Effect of Miocene basaltic volcanism in Shanwang (Shandong Province, China) on environmental changes
文献类型：期刊论文
| 作者 | Guo ZhengFu; Liu JiaQi; Chen XiaoYu |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2007-12-01 |
| 卷号 | 50期号:12页码:1823-1827 |
| 关键词 | volcanic volatiles paleo-environment acid rain basalt Shanwang |
| ISSN号 | 1006-9313 |
| DOI | 10.1007/s11430-007-0119-4 |
| 文献子类 | Article |
| 英文摘要 | Miocene (16-10 Ma) basalts, together with significantly well-preserved fossils (including animal and plant fossils) in the contemporaneously tephra-rich Maar sediments, are located in Shanwang volcanic region, Shandong Province, China. Distribution area of the basaltic eruption products is about 240 km(2). Detailed field observations indicate that most of basaltic rocks are fissure eruptive products and some are central eruptives constrained by linear faults. The well-preserved fossils in the lacustrine deposits have been considered to be a result of mass mortalities. Based on physically volcanologic modeling results, eruption column of the basaltic fissure activities in the Shanwang volcanic region is estimated to have entered the stratosphere. Petrographic observations indicate that the basalts have porphyritic textures with phenocrysts of olivine, pyroxene, plagioclase feldspar and alkali feldspar setting in groundmass of plagioclase feldspar, alkali feldspar, quartz, apatite and glass. Based on observations of tephra, tuff and tuffites collected in the Maar sediments of the Shanwang area, we determined major element oxide concentrations and volatile composition of melt inclusions in phenocrysts and matrix glasses by electron microprobe analysis. Volatile (including S, Cl, F and H(2)O) concentrations erupted into the stratosphere were estimated by comparing pre-and post-eruptive volatile concentrations. Our determination results show that contents of S, Cl, F and H(2)O emitted into the stratosphere were 0.18%-0.24%, 0.03%-0-05%, 0.03%-0.05% and 0.4%-0.6%, respectively, which was characterized by high-S contents erupted. Amounts of volatiles emitted in the Shanwang volcanic region are much higher than those in eruptions which had a substantial effect on climate and environment. According to the compositions and amounts of the volatiles erupted from the Miocene basaltic volcanism in Shanwang, we propose a hypothesis that volatile-rich basaltic volcanism could result in the mass mortalities by injecting volatiles (e.g., SO(2), H(2)S, HCl, HF and H(2)O) into the stratosphere that would have triggered abrupt environmental changes (including formation of acid rain, temperature decline, ozone depletion, etc.) and altered lake chemistry, and subsequently volcanic ash fall buried and covered the dead animals and plants, forming well-preserved fossils in Shanwang Maar sediments. |
| WOS关键词 | BAITOUSHAN VOLCANO ; VOLATILE EMISSION ; ERUPTION ; AD ; SULFUR |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000251020300007 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67270]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Guo ZhengFu |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo ZhengFu,Liu JiaQi,Chen XiaoYu. Effect of Miocene basaltic volcanism in Shanwang (Shandong Province, China) on environmental changes[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50(12):1823-1827. |
| APA | Guo ZhengFu,Liu JiaQi,&Chen XiaoYu.(2007).Effect of Miocene basaltic volcanism in Shanwang (Shandong Province, China) on environmental changes.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,50(12),1823-1827. |
| MLA | Guo ZhengFu,et al."Effect of Miocene basaltic volcanism in Shanwang (Shandong Province, China) on environmental changes".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 50.12(2007):1823-1827. |
入库方式： OAI收割
来源：地质与地球物理研究所
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