火山活动是对板块曲的反应
Naoto Hirano1, Eiichi Takahashi, Junji Yamamoto
1Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8551, Japan. nhirano@ucsd.edu
概括
新的研究确定了太平洋板块上一种新型的火山活动,与已知的构造设置无关. 这一发现揭示了小型性火山,这些火山是由石层裂沿着石层融化而形成的.
科学领域:
- 地质地质地质地质地质地
- 地质物理学 地质物理学
- 板块构造学是一种板块构造学.
背景情况:
- 地球的火山活动传统上与三个主要的构造环境有关:分离板块边界,收板块边界和热点.
- 太平洋板块的年龄为1.35亿年,其火山活动不符合这些既定类别.
研究的目的:
- 描述太平洋板块上新发现的一种火山活动的特征.
- 调查这些异常火山的起源和形成机制.
主要方法:
- 分析火山岩的微量元素地质化学.
- 贵重气体的同位素组成分析.
- 地质绘图和火山特征的年龄进展研究.
主要成果:
- 在太平洋板上识别小性火山.
- 有证据表明,形成的原因是小比例的融起源于天气层.
- 火山沿石灰岩层裂爆发,可能是由探过程中板块屈曲驱动的.
结论:
- 这种火山活动代表了第四种构造学设置,与分离,收和热点设置不同.
- 微小的天气层融化和特定的火山对齐支持了拟议的形成机制.
- 这些发现扩大了我们对火山过程和板块构造学的理解.
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