Volcanic ash provenance from zircon dust with an application to Maya pottery

Abstract

Volcanic ash provenance from zircon dust with an application to Maya pottery Email alerting services articles cite this article to receive free e-mail alerts when new www.gsapubs.org/cgi/alerts click Subscribe to subscribe to Geology www.gsapubs.org/subscriptions/ click Permission request to contact GSA http://www.geosociety.org/pubs/copyrt.htm#gsa click official positions of the Society. citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect presentation of diverse opinions and positions by scientists worldwide, regardless of their race, includes a reference to the article's full citation. GSA provides this and other forums for the the abstracts only of their articles on their own or their organization's Web site providing the posting to further education and science. This file may not be posted to any Web site, but authors may post works and to make unlimited copies of items in GSA's journals for noncommercial use in classrooms requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in subsequent their employment. Individual scientists are hereby granted permission, without fees or further

Using palaeoenvironmental DNA to reconstruct past environments: progress and prospects

“…Additional control samples should be taken for plant macrofossil and pollen analysis, and OSL and 14 C dating (if in range), or other methods where appropriate, such as (U−Th)/He or U−Pb dating (e.g. Danišík et al ., ; Sirocko et al ., ; Coffey et al ., ), to help assess the stratigraphic reliability of PalEnDNA.…”

Zircon and Melt Extraction From a Long‐Lived and Vertically Extensive Magma System Underneath Ilopango Caldera (El Salvador)

“…Recent Bouguer gravity geophysical investigations suggest that magma ascent and accumulation beneath Ilopango caldera occurs within a shallow, highly fractured, and hydrothermally altered plumbing system that is controlled by a complex array of dextral strike‐slip faults with dominant E‐W strike of the El Salvador Fault Zone (ESFZ; Corti et al., 2005; Saxby et al., 2016). In a first reconnaissance study of TBJ ash in archeological materials, 238 U‐ 230 Th zircon dating from TBJ pumice clasts suggested timescales of <30 ka for magma storage prior to eruption (Coffey et al., 2014), whereas 238 U‐ 230 Th mineral‐whole‐rock/glass isochrons (e.g., magnetite, amphibole, and pyroxene) indicated much shorter timescales of <10,000 years for crystallization and magmatic differentiation (Garrison et al., 2012). Magma genesis at Ilopango caldera has been modeled by pure fractional crystallization of parental basaltic andesite, but the same study documented differences in whole‐rock 143 Nd/ 144 Nd, 87 Sr/ 86 Sr, and 207 Pb/ 206 Pb isotope values that indicate contributions from heterogeneous magmatic sources and/or country rocks (Garrison et al., 2012).…”

Reworked volcaniclastic deposits from the Usumacinta river, Mexico: A serendipitous source of volcanic glass in Maya ceramics

“…However, specific analyses of the temper particles are scarce. In the last two decades, with the development of the electron microprobe, automated scanning electronic microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) analysis (QEMSCAN R ; Knappett et al, 2011), inductively coupled plasma mass spectrometry (ICP-MS), and secondary ion mass spectrometry (SIMS) techniques (Catlin, 2008;Coffey et al 2014;Ford & Spera, 2007), the geochemical signatures of specific minerals in the ceramics and in the raw materials (mineralogy of soils or sediments)…”

“…In the Maya Lowlands, several models have been proposed to explain the “problematic” presence of volcanic ash temper (Coffey et al. ). One of them suggests a local source, originating from discontinuous volcanic ash fall deposits.…”