurements for each assay were standardized using the JEOL system software and output for analysis.

Abbott, David R. and Andrew D. Lack (2013) Prehistoric Warfare in Central Arizona, USA: Assessing Its Scale with Ceramic Chemistry. Geoarchaeology 28(2):147-169.

Cite this Record

Torvinen (2018) - EPMA-WDS raw data for clay samples. Andrea Torvinen. 2018 ( tDAR id: 458203) ; doi:10.6067/XCV8458203

Data Set Structure

Measurement Column
Count Column
Coded Column
Filename Column
Integration Column (has Ontology)

Table Information: Torvinen (2018) - EPMA-WDS clay data

Column Name Data Type Type Category Coding Sheet Ontology Search
TiO2 CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
FeO CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
TiO2 measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
NiO CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
BIGINT  Uncoded Value uncategorized none none true
SO3 CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
BIGINT  Uncoded Value uncategorized none none true
SiO2 CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
MgO CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
Na2O CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
TOTAL total oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
MnO CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
K2O CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
MnO measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
FeO measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
Date date the sample was analyzed
DATE  Uncoded Value Other : Date Created none none true
MgO measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
Na2O measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
O measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
NiO measurement units are oxide-weight per cent
BIGINT  Measurement (other) Ceramic : Composition none none true
SAMPLE sample number
VARCHAR  Uncoded Value Other : ID none none true
CoO CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
BIGINT  Uncoded Value uncategorized none none true
Cr2O3 CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
CaO CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
Al2O3 CDL99 detection limits based on counting statistics at the 99th percentile confidence limit in oxide weight-percent
DOUBLE  Uncoded Value uncategorized none none true
Column #19 left intentionally blank
BIGINT  Uncoded Value uncategorized none none true
CoO measurement units are oxide-weight per cent
BIGINT  Measurement (other) Ceramic : Composition none none true
Cr2O3 measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
CaO measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
Al2O3 measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
K2O measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
SO3 measurement units are oxide-weight per cent
BIGINT  Measurement (other) Ceramic : Composition none none true
SiO2 measurement units are oxide-weight per cent
DOUBLE  Measurement (other) Ceramic : Composition none none true
Column #2 VARCHAR  Uncoded Value uncategorized none none true

Keywords

Culture
Mesoamerican/Noroeste de México

Material
Ceramic • Dating Sample

Site Name
La Quemada

Site Type
Domestic Structure or Architectural Complex

Investigation Types
Archaeological Overview • Data Recovery / Excavation

General
Electron Microprobe Analysis • Electron Probe Microanalyzer - Wavelength Dispersive Spectroscopy (EPMA-WDS)

Geographic Keywords
Malpaso Valley • Northwest Mexico • Zacatecas (State / Territory) • Zacatecas region

Temporal Keywords
Classic • Epiclassic • Postclassic

Temporal Coverage

Calendar Date: 600 to 800 (CE)

Spatial Coverage

min long: -105.941; min lat: 20.633 ; max long: -100.865; max lat: 24.807 ;

Individual & Institutional Roles

Contact(s): Andrea Torvinen

Principal Investigator(s): Andrea Torvinen; Ben Nelson

Source Collections

La Quemada-Malpaso Valley Archaeological Project ceramic assemblage

File Information

  Name Size Creation Date Date Uploaded Access
Torvinen--2018----EPMA-WDS-clay-data.xlsx 94.31kb Oct 2, 2020 5:18:54 PM Public
  • Translated version Torvinen--2018----EPMA-WDS-clay-data_translated.xlsx (72.95kb)
    Data column(s) in this dataset have been associated with coding sheet(s) and translated: