A Study about the Basement Structure of Daba Mountain Region Based on the Aeromagnetic Data
BIE Lu
LI Jun
Abstract：The authors processed the latest 1: 200 000 airborne magnetic data of Dabashan area, analyzed the aeromagnetic anomaly characteristics, and found out the evidence of the existence of magnetic crystalline basement; through parker boundary layer quantitative inversion method, the authors calculated the depth and scope of the magnetic crystalline basement, and determined that the crystalline basement of Sichuan basin extended to the Ankang-Zhushan fracture community in the north-east direction, meanwhile the authors redefined the northeastern boundary of basin, calculated the napped distance of Daba Mountain nappe of about 100 km, and presumed that there might existed sedimentary strata below the nappe. The conclusions could provide a reference for the system analysis of the relationship between deep and shallow structure and the long-range perspective of oil and gas exploration in Sichuan Basin.
Keywords：Daba tectonic zoneAeromagnetic anomaliesParker boundary layer inversionMagnetic crystalline basementNortheast border of Sichuan basin
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 96-102 )