Spatial variability of elements in ancient Greek (ca. 600-250 BC) silvercoins using scanning electron microscopy with energy dispersive spectrometry(SEM-EDS) and time of flight-secondary ion mass spectrometry (TOF-SIMS)

Journal article


Marjo, Christopher E., Davis, Gillan, Gong, Bin and Gore, Damian B.. (2017). Spatial variability of elements in ancient Greek (ca. 600-250 BC) silvercoins using scanning electron microscopy with energy dispersive spectrometry(SEM-EDS) and time of flight-secondary ion mass spectrometry (TOF-SIMS). Powder Diffraction. 32(S2), pp. S95-S100. https://doi.org/10.1017/S0885715617001002
AuthorsMarjo, Christopher E., Davis, Gillan, Gong, Bin and Gore, Damian B.
Abstract

Archaeometrists use a variety of analytical methods to determine trace elements in ancient Greek silver coins, for provenance studies, understanding social and technological change, and authentication. One analytical problem which is little documented is understanding the horizontal spatial heterogeneity of coin elemental composition in micro-sampled areas, which are usually assumed to be uniform. This study analysed ten ancient Greek coins representative of silver circulating in the Aegean region in the sixth to third centuries BC. Scanning electron microscopy with energy dispersive spectrometry was used to map the spatial distribution of elements on coins that were abraded to remove the patina. Time of flight-secondary ion mass spectrometry was then conducted on selected coins, mapping an area ~100 × 100 µm and depth profiling from 0 to 10 µm. These data revealed the three-dimensional elemental complexity of the coins, in particular, the heterogeneity both in the patina and beneath it. These data will guide future authentication and provenance studies of larger sample sets of ancient Greek coins including the use of line scanning for laser ablation inductively coupled plasma mass spectrometry data collection rather than spot analyses, and non-destructive analytical techniques such as X-ray fluorescence spectrometry.

Keywordsancient Greek; numismatics; patina; elemental maps
Year2017
JournalPowder Diffraction
Journal citation32 (S2), pp. S95-S100
PublisherCambridge University Press
ISSN1945-7413
Digital Object Identifier (DOI)https://doi.org/10.1017/S0885715617001002
Research or scholarlyResearch
Page rangeS95-S100
FunderAustralian Research Council (ARC)
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All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online30 Jan 2018
Publication process dates
Deposited08 Dec 2021
ARC Funded ResearchThis output has been funded, wholly or partially, under the Australian Research Council Act 2001
Grant IDARC/DP120103519
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