中南阿拉斯加构造地质特征  

Regional geological characteristics in Alaska

作　　者：大卫·卡尔·施耐德 戴长雷(译)[2,3] 杨朝晖(译)[1] 

机构地区：[1]阿拉斯加大学安克雷奇分校,阿拉斯加州安克雷奇99508 [2]黑龙江大学寒区地下水研究所,黑龙江哈尔滨150080 [3]黑龙江大学水利电力学院,黑龙江哈尔滨150080

出　　处：《黑龙江水利》2016年第10期24-27,共4页

基　　金：中科院寒旱所冻土工程国家重点实验室开放基金项目(NO.SKLFSE201310);国家自然科学基金项目(NO.1202171)

摘　　要：弄清楚全球背景下的区域地质特征,有利于理解阿拉斯加复杂的地质现象。在梳理地质体形成的基础上,对阿拉斯加中南部地区的地质体、断层以及地壳情况进行说明。指出:中南阿拉斯加绝大部分的地质体起源于遥远南方的火山岛弧及其侵蚀沉积物。在中南阿拉斯加,最古老的地质体位于北部更靠近北美克拉通的地方。通常情况下,距克拉通越远,地质体的地质年龄就会越年轻。威廉王子地质体和亚库塔特地质体是本地区最年轻的地质体;阿拉斯加南部地区地断层有许多种成因。在古俯冲区中、地质体内、裂谷带沿线以及两个板块侧面相对运动滑擦的地区,皆可发现断层;中南阿拉斯加的地质情况相当复杂。Understanding the place of Alaska in the big picture of Earth＇s geology is conducive to understand it＇s complicated geology. This paper explains the terranes, the faults and the crust in Southcentral Alaska on the basis of combing the formation of terranes foundation. It points out： Most of Southcentral Alaska＇s terranes originated far to the south as volcanic island arcs and the sedimentary material that eroded off of them. In Southcentral Alaska, the oldest terranes are located in the north, closer to the North American Craton. Generally, the farther from the carton, the younger the age of the terrane. The youngest terranes are the Prince William and Yakutat Terranes; The faults of southern Alaska from for many reasons. They can be found in ancient subduction zones, within terranes, along rift zones or regions where two plates slide alongside each other~ The geology of Southcentral Alaska is fairly complicated.

关 键 词：地质体 断层 地壳 地质 中南阿拉斯加 

分 类 号：P54[天文地球—构造地质学]