Patterns of Plio-Pleistocene Ice Volume Variability Recorded by the Large-Magnitude Explosive Eruptions From the Kamchatka-Kurile Volcanic Arc

IF 2.9 2区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Susanne M. Straub, Brendan Reilly, Maureen E. Raymo, Arturo Gómez-Tuena, Kuo-Lung Wang, Elisabeth Widom, David Kuentz, Richard J. Arculus
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引用次数: 0

Abstract

Marine fallout ash beds can provide continuous, time-precise records of highly explosive arc volcanism that can be linked with the climate record. An evaluation of revised Plio-Pleistocene (0–4 Myr) tephrostratigraphies from Ocean Drilling Program Sites 881, 882, and 884 confirms cyclicity of the Kamchatka-Kurile arc volcanism and a marked increase just after the intensification of the Northern Hemisphere glaciation at 2.73 Ma. The compositional constancy of the Kamchatka-Kurile volcano-magma systems through time points to external modulation of volcanic cyclicity and frequency. The stacked tephra record reveals periodic peaks in arc volcanicity at ∼0.3, ∼1.0, ∼1.6, ∼2.5, and ∼3.8 Myr that coincide with maxima of the global ice volume variability that have been linked with the amplitude modulation of the precession (0.3, 1.0 Myr) and obliquity (1.6, 2.5 and 3.8 Myr) bands. A simple model of a decreasing obliquity variance across the mid-Pleistocene Transition at constant precession variance produces an excellent correlation of ash bed cycles with the variability of global benthic δ18O (r2 = 0.75), which implies that climate, and not direct orbital forcing, modulates Kamchatka-Kurile arc volcanism. The rising influence of precession variance in the Kamchatka-Kurile ash bed record after the mid-Pleistocene Transition contrasts with the dominant 100 kyr signal in the benthic δ18O global ice volume variability, which may either reflect limitations of the ash bed record or an regional rather than global influence of ice volume variability. Our results indicate that climate influences the Kamchatka-Kurile arc volcanism, which may influence climate only by feedback.

Abstract Image

堪察加半岛-库里尔火山弧的大规模爆发所记录的上新世-更新世冰量变化模式
海洋火山灰床可以提供连续的、时间精确的高爆炸性弧形火山活动记录,这些记录可以与气候记录联系起来。对来自大洋钻探计划第 881、882 和 884 号站点的经修订的上新世-更新世(0-4 Myr)表层岩画的评估证实了堪察加半岛-库里尔弧火山活动的周期性,以及在 2.73 Ma 北半球冰川作用加剧之后火山活动的明显增加。堪察加半岛-库里尔火山-岩浆系统在不同时期的成分恒定性表明火山周期性和频率受到了外部的调节。堆叠的火山灰记录显示了弧形火山在 ∼ 0.3、∼ 1.0、∼ 1.6、∼ 2.5 和 ∼ 3.8 Myr 的周期性峰值,这些峰值与全球冰量变率的最大值相吻合,而全球冰量变率的最大值与前向带(0.3、1.0 Myr)和斜向带(1.6、2.5 和 3.8 Myr)的振幅调制有关。一个简单的模型是,在恒定的前向变异的情况下,整个中新世过渡带的倾角变异不断减小,从而产生了火山灰床周期与全球底栖生物δ18O 变异的极佳相关性(r2 = 0.75),这意味着是气候而不是直接的轨道强迫调节了堪察加半岛-库里尔弧的火山活动。勘察加-库里勒火山灰床记录中的前向变异在更新世中期之后的影响不断上升,这与底栖生物δ18O全球冰量变异中的100 kyr主要信号形成了鲜明对比,这可能反映了火山灰床记录的局限性,也可能反映了冰量变异的区域性影响而非全球性影响。我们的研究结果表明,气候影响堪察加半岛-库里尔弧火山活动,而火山活动可能仅通过反馈作用影响气候。
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来源期刊
Geochemistry Geophysics Geosystems
Geochemistry Geophysics Geosystems 地学-地球化学与地球物理
CiteScore
5.90
自引率
11.40%
发文量
252
审稿时长
1 months
期刊介绍: Geochemistry, Geophysics, Geosystems (G3) publishes research papers on Earth and planetary processes with a focus on understanding the Earth as a system. Observational, experimental, and theoretical investigations of the solid Earth, hydrosphere, atmosphere, biosphere, and solar system at all spatial and temporal scales are welcome. Articles should be of broad interest, and interdisciplinary approaches are encouraged. Areas of interest for this peer-reviewed journal include, but are not limited to: The physics and chemistry of the Earth, including its structure, composition, physical properties, dynamics, and evolution Principles and applications of geochemical proxies to studies of Earth history The physical properties, composition, and temporal evolution of the Earth''s major reservoirs and the coupling between them The dynamics of geochemical and biogeochemical cycles at all spatial and temporal scales Physical and cosmochemical constraints on the composition, origin, and evolution of the Earth and other terrestrial planets The chemistry and physics of solar system materials that are relevant to the formation, evolution, and current state of the Earth and the planets Advances in modeling, observation, and experimentation that are of widespread interest in the geosciences.
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