在快速扩散的山脊上,混合的浅层轴上和深层轴外的热水循环
Jörg Hasenclever1, Sonja Theissen-Krah2, Lars H Rüpke1
1GEOMAR, Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, 24148 Kiel, Germany.
Nature
|April 25, 2014
概括
海洋扩散中心的热流涉及两个相互作用的组成部分. 这种由不同的机制驱动的双流系统解释了从下层地中提取热量的原因,并为排气点提供料.
科学领域:
- 地质物理学 地质物理学
- 海洋学 海洋学 海洋学
- 地球科学 地球科学 地球科学
背景情况:
- 海洋扩散中心的热流对于海洋热量流,板块热结构和地化学是至关重要的.
- 它支持化学合成生态系统,并形成巨大的硫化矿石矿床.
- 了解热量提取,特别是从下层地中提取的热量,仍然是一个重大挑战.
研究的目的:
- 研究从快速扩散的山脊下方的下层地中提取水热热的机制和条件.
- 为了建模影响海洋板块的复杂的热水流系统.
主要方法:
- 高分辨率,整个地,二维和三维的水热流的数值模拟.
- 通过热力学特性和地透度控制的相互作用流体组件的分析.
主要成果:
- 确定了两个相互作用的热液流组成部分:浅的轴上和更深的轴外.
- 浅水流是由水的热力学特性控制的;深水流受地的透性和脆性-柔性过渡的影响.
- 深度离轴流,虽然质量较低,但运输大约70%的热能释放在轴.
结论:
- 双组件热水流模型解释了海洋地的地震决定的热结构.
- 这个模型协调了以前的,看似不兼容的,在轴上与轴外热水循环的模型.
- 这些发现澄清了热量提取过程及其对海洋板块形成和地球化学的影响.
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