物探化探计算技术2026，Vol.48Issue(2)：289-297,9.DOI:10.12474/wthtjs.20250402-0001
基于重力聚焦反演的红河断裂深部结构特征
Deep structural characteristics of the Red River Fault based on gravity-focused inversion
摘要
Abstract
To effectively investigate the deep structural characteristics of the Red River Fault Zone,this study employs the L0-norm gravity focusing inversion method,obtaining a three-dimensional density structure of the deep crust and upper mantle beneath the fault zone.The density model reveals a prominent northwest-southeast(NW-SE)trending low-density gradient belt beneath the Red River Fault,approximately 80 km wide and extending to the top of the upper mantle,indicating the migration of mantle-derived melts along the fault zone.Furthermore,the three-dimensional density structure demonstrates distinct differences in density patterns between the northern and southern segments of the Red River Fault.However,in the central segment,negative density anomalies clearly cross the fault and extend into the South China Block,suggesting that mantle-derived melts have intruded into the South China Block through the fault zone.These results imply that the Red River Fault,as a lithospheric-scale deep fault,is closely linked to deep-seated magmatic activity under the influence of the Indian Plate subduction.This finding provides critical insights into crust-mantle material interactions beneath the fault and the evolution of regional mineral deposits.关键词
红河断裂/重力异常/聚焦反演/密度结构Key words
Red River Fault Zone/gravity anomaly/focusing inversion/density structure分类
天文与地球科学引用本文复制引用
佘艾东,李军,曲哲,李茂茹..基于重力聚焦反演的红河断裂深部结构特征[J].物探化探计算技术,2026,48(2):289-297,9.基金项目
国家自然科学基金面上项目(4227040732) （4227040732）
