The Campi Flegrei Deep Drilling Project (CFDDP): New insight on caldera structure, evolution and hazard implications for the Naples area (Southern Italy)
The Campi Flegrei Deep Drilling Project (CFDDP): New insight on caldera structure, evolution and hazard implications for the Naples area (Southern Italy)
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Campi Flegrei 深钻项目 (CFDDP)：对那不勒斯地区（意大利南部）火山口结构、演化和灾害影响的新见解
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
R. Somma
中科院分区：
文献类型：
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作者：
G. de Natale;C. Troise;D. Mark;A. Mormone;M. Piochi;M. D. Di Vito;R. Isaia;S. Carlino;D. Barra;R. Somma
Campi Flegrei Deep Drilling Project的501米深孔位于那不勒斯大都市区西部和Campi Flegrei破火山口内，为重建这座人口稠密的火山的火山构造演化提供了新的见解。它是世界上风险最高的火山地区之一，但其构造结构，喷发历史和最大喷发的规模在文献中存在激烈争论。新的地层学和40 Ar/39 Ar地质年代学测年使我们能够首次确定属于两个最高级别的火山口形成喷发的火山口内沉积物的年龄（即，坎帕尼亚火山灰岩，CI，39 ka，和那不勒斯黄色凝灰岩，纽约时报，14.9 ka），并估计崩溃的数量。439米深处的凝灰岩产生了第一个约40 Ar/39 Ar年龄。火山口内39 ka，与CI一致。此外，在250至160米之间发现了来自纽约时报的火山岩。我们的研究结果强调：（i）受破火山口塌陷影响的地区减少，这似乎不包括那不勒斯市;（ii）少量的填充破火山口沉积物，特别是CI，以及（iii）需要重新评估塌陷量和与较大喷发有关的机制。我们的研究结果还意味着重新评估火山的风险，东部火山口地区，包括那不勒斯市。这项研究的结果指出，大型破火山口的特点是复杂的崩溃机制和动力学，其理解需要更强大的约束，这可以从科学钻探获得。
The 501 m deep hole of the Campi Flegrei Deep Drilling Project, located west of the Naples metropolitan area and inside the Campi Flegrei caldera, gives new insight to reconstruct the volcano‐tectonic evolution of this highly populated volcano. It is one of the highest risk volcanic areas in the world, but its tectonic structure, eruptive history, and size of the largest eruptions are intensely debated in the literature. New stratigraphic and 40Ar/39Ar geochronological dating allow us to determine, for the first time, the age of intracaldera deposits belonging to the two highest magnitude caldera‐forming eruptions (i.e., Campanian Ignimbrite, CI, 39 ka, and Neapolitan Yellow Tuff, NYT, 14.9 ka) and to estimate the amount of collapse. Tuffs from 439 m of depth yield the first 40Ar/39Ar age of ca. 39 ka within the caldera, consistent with the CI. Volcanic rocks from the NYT were, moreover, detected between 250 and 160 m. Our findings highlight: (i) a reduction of the area affected by caldera collapse, which appears to not include the city of Naples; (ii) a small volume of the infilling caldera deposits, particularly for the CI, and (iii) the need for reassessment of the collapse amounts and mechanisms related to larger eruptions. Our results also imply a revaluation of volcanic risk for the eastern caldera area, including the city of Naples. The results of this study point out that large calderas are characterized by complex collapse mechanisms and dynamics, whose understanding needs more robust constraints, which can be obtained from scientific drilling.
影响因子：
4
作者：
V. Smith;D. Mark;R. Staff;S. Blockley;C. Ramsey;C. Bryant;T. Nakagawa;Kim Kyu Han;A. Weh;K. Takemura;T. Danhara
通讯作者：
V. Smith;D. Mark;R. Staff;S. Blockley;C. Ramsey;C. Bryant;T. Nakagawa;Kim Kyu Han;A. Weh;K. Takemura;T. Danhara