Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL096309 |
An early Holocene primary dolomite layer of abiotic origin in Lake Sayram, Central Asia | |
Jianru Cheng; Xianqiang Meng; Enlou Zhang; Qingfeng Jiang; Zhenyu Ni; Junfeng Ji | |
2021-11-24 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | The “dolomite problem” is a long-standing puzzle in sedimentology and mineralogy. Previous studies have shown that some dolostones are formed by microbes or in hydrothermal-burial environments. Here, we provide a different case in which an abiotic and Ca-rich dolomite layer precipitated in Lake Sayram, Central Asia, during the early Holocene. The 12-cm-thick layer consists of abundant partially ordered dolomite crystals (mean>50 wt% and maximum=81 wt%) which have euhedral and rhombohedral shapes and weak cation ordering. Transmission electron microscopy reveals that even in a single crystal, compositions vary among different domains. Mineralogical and isotopic evidence suggests that these dolomites are of primary and abiotic origin. We infer that this dolomite layer is the product of day and night temperature cycling of shallow lake water under local warming trend. This study provides evidence for abiotic dolomites forming at ambient temperature. |
领域 | 气候变化 |
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/342350 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Jianru Cheng,Xianqiang Meng,Enlou Zhang,et al. An early Holocene primary dolomite layer of abiotic origin in Lake Sayram, Central Asia[J]. Geophysical Research Letters,2021. |
APA | Jianru Cheng,Xianqiang Meng,Enlou Zhang,Qingfeng Jiang,Zhenyu Ni,&Junfeng Ji.(2021).An early Holocene primary dolomite layer of abiotic origin in Lake Sayram, Central Asia.Geophysical Research Letters. |
MLA | Jianru Cheng,et al."An early Holocene primary dolomite layer of abiotic origin in Lake Sayram, Central Asia".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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。
修改评论