KSIĄŻKI POWIĄZANE ZE SŁOWEM «MICROPEGMATITIC»
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1
Geology of the Castle mountain mining district, Montana
GBANITE-PORPHYRY WITH MICROPEGMATITIC GROUNDMASS. This form is
most common in the northern and western portions of the mass. All gradations
between it and the granite may be found. The tendency noticed in the granite for
...
Walter Harvey Weed, Louis Valentine Pirsson, 1896
2
Economic Geology of the Georgetown Quadrangle (together with ...
MICROPEGMATITIC AND RELATED TEXTURES. The term micropegmatite is
applied to an intimate intergrowth of two minerals, such as orthoclase and quartz,
which is visible only under the microscope. As a rule one of the minerals sends ...
Josiah Edward Spurr, George H. Garrey, Sydney Hobart Ball, 1908
interpretations of the adamellite : (a) It may represent a separate intrusion which
has inserted itself along the contact between the micropegmatitic granodiorite
and the gabbro. (b) It may have been developed, by a process of metasomatism ...
4
Geology and Ore Deposits of the Philipsburg Quadrangle, Montana
«s micropegmatitic intergrowth of oligoclase and quartz oriented on large crystal
of labradorr Black is chiefly hornblende, intergrown with quartz. Slender needles
of apatite conspicuo near top. Crossed nicols. Enlarged 60 diameters. B. THIN ...
William Harvey Emmons, Frank Cathcart Calkins, 1913
5
Igneous Rocks and Their Origin
Probablygravitative. Gravitative. . . TABLE XIVrHSILLS AND LACCOLITHS
ILLUSTRATING PETROGENESIS 0'. b. c. d. Rock-species differentiated .
Micropegmatitic granite and granudiorite, quartz diorite. Abnormal intermediate
types Norite.
injection, there are several possibilities — (i) microgranite earlier, (ii) mic-
rogranite later, (iii) microgranite and micropegmatitic dolerite emplaced
simultaneously. In the Keonjhar composite dyke, the microgranite is decidedly
younger than the ...
injection, there are several possibilities — (i) microgranite earlier, (ii) mic-
rogranite later, (iii) microgranite and micropegmatitic dolerite emplaced
simultaneously. In the Keonjhar composite dyke, the microgranite is decidedly
younger than Ihe ...
Indian Academy of Geoscience, 1973
8
Proceedings of the Indian Science Congress
Petrology of a composite Dyke of Microgranite-Micropegmatitic Dolerite in the
Northern part of Keonjhar Dt., Orissa P. K. Guha, Patna and P. K. Chatterjee,
Calcutta. Micropegmatitic dolerite constitutes the marginal part of the ten mile
long, ...
9
Geological Survey Professional Paper
Locally some of the quartz is in micropegmatitic intergrowths with the feldspar.
Microcline individuals are not nu- Figuhk 8.-— Pikes PeaM'.') granite; note
coarsely crystalline texture and conspicuous ilurk minerals; length of specimen, 3
inches.
10
U.S. Geological Survey Professional Paper
In the less coarsely crystalline rocks of small dikes and near the walls of the
larger dikes the groundmass is often a minutely and rather obscurely crystalline
aggregate of quartz and orthoclase in little micropegmatitic granules less than 0.1
...
