This study recovered the Guadalupian conodont faunas from Shangsi （上寺） Section in Northeast Sichuan （四川）. Four genera and nine species were identified, and three conodont zones were recognized and established;...This study recovered the Guadalupian conodont faunas from Shangsi （上寺） Section in Northeast Sichuan （四川）. 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 ofJ. postserrata. Most of the specimens demonstrated low color alteration index （CAI） as 1.5-3, indicating that most part of the Maokou （茅口） Formation may have the suitable thermal conditions for the formation of oil source rocks.展开更多
Ⅰ. INTRODUCTIONThe Permian-Triassic section in Guangyuan County of Sichuan Province was chosen for a magnetostratigraphic study. Previously, the section has been studied in detail palaeontologically and an iridium an...Ⅰ. INTRODUCTIONThe Permian-Triassic section in Guangyuan County of Sichuan Province was chosen for a magnetostratigraphic study. Previously, the section has been studied in detail palaeontologically and an iridium anomaly has been detected at the Permian-Triassic boundary. Field work and paleomagnetic sampling were carried out in October 1984. All measurements and experiments were done in the paleomagnetic laboratory of the Institute of Geophysics, ETH Zürich in 1985.展开更多
基金supported by the SINOPEC project (G0800-06-ZS-319)the National Natural Science Foundation of China (No. 40621002)+1 种基金the Program for Changjiang Scholars and Innovative Research Team (IRT0546)the "111" Project (No. B08030)
文摘This study recovered the Guadalupian conodont faunas from Shangsi （上寺） Section in Northeast Sichuan （四川）. 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 ofJ. postserrata. Most of the specimens demonstrated low color alteration index （CAI） as 1.5-3, indicating that most part of the Maokou （茅口） Formation may have the suitable thermal conditions for the formation of oil source rocks.
文摘Ⅰ. INTRODUCTIONThe Permian-Triassic section in Guangyuan County of Sichuan Province was chosen for a magnetostratigraphic study. Previously, the section has been studied in detail palaeontologically and an iridium anomaly has been detected at the Permian-Triassic boundary. Field work and paleomagnetic sampling were carried out in October 1984. All measurements and experiments were done in the paleomagnetic laboratory of the Institute of Geophysics, ETH Zürich in 1985.
