Crustal Reflection Profiling in Contrasting Archean Terrainsin Minnesota: The Oldest Crust in the U.S.

地球科学家面临的最大挑战之一是 破译太古代地壳的性质和起源，相信有 形成于最大的地壳形成期 一些 关于早期地壳成因的主要问题涉及地壳 厚度、水平和垂直构造体制及演化 (i.e.,底侵作用）、地壳加积作用和 莫霍 明尼苏达州的COCORP数据及其再分析 提供了重要的新信息的地下结构 太古代 该项目涉及一系列地震 反射实验旨在回答一些基本的 对太古代地壳演化及其性质的质疑 关于Moho 这些实验是基于一种创新的 多源P波和S波记录程序 记录和200-400接收器的精神PASSCAL和 使用PASSCAL以及主要研究人员自己的 记录系统。

One of the greatest challenges facing earth scientists is to decipher the nature and origin of Archean crust, believed to have formed during the greatest crustal-forming episode. Some of the major questions regarding early crustal genesis involve crustal thickness, horizontal vs vertical tectonic regimes and evolution (i.e., underplating), crustal accretion and the nature of the Moho. COCORP data from Minnesota and its reanalysis have provided important new information on the subsurface structure of the Archean. This project involves a series of seismic reflection experiments designed to answer some of the fundamental questions raised about Archean crustal evolution and the nature of the Moho. These experiments are based on an innovative recording program involving multiple sources p- and s-wave recording and 200-400 receivers in the spirit of PASSCAL and using PASSCAL as well as the principal investigators own recording systems.