Sulfur geochemistry of the Salitre Formation phosphorites
Description
Comma-delimited version of table containing measured δ34S of CAS, PAS, CRS, and pyrite in phosphatic and non-phosphatic microfacies of the Salitre Formation. Sample ID includes abbreviation for stratigraphic column and locality, as well as numbers indicating stratigraphic height and lateral distance in a measured section (both in meters) from a datum for the given column, or depth in a drill core (in cm) from the top of the core. Powders collected from the same hand samples (within centimeters of each other) are indicated with lowercase letters a-c. Note: Aris = Aristeia, Min = Minotaur, Cer = Cerberus, FuroV = CBPM Core 5, and FuroX = CBPM Core 10. Locality/Section names, stratigraphic columns, and geographic location are provided in Sanders and Grotzinger (2021), Sanders et al. (2023), and Sanders et al. (submitted). Microfacies A = carbonate-cemented grainstone, B = carbonate-cemented grainstone adjacent to phospatic digitate stromatolite buildup, C = carbonate-cemented grainy inter-stromatolite fill, D = carbonate-cemented laminated mudstone, E = carbonate-cemented stromatolite laminae, and F = CFA-cemented stromatolite laminae. CAS = trace structural sulfate in the lattice of the indicated carbonate mineral(s), collected via protocols for trace sulfate extraction and purification, and measured via ICP-MS. PAS = trace structural sulfate in the lattice of the indicated phosphate mineral, collected via protocols for bulk phosphate-associated sulfate extraction, and measured via EA-IRMS. CRS = chromium-reducible sulfur, extracted and fixed as Ag2S from acid-insoluble residues, representative of sulfur in the lattice of pyrite measured via EA-IRMS. “Pyrite” and “pyrite/marcasite/pyrrhotite” refer to SIMS measurement of structural sulfur in individual crystals or aggregates of crystals. ‰ is expressed with respect to Vienna Canyon Diablo Troilite (VCDT). Works Cited: 1. Sanders C. B., Eiler J. C. and Grotzinger J. P. (2023) Paragenesis of an Ediacaran carbonate-platform phosphorite: Constraints from optical petrography and texture-specific clumped isotope paleothermometry. Sediment. Geol. 444, 106316. Available at: https://doi.org/10.1016/j.sedgeo.2022.106316. 2. Sanders C. and Grotzinger J. (2021) Sedimentological and stratigraphic constraints on depositional environment for Ediacaran carbonate rocks of the São Francisco Craton: Implications for phosphogenesis and paleoecology. Precambrian Res. 363, 106328. Available at: https://doi.org/10.1016/j.precamres.2021.106328. 3. Sanders C., Present T., Marroquin S. and Grotzinger J. (submitted) Sulfur geochemistry of the Salitre Formation phosphorites: Implications for the role of microbial ecology, sulfur cycling in phosphogenesis on an Ediacaran carbonate platform. Geochim. et Cosmochim. Acta.