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Article . 2021
License: CC BY
ETH Zürich Research Collection
Article . 2021
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Trace-elemental and multi-isotopic (Sr-Nd-Pb) discrimination of jade in the circum-Caribbean: Implications for pre-colonial inter-island exchange networks

implications for pre-colonial inter-island exchange networks
Authors: Alice C.S. Knaf; Habiba; Termeh Shafie; Janne M. Koornneef; A. T. Hertwig; Juan Cárdenas-Párraga; Antonio García-Casco; +7 Authors

Trace-elemental and multi-isotopic (Sr-Nd-Pb) discrimination of jade in the circum-Caribbean: Implications for pre-colonial inter-island exchange networks

Abstract

Dense and strong, hydrothermal-metasomatic jadeitite and jadeite-omphacite rocks were used as tools and adornments throughout the wider Caribbean since initial inhabitation. Regionally, rich sources of jadeitite and jadeite-omphacite jade are known only in Guatemala (north and south of the Motagua Fault Zone), eastern Cuba and the northern Dominican Republic, establishing that humans transported jadeitic material over vast distances. This study validates that geochemical fingerprinting is a viable provenance method for Caribbean pre-colonial jadeitic lithologies. An assemblage of 101 source rocks has been characterised for trace element and combined Sr-Nd-Pb isotope compositions. Four statistical approaches (Principal Component Analysis, t-Distributed Stochastic Neighbour Embedding, Decision Tree, and Multiclass Regression) were assessed, employing source-distinct trace element ratios. A multiclass regression technique based on trace element ratios of immobile high field strength, light to medium rare earth and fluid-mobile, large-ion-lithophile elements is shown to be most effective in discriminating the four source regions. Ninety-one % of the Guatemalan samples can be discriminated from the Dominican and Cuban sources using La/Th, Zr/Hf and Y/Th ratios. Jadeitic rocks cropping out in the Dominican Republic can be distinguished from Cuban jades employing Er/Yb, Nb/Ta and Ba/Rb ratios with 71% certainty. Furthermore, the two Guatemala sources, north and south of the Motagua Fault Zone, can be discriminated by using (among others) Zr/Hf, Ta/Th, La/Sm and Dy/Y ratios with an 89% success rate. This raises the possibility of determining, in detail, former trading and mobility networks between different islands and the Meso- and Central American mainland within the Greater Caribbean. The provenance technique was applied to 19 pre-colonial jade celts excavated from the Late Ceramic Age Playa Grande archaeological site in the northern Dominican Republic. Three artefacts are discriminated as derived from the Guatemalan source, indicating that, despite a source of jade within 25 km, material was traded from Guatemala. The presence of Guatemalan jade in the Playa Grande lithic assemblage provides further evidence of large scale (>3000 km), regional trading and indigenous knowledge transfer networks.

Journal of Archaeological Science, 135

ISSN:0305-4403

ISSN:1095-9238

Countries
United Kingdom, Spain, Switzerland, Spain, Netherlands
Subjects by Vocabulary

Microsoft Academic Graph classification: Provenance Lithology Rare earth Geochemistry Assemblage (archaeology) Trace element JADE (particle detector) Source rock Central american Geology

Keywords

Archeology, SDG 16 - Peace, Geochemical characterisation, Jade, Provenance studies, Source discrimination, Circum-Caribbean, SDG 16 - Peace, Justice and Strong Institutions, SDG 10 - Reduced Inequalities, Indigenous mobility networks, /dk/atira/pure/sustainabledevelopmentgoals/peace_justice_and_strong_institutions, Jade; Circum-Caribbean; Source discrimination; Geochemical characterisation; Statistical approaches; Provenance studies; Indigenous mobility networks, Justice and Strong Institutions, /dk/atira/pure/sustainabledevelopmentgoals/reduced_inequalities, Statistical approaches

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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