摘要
基于SRTM3-DEM数据，运用ArcGIS技术，采用空间分析、三维地表形态分析和剖面形态分析方法，结合野外调查，对克拉玛依盆地以西、塔域盆地以东的西准噶尔山地的地貌结构进行了初步研究，划分出4级夷平面，讨论了各级夷平面的特征，依据地表特征分析对研究区内的构造地貌区进行了划分。4级夷平面海拔高度分别是2734-1760m、1520-1200m、1000-300m和800660m。参考地表面三维统计得到的拐点（1320m／1270m），将1270m以上地貌面分为2级夷平面：1760m以上夷平面（I）和1520-1200m夷平面（II），地形起伏度均在500-200m以内。Ⅱ级夷平面可能发育于白垩纪至新近纪，山地剥蚀的后期与新近系昌吉河群相对比。1000m以下分为两级剥蚀面，其中之一，剥蚀面高度1000-660m，并一直延伸至300m高度，为一变形的山麓及山前剥夷面（III）。该剥蚀面具有埋藏剥蚀面性质，形成于中更新世一晚更新世。另一级山间剥蚀面出现在860-660m高度上（Ⅳ），发育于晚更新世后期至全新世。4级夷平面代表了山地的4次稳定时期与其间的4次快速抬升，第Ⅲ级剥蚀面的变形记录了青藏高原晚第四纪隆升的远程效应。不同分区之间的构造地貌差异为区域构造分析提供了有价值的分区信息，构成区域构造分区中的一个重要因素。区域研究表明，西准噶尔山地的总体构造线方向呈NE向展布，其与东部的准噶尔盆地和西部塔城盆地及以西地区的NW向构造线方向明显不同，受控于数条NE向断裂的南部扎伊尔山地与北部吾尔喀什尔山地的盆一山间列的构造地貌组合构成了区域南、北之间的对比。依据DEM所做的地表特征分析，把研究区分为北部中山与盆地间列区（I-1）、南部中低山区（I-2）和东南部山缘及山前平原区（Ⅱ）3个构造地貌区。西准噶尔山地（I区）属于天山-准噶尔-萨彦-贝加尔构�
By using spatial analysis, three dimensional surface analysis, profile shape analysis and the platform of Arc GIS based on SRTM3-DEM data, and combining with field geological survey, the geomorphologic structures of West Junggar Mountain between the western part of Karamay Basin and the eastern part of Tacheng Basin are studied; the planation surfaces are divided into four levels, and their structural geomorphologic features are discussed; and three subareas of structural geomorphology are divided. There are at least four levels of planation surfaces in the mountain, which appear on 2734 - 1760 m, 1520 - 1200 m, 1000 - 300 m and 800 - 660 m above the sea level. Two planation surfaces, at over I 760 m above the sea level （the level I ） and at between 1520 m and 1200 m above the sea level （the level II ） respectively, were detected based on the inflection point obtained in three dimensional statistics for the ground surface （at 1320 m/1270 m above the sea level）, and both undulations of them are of no more than 500 - 200 m. The level II was shaped in the Cretaceous- Neogene Period, and the later period of denudation coincided with Changjihe Group shaped in the Neogene Period. There are two denudation planes under the inflection point. One of them exits in 1000 - 660 m and extends to 300 m above the sea level, and it is a deformed denudation plane existing at the foothill and the front of mountain（the level III ）, and it was shaped during the Middle Pleistocene to the Late Pleistocene and buried by the pluvial-alluvial deposits of the Late Pleistocene - Holocene Epoch. The other appears in 860 - 660 m above the sea level（the level IV ）, it was shaped during the Late Pleistocene- Holocene Epoch as the pluvial alluvial deposits of the Late Pleistocene Epoch have been whittled down. The above four level planations represent four stable periods and four rapid uplift periods among planations, but the deformation of level III recorded a response of the uplift of Qinghai - Tibet Plateau during the Late
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2013年第5期256-263,共8页
Earth Science Frontiers
基金
中国地质调查局地质调查项目"新疆1:25万铁厂沟镇幅
克拉玛依市幅区调修测"(1212011120502)和"西准噶尔克拉玛依后山地区深部地质调查"(1212011220245)
山东省高等学校科技计划项目(J11LE12)
关键词
数字高程模型（DEM）
夷平面
构造地貌分区
西准噶尔山地
digital elevation model （DEM）
planation
partition of tectonic geomorphology
western JunggarMountain
