Dryad
Published January 21, 2025 | Version v1
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Sponge silicon isotope analyses from Triassic–Jurassic boundary samples (Levanto and Malpaso, Perú) and individual spicule analyses on modern sponges (analyzed via SIMS)

Authors/Creators

  • 1. Environmental Defense Fund
  • 2. University of Southern California
  • 3. University of Colorado Boulder
  • 4. California Institute of Technology
  • 5. University of Utah
  • 6. Pontifical Catholic University of Peru
  • 7. Natural History Museum of Los Angeles County

Description

This dataset includes silicon isotope ratios measured on sponge spicules (δ30Si) from two sections spanning the Triassic–Jurassic boundary (Levanto and Malpaso, Perú). These data are reported in Yager et al., AJS to constrain dissolved silica in the ocean and provide some of the first quantitative constraints on the global silicon cycle during the Mid-Mesozoic.

Notes

Funding provided by: National Science Foundation
ROR ID: https://ror.org/021nxhr62
Award Number: 1338329

Funding provided by: Caltech Center for Evolutionary Sciences
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Funding provided by: Elizabeth and Jerol Sonosky Fellowship of USC
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Methods

Lithified sedimentary rock samples from Levanto and Malpaso, Perú were collected from outcrops and cut into thin sections. Each thin section was examined for the presence of siliceous sponge spicules. Samples with >5% sponge spicule material were cut for one-inch round thin sections for secondary ion mass spectrometry (SIMS) analyses (n = 4 from Levanto and n = 2 from Malpaso). We also mounted and measured modern spicules for SIMS analyses and report those here (n = 4), since typically the sponge silicon isotope proxy is measured using an ICP-MS.

Files

Supplementary_Information_for_Yager_et_al_Si_isotopes_AJS.pdf

Files (212.0 kB)

Additional details

Related works

Is derived from
10.5061/dryad.dfn2z35bq (DOI)