Sun Yadong , Lai Xulong , Jiang Haishui , Luo Genming , Sun Si , Yan Chunbo , Paul B Wignall
{"title":"Guadalupian (Middle Permian) Conodont Faunas at Shangsi Section, Northeast Sichuan Province","authors":"Sun Yadong , Lai Xulong , Jiang Haishui , Luo Genming , Sun Si , Yan Chunbo , Paul B Wignall","doi":"10.1016/S1002-0705(08)60050-3","DOIUrl":null,"url":null,"abstract":"<div><p>This study recovered the Guadalupian conodont faunas from Shangsi Section in Northeast Sichuan. Four genera and nine species were identified, and three conodont zones were recognized and established; they include <em>Jinogondolella nankingensis</em> Zone, <em>J. aserrata</em> Zone, and <em>J. postserrata</em> Zone. The Roadian and Wordian boundary is set in the interval 5 m from the top of Bed 86 by the first appearance of the conodont <em>J. aserrata</em>. The Wordian and Capitanian boundary is set in the interval 2.3 m from the top of the Bed 95 by the first appearance of <em>J. postserrata</em>. Most of the specimens demonstrated low color alteration index (CAI) as 1.5–3, indicating that most part of the Maokou Formation may have the suitable thermal conditions for the formation of oil source rocks.</p></div>","PeriodicalId":100762,"journal":{"name":"Journal of China University of Geosciences","volume":"19 5","pages":"Pages 451-460"},"PeriodicalIF":0.0000,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1002-0705(08)60050-3","citationCount":"28","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of China University of Geosciences","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1002070508600503","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 28
Abstract
This study recovered the Guadalupian conodont faunas from Shangsi Section in Northeast Sichuan. Four genera and nine species were identified, and three conodont zones were recognized and established; they include Jinogondolella nankingensis Zone, J. aserrata Zone, and J. postserrata Zone. The Roadian and Wordian boundary is set in the interval 5 m from the top of Bed 86 by the first appearance of the conodont J. aserrata. The Wordian and Capitanian boundary is set in the interval 2.3 m from the top of the Bed 95 by the first appearance of J. postserrata. Most of the specimens demonstrated low color alteration index (CAI) as 1.5–3, indicating that most part of the Maokou Formation may have the suitable thermal conditions for the formation of oil source rocks.
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