The Ventersdorp Contact Reef (VCR) at the base of >4.5 km-thick volcanosedimentary Supergroup unconformably overlies Witwatersrand and is second youngest mineable reef in Goldfields. volcanic rocks are predominantly mafic, affected by low-grade thermal metamorphism difficult to date. Only Makwassie Formation upper Platberg Group main repository has been reliably dated on four felsic samples 272...

The island of Syros consists largely of possibly-repeated sequences of glaucophane-bearing calcareous schists, mafic schists, dolomite marbles, and calcite marbles containing abundant aragonite pseudomorphs (Dixon, 1969; Hecht, 1984). Several discrete, fault-bounded packages of blueschist/eclogite-facies mafic rocks with minor serpentinite are also found on the island. Although the mafic rocks ...

Igneous sheet intrusions are a fundamental component of volcano plumbing systems. Identifying how intrusion emplacement and geometry controls later magmatic processes is critical to understanding the distribution volcanic eruptions magma-related ore deposits. Using Younger Giant Dyke Complex (YGDC), Mesoproterozoic suite large (<800 m wide) mafic dykes in southern Greenland, we assess influence...