1-20 OF 3557 RESULTS FOR

Fluorite crystal

Results shown limited to content with bounding coordinates.
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article

The temperature of crystallization of a fluorite crystal from Luna County, New Mexico Available to Purchase

William Stephens Twenhofel
Journal: Economic Geology
Published: 01 January 1947
Economic Geology (1947) 42 (1): 78–82.
DOI: https://doi.org/10.2113/gsecongeo.42.1.78
...William Stephens Twenhofel Abstract Temperature determinations made by heating liquid inclusions in a fluorite crystal from the Greenleaf no. 1 prospect, Fluorite Ridge, Luna County, New Mexico, indicate that the crystal started its growth at about 202 degrees C. and continued growth until...
View PDF for article title, The temperature of <span class="search-highlight">crystallization</span> of a <span class="search-highlight">fluorite</span> <span class="search-highlight">crystal</span> from Luna County, New Mexico
Purchase
Add to Citation Manager for The temperature of <span class="search-highlight">crystallization</span> of a <span class="search-highlight">fluorite</span> <span class="search-highlight">crystal</span> from Luna County, New Mexico
Journal Article

Crystal growth and dissolution kinetics of gypsum and fluorite; an in situ scanning force microscope study Available to Purchase

Dirk Bosbach, Guntram Jordan, Werner Rammensee
Published: 01 April 1995
European Journal of Mineralogy (1995) 7 (2): 267–276.
View PDF for article title, <span class="search-highlight">Crystal</span> growth and dissolution kinetics of gypsum and <span class="search-highlight">fluorite</span>; an in situ scanning force microscope study
Purchase
Add to Citation Manager for <span class="search-highlight">Crystal</span> growth and dissolution kinetics of gypsum and <span class="search-highlight">fluorite</span>; an in situ scanning force microscope study
Journal Article

Fluorite in Crystal-Lined Vugs in the Maquoketa Shale at Volga, Clayton County, Iowa Available to Purchase

C. Ervin Brown
Published: 01 December 1967
American Mineralogist (1967) 52 (11-12): 1735–1750.
...C. Ervin Brown Abstract Near Volga, Iowa, vugs lined with small but well-formed crystals of calcite, color-zoned fluorite, sphalerite, and pyrite are in the lowermost phosphatic sediments of the Maquo-keta Shale. The association of calcite, pyrite, and sphalerite and their paragenesis, crystal...
View PDF for article title, <span class="search-highlight">Fluorite</span> in <span class="search-highlight">Crystal</span>-Lined Vugs in the Maquoketa Shale at Volga, Clayton County, Iowa
Purchase
Add to Citation Manager for <span class="search-highlight">Fluorite</span> in <span class="search-highlight">Crystal</span>-Lined Vugs in the Maquoketa Shale at Volga, Clayton County, Iowa
Image
(a) Fluorite crystal structure. (b) Cotunnite-type crystal structure. Green spheres represent the Th4+ cations, red spheres represent the O2– anions. (Color online.)

( a ) Fluorite crystal structure. ( b ) Cotunnite-type crystal structure. G... Available to Purchase

Published: 01 May 2018
Figure 1. ( a ) Fluorite crystal structure. ( b ) Cotunnite-type crystal structure. Green spheres represent the Th 4+ cations, red spheres represent the O 2– anions. (Color online.)
Image
Formation of cavities by laser ablation inside a fluorite crystal. a) Low magnification showing the microcracks around the ablation cavities inside a fluorite crystal. b and c) Microcracks connected with the surface of the crystal. d) Ablation cavity inside a fluorite crystal produced with a single laser shot of high energy; a microcrack connected to the cavity is visible. e) Interpretation schema showing the ablation cavity and the microcracks.

Formation of cavities by laser ablation inside a fluorite crystal. a) Low m... Available to Purchase

Published: 01 November 2000
Fig. 3. Formation of cavities by laser ablation inside a fluorite crystal. a) Low magnification showing the microcracks around the ablation cavities inside a fluorite crystal. b and c) Microcracks connected with the surface of the crystal. d) Ablation cavity inside a fluorite crystal produced
Image
Photomicrographs: a) Ablation cavity in a fluorite crystal not sealed after experiment (200°C, 4 weeks). Elongated inclusions are formed by healing of the microcracks. b) and c) Microphotographs of the same synthetic fluid inclusion in fluorite produced from an ablation cavity showing an elongation along the laser beam axis (oil immersion objective x100); b): top of the cavity with the visible vapour bubble; c): bottom of the cavity under the vapour phase. d) Pyramidal quartz overgrowths parallel to c axis perpendicular to prismatic face (300°C, 5 weeks). e) Healed microcracks in quartz with numerous flat inclusions. f) Inclusion in quartz made from an ablation cavity.

Photomicrographs: a) Ablation cavity in a fluorite crystal not sealed after... Available to Purchase

Published: 01 November 2000
Fig. 4. Photomicrographs: a) Ablation cavity in a fluorite crystal not sealed after experiment (200°C, 4 weeks). Elongated inclusions are formed by healing of the microcracks. b) and c) Microphotographs of the same synthetic fluid inclusion in fluorite produced from an ablation cavity showing
Image
—Fluorite crystal showing inclusions of hydrocarbons. Magnification 2X.

—Fluorite crystal showing inclusions of hydrocarbons. Magnification 2X. Available to Purchase

Published: 01 May 1937
FIG. 1. —Fluorite crystal showing inclusions of hydrocarbons. Magnification 2X.
Image

REE AND Y DATA ON YELLOW FLUORITE CRYSTALS FROM HYDROTHERMAL BARITE-FLUORIT... Available to Purchase

Published: 01 June 2005
TABLE 2. REE AND Y DATA ON YELLOW FLUORITE CRYSTALS FROM HYDROTHERMAL BARITE-FLUORITE VEINS FROM THE ERZGEBIRGE EASTERN GERMANY
Image
(a) Optical cathodoluminescence (OCL) images of fluorite crystals showing multiple dissolution, precipitation and brecciation events that are not visible using traditional optical microscopy. Samples from Sedling mine [NY8592241110] (ESE–WNW Quarter Point vein). (b) OCL images of calcite crystals showing zonal growth and brecciation, but lacking the obvious dissolution–precipitation textures seen in fluorite. Samples from Nenthead [NY7864442992] (ESE–WNW Quarter Point vein)..

( a ) Optical cathodoluminescence (OCL) images of fluorite crystals showing... Open Access

Published: 11 March 2021
Fig. 10. ( a ) Optical cathodoluminescence (OCL) images of fluorite crystals showing multiple dissolution, precipitation and brecciation events that are not visible using traditional optical microscopy. Samples from Sedling mine [NY8592241110] (ESE–WNW Quarter Point vein). ( b ) OCL images
Image

SAMPLE LOCATIONS AND DESCRIPTIONS OF YELLOW FLUORITE CRYSTALS COLLECTED IN ... Available to Purchase

Published: 01 June 2005
TABLE 1. SAMPLE LOCATIONS AND DESCRIPTIONS OF YELLOW FLUORITE CRYSTALS COLLECTED IN THE ERZGEBIRGE EASTERN GERMANY
Book Chapter

The Okorusu, Namibia Carbonatite-Related Fluorite Deposits, and a Comparison with the Illinois-Kentucky Fluorite District/Hicks Dome Available to Purchase

Author(s)
Ari I. Kogut, Richard D. Hagni, Gabriele I.C. Schneider
Book: Carbonate-Hosted Lead-Zinc Deposits: 75 th Anniversary Volume
Series: Special Publications of the Society of Economic Geologists
Publisher: Society of Economic Geologists
Published: 01 January 1996
DOI: 10.5382/SP.04.20
EISBN: 9781629490281
... Fluorspar District. The Okorusu ores consist of massive replacement fluorite and large fluorite crystals deposited in vugs. Purple and green replacement fluorite contains abundant finely crystallized inclusions of quartz, apatite, goethite, and calcite, together with minor strontianite, barite, rutile...
Abstract
View PDF for content titled, The Okorusu, Namibia Carbonatite-Related <span class="search-highlight">Fluorite</span> Deposits, and a Comparison with the Illinois-Kentucky <span class="search-highlight">Fluorite</span> District&#x2F;Hicks Dome
Purchase
Add to Citation Manager for The Okorusu, Namibia Carbonatite-Related <span class="search-highlight">Fluorite</span> Deposits, and a Comparison with the Illinois-Kentucky <span class="search-highlight">Fluorite</span> District&#x2F;Hicks Dome

Abstract The Okorusu deposit, located in north-central Namibia about 200 km north of Windhoek, is the largest fluorite deposit in Namibia. Its annual production of 40,000 tons fluorspar concentrate per year rivals recent annual concentrate production from the Southern Illinois-Kentucky Fluorspar District. The Okorusu ores consist of massive replacement fluorite and large fluorite crystals deposited in vugs. Purple and green replacement fluorite contains abundant finely crystallized inclusions of quartz, apatite, goethite, and calcite, together with minor strontianite, barite, rutile, pyrite, galena, and synchysite. The fluorite deposits at Okorusu are spatially related to an alkaline igneous-carbonatite ring dike complex. The presence of apatite, synchysite, and elevated rare earth element (REE) concentrations in the Okorusu fluorite ores indicate that those ores are also genetically related to that alkaline complex. Poorly studied deep fluorite ores in the Hicks Dome area of the Southern Illinois-Kentucky Fluorite District share some similarities with the Okorusu fluorite ores.

Image
Chondrite-normalized REE patterns of the yellow fluorite crystals. Normalization was performed using the chondrite data given by Anders &amp; Grevesse (1989). Note that all samples are typified by patterns that are enriched in the MREE.

Chondrite-normalized REE patterns of the yellow fluorite crystals. Normaliz... Available to Purchase

Published: 01 June 2005
F ig . 3. Chondrite-normalized REE patterns of the yellow fluorite crystals. Normalization was performed using the chondrite data given by Anders & Grevesse (1989) . Note that all samples are typified by patterns that are enriched in the MREE.
Image
Fluorite occurrences at Olympic Dam and in the Gawler silicic large igneous province (SLIP). A: Intergrown fluorite and chalcocite (opaque) crystals. Sample RD3449, 431.4 m, scale bar 100 μm. B: Fluorite daughter crystals in a melt inclusion hosted by a quartz phenocryst in the Gawler SLIP rhyolite. Sample GC8, scale bar 50 μm. C: Fluorite crystal in a quartz phenocryst in Gawler SLIP rhyolite. Sample GC15, scale bar 20 μm. D: Interstitial fluorite crystal in the Hiltaba Suite granite. Sample HS1, scale bar 500 μm.

Fluorite occurrences at Olympic Dam and in the Gawler silicic large igneous... Available to Purchase

Published: 01 November 2011
Figure 2. Fluorite occurrences at Olympic Dam and in the Gawler silicic large igneous province (SLIP). A: Intergrown fluorite and chalcocite (opaque) crystals. Sample RD3449, 431.4 m, scale bar 100 μm. B: Fluorite daughter crystals in a melt inclusion hosted by a quartz phenocryst in the Gawler
Image
Backscattered electron (BSE) images showing occurrence and mineral associations of zinconigerite-2N1S and -6N6S from the Xianghualing skarn. (a) Euhedral zinconigerite-2N1S crystals among fluorite crystals; (b) Zinconigerite-2N1S crystal veinlets among fluorite; (c and d) euhedral zinconigerite-6N6S crystals among fluorite crystals. Abbreviations: 2N1S = zinconigerite-2N1S; 6N6S = zinconigerite-6N6S; Fl = fluorite; Mgt = margarite; Chb = chrysoberyl; Plg = phlogopite.

Backscattered electron (BSE) images showing occurrence and mineral associat... Available to Purchase

Published: 03 October 2022
Figure 2. Backscattered electron (BSE) images showing occurrence and mineral associations of zinconigerite-2 N 1 S and -6 N 6 S from the Xianghualing skarn. ( a ) Euhedral zinconigerite-2 N 1 S crystals among fluorite crystals; ( b ) Zinconigerite-2 N 1 S crystal veinlets among fluorite; ( c
Journal Article

CONSTRAINTS ON THE GENESIS OF YELLOW FLUORITE IN HYDROTHERMAL BARITE–FLUORITE VEINS OF THE ERZGEBIRGE, EASTERN GERMANY: EVIDENCE FROM OPTICAL ABSORPTION SPECTROSCOPY, RARE-EARTH-ELEMENT DATA, AND FLUID-INCLUSION INVESTIGATIONS Available to Purchase

Michael Trinkler, Thomas Monecke, Rainer Thomas
Published: 01 June 2005
The Canadian Mineralogist (2005) 43 (3): 883–898.
DOI: https://doi.org/10.2113/gscanmin.43.3.883
...TABLE 2. REE AND Y DATA ON YELLOW FLUORITE CRYSTALS FROM HYDROTHERMAL BARITE-FLUORITE VEINS FROM THE ERZGEBIRGE EASTERN GERMANY ...
FIGURES | View All (5)
View PDF for article title, CONSTRAINTS ON THE GENESIS OF YELLOW <span class="search-highlight">FLUORITE</span> IN HYDROTHERMAL BARITE–<span class="search-highlight">FLUORITE</span> VEINS OF THE ERZGEBIRGE, EASTERN GERMANY: EVIDENCE FROM OPTICAL ABSORPTION SPECTROSCOPY, RARE-EARTH-ELEMENT DATA, AND FLUID-INCLUSION INVESTIGATIONS
Purchase
Add to Citation Manager for CONSTRAINTS ON THE GENESIS OF YELLOW <span class="search-highlight">FLUORITE</span> IN HYDROTHERMAL BARITE–<span class="search-highlight">FLUORITE</span> VEINS OF THE ERZGEBIRGE, EASTERN GERMANY: EVIDENCE FROM OPTICAL ABSORPTION SPECTROSCOPY, RARE-EARTH-ELEMENT DATA, AND FLUID-INCLUSION INVESTIGATIONS
Journal Article

The chemical and thermal evolution of the fluids in the Cave-in-Rock fluorspar district, Illinois; mineralogy, paragenesis, and fluid inclusions Available to Purchase

Catherine K. Richardson, Darrell M. Pinckney
Journal: Economic Geology
Published: 01 December 1984
Economic Geology (1984) 79 (8): 1833–1856.
DOI: https://doi.org/10.2113/gsecongeo.79.8.1833
... available transparent minerals in the paragenetic sequence: fluorite, sphalerite, quartz, calcite, and barite. The bulk of the fluid inclusion data, however, was from fluorite crystals.The fluorite crystals from the bedded replacement deposits are color banded. The banding sequence is observable...
View PDF for article title, The chemical and thermal evolution of the fluids in the Cave-in-Rock fluorspar district, Illinois; mineralogy, paragenesis, and fluid inclusions
Purchase
Add to Citation Manager for The chemical and thermal evolution of the fluids in the Cave-in-Rock fluorspar district, Illinois; mineralogy, paragenesis, and fluid inclusions
Journal Article

Mineral chemistry and petrogenesis of a HFSE(+HREE) occurrence, peripheral to carbonatites of the Bear Lodge alkaline complex, Wyoming Available to Purchase

Allen K. Andersen, James G. Clark, Peter B. Larson, Owen K. Neill
Published: 01 July 2016
American Mineralogist (2016) 101 (7): 1604–1623.
DOI: https://doi.org/10.2138/am-2016-5532
... of fine-grained anatase as the sole Ti-oxide mineral, concentrically banded botryoidal fluorite textures, and presumed hydration of phosphate minerals. Fluid interaction with Ca-rich lithologies is known to initiate fluorite crystallization which may cause destabilization of (HREE,Ti,Nb)-fluoride...
FIGURES | View All (10)
View PDF for article title, Mineral chemistry and petrogenesis of a HFSE(+HREE) occurrence, peripheral to carbonatites of the Bear Lodge alkaline complex, Wyoming
Purchase
Add to Citation Manager for Mineral chemistry and petrogenesis of a HFSE(+HREE) occurrence, peripheral to carbonatites of the Bear Lodge alkaline complex, Wyoming
Journal Article

Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado Available to Purchase

C VANCE HAYNES, JR.
Journal: GSA Bulletin
Published: 01 April 1965
GSA Bulletin (1965) 76 (4): 441–462.
DOI: https://doi.org/10.1130/0016-7606(1965)76[441:GOTWCA]2.0.CO;2
... are generally: (1) wall zones of graphic granite; (2) outer-intermediate zones of biotite, cyrtolite, and perthite; (3) middle-intermediate zones of giant perthite crystals; and (4) inner-intermediate zones of euhedral fluorite crystals. Compromise surfaces between some minerals are interpreted as evidence...
View PDF for article title, Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado
Purchase
Add to Citation Manager for Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado
Image
Examples of fluid inclusion assemblages (FIAs) containing primary fluid inclusions. (a) Photomicrograph of a portion of a quartz crystal from the epithermal Ag deposits at Guanajuato, Mexico, showing three primary FIAs outlining former growth surfaces in the crystal. (b) Photomicrograph of a portion of a quartz crystal from the epithermal Ag deposits at Guanajuato, Mexico, showing two FIAs: one (FIA 1) contained within a growth band in the crystal and the other (FIA 2) outlining the growth surface that terminates the growth band. These two FIAs likely represent one fluid event associated with growth of the quartz crystal. (c) Photomicrograph of a portion of a quartz vein from the Copper Creek, Arizona, porphyry prospect showing two FIAs (pFIA 1 and pFIA 2) containing primary inclusions along growth surfaces in the crystal and two FIAs (sFIA 3 and sFIA 4) containing secondary inclusions trapped along healed fractures in the quartz. (d) Photomicrograph of a portion of a quartz vein from the Marte porphyry-epithermal system, Chile, showing an FIA consisting of vapor-rich fluid inclusions. (e) Photomicrograph of a portion of a fluorite crystal from the Cave-in-Rock district, southern Illinois, showing an FIA consisting of primary, negative crystal-shaped inclusions that are contained within a single color-banded growth zone in the fluorite crystal. (f) Photomicrograph of a portion of a fluorite crystal from the Cave-in-Rock district, southern Illinois, showing an FIA consisting of primary, irregularly shaped inclusions that are all contained within a single growth band in the fluorite. Note that even though the inclusions are mostly irregularly shaped, they all homogenize at the same temperature (±1°C).

Examples of fluid inclusion assemblages (FIAs) containing primary fluid inc... Open Access

Published: 01 December 2018
trapped along healed fractures in the quartz. (d) Photomicrograph of a portion of a quartz vein from the Marte porphyry-epithermal system, Chile, showing an FIA consisting of vapor-rich fluid inclusions. (e) Photomicrograph of a portion of a fluorite crystal from the Cave-in-Rock district, southern
Image
Backscattered electron images showing (a) occurrence and mineral associations of chukochenite and (b) euhedral chukochenite crystals among fluorite crystals. Abbreviations: Ckc = chukochenite; Fl = fluorite; Na-M = Na-matgarite.

Backscattered electron images showing ( a ) occurrence and mineral associat... Available to Purchase

Published: 01 May 2022
Figure 1. Backscattered electron images showing ( a ) occurrence and mineral associations of chukochenite and ( b ) euhedral chukochenite crystals among fluorite crystals. Abbreviations: Ckc = chukochenite; Fl = fluorite; Na-M = Na-matgarite.