Base and precious metal mineralization is hosted by felsic volcanic rocks, which are in turn crosscut by hypabyssal
intrusions, associated with a local paleovolcanic centre.
Ordovician volcanic and hypabyssal
rocks in the central and southern Miramichi Highlands: their tectonic setting and relationship to contemporary volcanic rocks in northern New Brunswick.
At La Pedriza, hypabyssal
rocks, most prominently microdiorite/aplites and granitic porphyry constitute dikes running inside the granitic rock matrix in an E-W direction.
Geophysical results infer the Groundhog Project lies along the Northeast margin of the large Cretaceous granodiorite Kaskanak batholith and is intersected by a north-northeast-trending corridor of distinctive co-magmatic hypabyssal
The lithology of the area consists of greenschists, mica schists, quartzites, hornblende schists, amphibolites, garnet-amphibolites, serpentinites and porphyritic hypabyssal
rocks with andesitic to dacitic composition (Figure 1).
Following Dickinson (2006), the term "microphanerite" here covers plutonic and hypabyssal
These rocks have textures and compositions similar to those of their volcanic equivalents and might be the hypabyssal
parts of the komanitic volcanic suites (Arndt et al.
The basement of the graben and the fabric of the hills that surround it consist essentially of plutonic and hypabyssal
1987) Petrology of the alkalic hypabyssal
and volcanic rocks at Cripple Creek, Colorado.
Francois Mountains Complex regardless of inferred mode or depth of crystallization (volcanic phenocryst versus volcanic matrix versus hypabyssal
ring pluton versus subvolcanic massif) or crystallization age (1.
Approximately 30 kimberlite occurrences have been identified in the district, including the larger, upper-level diatreme facies such as at Sloan and Kelsey Lake, lower-level diatreme to root zone intrusions, such as at Nix and Moen; and hypabyssal
dikes such as George Creek.