科罗拉多高原的岩和升起是由异质石化层的变暖引起的
Mousumi Roy1, Thomas H Jordan, Joel Pederson
1Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, USA. mroy@unm.edu
Nature
|June 19, 2009
概括
科罗拉多高原 科罗拉多高原
科学领域:
- 地力学是什么?地力学是什么?
- 构造学 构造学 构造学 构造学
- 高原的升起升起.
背景情况:
- 科罗拉多高原的岩石升起机制仍在争论中.
- 它经历了显著的升起,没有主要的内部变形,与相邻地区不同.
研究的目的:
- 为科罗拉多高原岩石提升提出和测试一个地力学模型.
- 为了解释在高原上观察到的地质和地质物理对比.
主要方法:
- 石质层变暖和导电再平衡的地动力学建模.
- 考古时代岩石侵蚀和重力数据的分析.
主要成果:
- 在法拉隆板块被移除后的石质层变暖推动了高原的升起.
- 模型解释了岩侵占 (3-6 km/Myr) 和边缘地质物理异常.
结论:
- 科罗拉多高原中期后的岩层变暖是科罗拉多高原气体升高的主要驱动因素.
- 这种机制对其他板内部设置具有潜在意义.
相关概念视频
Global Climate Change
24.4K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.4K
Phase Transitions: Melting and Freezing
11.7K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
11.7K
Phase Transitions: Sublimation and Deposition
16.0K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
16.0K
Isothermal Processes
3.8K
A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
3.8K
Magnetostatic Boundary Conditions
1.9K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.9K
Temperature Dependent Deformation
742
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
742


