Mg and Sr Isotopes in Cap Dolostone: Implications for Oceanic Mixing after a Neoproterozoic Snowball Earth Event
文献类型：期刊论文
| 作者 | Lin, Shiau-Shiun1; You, Chen-Feng1; Chung, Chuan-Hsiung1; Huang, Kuo-Fang2; Zhou, Chuanming3
|
| 刊名 | WATER
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 15期号:15页码:22 |
| 关键词 | Snowball Earth cap dolostone d(26)Mg and Sr-87/Sr-86 Shiyu |
| DOI | 10.3390/w15152688 |
| 通讯作者 | You, Chen-Feng(cfy20@mail.ncku.edu.tw) |
| 英文摘要 | The snowball Earth (SBE) describes a state of the Earth's climate with global or near-global ice cover. The cap dolostone at the base of the Ediacaran successions serves as useful archives for studying environmental change during the Marinoan Snowball Earth deglaciation in Neoproterozoic. The characteristic compositions in dolomite provide critical information on continental weathering and coastal water mixing after glacial retreat. However, valid methods for pristine dolomite separation remain challenging. In this study, four selected cap dolostone samples from the base of the Ediacaran Lantian Formation were used for establishing a new 3-step leaching method, to remove the secondary calcite and other impurities before determination of d(26)Mg and Sr-87/Sr-86 in dolomite. Non-destructive Raman, X-ray diffractometer (XRD) and scanning electron microscopy (SEM) were used to examine the distribution of dolomite and minor calcite/silicate in each sample. Micro-drill powders before each extraction procedure were examined in weight loss and mineralogical compositions, as well as the chemicals in the leaching solutions. Potential diagenetic artifacts were evaluated using Sr/Ca, Mn/Sr, Sr-87/Sr-86 and d(26)Mg in solutions. By applying a simple two-end member mixing between the seawater and the silicate sources (R-2 = 0.48, n = 23), the down-core variations of d(26)Mg and Sr-87/Sr-86 in cap dolostone can be used to gain a better understand of the temporal weathering intensity changes, as well as the coastal oceanic mixing processes, after the Marinoan deglaciation. |
| WOS关键词 | SOUTH CHINA ; EDIACARAN CARBONATES ; SILICATE MELTS ; METHANE SEEPS ; FRACTIONATION ; CONSTRAINTS ; SEAWATER ; DESTABILIZATION ; GEOCHEMISTRY ; STRATIGRAPHY |
| 资助项目 | CF grant[NSTC 111-2116-M-006-007-] ; [NSTC 112-NU-E-001-001-NU] |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:001046844600001 |
| 资助机构 | CF grant |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/42599]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | You, Chen-Feng |
| 作者单位 | 1.Natl Cheng Kung Univ, Dept Earth Sci, Tainan 701, Taiwan 2.Inst Earth Sci, Acad Sin, Nankang 115, Taiwan 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Shiau-Shiun,You, Chen-Feng,Chung, Chuan-Hsiung,et al. Mg and Sr Isotopes in Cap Dolostone: Implications for Oceanic Mixing after a Neoproterozoic Snowball Earth Event[J]. WATER,2023,15(15):22. |
| APA | Lin, Shiau-Shiun,You, Chen-Feng,Chung, Chuan-Hsiung,Huang, Kuo-Fang,&Zhou, Chuanming.(2023).Mg and Sr Isotopes in Cap Dolostone: Implications for Oceanic Mixing after a Neoproterozoic Snowball Earth Event.WATER,15(15),22. |
| MLA | Lin, Shiau-Shiun,et al."Mg and Sr Isotopes in Cap Dolostone: Implications for Oceanic Mixing after a Neoproterozoic Snowball Earth Event".WATER 15.15(2023):22. |
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。