应用物探推断兰州金城关断裂及其倾角

英文篇名：INFERRRING JINCHENGGUANG FAULT OF LANZHOU AND ITS DIP ANGLE BY USING THE GEOPHYSICAL PROSPECTING METHOD
中文刊名：甘肃地质
英文刊名：Gansu Geology
作者：王志林 ; 李百祥
英文作者：WANG Zhi-ling ; LI Bai-xiang(No.2 Geology and Mineral Exploration Team ; Gansu Provincial Bureau of Geology and Mineral Exploration and Development ; Lanzhou 730020 ; China)
中文关键词：金城关断裂 ; 重力推断 ; 断裂倾角 ; 盆山耦合动力学模式
英文关键词：Jinchengguan fault ; Gravity inference ; Dip angle of fault ; Basin and mountain coupling dynamics model
出版日期：2006-05-30
机构：甘肃省地矿局第二地勘院,甘肃省地矿局第二地勘院甘肃兰州730020,甘肃兰州730020
年：2006
期：01
出版单位：甘肃地质

摘要

据重力场特征分析,将地质划分的金城关—砂金坪断裂,推断分解为金城关断裂与雁滩南—柳沟店隐伏断裂,这是两条平行斜列展布的断裂。其中以密集重力梯级带反映金城关断裂特征最明显,进而利用重力水平一阶导数、二阶导数和垂直一阶导数求解断层接触带总体产状。结合区域应力场特征及盆山耦合动力学模式,推断断裂在深部是北倾的逆断裂,与地震波速场反映断裂产状吻合。
By studying the characteristics of gravity field, Jinchengguan-Shajinping fault which was named from geology is inferred into Jinchengguan fault and South Yantan Liudiangou hidden fault,two faults which parallel and spread diagonally.The intensive gravity stepped zone shows that the characteristics of Jinchengguan fault are obvious.The calculations of the first order and the second order derivations of gravity,and the first order derivation of vertical conclude that the overall strike of fault contact zone is steep,and it inferred that the fault is a north-dipped reverse fault in deep by combination of regional stress field and basin and mountain coupling dynamics model.This inference result meets the strike-dip of fault concluded by velocity field of seismic waves.

引文

[1]扬礼显,刘承昌.兰州市古河道及有关地质问题[J].甘肃师大学报(自然科学版).1979(2).
    [2]侯珍清,王多杰.兰州金城关断裂带的新活动性与地震[J].西北地震学报,1985(2).
    [3]吕鸿图,许慧宁.兰州河谷盆地性质及其成因研究[J].兰州大学学报(自然科学版),1992(1).
    [4]王进保,等.兰州孔家崖断裂活动特征[J],西北地震学报,1996(9).
    [5]R.格林.应用重力法准确确定地质体接触面的倾角[J].物探与化探,1978(1).
    [6]吕庆云译.用梯度法解释地质体接触带重力异常的简易方法[J].Geophysics?J?1977.vol42,no6.
    ①袁道阳等。兰州地区地震地质环境研究,中国地震局兰州地震局。2001,3。