摘要:
“模拟技术”是当今科学研究的主要手段之一,把它应用于地质学的某些方面,能取得很好的效果,如盆地模拟已经发展到了比较成熟的阶段。但在古地理和古地形再造方面,国内外在这方面的研究甚少,尤其是在三维模拟方面。根据Hay等(1989)提出的物质平衡理论,在给定时间间隔内,作用在研究区表面的构造、侵蚀和沉积过程所造成的沉积物的侵蚀总量与沉积总量之间物质守恒,与古地形再造和古地理重建相结合,用三维数值模型来模拟研究区域的变化过程,用GIS技术把这个变化过程的动态显示出来,是一项具有理论意义和实践意义的工作。
Abstract:
“Simulation technology” is an important tool for modern scientific research and has been applicable to geological research, e.g. basin simulation. According to mass-balanced palaeogeographic reconstructions proposed by Hay et al (1989), palaeogeography, palaeotopography and palaeobathymetry of a closed erosional depositional system can be reconstructed by restoring sedimentary masses to elevated surfaces in a drainage basin based on the inverse of present erosion equations and adjusting for isostasy, sea level changes, sediment compaction, and thermal subsidence. A mass balanced palaeogeographic reconstruction in integration with GIS techniques is a quantitative description of the configuration of the earth's surface at a moment in the geologic past based on sedimentary mass balance, and presents a three dimensional view of a sedimentary basin and its source area
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