{"title":"Discussion on the studies of position-specific carbon isotopes of propane by Li et al. (2018), Zhang et al. (2022) and Shuai et al. (2023)","authors":"Juske Horita","doi":"10.1016/j.orggeochem.2024.104795","DOIUrl":null,"url":null,"abstract":"<div><p>In a series of recent publications in <em>Organic Geochemistry</em> and elsewhere, investigators from State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry and their collaborators have reported position-specific δ<sup>13</sup>C of propane obtained from natural reservoirs and pyrolysis experiments. Based solely on the very negative Δ<sub>C-T</sub> values (δ<sup>13</sup>C<sub>center</sub> – δ<sup>13</sup>C<sub>terminal</sub>), ranging from −7 to −10 ‰, they advocated for abiogenic origins of the propanes from sedimentary settings (shale and coal deposits). However, they never demonstrated accuracy of the data and it is likely that correct Δ<sub>C-T</sub> values for these propanes are close to zero ‰. Therefore, their discussion and interpretation in terms of geochemical processes, including a putative abiogenic origin, are not substantiated.</p></div>","PeriodicalId":400,"journal":{"name":"Organic Geochemistry","volume":"192 ","pages":"Article 104795"},"PeriodicalIF":2.6000,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Geochemistry","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0146638024000603","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
In a series of recent publications in Organic Geochemistry and elsewhere, investigators from State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry and their collaborators have reported position-specific δ13C of propane obtained from natural reservoirs and pyrolysis experiments. Based solely on the very negative ΔC-T values (δ13Ccenter – δ13Cterminal), ranging from −7 to −10 ‰, they advocated for abiogenic origins of the propanes from sedimentary settings (shale and coal deposits). However, they never demonstrated accuracy of the data and it is likely that correct ΔC-T values for these propanes are close to zero ‰. Therefore, their discussion and interpretation in terms of geochemical processes, including a putative abiogenic origin, are not substantiated.
期刊介绍：
Organic Geochemistry serves as the only dedicated medium for the publication of peer-reviewed research on all phases of geochemistry in which organic compounds play a major role. The Editors welcome contributions covering a wide spectrum of subjects in the geosciences broadly based on organic chemistry (including molecular and isotopic geochemistry), and involving geology, biogeochemistry, environmental geochemistry, chemical oceanography and hydrology.
The scope of the journal includes research involving petroleum (including natural gas), coal, organic matter in the aqueous environment and recent sediments, organic-rich rocks and soils and the role of organics in the geochemical cycling of the elements.
Sedimentological, paleontological and organic petrographic studies will also be considered for publication, provided that they are geochemically oriented. Papers cover the full range of research activities in organic geochemistry, and include comprehensive review articles, technical communications, discussion/reply correspondence and short technical notes. Peer-reviews organised through three Chief Editors and a staff of Associate Editors, are conducted by well known, respected scientists from academia, government and industry. The journal also publishes reviews of books, announcements of important conferences and meetings and other matters of direct interest to the organic geochemical community.
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