Mineralogical and magnetic characterization of Olmec ilmenite multi-perforated artifacts and inferences on source provenance

Alva‐Valdivia, Luis M.; Cyphers, Ann; Rivas-Sánchez, María de la Luz; Agarwal, Amar; Zurita-Noguera, Judith; Urrutia‐Fucugauchi, J.

doi:10.1127/ejm/2017/0029-2654

Cited by 8 publications

(1 citation statement)

References 12 publications

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“…Rock magnetic studies have been successfully applied in the past for solving archaeological questions, such as the provenance of archeological artifacts (e.g. Alva-Valdivia et al, 2017) or Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico using the secondary magnetic component to determine the emplacement temperature of volcanic material and the probable date of the eruption (e.g. Alva-Valdivia et al, 2019, among others) or determine the emplacement temperature that could be related to the composite thermal history of the lithic clasts incorporated in a pyroclastic flow (e.g.…”

Section: Introductionmentioning

confidence: 99%

Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico

Hernández‐Cardona¹,

Alva‐Valdivia²,

Ochoa³

et al. 2019

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We report a magnetic study of two preceramic hearths located at the southern region of Mexico City. Thermal demagnetization was applied between 200 to 540 °C to define the remanent magnetization components. The maximum unblocking temperature of the secondary magnetic component reached due to the last heating was identified in most samples. They were used to develop thermomagnetic anomaly source maps. The direction of this component was used to place the blocks to their last cooling spot and configurate a real and primal magnetic anomaly map produced by the thermoremanent magnetization acquired. A protocol to relocate blocks frame is proposed using geomagnetic secular variation curves. The thermomagnetic mapping revealed the position and temperature (220 to 460 °C) of the last heat sources. The distribution of these sources allowed to model an extensional zone of benefit and probable uses of the hearths.

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Section: Introductionmentioning

confidence: 99%

Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico

Hernández‐Cardona¹,

Alva‐Valdivia²,

Ochoa³

et al. 2019

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Magnetic Susceptibility

Alva‐Valdivia

Agarwal

Cruz-y-Cruz

2018

The Encyclopedia of Archaeological Sciences

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Magnetic susceptibility is an extremely sensitive indicator of the magnetic minerals present in rock, archaeological artifacts, and environmental samples, because any slight variation in magnetic mineralogy is usually reflected by a profound change in susceptibility. Recently, the temperature variation of magnetic susceptibility monitoring has been very useful to: (1) identify the type and chemical composition of ferromagnetic minerals based on their characteristic temperatures (e.g., Curie temperature, Verwey transition); (2) resolve the ferromagnetic versus paramagnetic contribution to magnetic susceptibility; and (3) evaluate alteration during thermal events. Furthermore, dependence of magnetic susceptibility on frequencies is indicative of the possible presence of ultrafine magnetic particles in rocks, ceramics, and soils, which, in turn, may be interpreted in terms of genesis or environmental changes.

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In Search of Middle Preclassic Lowland Maya Ideologies

Rice

2020

J Archaeol Res

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Mineralogical and magnetic characterization of Olmec ilmenite multi-perforated artifacts and inferences on source provenance

Cited by 8 publications

References 12 publications

Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico

Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico

Magnetic Susceptibility

In Search of Middle Preclassic Lowland Maya Ideologies

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