武威-天祝-庄浪河NNW向断裂分段及变形特征
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摘要
在野外专题考察、大比例尺活断层地质填图、高精度地质剖面及阶地剖面实测的基础上，较系统地讨论了武威－ 天祝－ 庄浪河ＮＮＷ 向断裂的活动时代、变形方式及分段特征。结果表明： 该断裂带是一条典型的全新世活动断裂，整个断裂可分为不同几何结构、不同构造类型、不同变形特征的南、中、北三个断层段。其中北段和中段为隐伏断层，发育有第四纪活动褶皱和１９２７ 年古浪８ 级地震破裂带；南段断裂呈弧形几何形态展布，显示了逆断层构造面的基本特征
In this paper, the active date, deformation way and segmentation of Wuwei Tianzhu Zhuanglanghe fault zone are systematically discussed on the basis of the recently special field studies, including the large scale geologic mapping, geologic profile measuring, as well as deformated terrace measuring. The result shows that this fault zone can be divided into three segments, south, middle and north segment, each one has itself different geometric structure, structural type and deformation character. Among them, the north and middle segment are the hidden fault, developing the surface rupture of 1927 Gulang great earthquake and the quaternary active folding, and the south segment shows arcuate geometric pattern and displaies the basic character of compressive deformation of thrust fault.
In this paper, the active date, deformation way and segmentation of Wuwei Tianzhu Zhuanglanghe fault zone are systematically discussed on the basis of the recently special field studies, including the large scale geologic mapping, geologic profile measuring, as well as deformated terrace measuring. The result shows that this fault zone can be divided into three segments, south, middle and north segment, each one has itself different geometric structure, structural type and deformation character. Among them, the north and middle segment are the hidden fault, developing the surface rupture of 1927 Gulang great earthquake and the quaternary active folding, and the south segment shows arcuate geometric pattern and displaies the basic character of compressive deformation of thrust fault.
引文
1 中国地震局兰州地震研究所. 昌马活动断裂带,北京: 地震出版社,1992 .
2 中国地震局地质研究所. 祁连山- 河西走廊活动断裂系. 北京: 地震出版社,1993 .
3 李玉龙,候珍清,康哲民. 中国西北陕甘宁青地震区划.兰州: 甘肃人民出版社,1986 .
4 Schum m SA.Geologicimplicationsofriverpattern variability (abstract) .Am ,Assoc.Petrol,Geol.1972 ,56 :652 .
5 Schum m SA.Evolution and response ofthefluvialsystem .Sedimentologicimplication ,Soc.Econ .Paleontol,Spec.Publ.1981 ,31 :19 ～29.
6 ChattersJC, Hoover KA.Response ofthe Columbia riverfluvialsystem to Holocene climatechange.Quaternary Research ,1992 ,37 :42 ～59 .
7 Pazzaglia FJ,Gardner T W.Fluvialterraces ofthelowersusquehanna river. Geomorphology,1993 ,8(2) :83～113 .
8 杨景春,谭利华,李有利,等. 祁连山北麓河流阶地与新构造演化. 第四纪研究,1998 ,3,229 ～237.
9 陈杰,卢演俦,丁国瑜. 祁连山西段及酒西盆地区第四纪构造运动的阶段划分. 第四纪研究,1996 ,3 ,263～271 .
10 李有利,杨景春. 河西走廊平原区全新世河流阶地对气候变化的响应. 地理科学,1997 ,13(3) :248 ～252 .
11 李吉均,方小敏,马海洲,等. 晚新生代黄河上游地貌演化与青藏高原隆起. 中国科学(D 辑) ,1996 ,26(4) :316 ～322 .
12 程绍平,邓起东,闵伟,等. 黄河晋陕峡河流阶地和鄂尔多斯高原第四纪构造运动. 第四纪研究,1998 ,3 ,238 ～248 .
2 中国地震局地质研究所. 祁连山- 河西走廊活动断裂系. 北京: 地震出版社,1993 .
3 李玉龙,候珍清,康哲民. 中国西北陕甘宁青地震区划.兰州: 甘肃人民出版社,1986 .
4 Schum m SA.Geologicimplicationsofriverpattern variability (abstract) .Am ,Assoc.Petrol,Geol.1972 ,56 :652 .
5 Schum m SA.Evolution and response ofthefluvialsystem .Sedimentologicimplication ,Soc.Econ .Paleontol,Spec.Publ.1981 ,31 :19 ～29.
6 ChattersJC, Hoover KA.Response ofthe Columbia riverfluvialsystem to Holocene climatechange.Quaternary Research ,1992 ,37 :42 ～59 .
7 Pazzaglia FJ,Gardner T W.Fluvialterraces ofthelowersusquehanna river. Geomorphology,1993 ,8(2) :83～113 .
8 杨景春,谭利华,李有利,等. 祁连山北麓河流阶地与新构造演化. 第四纪研究,1998 ,3,229 ～237.
9 陈杰,卢演俦,丁国瑜. 祁连山西段及酒西盆地区第四纪构造运动的阶段划分. 第四纪研究,1996 ,3 ,263～271 .
10 李有利,杨景春. 河西走廊平原区全新世河流阶地对气候变化的响应. 地理科学,1997 ,13(3) :248 ～252 .
11 李吉均,方小敏,马海洲,等. 晚新生代黄河上游地貌演化与青藏高原隆起. 中国科学(D 辑) ,1996 ,26(4) :316 ～322 .
12 程绍平,邓起东,闵伟,等. 黄河晋陕峡河流阶地和鄂尔多斯高原第四纪构造运动. 第四纪研究,1998 ,3 ,238 ～248 .
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