... plate reorganization. New U-Pb geochronology from the Lassiter Coast intrusive suite in the southern Antarctic Peninsula identifies a major magmatic event in the interval 130–102 Ma that was characterized by three distinct peaks in granitoid emplacement at 130–126 Ma, 118–113 Ma, and 108–102 Ma...

... Ma, >13000 km 2 Cretaceous Lassiter Coast Intrusive Suite, during the accretionary mid-Cretaceous Palmer Land Event orogeny. A previously undated >100 m thick dyke-like quartz tonalite intrusion was emplaced at 116.5 ± 1.5 Ma (Ar–Ar biotite cooling age) along a NW–SE axis, coeval with NW–SE...

...WALTER R. VENNUM; PETER D. ROWLEY Abstract Calc-alkaline plutonic rocks of the Lower Cretaceous Lassiter Coast Intrusive Suite are the predominant rocks exposed in the Lassiter, Orville, and southern Black Coasts and eastern Ellsworth Land of West Antarctica. Compositions range from granite...

... and Lassiter Coast Intrusive Suite from Vennum & Rowley (1986) , Hathway (2000) and Flowerdew et al . (2005) . ...

... ) and in SE Palmer Land, where the Lassiter Coast Intrusive Suite is exposed ( Fig. 2a ; Rowley et al. 1983 ; Riley et al. 2018 ; Burton-Johnson et al. in press ). These rocks are mainly tonalite, quartz diorite and granodiorite and crop out over an area of c . 80 000 km 2 ( Fig. 2a ; Burton...

... of the Lassiter Coast Intrusive Suite ( Vennum & Rowley 1986 ). These range from small (metre- to sub-kilometre scale) stocks and dykes to the 100 km-scale Werner batholith ( Vennum & Rowley 1986 ), with ages ranging from c. 127 to c. 88 Ma determined by the K–Ar method on biotite and hornblende...

... al., 2023 ). A second suite of ages at ca. 125 Ma has a narrower range in εHf (−4 to −2) and overlaps with the field of granitoids associated with the Lassiter Coast intrusive suite of eastern Palmer Land ( Fig. 1 ; Riley et al., 2018 ). The Ablation Point Formation is restricted to eastern...