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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Revisiting the age of the Jumento volcano, Chichinautzin Volcanic Field (Central Mexico), using in situ-produced cosmogenic ~(10)Be
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Revisiting the age of the Jumento volcano, Chichinautzin Volcanic Field (Central Mexico), using in situ-produced cosmogenic ~(10)Be

机译：使用原位产生的宇宙成因〜（10）Be重新审视奇门托津火山场（墨西哥中部）的尤门托火山的年龄

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摘要

Previous studies on Jumento volcano, based on radiocarbon dating and comparative morphometric analysis, suggest that it could be the youngest volcano of the Sierra Chichinautzin. Here we establish a new chronology of the emplacement of the Late Holocene lava flows of Jumento volcano using in situ-produced Be-10 cosmic ray exposure (CRE) dating of quartz xenocrysts to test this hypothesis. Depending on the choice of the cosmogenic nuclide production parameters in the exposure age calculators used, the mean Be-10 CRE ages ranges between 1.86 +/- 0.68 ka and 2.41 +/- 0.97 ka for the inner lava flow and between 1.90 +/- 0.29 ka and 2.49 +/- 0.41 ka for the breakout lava flow. These preliminary mean Be-10 CRE ages confirm that the Jumento volcano is one of the youngest volcanoes of the Sierra Chichinautzin although slightly older than the Xitle volcano. This first Be-10 eruption chronology of the Sierra Chichinautzin shows that Be-10 CRE dating represents an alternative approach to date volcanic rocks, not only for the Sierra Chichinautzin but also for other volcanic fields, especially when no charcoal or paleosoils are available for radiocarbon dating. Furthermore, it suggests that in situ-produced cosmogenic nuclide dating has considerable potential to throw light on the volcanic history and eruption recurrence of this volcanic field, in order to provide enough data for the mitigation of the hazards and related risks in Mexico City, the city of Cuernavaca and the small towns around the volcanic field. (C) 2018 Elsevier B.V. All rights reserved.
机译：根据放射性碳测年和比较形态计量学分析，对Jumento火山的先前研究表明，它可能是Chichinautzin山脉中最年轻的火山。在这里，我们使用石英异晶体的原位生成的Be-10宇宙射线暴露（CRE）日期建立了一个新的Jumento火山晚期全新世熔岩流进位的年代表，以检验这一假设。根据所使用的暴露年龄计算器中宇宙性核素生产参数的选择，内部熔岩流的Be-10 CRE平均年龄介于1.86 +/- 0.68 ka至2.41 +/- 0.97 ka之间，且介于1.90 +/-之间。裂隙熔岩流为0.29 ka和2.49 +/- 0.41 ka。这些初步的平均Be-10 CRE年龄证实了Jumento火山是Sichina Chichinautzin最年轻的火山之一，尽管比Xitle火山稍老。塞奇纳楚津山脉的第一个Be-10喷发年表表明，Be-10 CRE年代定年法是火山岩年代的一种替代方法，不仅对于塞奇纳楚津（Sierra Chichinautzin）而言，而且对于其他火山场，特别是当没有木炭或古土壤可用于放射性碳时约会。此外，这表明原位产生的宇宙成因核素测年具有相当大的潜力来阐明该火山场的火山历史和喷发复发，以便为减轻墨西哥城的灾害和相关风险提供足够的数据。奎尔纳瓦卡市和火山场周围的小镇。 （C）2018 Elsevier B.V.保留所有权利。

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