首页|长江中下游成矿带中段构造格架与岩体分布:来自重磁多尺度边缘检测的认识

长江中下游成矿带中段构造格架与岩体分布:来自重磁多尺度边缘检测的认识

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长江中下游成矿带中段是我国东部重要的矿产资源基地,已经发现了九瑞、庐枞、铜陵、安庆—贵池等多个矿集区,找矿潜力巨大,但区域断裂等构造格架和岩体分布还不是很清楚,制约了进一步的找矿工作.重磁场蕴涵了地下各类不同密度、磁性地质体信息,并具有覆盖范围广的特点,是研究构造格架和岩体分布的主要数据.本文采用多尺度边缘检测方法,对长江中下游中段的区域重力和航磁数据进行边缘检测,获得了不同埋深不同尺度磁性体和密度体的边界,识别出断裂和火山岩盆地边界,圈定不同基性程度岩体分布范围,建立了区域构造格架.在此基础上,结合地质资料分析了成矿前景,研究成果为长江中下游成矿带中段新一轮找矿工作提供了依据.
Tectonic framework and rock mass distribution in the middle section of the middle and lower reaches of the Yangtze River:from the understanding of gravity and magnetic multi-scale edge detection
The middle section of the mineralization belt in the middle and lower reaches of the Yangtze River is an important mineral resource base in eastern China.Although multiple ore concentration areas such as Jiurui,Luzong,Tongling,and Anqing Guichi have been discovered,there is still huge potential for mineral exploration.However,the structural framework and rock mass distribution of regional faults are not yet clear,which restricts further mineral exploration work.The gravity and magnetic fields contain information about various underground magnetic and magnetic geological bodies with different densities.This paper uses a multi-scale edge detection method to detect the edges of regional gravity and aeromagnetic data in the middle and lower reaches of the Yangtze River,and obtains the boundaries of magnetic and density bodies with different burial depths.Based on the multi-scale edge detection results of gravity and magnetism,the following conclusions have been drawn:1.A total of 6 inferred faults,12 inferred rock mass boundaries based on gravity,12 inferred rock mass boundaries based on magnetic force,and two inferred volcanic rock basin boundaries have been identified.2.Delineate the distribution range of the rock mass.It is speculated that there are concealed rocks in the area of Duchang Hukou Xingzi County De'an County Ruichang South,Dongzhi County Pengze County,the northwest and southeast of Jingdezhen,and under Tongling.3.The distribution range of the volcanic rock belt is from Luzong to Susong,and there is a great potential for hidden mines at the southern and western ends.Based on geological data,the ore-forming prospects were analyzed,providing a basis for a new round of ore exploration work in the middle and lower reaches of the Yangtze River ore-forming belt.

Gravity and magnetic fieldsMulti-scale edge detectionThe middle section of the middle and lower reaches of the Yangtze RiverTectonic frameworkRock mass distribution

佘京瑾、严加永、祁光、王栩、刘家豪、余爱民

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中国地质科学院,北京 100037

中国地质大学(北京),北京 100083

东华理工大学,南昌 330013

重磁场 多尺度边缘检测 长江中下游中段 构造格架 岩体分布

国家自然基金项目中国地质调查局地质调查项目中国地质调查局地质调查项目

U2344220DD20230008DD20221643

2024

10.6038/pg2024HH0175

地球物理学进展
中国科学院地质与地球物理研究所 中国地球物理学会

地球物理学进展

CSTPCD北大核心
影响因子：1.761
ISSN：1004-2903
年,卷(期)：2024.39(1)
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