Plate tectonic reconstructions with continuously closing plates
Plate tectonic reconstructions with continuously closing plates
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DOI：
10.1016/j.cageo.2011.04.014
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发表时间：
2012-01-01
影响因子：
4.4
通讯作者：
Bower, Dan J.
中科院分区：
文献类型：
--
作者：
Gurnis, Michael;Turner, Mark;Bower, Dan J.
我们提出了一个新的算法建模的一组自洽的全球板块多边形。每个板块多边形都由一个有限的板块边缘列表组成，所有这些边缘都具有不同的欧拉极点。我们引入了一个“连续封闭板”（CCP），这样，每个边缘独立移动，板多边形保持封闭的几何作为时间的函数。该方法解决了计算地球动力学中将联合收割机运动学模型与动力学模型相结合的新需求。由于它们的多边形在时间上间隔太远，并且边缘和板块之间的运动不一致，传统的全球板块构造重建已经不足以满足地球动力学的需要。CCP算法已被纳入GPlates开源古地理系统。该算法是一组程序和数据结构，操作的集合重建的几何数据，形成封闭的板多边形;用于每个板多边形的主要数据结构是基于嵌套层次结构的拓扑元素。可以使用GPlates创建、编辑、可视化和导出具有CCP的重建。动态重建的本地存储是GPlets标记语言，GPML，它使用一种称为GML的基于XML的文件格式。我们证明了CCP方法的实用性，通过创建一个全球重建与不断关闭板从140马到现在使用现有的，传统的重建数据。(C)2011爱思唯尔有限公司保留所有权利。
We present a new algorithm for modeling a self-consistent set of global plate polygons. Each plate polygon is composed of a finite list of plate margins, all with different Euler poles. We introduce a "continuously closed plate" (CCP), such that, as each margin moves independently, the plate polygon remains closed geometrically as a function of time. This method solves emerging needs in computational geodynamics to combine kinematic with dynamic models. Because they have polygons that are too widely spaced in time and have inconsistent motions between margins and plates, traditional global plate tectonic reconstructions have become inadequate for geodynamics. The CCP algorithm has been incorporated into the GPlates open-source paleogeographic system. The algorithm is a set of procedures and data structures that operate on collections of reconstructed geometric data to form closed plate polygons; the main data structures used for each plate polygon are based on a nested hierarchy of topological elements. Reconstructions with CCPs can be created, edited, visualized, and exported with GPlates. The native storage of the dynamic reconstructions is the GPlates Markup Language, GPML, which uses an XML-based file format called GML. We demonstrate the utility of the CCP method by creating a global reconstruction with continuously closing plates from 140 Ma to the present using data from existing, traditional reconstructions. (C) 2011 Elsevier Ltd. All rights reserved.