Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"kyanite"”.
-
Dry pressed lightweight refractories from Virginia kyanite
The utilization of the expansion accompanying kyanite’s inversion in the production of a dry pressed refractory insulating material has been studied quantitatively with respect to: (1) clay-kyanite-combustible ratio; (2) addition of fluxing and mineralizing materials; (3) variation in forming …
-
Geology and Geochemistry of the Trail Creek Kyanite Deposit, Albany County, Wyoming
Made available in DSpace on 2014-12-09T20:34:24Z (GMT). No. of bitstreams: 1 6612429.pdf: 3916678 bytes, checksum: 42fc71c1cc3b12570cad9534c6dbc5c9 (MD5) Previous issue date: 1966
-
Petrogenesis of the Willis Mountain and East Ridge kyanite quartzite, Buckingham County, Virginia
The kyanite quartzites of the Willis Mountain and East Ridge deposits in Buckingham County, Virginia hosts the world's largest kyanite mine and constitute the largest known reserves of kyanite. The stratiform kyanite quartzite is overlain and underlain by quartz-muscovite schists which are in turn …
-
Petrogenesis and geochemistry of kyanite-bearing pegmatites in the Buncombe Pegmatite District, North Carolina
Kyanite is generally considered to be a product of metamorphism. This study investigates a set of kyanite-bearing pegmatites that represent a case in which kyanite crystallized directly from melt. The pegmatites intrude spinel orthopyroxene hornblendite in the Buncombe Pegmatite District in the …
-
The development of a plastic refractory
… of producing a plastic refractory using calcined kyanite, raw kyanite a refractory clay of high plasticity and sodium silicate as an air setting ingredient. Using 35 mesh calcined kyanite, 35 mesh raw kyanite, 100 mesh raw kyanite, 20 mesh A-l Sagger Mix refractory clay and sodium silicate, a …
-
Quartz-kyanite pods in Proterozoic rocks in northern New Mexico : shear zone formation along an older hydrothermal alteration horizon
Large quartz-kyanite schist pods of unusual bulk composition enclosed by shells of sericite schist occur within the 1.7 Ga Vadito Group metarhyolite in northern New Mexico. These pods are discontinuous, lenticular, symmetrically zoned, and are stratiform within a map-scale sericitic horizon. …
-
Magmatism, Deformation And Mesothermal Metasomatism: Interpretation Of Aluminosilicate Mineral Assemblages In The Cargo Muchacho Mountains, Southeastern California
… and (c) the Kyanite Zone, with quartz-kyanite-muscovite-magnetite-rutile-tourmaline-apatite (with or without andalusite, pyrophyllite, staurolite, lazulite, and specularite) occur in the Kyanite Zone.;The host rocks are find grained quartzofeldspathic gneiss of …
-
The geochemistry and origin of xenoliths from the Roberts Victor Mine
… eclogites, inhomogeneous kyanite eclogites and chrome-rich eclogites were examined in detail. (i) Megacryst-bearing eclogites originated by crystallisation of clinopyroxene megacrysts within volatile-rich portions of an eclogite magma and the subsequent entrapment of the …
-
The metamorphic evolution of an ancient accretionary prism in the southern zone of the Damara Belt in Namibia
… zoned garnet, staurolite and in some cases, kyanite porphyroblasts set in a fine-grained matrix of chlorite, biotite, muscovite, paragonite, epidote, ilmenite and quartz. The matrix exhibits a penetrative foliation that is defined by the alignment of the micaceous minerals. The garnet, …
-
Geology of the Ashe Formation between Fries and Galax, Virginia
… growth of biotite, garnet, staurolite, and kyanite followed penetrative foliation development, with metamorphic grade increasing stratigraphically upward to form inverted isograds. Thrust faulting along the Fries Fault caused extensive mylonitization of the Cranberry Gneiss and offset of the …
-
The tectonic relationships of the Hillabee Chlorite Schist and the adjacent rock units in southern Cleburne County, Alabama
… facies rocks. Mica Schist with garnet and kyanite are interbedded with Amphibolites composing this block. Deformation along the Hollins line Fault creates a sercite phyllite in the high grade metamorphic Coosa Block unit. These phyllites include garnet that defines the contact between the …
-
ΠΕΤΡΟΓΕΝΕΣΙΣ ΤΩΝ ΜΕΤΑΜΟΡΦΩΜΕΝΩΝ ΠΕΤΡΩΜΑΤΩΝ ΤΗΣ ΝΗΣΟΥ ΛΕΡΟΥ
… INTO CHLORITE, BIOTITES, GARNET AND STAURDITE- KYANITE ZONES OF PROGRESSIVE REGIONAL METAMORPHISM. ATTEMPTS HAVE BEEN MADE TO ESTIMATE THE PHYSICAL CONDITIONS OF METAMORPHISM COMBINING THE MINERAL ASSEMBLAGES WITH AVAILABLE EXPERIMENTAL OR CALCULATED PHASE EQUILIBRIA. THE DEVELOPMENT OF THE …
-
Regolith and associated mineral systems of the Eucla Basin, South Australia.
… for other methods. This thesis also found that kyanite and staurolite, which are common minerals in the Eucla Basin HMS, do not have an identified source in the Musgrave Province but do have a potential source in the Mount Barren Group in the Albany-Fraser Province. Finally, this thesis clearly …
-
The geology and geochemistry of the Lumwana Basement hosted copper-cobalt (uranium) deposits, NW Zambia
… to Cu±Co mineralized quartz-phlogopite-muscovite-kyanite-sulphide Ore Schist. The transitional contacts and structural controls on mineralization has led to the hypothesis that these deposits represent metasomatically altered, mineralized and sheared basement, rather than mineralized …
-
Cratonic eclogite xenoliths - formation and evolution of the subcontinental lithospheric mantle
… (garnet (gt)-omphacite (cpx)), coesite-, kyaniteand corundum-bearing eclogites. Metasomatized eclogites (Type I) have a higher alkali- (Na2O in garnet and K2O in omphacite) and LREE, LILE-content. Non-metasomatized (Type II) eclogites include two main compositional groups, derived from …
-
Eo-Variscan Orogenesis in the Guilleries Massif, Catalan Coastal Ranges, Northeastern Spain Recorded by U-Th-Pb ages of Monazite Inclusions in Metamorphic Garnet
… is related to the intrusion of granite. Relict kyanite preserved in the matrix of rocks with S1 inclusion trails provides evidence for a phase of nonmagmatic thrusting and higher pressure metamorphism prior to the peak metamorphic event.</p>
-
A study of the crystal chemistry, electron density distributions, and hydrogen incorporation in the Al₂SiO₅ polymorphs
… and 6-fold in sillimanite, andalusite, and kyanite, respectively. Consequently, the Al₂SiO₅ polymorphs have been examined with a combination of experimental (high pressure X-ray diffraction and Polarized FTIR spectroscopy) and theoretical (VASP and Crystal 98) methods. An experimental high …
-
P-T-t-d evolution paths within the Gander Zone, NE Newfoundland
… high strain zone characterised by andalusite ~ kyanite ~ sillimanite indicative of a clockwise metamorphic path (peak conditions c. 650°C, 5.5 kbar). In domain 3, deformed metasediments (D2-D3EAsT) display an eastward increase in structural complexity and metamorphic grade to a peak of c. 600°C. …
Page 1 of 2