JpGU Meeting 2019
Session outline| Biogeosciences (B) | ||
|---|---|---|
| Session Sub-category | Complex & General(CG) | |
| Session ID | B-CG08 | |
| Title | Phanerozoic biodiversity change: Extinction and diversification | |
| Short Title | Phanerozoic biodiversity | |
| Main Convener | Name | Yukio Isozaki |
| Affiliation | Department of Earth Science and Astronomy, Multi-disciplinary Sciences - General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo | |
| Co-Convener 1 | Name | Yusuke Sawaki |
| Affiliation | The University of Tokyo | |
| Session Language | J | |
| Scope | Phanerozoic biodiversity is the consequence of repeated extinctions and following diversifications in the past, which were caused by large-scale environmental changes, in particular, by extremely rapid and drastic forcing that changed the environments of the biosphere. Irreversible and episodic changes in material cycling on the planet and influences of severe galactic cosmic radiation enhanced by encounter with dark cloud are nominated as major driving mechanisms for the alleged rapid, large-scale environmental perturbations. The biodiversity change in the fossiliferous Phanerozoic record is characterized by 5 major mass extinctions within the long-term trend of diversity increase. Nonetheless, each extinction event has been explained rather in ad hoc manner, without any universal explanation. Therefore, ultimate triggers that caused the Phanerozoic biodiversity still remain as unsolved issues. This session discusses the ancient environmental changes related to Phanerozoic biodiversity under a new light of the recent progress in geology. | |
| Presentation Format | Oral and Poster presentation | |
| Invited Authors | Dongjing Fu (Northwest University, Xian 710069, China) Xingliang Zhang (State Key Laboratory of Continental Dynamics, Shaanxi Key Laboratory of Early Life and Environments and Department of Geology, Northwest University) Tetsuji Onoue (Earth and Environmental Sciences, Graduate School of Science and Technology, Kumamoto University) Wataru Fujisaki (Japan Agency for Marine-Earth Science and Technology) | |
| Time | Presentation No | Title | Presenter | Abstract |
|---|---|---|---|---|
| Oral Presentation May 28 AM2 | ||||
| 10:50 - 11:10 | BCG08-01 | The Ediacaran-Cambrian transition of North China | Xingliang Zhang | |
| 11:10 - 11:30 | BCG08-02 | The Qingjiang biota – An extraordinary new Burgess Shale-type fossil Lagerstätte from the early Cambrian of South China | Dongjing Fu | |
| 11:30 - 11:50 | BCG08-03 | Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary | Tetsuji Onoue | |
| 11:50 - 12:10 | BCG08-04 | End-Triassic Mass Extinction: Causes and Consequences | Wataru Fujisaki | |
| Oral Presentation May 28 PM1 | ||||
| 13:45 - 14:00 | BCG08-05 | Transition of biodiversity in mobile populations and the small world in local subpopulations | Kota Imaoka | |
| 14:00 - 14:15 | BCG08-06 | Rivision of the lowermost Cambrian SSF stratigraphy | KONO SENA | |
| 14:15 - 14:30 | BCG08-07 | δ88Sr and87Sr/86Srrecords of the Middle-Late Permian seawater: mass extinction-relevant change in ocean Sr budget | Tomomi Kani | |
| 14:30 - 14:45 | BCG08-08 | Formation of stratiform manganese deposits during the Carnian (Late Triassic) “pluvial event” in the pelagic Panthalassa | Yuki Tomimatsu | |
| 14:45 - 15:00 | BCG08-09 | Enrichment of chalcophile elements in Cretaceous–Paleogene boundary clays | Teruyuki Maruoka | |
| 15:00 - 15:15 | BCG08-10 | Mass extinctions: hierarchy of causes and cosmoclimatological perspective | Yukio Isozaki | |
| Presentation No | Title | Presenter | Abstract |
|---|---|---|---|
| Poster Presentation May 28 PM2 | |||
| BCG08-P01 | Marine Osmium isotope record across the Aptian/Albian boundary to elucidate the relationship between the Oceanic Anoxic Event 1b and massive volcanic activities at the Southern Kerguelen Plateau | Hironao Matsumoto | |
| BCG08-P02 | Rhaetian (Late Triassic) conodont biostratigraphy of the Panthalassa Ocean and the final extinction of conodonts at the end of the Triassic | Kanna Yamasaki | |
| BCG08-P03 | Paleoenvironmental changes across the Permian/Triassic boundary sections in the Mino Belt, central Japan | Shinya Uemura | |
| BCG08-P04 | Geotectonic history of Mona Complex in Anglesey-Lleyn, Wales | HISASHI ASANUMA | |
| BCG08-P05 | Radiogenic Sr isotope chemostratigraphy of the Ediacaran Doushantuo Formation in the Yangtze Craton, South China | Yusuke Sawaki | |