Holocene sedimentary records from Lake Borsog, eastern shore of Lake Khuvsgul, Mongolia, and their paleoenvironmental implications
Holocene sedimentary records from Lake Borsog, eastern shore of Lake Khuvsgul, Mongolia, and their paleoenvironmental implications
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DOI：
10.1016/j.quaint.2012.03.041
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发表时间：
2013-03
影响因子：
2.2
通讯作者：
A. Orkhonselenge;S. Krivonogov;K. Mino;K. Kashiwaya;I. Safonova;M. Yamamoto;K. Kashima;Toshio Nakamura;Jin-Cheul Kim
中科院分区：
文献类型：
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作者：
A. Orkhonselenge;S. Krivonogov;K. Mino;K. Kashiwaya;I. Safonova;M. Yamamoto;K. Kashima;Toshio Nakamura;Jin-Cheul Kim
本文介绍了新的沉积学，地质年代学和硅藻数据从13米的沉积物从Borsog湖，前海湾的呼斯古尔湖（也被称为Hovsgol和Khubsugul）在蒙古西北部的核心。博尔索格湖是在冰后期海侵的早期阶段从胡夫斯古尔分离出来的，拥有高分辨率的全新世记录。数据显示，在7.4-7.1，4.8-4.5，和1.0-0.9 ka cal. BP，这可能与湖平面下降，减少湖泊面积，博尔索格河三角洲的侵蚀和较高的侵蚀暴露湖岸的三个短期事件的较高速率的沉积。湖平面的下降与先前记录的Khuvsgul湖平面的下降相匹配。7.2-7.0，4.5-4.1和2.1-0.5 ka cal. BP，表明两个湖泊分离后继续相互关联和气候控制的演变。
This paper presents new sedimentological, geochronological and diatom data from a 13-m core of sediment from Lake Borsog, a former bay of Lake Khuvsgul (also known as Hovsgol and Khubsugul) in northwestern Mongolia. Lake Borsog was separated from Khuvsgul during the early stages of a post-glacial transgression and possesses a high-resolution record of the Holocene. The data show three short events of higher-rate sedimentation at 7.4–7.1, 4.8–4.5, and 1.0–0.9 ka cal. BP, which are possibly related to lake level drops, reduction of lake area, progradation of the delta of the Borsog River and higher erosion of the exposed lake shores. The drops in lake level match the previously documented drops of the level of Lake Khuvsgul at ca. 7.2–7.0, 4.5–4.1 and 2.1–0.5 ka cal. BP, suggesting continued mutually-related and climatically-controlled evolution of both lakes after their separation.