|
|||||
|
|
| 庐枞火山岩盆地及其外围重、磁场特征 | |
| 引用本文： | 张季生,高锐,李秋生,管烨,彭聪,李朋武,卢占武,侯贺晟.庐枞火山岩盆地及其外围重、磁场特征[J].岩石学报,2010,26(9):2613-2622. |
| 作者姓名： | 张季生 高锐 李秋生 管烨 彭聪 李朋武 卢占武 侯贺晟 |
| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037;中国地质科学院深部探测与地球动力学开放实验室,北京,100037 2. 中国地质科学院矿产资源研究所,北京,100037 3. 中国地质科学院地质研究所,北京,100037 |
| 基金项目： | 本文受国家深部探测技术与实验研究专项(SINOPROBE-02、SINOPROBE-08-02)、财政部科学专项(140102)、国家自然科学基金重点项目(40830316)、国家自然科学基金项目(40774026、40704016、40874045)、中国地质调查局地质调查工作项目(1212010611809、1212010711813、1212010811033)、国土资源部公益性科研专项经费项目(200811021)和基本科研业务费项目(J0803、J0916)联合资助. |
| 摘 要： | 为探测长江中下游成矿带庐江-枞阳白垩纪火山岩盆地的深部构造和地壳结构,2007年初在庐枞火山岩盆地进行了以深反射地震剖面探测为主的,新一轮重力、磁力和大地电磁剖面测量。作者在前人研究的基础上对庐枞火山岩盆地及其外围重、磁场特征进行了研究。作者首先分析长江中下游地区重、磁场的分布特征,然后以区域重、磁场特征为背景来认识庐枞地区重、磁场的分布特征。研究各类地质体的物性参数是开展地球物理解释的前提,文中收集并分析了前人对庐枞地区的岩石物性的较为系统研究成果。为了提取重、磁异常的特征,文中对重、磁异常进行了位场转换和图像处理。利用新的深反射地震剖面探测和大地电磁剖面研究成果,采用定性和定量解释方法对庐枞地区重、磁场的分布特征进行了研究并提出新的认识。庐枞火山岩盆地深部存在隐伏的磁性强的中碱性岩类是产生区域磁异常的主要原因。庐枞火山岩盆地下部火成岩所侵入的地层向盆地东南方向延伸,盆地的西北边界向东南方向倾斜。而在罗河断裂带以西没有火成岩存在。亦即庐枞火山岩盆地是一个沿北东向罗河断裂向东发育的非对称火山盆地。另外,在庐枞火山岩盆地西部边缘罗河深部存在切穿莫霍面的断裂带沿北东向延展数十千米。 |
| 关 键 词： | 庐枞火山岩盆地 重力异常 磁异常 重力模拟计算 磁模拟计算 |
| 收稿时间： | 7/8/2010 12:00:00 AM |
| 修稿时间： | 2010/8/19 0:00:00 |
Charcacteristics of gravity and magnetic field of Luzong volcano basin and its periphery. |
|
| ZHANG JiSheng,GAO Rui,LI QiuSheng,GUAN Ye,PENG Cong,LI PengWu,LU ZhanWu and HOU HeSheng.Charcacteristics of gravity and magnetic field of Luzong volcano basin and its periphery.[J].Acta Petrologica Sinica,2010,26(9):2613-2622. | |
| Authors: | ZHANG JiSheng GAO Rui LI QiuSheng GUAN Ye PENG Cong LI PengWu LU ZhanWu and HOU HeSheng |
| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory, Chinese Academy of Geology Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory, Chinese Academy of Geology Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory, Chinese Academy of Geology Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory, Chinese Academy of Geology Sciences, Beijing 100037, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory, Chinese Academy of Geology Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory, Chinese Academy of Geology Sciences, Beijing 100037, China |
| Abstract: | In order to explore the crustal structure of Lujiang-Zongyang volcanic basin in Middle-Lower Yangtze rift metallogenic belt during Cretaceous, deep reflection seismic, magnetotelluric, magnetic and gravity profiles through volcanic basin were finished in 2007. On the basis of the new data, we study the feature of gravity and magnetic anomalies of Luzong volcanic basin and its periphery. We analyzed the gravity and magnetic anomalies of in Middle-Lower Yangtze rift area firstly. We analyze the rock physical characteristics, and process the gravity and magnetic data in Luzong area by using transformation of potential field and image processing technique. Gravity and magnetic modeling is restricted in the deep reflection seismic data. We suggest that the phenomena of high regional magnetic anomaly are mainly caused by the intermediate-alkaline rocks buried in the Luzong volcano basin. The research results of the gravity and magnetic models and the feature of gravity and magnetic anomalies support the idea that the "ear-shape" Luzong basin was a dissymmetrical basin along Luohe fault with north-east strike direction and eliminated the judgment that another half basin was buried, below red layer, west side of Luohe fault. In addition, the Luohe fault, which cuts across the MOHO, trend several ten kilometers in the direction of NE. |
| Keywords: | Luzong volcano basin Gravity anomaly Magnetic anomaly Density modeling Magnetic modeling |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《岩石学报》浏览原始摘要信息 | |
| 点击此处可从《岩石学报》下载免费的PDF全文 | |