Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1609112113 |
Holocene carbonate record of Lake Kivu reflects the history of hydrothermal activity | |
Votava, Jillian E.; Johnson, Thomas C.; Hecky, Robert E. | |
2017-01-10 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:2页码:251-256 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The sediment record of Lake Kivu reveals a complex volcanogenic and climatic Holocene history. Investigation of the inorganic carbonate record dates the onset of carbonate deposition in the mid-Holocene in Kivu's deep northern and eastern basins and identifies conditions enabling deposition. The magnitude and timing of carbonate-rich sedimentation is not so much controlled by climate but, instead, linked strongly to hydrothermal activity in the basin. Sublacustrine springs supply the vast majority of the calcium and carbonate ions required for supersaturation with respect to aragonite. This major hydrothermal activity that permanently stratifies Lake Kivu today was initiated similar to 3,100 y before present (3.1 ka), when carbonate-rich sediments first appeared in the Holocene record. Aragonite is the dominant CaCO3 mineral present in the lake deposits. Both delta C-13 and delta O-18 of the aragonite are enriched above the expected kinetic fractionation of meteoric waters, suggesting a volcanogenic influence on the formation waters. Repeated major fluctuations in the carbonate record after 3.1 ka therefore most likely reflect the historical variation in hydrothermal inputs. |
英文关键词 | CaCO3 Lake Kivu hydrothermal activity Holocene East Africa |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000391439300034 |
WOS关键词 | EAST-AFRICA ; SUBAQUATIC VOLCANISM ; LATE PLEISTOCENE ; TANGANYIKA ; SEDIMENTS ; TERMINATION ; RESPONSES ; ONSET ; LEVEL |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204710 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | Univ Minnesota, Large Lakes Observ, Duluth, MN 55812 USA |
推荐引用方式 GB/T 7714 | Votava, Jillian E.,Johnson, Thomas C.,Hecky, Robert E.. Holocene carbonate record of Lake Kivu reflects the history of hydrothermal activity[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(2):251-256. |
APA | Votava, Jillian E.,Johnson, Thomas C.,&Hecky, Robert E..(2017).Holocene carbonate record of Lake Kivu reflects the history of hydrothermal activity.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(2),251-256. |
MLA | Votava, Jillian E.,et al."Holocene carbonate record of Lake Kivu reflects the history of hydrothermal activity".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.2(2017):251-256. |
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