Marine depositional signatures of the Aptian Oceanic Anoxic Events in the Eastern Tethys, Lower Indus Basin, Pakistan
文献类型：期刊论文
| 作者 | Khan, S.5; Kroon, D.4; Wadood, B.2,3; Ahmad, S.5; Zhou, X.1
|
| 刊名 | AUSTRALIAN JOURNAL OF EARTH SCIENCES
 |
| 出版日期 | 2021-08-12 |
| 页码 | 17 |
| ISSN号 | 0812-0099 |
| 关键词 | microfacies eutrophication anoxic Tethys Milankovitch cycle upwelling productivity |
| DOI | 10.1080/08120099.2021.1959399 |
| 通讯作者 | Khan, S.() |
| 英文摘要 | The depositional signatures of the Cretaceous OAE1a and OAE1b intervals in the Parh Formation, Lower Indus Basin, Pakistan, Eastern Tethys, have been studied to better constrain the Aptian-Albian ocean-climate system. Based on the microfacies attributes, an outer ramp to deep basin is suggested for the deposition of Parh Formation. The quasi-periodic occurrences of radiolarian-rich microfacies and the cyclicity between the outer ramp and deep basin settings throughout the section suggest eutrophication in this part of the Eastern Tethys influenced by Milankovitch cycles. The clastic influx during OAE1a and OAE1b intervals indicate the role of continental runoff in the eutrophication of the basin. The overall negative covariance between radiolarian-rich microfacies and clastic input suggests that upwelling was a major driver of nutrient enrichment rather than continental runoff. The organic enrichment along with pyrite framboids and lack of burrows suggest that dysoxic-anoxic bottom water conditions were common throughout the Aptian and not just in the OAE1a and OAE1b intervals. The poor ventilation of the sea floor was a result of restricted circulation and may have triggered sustained anoxia during Aptian in this part of the Eastern Tethys. Bottom-water currents recharged coarser clastics to the deeper part of the basin during OAE1a and OAE1b intervals. However, the effects of deep ventilated oxic water during the events were reduced by persistent ocean anoxia. Furthermore, the dominance of carbonate sediments throughout the Aptian-lower Albian succession suggests relatively alkaline oceans in this part of Eastern Tethys. A pronounced sea-level rise, as suggested elsewhere was not observed during OAE1a and OAE1b intervals in this part of the Tethys. |
| WOS关键词 | CARBONATE PLATFORM ; CRETACEOUS CLIMATE ; MOUNTAIN BELTS ; OAE 1B ; MICROFACIES ; RAMP ; STRATIGRAPHY ; EVOLUTION ; SECTION ; FACIES |
| 资助项目 | Strategic Pilot Science and Technology Projects of the Chinese Academy of Sciences[XDB26000000] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | TAYLOR & FRANCIS LTD |
| WOS记录号 | WOS:000684484000001 |
| 资助机构 | Strategic Pilot Science and Technology Projects of the Chinese Academy of Sciences |
| 源URL | [http://119.78.100.205/handle/311034/18187]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 通讯作者 | Khan, S. |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 2.Univ Swabi, Dept Geol, Swabi, Pakistan 3.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian, Peoples R China 4.Univ Edinburgh, Grant Inst, Dept Geol & Geophys, Edinburgh, Midlothian, Scotland 5.Univ Peshawar, Dept Geol, Peshawar, Pakistan |
| 推荐引用方式 GB/T 7714 | Khan, S.,Kroon, D.,Wadood, B.,et al. Marine depositional signatures of the Aptian Oceanic Anoxic Events in the Eastern Tethys, Lower Indus Basin, Pakistan[J]. AUSTRALIAN JOURNAL OF EARTH SCIENCES,2021:17. |
| APA | Khan, S.,Kroon, D.,Wadood, B.,Ahmad, S.,&Zhou, X..(2021).Marine depositional signatures of the Aptian Oceanic Anoxic Events in the Eastern Tethys, Lower Indus Basin, Pakistan.AUSTRALIAN JOURNAL OF EARTH SCIENCES,17. |
| MLA | Khan, S.,et al."Marine depositional signatures of the Aptian Oceanic Anoxic Events in the Eastern Tethys, Lower Indus Basin, Pakistan".AUSTRALIAN JOURNAL OF EARTH SCIENCES (2021):17. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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。