The Verkhisetsk batholith is located between the Serov-Mauk and Ekaterinburg shear zones. From a tectono-magmatic perspective, the batholith is located in the active continental margin zone of the NW continental sector of the Uralian Magmatic Domain. It is one of the largest batholiths in the Urals and is ~100 km long by ~25 km wide and intrudes metavolcanic rocks.
Granite batholiths in the central Urals along with large scaled
shear zones. [Ref.: Bea et al., 1997].
Legend: Striped=Verkhisetsk batholith, Dots=continental-type batholiths, Black=subduction-related batholiths

The batholith is composed of older, coarse grained, strongly deformed TTG suite outer envelope¾intruded by a core of younger, fine grained, undeformed granodiorites, adamellites, and granites with abundant dyke swarms of leucogranites, aplites, and pegamtites. Radiometric dating  of samples from the older and younger rocks utilizing Rb-Sr isotopes has been conducted.  The  older rocks of the batholith  show isochron ages of 316 +/- 6 Ma and 320 +/- 12 Ma.  The older rocks also have a high-Al TTD (tonalite-trondhjemite-dacite)/adakite chemistry, eNd(320Ma/chur) = 2-5,  and 87Sr/86Sr=0.7043  isotopic ratios. The magma source for the older rocks is believed to come from the melting of metabasalts in a subducted slab of oceanic lithosphere.

Two Rb-Sr isochrons for the younger rocks of the batholith indicate an crystallization age of 276+/- 5 Ma and 284 +/- 16 Ma. The younger rocks were  generated by the remelting of older rocks during an melting event (275-290 Ma) that supposedly occurred throughout the Urals as a result of mafic underplating of the crust.  This same event is said to have produced the huge continental-type batholiths observed in the eastern continental sectors of the Uralian Domain.

Geology of the Verkhisetsk batholith [Ref : Bea et al., 1997]


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