Geochronologic and geochemical constraints of the petrogenesis of Permian mafic dykes in the Wuding area, SW China: Implications for Fe–Ti enrichment in mafic rocks in the ELIP

Mafic dykes are widely distributed and well preserved in the Wuding area, SW China. The dykes are composed of fine-grained diabases, which are further subdivided into two groups (Group I and Group II). The rocks from Group I have relatively higher MgO (4.95–6.16 wt%) and lower TiO 2 null (2.26–2.78 wt%) contents than those from the Group II rocks (MgO = 4.04–4.58 wt%; TiO 2  = 4.09–4.55 wt%). Two baddeleyite ages of 264 ± 3 Ma and 256 ± 5 Ma...