现在的变形遍及盆地和山脉省,美国西部
1U.S. Geological Survey, MS/977, Menlo Park, CA 94025, USA. Department of Geological Sciences, University of Durham, Science Laboratories, South Road, Durham DH1 3LE, UK.
概括
盆地和山脉省的变形集中在它的边界附近,而不是它的中心. 外板力显著影响这种延伸应力场.
科学领域:
- 地质物理学 地质物理学
- 构造学 构造学 构造学 构造学
- 地质测量是指地质测量.
背景情况:
- 盆地和山脉省表现出复杂的地质变形.
- 了解这种变形的空间分布对于地震危险评估和构造模型至关重要.
研究的目的:
- 为了绘制整个盆地和范围省的变形分布图.
- 调查观察到的变形模式背后的驱动力.
主要方法:
- 使用密集的全球定位系统 (GPS) 网络,覆盖800公里.
- 分析了1992年,1996年和1998年进行的地质调查数据.
主要成果:
- 变形集中在该省的西部和东部边界附近.
- 在犹他州西部和内华达州东部的中央500公里范围内观察到最小的变形.
- 变形模式与全新纪的断层分布相关.
结论:
- 外部板驱动力在调节延伸应力场方面具有重要作用.
- 由密度梯度和地形影响的内部浮力力也会导致边界附近的变形.
更多相关视频
07:58Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
Published on: August 7, 2017
08:09Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
Published on: September 12, 2017
相关概念视频
Topographic Surveying and Contours
Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
Plotting of Topographic Maps
Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
Net Change Theorem
The Net Change Theorem is a fundamental principle in calculus that establishes a direct relationship between a function’s rate of change and its accumulated change over an interval. Mathematically, it states that the definite integral of a function's derivative over a given interval [a,b] yields the net change in the original function:This theorem has significant applications in various real-world scenarios, including physics, economics, and engineering. A particularly useful application is in...
Level Curves and Contour Maps
Level curves and contour maps provide a way to visualize functions of two variables on a two-dimensional plane. A useful example is a topographic map, where curved lines represent locations that share the same elevation. In mathematics, these curves are called level curves or contour lines. Each contour line corresponds to points in the domain where the function has a constant value. For a function of two variables written as z = f(x,y), a level curve is defined by the equation f(x,y) = k,...
Interpretations of Partial Derivatives
A surface defined by a function of two variables can be visualized as a vast, uneven terrain, where each point is identified using Cartesian coordinates. The elevation of the terrain at any point is determined by a function that assigns a height value to every pair of horizontal coordinates. This representation allows the surface to be studied in terms of how its height varies across different directions.At a specific point on this terrain, understanding how the height changes requires...
Average Value on a Rectangle
A snowfall map can represent how snow depth varies across a region, such as Colorado, over a fixed time period. Since different locations may receive different amounts of snow, the snowfall depth is described by a function of two variables. If f(x,y) represents the snow depth at a point in a rectangular region, then the average snowfall over the entire region is found by comparing the total accumulated snowfall with the area being measured.Total Snowfall over a RegionThe total snowfall over a...
