Semi-supervised classification of distribution mixtures to determine the sources of obsidian artifacts at Izapa, Chiapas;
Por:
López García P.A., Argote Espino D.L., Uriarte Torres A.J., Pérez Alcántara I.A., Nava G.C.
Publicada:
1 ene 2024
Resumen:
The chemical characterization of materials recovered from archaeological sites has been used to relate artifacts to their respective sources of raw material. For this, conventional methods of classical statistics are commonly used, such as bivariate graphs, cluster analysis and linear data transformations. Those who have applied these methods claim to have a high degree of confidence in the correct assignment of materials to their respective sources. However, if empirical data deviate from theoretical assumptions, classical statistical techniques can produce incorrect assignments. In this paper, we propose a semi-supervised learning procedure using clustering and classification based on models of mixtures of multivariate asymmetric exponential power distributions. The objective is to trace the origin and provenance of obsidian archaeological materials from the archaeological zone of Izapa, Chiapas, significantly optimizing the result of the correct allocation of unlabeled data by employing only limited supervision in the form of labeled instances. The effectiveness of the proposed method was evaluated by a controlled experiment using data from a set of geological samples from obsidian deposits. Subsequently, the method was applied to analyze a set of obsidian artifacts collected in excavations within Izapa dated for the Classic period. In both cases, well-defined classifications were obtained that, in the case of Izapa, allowed to determine the consumption of materials from Guatemalan sources, as well as some relationship with sources from western and central Mexico. © (2024), (Boletin de la Sociedad Geologica Mexicana). All rights reserved.
Filiaciones:
López García P.A.:
Posgrado de Arqueología, Escuela Nacional de Antropología e Historia, Periférico Sur y Zapote s/n, Colonia Isidro Fabela, Tlalpan, CDMX, 14030, Mexico
Argote Espino D.L.:
Dirección de Estudios Arqueológicos, Instituto Nacional de Antropología e Historia, Calle Tacuba 76 4to piso, Colonia Centro, Cuauhtémoc, CDMX, 06000, Mexico
Uriarte Torres A.J.:
Dirección de Estudios Arqueológicos, Instituto Nacional de Antropología e Historia, Calle Tacuba 76 4to piso, Colonia Centro, Cuauhtémoc, CDMX, 06000, Mexico
Pérez Alcántara I.A.:
Centro INAH San Luis Potosí, Arista No. 933, Colonia Tequisquiapan, San Luis Potosí, San Luis Potosí, 78230, Mexico
Nava G.C.:
Instituto de Geofísica, Universidad Nacional Autónoma de México, Circuito de Investigación, Ciudad Universitaria, Coyoacán, CDMX, 04510, Mexico
gold, All Open Access; Gold Open Access
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