| 燕山地区重、磁场特征分析与构造分区 |
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| 引用本文：张季生,王海燕.2005.燕山地区重、磁场特征分析与构造分区[J].地球学报,26(4):349-354. |
| DOI：10.3975/cagsb.2005.04.10 |
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| 基金项目:中国地质调查局项目“燕山造山带反射地震剖面”（编号：200213000040）;国土资源部中国岩石圈三维结构专项计划,中国岩石圈三维结构数据库项目（编号：200010101） |
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| 中文摘要:本文对燕山地区的重、磁异常进行了处理与分析，根据重力场和磁场特征提出整个研究区分为4个部分。由北往南为：丰宁-隆化断裂带以北地区；丰宁-隆化断裂带至密云平泉之间的地区；密云-平泉至三河-昌黎之间的地区；三河-昌黎以南的平原区。丰宁-隆化断裂带为内蒙地轴（即华北地台北缘隆起带）南部边缘的界线。丰宁-隆化和三河-昌黎密度陡变带，以及密云-半壁山密度陡变带可能延深至中地壳。承德县-平泉密度陡变带延深比前面的密度陡变带略浅一些。 |
| 中文关键词:燕山地区 重力异常 磁异常 构造分区 |
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| Gravity and Magnetic Characteristics and Tectonic Divisions of the Yanshan Area |
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| Abstract:It is held that Yanshan area can be divided into four different parts according to gravity and magnetic features. They are from north to south ① area north of Fengning-Longhua faulted zone, ②area between Fengning-Longhua faulted zone and Miyun-Banbishan-Chengde-Pingquan district, ③ area between Miyun-Banbishan-Chengde-Pingquan district and Sanhe-Changli district, and ④area south of Sanhe-Changli district. The Fengning-Longhua faulted zone is the southern boundary of the Inner Mongolia geological axis. The three density drastically-changing zones (Fengning-Longhua, Miyun-Banbishan, and Sanhe-Changli) may extend deeply into the middle crust, and the Chengde-Pingquan zone may be somewhat shallower than the above three zones. |
| keywords:Yanshan area gravity anomaly magnetic anomaly tectonic division |
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