Late Ordovician beachrock as a far-field indicator for glacial meltwater pulse
文献类型：期刊论文
| 作者 | Li, Qijian1 ; Na, Lin1; Yu, Shenyang2; Lehnert, Oliver3; Munneck, Axel4; Li, Yue1
|
| 刊名 | ESTONIAN JOURNAL OF EARTH SCIENCES
 |
| 出版日期 | 2023 |
| 卷号 | 72期号:1页码:1 |
| ISSN号 | 1736-4728 |
| 关键词 | glaciation palaeokarst Katian Tarim Block northwestern China |
| DOI | 10.3176/earth.2023.13 |
| 通讯作者 | Li, Qijian(qijianli@hotmail.com) |
| 英文摘要 | Understanding ancient climate changes is hampered by the inability to disentangle trends in continental ice volume from records of relative sea-level change. As a unique coastal deposit in tropical and subtropical regions, beachrock has been proved to be reliable for constraining the glacial meltwater signal and thus the total volume of land-based ice in Quaternary. However, beachrock is rarely recognized in the fossil record due to (a) the two-dimensional distribution of beach deposits, as opposed, for example, to extended platform sediments, and (b) the fact that specific environmental conditions are required in order to lithify sediments directly on the beach. By combining the stratigraphic architecture with petrography of characteristic carbonate cements, we demonstrate the first known occurrence of Ordovician beachrock in the Tarim Block, northwestern China. According to biostratigraphic data, a middle Katian (Upper Ordovician) palaeokarst surface is capped by carbonate conglomerate beachrock and this is suggesting a significant relative sea-level rise in late Katian. The beachrock can be correlated with widespread subaerial exposure surfaces and a pronounced stratigraphic gap within the Katian in north -western Tarim. We suggest that the beachrock 'fingerprinted' a strong melt-water pulse in high latitudes after a short-lived Katian glaciation, which has not received much attention in scientific papers so far. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | ESTONIAN ACAD PUBLISHERS |
| WOS记录号 | WOS:001019621500002 |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/42596]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Li, Qijian |
| 作者单位 | 1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, East Beijing Rd 39, Nanjing 210008, Peoples R China 2.Qufu Normal Univ, Sch Geog & Tourism, Yantai North Rd 80, Rizhao 276826, Peoples R China 3.Friedrich Alexander Univ Erlangen Nuremberg, Geozentrum Nordbayern, Crustal Dynam, Schlossgarten 5, D-91054 Erlangen, Germany 4.Friedrich Alexander Univ Erlangen Nuremberg, Geozentrum Nordbayern, Palaeo Environm, Loewenichstr 28, D-91054 Erlangen, Germany |
| 推荐引用方式 GB/T 7714 | Li, Qijian,Na, Lin,Yu, Shenyang,et al. Late Ordovician beachrock as a far-field indicator for glacial meltwater pulse[J]. ESTONIAN JOURNAL OF EARTH SCIENCES,2023,72(1):1. |
| APA | Li, Qijian,Na, Lin,Yu, Shenyang,Lehnert, Oliver,Munneck, Axel,&Li, Yue.(2023).Late Ordovician beachrock as a far-field indicator for glacial meltwater pulse.ESTONIAN JOURNAL OF EARTH SCIENCES,72(1),1. |
| MLA | Li, Qijian,et al."Late Ordovician beachrock as a far-field indicator for glacial meltwater pulse".ESTONIAN JOURNAL OF EARTH SCIENCES 72.1(2023):1. |
入库方式： OAI收割
来源：南京地质古生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。