KMS Nanjing Institute of Geology and Palaeonotology,CAS
Sulfate oxygen-17 anomaly in an Oligocene ash bed in mid-North America: Was it the dry fogs? | |
Bao, HM; Thiemens, MH; Loope, DB; Yuan, XL (袁训来) | |
2003-08-21 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
卷号 | 30期号:16页码:4 |
摘要 | The oxygen and sulfur isotope compositions of sulfate, particularly the oxygen-17 anomaly, provide clues to the origin of sulfate. We report a variable oxygen-17 anomaly for water- and acid-leached sulfate from an Oligocene volcanic ash bed in the northern High Plains, U. S. A. We find no sulfate O-17 anomaly, however, in freshly collected ashes from recent eruptions around the world. The Oligocene paleoclimatic and sedimentary evidence argues against a hyperarid condition in the High Plains, thus a long-term background atmospheric sulfate accumulation is less likely the origin. Combining sulfur isotope data, we suggest that the anomalous sulfate was associated with volcanic eruptions in the west, but was not directly carried by ash-falls. Extreme dry-fog ( sulfate haze) events resulting from tropospheric oxidation of volcanic sulfur gases might provide a viable explanation for the sulfates in the ash bed that carry the oxygen-17 anomaly. |
DOI | 10.1029/2003GL016869 |
语种 | 英语 |
关键词[WOS] | El-chichon Volcano ; Sulfur-dioxide ; 1982 Eruptions ; Oxidation ; Deposits ; Geochemistry ; Systematics ; Delta-o-17 ; Leachates ; Pathways |
WOS研究方向 | Geology |
WOS类目 | Geosciences, Multidisciplinary |
WOS记录号 | WOS:000184998400001 |
出版者 | AMER GEOPHYSICAL UNION |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/1189 |
专题 | 中国科学院南京地质古生物研究所 其他 |
通讯作者 | Bao, HM |
作者单位 | 1.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA 2.Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA 3.Univ Nebraska, Dept Geosci, Lincoln, NE 68588 USA 4.Acad Sinica, Nanjing Inst Geol & Paleontol, Nanjing 210008, Peoples R China |
推荐引用方式 GB/T 7714 | Bao, HM,Thiemens, MH,Loope, DB,et al. Sulfate oxygen-17 anomaly in an Oligocene ash bed in mid-North America: Was it the dry fogs?[J]. GEOPHYSICAL RESEARCH LETTERS,2003,30(16):4. |
APA | Bao, HM,Thiemens, MH,Loope, DB,&Yuan, XL .(2003).Sulfate oxygen-17 anomaly in an Oligocene ash bed in mid-North America: Was it the dry fogs?.GEOPHYSICAL RESEARCH LETTERS,30(16),4. |
MLA | Bao, HM,et al."Sulfate oxygen-17 anomaly in an Oligocene ash bed in mid-North America: Was it the dry fogs?".GEOPHYSICAL RESEARCH LETTERS 30.16(2003):4. |
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