基于地幔通道流理论的郯庐断裂东侧三个巨型成矿带地球物理特征与成矿背景探讨
作者:
基金项目:

本文为国家重点研发项目(编号2023YFC2906904)和中央级科研院所基本科研业务费重点攻关项目(编号JKYZD202303)联合资助的成果


Discussion on the geophysical characteristics and metallogenic background of three giant metallogenic belts on the eastern side of the Tanlu fault based on the mantle flow theory
Author:
  • 摘要
  • | |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • | |
  • 文章评论
    摘要:

    郯庐断裂东侧平行展布着长江中下游铜铁成矿带、胶东金矿成矿带及辽东多金属成矿带,它们间距近乎相等,是中国东部重要的金属资源富集区。本文基于重力、磁法、深反射地震及大地电磁等多尺度地球物理数据,剖析了三个成矿带在地幔岩石圈、地壳和近地表的地球物理特征。结合地幔通道流理论分析,认为成矿物质来源于地幔岩石圈深部,郯庐断裂作为幔源物质上涌的主要通道,与其东侧的长江断裂、胶北断裂、辽东断裂三个次级断裂共同控制了这三个成矿带。通过模型和实际资料分析了不同地球物理方法在幔源岩浆全程追踪中的优势和不足,认为地球物理探测可以获取地幔到地表的三维图像,可实现对幔源岩浆在岩石圈空间的全程追踪,有助于提升对不同尺度成矿系统“源- 运- 储”关键要素的识别能力。研究结果表明地球物理多方法联合可有效追踪幔源物质运移路径,为深部找矿提供理论支撑。

    Abstract:

    The three major metallogenic belts (Middle- Lower Yangtze River Valley Cu- Fe belt,Jiaodong Au belt, and Liaodong polymetallic belt) flanking the eastern side of the Tanlu fault zone exhibit near- equidistant parallel distribution and represent crucial metal enrichment zones in eastern China. Based on multi- scale geophysical datasets including gravity, magnetic, deep seismic reflection, and magnetotelluric surveys, this study systematically examines their geophysical characteristics spanning from mantle lithosphere through crust to near- surface domains. Our analysis integrating mantle channel flow theory reveals that: ① Metallogenic materials originated from deep mantle lithosphere; ② The Tanlu fault zone serves as the principal pathway for ascending mantle- derived materials, coordinating with secondary faults (Yangtze fault, Jiaobei fault, and Liaodong fault) to jointly control metallogenesis. Comparative evaluation of geophysical methods demonstrates complementary strengths in tracking mantle- derived magmas through crustal levels. Integrated application of gravity- magnetic- electromagnetic- seismic methods effectively traces mantle material migration pathways, while 3D geophysical imaging enables full- process monitoring from mantle sources to near- surface reservoirs, significantly enhancing identification capabilities for critical metallogenic system elements (source- transport- reservoir) across multiple scales. This integrated approach provides theoretical support for deep mineral exploration targeting.

    参考文献
    相似文献
    引证文献
引用本文

严加永,黄宗理,张昆,张辉,陈昌昕,王志辉,高磊,王晓娟.2025.基于地幔通道流理论的郯庐断裂东侧三个巨型成矿带地球物理特征与成矿背景探讨[J].地质学报,99(3):778-793.
YAN Jiayong, HUANG Zongli, ZHANG Kun, ZHANG Hui, CHEN Changxin, WANG Zhihui, GAO Lei, WANG Xiaojuan.2025. Discussion on the geophysical characteristics and metallogenic background of three giant metallogenic belts on the eastern side of the Tanlu fault based on the mantle flow theory[J]. Acta Geologica Sinica,99(3):778-793.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-10-12
  • 最后修改日期:2025-03-03
  • 录用日期:2025-03-03
  • 在线发布日期: 2025-03-31