Publication Date:
2023-06-09
Description:
A rock salt-lamprophyre dyke contact zone (sub-vertical, NE-SW strike) was investigated for its petrographic, mechanic and physical properties by means of anisotropy of magnetic susceptibility (AMS) and rock magnetic properties, coupled with quantitative microstructural analysis and thermal mathematical modelling. The quantitative microstructural analysis of halite texture and solid inclusions revealed good spatial correlation with AMS and halite fabrics. The fabrics of both lamprophyre and rock salt record the magmatic intrusion, "plastic" flow and regional deformation (characterized by a NW-SE trending steep foliation). AMS and microstructural analysis revealed two deformation fabrics in the rock salt: (1) the deformation fabrics in rock salt on the NW side of the dyke are associated with high temperature and high fluid activity attributed to the dyke emplacement; (2) On the opposite side of the dyke, the emplacement-related fabric is reworked by localized tectonic deformation. The paleomagnetic results suggest significant rotation of the whole dyke, probably during the diapir ascent and/or the regional Tertiary to Quaternary deformation.
Keywords:
Anisotropy-magnetic susceptibility, factor F, foliation; Anisotropy-magnetic susceptibility, factor L, lineation; Anisotropy-magnetic susceptibility, factor P, anisotropy degree; Anisotropy-magnetic susceptibility, factor Pj; Anisotropy-magnetic susceptibility, factor T; Anisotropy-magnetic susceptibility, factor U; Declination of principle axis K1; Declination of principle axis K2; Declination of principle axis K3; Description of symmetrical anisotropy of magnetic susceptibility tensor; Distance; Geological sample; GEOS; Inclination of principle axis K1; Inclination of principle axis K2; Inclination of principle axis K3; LM4; Magnetic field strength; Mina Campina de Cima, Algarve basin, Portugal; Operation mode; Rock type; Salt mine; Sample code/label; Susceptibility
Type:
Dataset
Format:
text/tab-separated-values, 1368 data points
