Kerr & Pollard23 introduce a laccolith
model in which they treat the overburden of the pressurised magma as an elastic plate.
The long dikes were required to account for the rille's two arms, and the laccolith
was necessary to provide a void for the collapse that formed Hyginus.
Mineralization is zoned concentrically about the San Pedro Peak laccolith
2000, Tertiary phonolite laccolith
of Marianska hora Hill, N Bohemia: Geological, petrological and mineralogical characteristics, Acta Montana, ser.
Located near the southern end of the Rio Narcea gold belt 16 km south of the town of Salas, El Valle consists of five major zones of gold mineralisation within an 800 m radius that form a single, northeast-oriented mineralised system around the Boinas laccolith
The rhyolite body is a mushroom-shaped laccolith
, slightly elongated northwest-southeast and dipping gently to the southwest.
2003), in the Median Subbetic (Betic Cordillera), recorded and analysed saponite at the contact of marl-limestone rhythmites with a laccolith
of dolerites as a consequence of hydrothermal alteration facilitated by an intense fracturation and the circulation of lower-temperature fluids; in the slightly altered rocks Ca-zeolites were also found (Jimenez-Millan et al.
The bedrock of the profile U-II is a marginal analcime-phyric facies of the phonolite laccolith
that grades into amygdaloidal natrolite-sodalite phonolite in the laccolith
The magmatic sequence led to the formation of a nested Christmas-tree laccolith
complex with a total thickness of about 2400 m of porphyritic rocks emplaced at depths of 2--3.
A locally sulfidic laccolith
intrusive of quartz-eye porphyry of the Caetano Tuff underlies the skarns, and this may have been the source of the IP anomaly.
1996): Petrology and mineral resources of the Wind mountain laccolith
, Cornudas mountains, New Mexico and Texas.
This dome is not a laccolith
, but rather a large breccia "hill" overlain by an 11,000 to 15,000-foot-thick sequence of sedimentary rocks.