地球学报2026，Vol.47Issue(1)：17-30,14.DOI:10.3975/cagsb.2025.111721
假玄武玻璃的岩石磁学研究进展
A Review of Rock Magnetism of Pseudotachylyte
摘要
Abstract
Fault-related pseudotachylytes are critical for understanding seismic processes,as rock magnetic studies can elucidate the physicochemical properties and earthquake mechanisms of seismic faults.Building on recent advances in the rock magnetism of pseudotachylytes and incorporating findings from the Longmen Shan fault zone obtained by the author and their team,this study synthesizes recent advances in the rock magnetism of pseudotachylytes.The formation of magnetic materials in pseudotachylyte involves the transformation of paramagnetic minerals into ferromagnetic minerals(e.g.,magnetite and maghemite)under frictional heating at temperatures ranging from 400 ℃ to 1 300 ℃.Under high temperature(≥1 300℃)and strongly reducing conditions,iron oxides and sulfides decompose to form metallic iron.At ultrahigh temperatures(≥1 500 ℃),metallic iron further reacts with sulfur to produce monoclinic pyrrhotite.Analysis of magnetic fabric in pseudotachylytes provides valuable insights into paleoearthquakes mechanisms,paleostress orientation,and paleostrain characteristics.By integrating rock magnetism with paleomagnetism,geochemistry,numerical simulations,and microstructural analysis,key seismogenic parameters—such as coseismic frictional melting temperatures,seismogenic depths,redox conditions,and fluid interactions—can be constrained.A comprehensive approach combining rock magnetic analyses,nanoscale microscopy,microgeochemistry,high-to ultrahigh-temperature heating,and rapid shear experiments holds great promise for decoding the magnetic record of pseudotachylytes and retrieving direct physicochemical and stress information from seismic fault zones.关键词
假玄武玻璃/岩石磁学/磁组构/地震断裂作用Key words
pseudotachylyte/rock magnetism/magnetic fabric/seismic faulting分类
天文与地球科学引用本文复制引用
张蕾,李海兵,孙知明,曹勇..假玄武玻璃的岩石磁学研究进展[J].地球学报,2026,47(1):17-30,14.基金项目
本文由国家自然科学基金项目(编号:42230312 （）
42172262 （）
42372266)、地球深部探测与矿产资源勘查国家科技重大专项(编号:2024ZD1000500)和中国地质调查局地质调查项目(编号:DD20240041)联合资助. This study was supported by the National Natural Science Foundation of China(Nos.42230312,42172262,and 42372266),Deep Earth Probe and Mineral Resources Exploration-National Science and Technology Major Project(No.2024ZD1000500),and China Geological Survey(No.DD20240041). （编号:2024ZD1000500）
