根据地震波形建模确定华通盆地的热年龄:对东南亚演变的洞察
Justin Yen-Ting Ko1, Ban-Yuan Kuo2, Shu-Chuan Lin2
1Institute of Oceanography, National Taiwan University, Taipei, Taiwan. justinko@ntu.edu.tw.
Scientific reports
|September 14, 2023
概括
华通盆地 (Huatung Basin) 是一个大盆地.
科学领域:
- 地质物理学 地质物理学
- 板块构造学是一种板块构造学.
- 地震学 地震学
背景情况:
- 华通盆地的年龄不确定 (30-130万年前),阻碍了对构造学的理解.
- 该盆地对台湾的山脉建设和菲律宾海板动态至关重要.
研究的目的:
- 为了准确地确定华通盆地的热年龄.
- 解决以前年龄估计中的差异.
主要方法:
- 使用台湾记录的数据进行远震波形分析.
- 波形匹配以限制板块尺寸 (400x150公里,55°潜水).
- 应用年龄依赖的潜伏区热模型.
主要成果:
- 约束的华通盆地热年龄在20-50万年前之间.
- 在板芯内发现了6%的P波速度异常.
- 地质物理和地磁数据支持推导的热时代.
结论:
- 华通盆地的热年龄估计在20-50万年前.
- 放射测年法上的差异表明板块复原或色样本.
- 这个年龄为区域构造学研究提供了更可靠的约束.
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