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Ladakh batholith emplacement mechanism based on analysis of magnetic fabric and mineralogy.

Satyakumar AV, Venkateshwarlu M.

PHYSICS OF THE EARTH AND PLANETARY INTERIORS

https://doi.org/10.1016/j.pepi.2026.107500 

Anisotropy of Magnetic Susceptibility (AMS), rock magnetism, and petrology studies are conducted to reveal the emplacement mechanism of the Ladakh Batholith. AMS study reveals that the magnetic fabric is reliable for ~NW-SE trending magma flow. The rock magnetic and petrological results reveal that Ti magnetite pseudo-single-domain is the dominant magnetic mineral in the Ladakh batholith, with quartz, biotite, and feldspar also present. The magnetic fabrics show concentric magnetic lineations and foliations that appear to follow the boundaries of plutons and mostly represent the movements of magma chambers. This study reveals that the Ladakh batholith may have grown through multi-stage interactions between host Ladakh granitoids and several coeval mafic and felsic magmatic pulses.

Fig: The distribution of the principal susceptibility axes (K1, K2, K3) along with confidence ellipses and their related means.

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