| 吉林大椅子山火山年代学、地球化学特征及其排气量的估算 |
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| 引用本文：于福生,袁万明,韩松,马志邦,靳克.2004.吉林大椅子山火山年代学、地球化学特征及其排气量的估算[J].地球学报,25(2):219-223. |
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| 基金项目:中国科学院重要发展方向性项目“先进核分析技术在环境科学中的应用”(编号:KJCXN01) |
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| 中文摘要:利用铀系组分法测得龙岗大椅子山火山喷发时间为距今71±9ka,属于晚更新世。各类喷发物的岩石化学、地球化学特征表明 ,它们形成于同一岩浆源。根据岩石学方法 ,结合Thordarson(1996)等人的排气模型 ,估算此次喷发向大气层输送的HCl、HF总量分别为7.36Mt和5.21Mt。 |
| 中文关键词:大椅子山火山 晚更新世 地球化学 铀系组分法 排气量估算 |
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| Chronological and Geochemical Features and Degassing Evaluation of the Dayizishan Volcano, Jilin Province |
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| Abstract:According to the analysis by U-series component method,Dayizishan volcano erupted at 71±9 ka B P in late Pleistocene. Petrochemical and geochemical features of the eruption products of all phases imply that they came from the same magma resource. Based on petrological methods and the degassing model devised by Thordarson in 1996,It is estimated from the measured chlorine and fluorine concentrations in the samples that the atmospheric loading of hydrochloric acid and that of hydrofluoric acid were 7.36 Mt and 5.21 Mt,respectively. |
| keywords:Dayizishan volcano late Pleistocene geochemistry U-series component method degassing budget evaluation |
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