宁芜盆地深部地壳结构和岩浆侵入体形态特征及其对成矿的启示

发布时间：2018-03-17 19:11

本文选题：深部探测　切入点：地壳结构　出处：《地学前缘》2017年05期 　论文类型：期刊论文

【摘要】：在宁芜火山岩盆地部署了三条深反射地震剖面,通过精细的数据采集和处理,最终获得了高质量且可靠的深反射地震和初至波层析反演速度剖面。依据对反射结构和速度特征的分析,获得了以下认识:(1)利用层析反演速度成果刻画了岩浆侵入体在宁芜盆地深部空间的大体形态和分布范围;(2)依据深反射地震剖面反射同相轴和莫霍面结构特征,大体确定了深部岩浆侵入通道路径;(3)宁芜火山岩盆地下部地壳在6.0s上下位置发生解耦,在盆地正下方形成了地壳级别的鳄鱼嘴构造,控制着宁芜火山岩盆地深部的岩浆和构造活动;(4)阐明了宁芜火山岩盆地深部地壳结构和变形特征。这些成果的发现对探讨宁芜火山岩盆地深部成矿和动力学过程研究具有重要意义。
[Abstract]:Three deep reflection seismic sections were deployed in the Ningwu volcanic basin, which were collected and processed by fine data. Finally, high quality and reliable deep reflection seismic and first arrival tomography inversion velocity profiles are obtained. Based on the analysis of reflection structure and velocity characteristics, The following knowledge is obtained: (1) the gross morphology and distribution range of magmatic intrusions in the deep space of Ningwu Basin are described by using the velocity data of tomography inversion)) according to the reflection cophase axis of deep reflection seismic profile and the structural characteristics of Moho surface, The path of deep magma intrusion channel is roughly determined.) the lower crust of Ningwu volcanic basin is decoupled at about 6.0s, and a crustal level crocodile mouth structure is formed directly below the basin. The crustal structure and deformation characteristics of Ningwu volcanic basin are elucidated by controlling the magmatic and tectonic activities in the deep part of the Ningwu volcanic basin. The discovery of these results is helpful to the exploration of the deep metallogenic and dynamic processes in the Ningwu volcanic basin. The research is of great significance.
【作者单位】：中国地质科学院矿产资源研究所国土资源部成矿作用和资源评价重点实验室;中国地质调查局中国地质科学院地球深部探测中心;中国地质科学院地球物理地球化学勘查研究所;
【基金】：国家“深部探测技术与实验研究专项(SinoProbe)”第3项目“深部矿产资源立体探测技术与实验研究”第02课题(SinoProbe-03-02) 国家重点研发计划课题(2016YFC0600201,2016YFC0600208) 中国地质调查局地质调查项目(12120114053301) 中国地质科学院基本科研业务项目(K1616)
【分类号】：P631.4

【相似文献】