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3 results for “geochemical analysis”
Insights into the operation of the solid Earth system from analysis of compiled geochemical data (Video)
<p>This is the first session video recording of the Goldschmidt 2020 Virtual Workshop: Earth Science meets Data Science - Services & Systems, Policies & Procedures, Tools & Techniques for Geochemistry. Moderated by Kerstin Lehnert (Columbia University)</p>
Geochemical Analysis of Obsidian Artifacts from the Majes Valley, Arequipa Peru using Portable-XRF
<p>In 2018, geochemical analysis was conducted using portable-XRF of 303 obsidian artifacts from four archaeological sites in the Majes Valley, Arequipa Peru. The four sites correspond to the Middle Horizon period (AD 600-1000) and include Santa Rosa II, La Angostura, El Tambo, and Pakaytambo. Comparisons to geologic obsidian samples allowed for the positive identification of artifacts to their corresponding geologic source. Results indicate the use of six discrete obsidian sources from the south-central Andes. Three of the sources are found relatively close to the study area and include Alca-1, Alca-4, and Anillo. A smaller quantity of artifacts was characterized as Quispisisa, Jampatilla, and Lisahuacho found to the north of Arequipa in the neighboring departments of Ayacucho and Apurimac.</p> <p>This data is a component of the PhD dissertation entitled <em>Networks of Empire: The Role of Infrastructure in Wari State Expansion in Arequipa, Peru (AD 600-1000)</em> by David A. Reid (University of Illinois at Chicago).</p> <p>This research was conducted in collaboration with Patrick Ryan Williams at The Field Museum of Natural History and the institution’s Elemental Analysis Facility.</p> <p>Funding was provided by the National Science Foundation’s Doctoral Dissertation Research Improvement Award (#1854651).</p>
Grain size and geochemeical analysis in the Ghar El Melh Lagoon and the Medjerda River watershed
<p>Two piston cores were manually collected in the Ghar El Melh lagoon. These cores are 126 cm (GEM4) and 98 cm (GEM3) in length. A very high-resolution sedimentological analysis (granulometric and geochemical) was applied to these cores. Moreover, 29 surface sediment samples were collected from present-day soil horizons from the Medejerda watershed to the littoral area (beaches and dunes) to assess the origin and all sources of the lagoon sediment arriving in the study area. In the laboratory, granulometric and geochemical analyses were performed on these surface samples. The particle sizes obtained are classified according to Folk and Ward (1957) into three categories (clay Φ <2µm, silt 2µm <Φ < 63µm and sand Φ > 63µm).<br> </p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.