We define lunar cryptovolcanism as volcanic deposits on the Moon hidden by overlying material. Notably, cryptovolcanism includes both cryptomaria (subsurface extrusive basaltic deposits that are obscured by overlying higher albedo basin and crater ejecta) and earlier candidate extrusives, such as the Mg-suite. Knowledge of the volume and extent of cryptovolcanism is necessary for a comprehensiv...

The Orientale basin is the youngest and best-preserved multiring impact basin on the Moon, having experienced only modest modification by subsequent impacts and volcanism. Orientale is often treated as the type example of a multiring basin, with three prominent rings outside of the inner depression: the Inner Rook Montes, the Outer Rook Montes, and the Cordillera. Here we use gravity data from ...

Early extrusive volcanism from mantle melting marks the transition from primary to secondary crust formation. Detection of secondary crust is often obscured by the high impact flux early in solar system history. To recognize the relationship between heavily cratered terrain and volcanic resurfacing, this study documents how volcanic resurfacing alters the impact cratering record and models the ...

Abstract Mosonik, a 3.25 Ma extensively dissected stratovolcano located in the North Tanzanian Divergence of East African Rift, consists predominantly phonolite and three types phonolitic nephelinite distinguished by presence or absence amphibole garnet antecrysts differing populations complexly zoned antecrystal phenocrystal pyroxenes. The antecryst–phenocryst assemblage is typical hybrid lava...

The combination of UPb zircon ages with Hf-Sr-Pb isotopes different intrusive and extrusive felsic sedimentary rocks provides constraints on the petrogenetic evolution continental crust in western Dharwar Craton, India. oldest detrital preserved formed at ?3.6 Ga represents a relic crustal material region. dominant granitoid units Craton contain grains magmatic between 3.4 3.0 that indicate for...

The extrusive component of the Karoo Large Igneous Province, Drakensberg Continental Flood basalts South Africa and Lesotho, is mainly composed altered tholeiitic without uraniferous mineral phases that are suitable for high-precision dating (e.g. baddeleyite or zircon), thus restricted to 40Ar/39Ar groundmass plagioclase. Previous dates plagioclase span from 178.9 ± 4.2 Ma 189.2 3.3 Ma, while ...

The composition of the intrusive gabbroic lower oceanic crust remains poorly characterized in comparison to extrusive portion crust, especially for intermediate-fast spreading mid-ocean ridges. This is a consequence limited exposures extant or ophiolites similar ridge crust. One best analogues southern Samail ophiolite that formed during period rapid seafloor above nascent subduction zone. Here...

In the Central IranianVolcanic Belt (CIVB), north-west of Shahre-Babak, in the area of Javazm, Dehaj and khabr, about 60 subvolcanic porphyritic dacitic to rhyodacitic domes (1-10 km2) are intruded into a variety of rock sequences from Mesozoic to Early Miocene in age. These rocks are a part of Dehaj-Sardoieh belt. The CIVB contains intrusive and extrusive rocks of Cretaceous-Quaternary age. Ge...