冈德瓦纳地形的内板变形以及对威尔逊周期的影响
Ana Fonseca1,2, Johan De Grave3
1Institut Für Geowissenschaften, Universität Potsdam, Potsdam, Germany. ana.fonseca@uni-potsdam.de.
Scientific reports
|November 21, 2025
概括
威尔逊周期理论需要修订,因为板内变形显著影响海洋盆地演化. 这项研究揭示了 Kratons 和 Orogens 的各种构造反应,挑战了传统的板块构造模型.
科学领域:
- 地质科学 地质科学
- 构造学 构造学 构造学 构造学
- 板块构造学是一种板块构造学.
背景情况:
- 威尔逊周期描述了海洋盆地演变,但忽略了板内变形.
- 了解板块内部的过程对于完善板块构造学理论至关重要.
研究的目的:
- 为了研究在前坎布里亚克拉顿和orogens的板块内部变形和构造应力分区.
- 分析板内变形在修改威尔逊循环中的作用.
主要方法:
- 使用了无性裂变轨道热时计学.
- 分析的重点是巴西,哥伦比亚和印度的克拉顿区域 (亚马逊,圣弗朗西斯科,达尔瓦尔) 和光源区域 (巴西利亚,阿拉苏艾).
主要成果:
- 在克拉顿和orogens中观察到构造反应的显著变化.
- 一些石坑 (亚马逊,达尔瓦尔) 由于延伸而出现意想不到的挖掘,而另一些石坑 (圣弗朗西斯科) 则保持稳定.
- 有机物表现出明显的进化路径,其中一些停滞 (Brasília),另一些重新激活 (Araçuaí).
结论:
- 内板变形极大地影响了威尔逊周期,需要对传统概念进行修订.
- Kratonic 稳定性不是统一的,并且 orogenic 进化是高度可变的.
- 这项研究为推动板块构造的力量的复杂相互作用提供了新的见解.
更多相关视频
12:30High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus
Published on: April 3, 2018
19.4K
08:09Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
Published on: September 12, 2017
12.2K
相关概念视频
Temperature Dependent Deformation
351
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...
351
Global Climate Change
28.7K
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.
28.7K
Isothermal Processes
4.8K
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...
4.8K
Deformation of Member under Multiple Loadings
427
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
427
The Carbon Cycle
43.1K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.1K
Speciation Rates
22.5K
Overview
22.5K
