Results 141 to 150 of about 232 (180)
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Geological Society of America Bulletin, 1931
Conventional Sections and Maps In cross-sections showing granite batholiths, 2 it is customary to depict them as extending down as far as the section goes, bounded by rather steep sides and with no known bottom, which is in accord with the definition of a batholith, but the question may be asked; how far is this due to those limitations of drawing ...
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Conventional Sections and Maps In cross-sections showing granite batholiths, 2 it is customary to depict them as extending down as far as the section goes, bounded by rather steep sides and with no known bottom, which is in accord with the definition of a batholith, but the question may be asked; how far is this due to those limitations of drawing ...
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Tectonophysics, 1973
Abstract The formation of the melts which produce intrusions of the granite family are considered to result from the partial fusion of high-grade metamorphic rocks. The melting behaviour of such materials is considered. Such melts will rarely be water-saturated and the degree of water-saturation must set limits on the ability of the melt to rise. The
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Abstract The formation of the melts which produce intrusions of the granite family are considered to result from the partial fusion of high-grade metamorphic rocks. The melting behaviour of such materials is considered. Such melts will rarely be water-saturated and the degree of water-saturation must set limits on the ability of the melt to rise. The
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Batholiths of Southern Rhodesia
Geological Magazine, 1932THE problem of the formation of the larger masses of granite is receiving considerable attention by geologists at the present time, and it is hoped that the following observations and surmises regarding the granites of Southern Rhodesia may be of more than local interest. Southern Rhodesia forms part of a typical Pre-Cambrian shield and consists, apart
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On the Antarctic Peninsula batholith
Geological Magazine, 1995AbstractThe plutonic rocks of the Antarctic Peninsula magmatic arc form one of the major batholiths of the circum-Pacific rim. The Antarctic Peninsula batholith is a 1350 km long by < 210 km wide structure which was emplaced over the period ˜240 to 10 Ma, with a Cretaceous peak of activity that started at 142 Ma and waned during the Late Cretaceous.
Leat, P. T. +2 more
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Age of the Khangai batholith and challenge of polychronic batholith formation in Central Asia
Doklady Earth Sciences, 2013The Central Asian fold belt (CAFB) exhibits many manifestations of granitoid magmatism. The granite formation is largely determined by the convergence of the Siberian continent with structures of the Paleo Asian ocean, which was practically continuous from the Late Riphean until the Early Mesozoic.
V. V. Yarmolyuk +6 more
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Batholith-associated mineralization
1983Batholiths are characteristic features of cordilleran volcano—plutonic arcs at destructive plate junctures or collision belts paralleling orogenic suture zones. Important mineralization is associated with the granitoid phases of the batholiths, which vary considerably in character and composition with tectonic setting.
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Endomorphism of the Idaho batholith
Geological Society of America Bulletin, 1942Study of many parts of the Idaho batholith shows considerable endomorphism by post-consolidation solutions. The solutions, enriched particularly in silica but also in variable but generally appreciable quantities of potash and minor amounts of other elements, produced many changes in the solid rock.
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The Vermilion Batholith of Minnesota
The Journal of Geology, 1925This paper is a summary of the petrography and petrology of the largest granite batholith in Minnesota. The granite is of Algomian age and reached its position partly by crowding out its walls and largely by stoping upward into mica schists. Its main phase is a fresh biotite granite of no great peculiarity. Its minor phases, modified by metamorphism or
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Journal of the Geological Society, 1978
The Mesozoic-Cenozoic Coastal Batholith of Peru is a multiple intrusion of gabbro, tonalite and granite occupying the core of the Western Cordillera over a length of 1600 km. Its structure and composition are described within the context of an intracratonic Andean zone in which vertical movements were dominant.
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The Mesozoic-Cenozoic Coastal Batholith of Peru is a multiple intrusion of gabbro, tonalite and granite occupying the core of the Western Cordillera over a length of 1600 km. Its structure and composition are described within the context of an intracratonic Andean zone in which vertical movements were dominant.
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The Problem of Batholithic Intrusion
Geological Magazine, 1923Speculation as to the causes of the great intrusions known as batholiths is coeval with petrology as a science. Daly says that batholiths are “the least understood of all the intrusive bodies. If they were truly understood there would be no ‘problem’ of the igneous rocks”.1 This, no doubt, puts the matter too strongly, but there is nevertheless much ...
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