Scans/README.md

In mtb-archaeology/lbnl.xrf.data: LBNL XRF Data

LBNL Geochemical data for Andes obsidian sources and artifacts

Scanned prints of XRF data for South American obsidian artifacts

Provided by N. Tripcevich and R. Burger

Scanned: July/August, 2020 MTB

Files contained in this directory are scans of the dot-matrix prints produced by the Archaeometry Group at the Lawrence Berkeley National Laboratory and sent to Richard Burger (Yale University). The printouts contain data produced by X-ray fluorescence spectrometry on obsidian specimens from archaeological sites in South America. These data are discussed in several publications by Burger and colleagues, including:

• Burger, R. and F. Asaro (1977) Trace element analysis of obsidian artifacts from the Andes: new perspectives on pre-hispanic economic interaction in Peru and Bolivia. Report number: LBL-6343
• Burger, R. and F. Asaro (1993) La distribución y procedencia de artefactos de obsidiana durante el periodo inicial y horizonte temprano. In "Emergencia de la civilizacion en los Andes: ensayos de interpretación", edited by R. L. Burger, pp. 189-264. UNMSM, Lima.
• Burger, R., F. Asaro, and H. Michel. (1984) Appendix E: The source of the obsidian artifacts at Chavin de Huantar. In "The Prehistoric Occupation of Chavin de Huantar, Peru," R.L. Burger, pp. 263-270.

File names consist of the XRF "Run" number assigned by LBNL, with text designating whether the output if from the mid-Z assay (Fe, Cr, Mn, Ti, Ca, V, Zn, Cu, Pb, Rb, Sr, Y, Zr, Nb, Mo, Ni, K) or the high-Z assay (Sn, Ba, La, Ce). Calculated elemental abundances are provided for each sample in a given assay. Each page represents the calculated elemental abundance. In order to properly scale these abundances to parts per million, they must be multiplied by one million x ten to the power of the exponent given at the end of each line of output (e.g., 1,000,000 X 10 ^ -5; 1,000,000 X 10 ^ -4). Corresponding spreadsheets for each assay combine both the mid- and high-Z elements, and were produced by manually transcribing the data as given on the printouts and performing the scaling as indicated. Thus, elemental abundances listed in the spreadsheets are given in PPM.

mtb-archaeology/lbnl.xrf.data documentation built on April 27, 2022, 3:36 a.m.