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黄河中上游阶地对青藏高原东北部第四纪构造活动的反映
引用本文:刘百篪,刘小凤,袁道阳,郑文俊,郭华,曹娟娟.黄河中上游阶地对青藏高原东北部第四纪构造活动的反映[J].地震地质,2003,25(1):133-145.
作者姓名:刘百篪  刘小凤  袁道阳  郑文俊  郭华  曹娟娟
作者单位:1. 中国地震局兰州地震研究所,兰州,730000
2. 云南省地震局,昆明,650041
基金项目:国家重点基础研究发展规划项目 (G19980 4 0 70 10 4 )资助。
摘    要:黄河中上游河段是横贯整个“柴达木 -祁连山活动地块”的贯流水系。通过对青海共和至宁夏石嘴山段长约 180 0km的黄河中上游阶地的系统考察、阶地剖面实测和年代测定 ,绘制了该河段的阶地纵剖面图。综合分析各段的阶地级数、高度、年代及变形特征得到以下认识 :该流域可划分为若干个次级活动地块 ,表现在不同地块之间的阶地抬升幅度和速率存在较大差别 ;活动地块内部在较大程度上具刚性特征 ,表现在块体内部阶地级数、高度和形成年代基本相当 ;阶地纵剖面反映的本区活动地块自 1.6MaB .P .以来的抬升量大于 3.6~ 1.6MaB .P .的抬升量 ;柴达木 -祁连山活动地块距今 1万年以来和 15~ 2 0万年间存在 2次强烈的构造抬升运动

关 键 词:黄河  河流阶地纵剖面  活动地块  构造隆升  主夷平面
文章编号:0253-4967(2003)01-0133-13
修稿时间:2002年10月15

QUATERNARY TECTONIC ACTIVITY IN NORTHEASTERN QINGHAI-XIZANG PLATEAU AS REFLECTED BY RIVER TERRACES ALONG THE MIDDLE-UPPER REACH OF THE YELLOW RIVER
LIU Bai-chi LIU Xiao-feng YUAN Dao-yang ZHENG Wen-jun GUO Hua CAO Juan-juan Lanzhou Institute of Seismology,China Seismological Bureau,Lanzhou ,China Seismological Bureau of Yunnan Province,Kunming ,China$$$$.QUATERNARY TECTONIC ACTIVITY IN NORTHEASTERN QINGHAI-XIZANG PLATEAU AS REFLECTED BY RIVER TERRACES ALONG THE MIDDLE-UPPER REACH OF THE YELLOW RIVER[J].Seismology and Geology,2003,25(1):133-145.
Authors:LIU Bai-chi LIU Xiao-feng YUAN Dao-yang ZHENG Wen-jun GUO Hua CAO Juan-juan Lanzhou Institute of Seismology  China Seismological Bureau  Lanzhou  China Seismological Bureau of Yunnan Province  Kunming  China$$$$
Institution:LIU Bai-chi 1) LIU Xiao-feng 1) YUAN Dao-yang 1) ZHENG Wen-jun 1) GUO Hua 1) CAO Juan-juan 2) 1) Lanzhou Institute of Seismology,China Seismological Bureau,Lanzhou 730000,China 2)Seismological Bureau of Yunnan Province,Kunming 650041,China$$$$
Abstract:The middle-upper reach of the Yellow River is a flowing water system passing through the whole "Qaidam-Qilianshan active block". We systematically investigated the river terraces of the Yellow River of about 1 800km length from Gonghe of Qinghai to Shizuishan of Ningxia, measured about 73 cross sections of terraces and obtained 88 age data in total. In addition, we have compiled the vertical profiles of river terraces on this river segment, and carried out the comprehensive analyses of the number, heights
Keywords:Yellow River  vertical profile of river terraces  active block  uplifting rates  main planation surface
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