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The Baima mafic–ultramafic layered intrusion of the 260-Ma Emeishan Large Igneous Province (ELIP) hosts the second largest Fe–Ti–(V) oxide deposit in the Panxi region, SW China. It is a ~1600-m-thick layered body intruded by slightly younger syenitic and granitic plutons. The intrusion includes the Lower and Upper Zones. Troctolite and olivine pyroxenite of the Lower Zone contains conformable oxide...
Triassic Paleo-Tethyan subduction-related volcanic rocks are extensively distributed in the Xiangcheng and Changtai regions, northern Yidun Terrane, eastern Tibet. The ~228Ma volcanic rocks in the Xiangcheng region have intermediate-felsic composition (60.1 to 64.7wt.% SiO 2 ) with relatively low Y (14–18ppm) and high Sr (630–1830ppm) yielding high Sr/Y ratios (43–94). They have LREE-enriched...
The Kalatongke complex, located in south Chinese Altay of the Central Asian Orogenic Belt (CAOB), consists of the ~308Ma dioritic suite intruded by the 287Ma noritic suite. The noritic suite is composed of olivine norite and hornblende norite and hosts sulfide mineralization. The dioritic suite is composed of ferrodiorite, diorite and quartz diorite.Ferrodiorites have 43.6 to 51.8wt.% SiO 2 ...
Numerous Permian orthopyroxene-rich mafic–ultramafic intrusions in the southern margin of the Central Asian Orogenic Belt (CAOB) have been emplaced in a post-orogenic environment. The Huangshandong mafic–ultramafic intrusion is the largest in the eastern Tianshan Orogenic Belt of the CAOB and consists of a layered unit intruded by a massive unit. The layered unit consists of lherzolite, troctolite,...
Permian basalts are widely distributed in the Tarim Basin and surrounding areas of NW China. The magmatism is represented by basaltic flows in Keping and mafic and ultramafic dykes in Silurian–Devonian strata in Bachu, southwestern Tarim Basin. The basalts in Keping have SiO 2 (44.1%–55.5 wt.%) and total alkalis (Na 2 O+K 2 O=3.20–7.79 wt.%) similar to the mafic dykes in Bachu,...
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