Deconvolving microbial and environmental controls on marine sedimentary pyrite sulfur isotope ratios.

التفاصيل البيبلوغرافية
العنوان:	Deconvolving microbial and environmental controls on marine sedimentary pyrite sulfur isotope ratios.
المؤلفون:	Bryant RN; Department of Earth & Planetary Sciences, Washington University in St. Louis, St. Louis, MO, USA.; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, USA., Houghton JL; Department of Earth & Planetary Sciences, Washington University in St. Louis, St. Louis, MO, USA., Jones C; Department of Earth & Planetary Sciences, Washington University in St. Louis, St. Louis, MO, USA., Pasquier V; Department of Earth & Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel., Halevy I; Department of Earth & Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel., Fike DA; Department of Earth & Planetary Sciences, Washington University in St. Louis, St. Louis, MO, USA.
المصدر:	Science (New York, N.Y.) [Science] 2023 Nov 24; Vol. 382 (6673), pp. 912-915. Date of Electronic Publication: 2023 Nov 23.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 0404511 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-9203 (Electronic) Linking ISSN: 00368075 NLM ISO Abbreviation: Science Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة:	Publication: : Washington, DC : American Association for the Advancement of Science Original Publication: New York, N.Y. : [s.n.] 1880-
مستخلص:	Reconstructions of past environmental conditions and biological activity are often based on bulk stable isotope proxies, which are inherently open to multiple interpretations. This is particularly true of the sulfur isotopic composition of sedimentary pyrite (δ ³⁴ S pyr ), which is used to reconstruct ocean-atmosphere oxidation state and track the evolution of several microbial metabolic pathways. We present a microanalytical approach to deconvolving the multiple signals that influence δ ³⁴ S pyr , yielding both the unambiguous determination of microbial isotopic fractionation (ε mic ) and new information about depositional conditions. We applied this approach to recent glacial-interglacial sediments, which feature over 70‰ variations in bulk δ ³⁴ S pyr across these environmental transitions. Despite profound environmental change, ε mic remained essentially invariant throughout this interval and the observed range in δ ³⁴ S pyr was instead driven by climate-induced variations in sedimentation.
تواريخ الأحداث:	Date Created: 20231123 Date Completed: 20231205 Latest Revision: 20231205
رمز التحديث:	20240628
DOI:	10.1126/science.adg6103
PMID:	37995248
قاعدة البيانات:	MEDLINE

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تدمد:	1095-9203
DOI:	10.1126/science.adg6103