Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation
The Viburnum Trend of southeast Missouri is one of the world’s largest producers of lead. The lead occurs as galena, predominantly in two crystallographic forms, octahedrons and cubes. Many studies have shown that octahedral galena is paragentically early, the more abundant of the two crystal forms,...
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ftmissouriunivst:oai:scholarsmine.mst.edu:geosci_geo_peteng_facwork-2568 2023-05-15T17:46:48+02:00 Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation Hagni, Richard D. 2018-03-01T08:00:00Z application/pdf https://scholarsmine.mst.edu/geosci_geo_peteng_facwork/1557 https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=2568&context=geosci_geo_peteng_facwork unknown Scholars' Mine https://scholarsmine.mst.edu/geosci_geo_peteng_facwork/1557 https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=2568&context=geosci_geo_peteng_facwork © 2018 Richard D. Hagni, All rights reserved. http://creativecommons.org/licenses/by/4.0/ CC-BY Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works Galena Missouri Morphology Paragenesis Spinel twins Trace elements Viburnum Trend Geology text 2018 ftmissouriunivst 2022-08-09T21:17:25Z The Viburnum Trend of southeast Missouri is one of the world’s largest producers of lead. The lead occurs as galena, predominantly in two crystallographic forms, octahedrons and cubes. Many studies have shown that octahedral galena is paragentically early, the more abundant of the two crystal forms, and is commonly modified in the cube. Those studies also have shown that the cubic form is paragenetically later, less abundant than the octahedrons, and may exhibit minor octahedral modifications. Viburnum Trend galena crystals that exhibit a platy form have received almost no study. The reason for their lack of study is the rarity of their occurrence. This communication discusses their character, mine distribution, paragenetic position, trace element contents, nature of twinning, and speculated conditions of formation. It also compares their character to similar platy galena occurrences in Germany, Bulgaria, Russia, Mexico, and notes their occurrence at the Pine Point District in the Northwest Territories of Canada and at the Black Cloud mine in Colorado. Flat, platy galena crystals have been recognized to occur in very small amounts in the Magmont, Buick, Fletcher, Brushy Creek, and Sweetwater mines in the Viburnum Trend. In contrast, platy galena has never been observed to occur at the Casteel, West Fork, #27, #28, and #29 mines in the Trend. The platy crystals have formed early in the paragenetic sequence of the ores, prior to and coated by subsequently deposited druzy quartz and cubic galena. Spinel twinning of the octahedron produces flat platy crystals. The platy galena crystals of the Viburnum Trend are very similar in crystal morphology to platy galena crystals interpreted to be spinel twins in the Gonderbach Ag mine in NW Germany, the Dalnegorsk Pb-Zn (skarn deposit) mine in SE Russia, the Madan ore field of skarn Pb-Zn-Ag deposits of southern Bulgaria, and the large Naica skarn Pb mine of northern Mexico. The crystallization of certain crystal forms of galena has been ascribed to the incorporation of ... Text Northwest Territories Missouri University of Science and Technology (Missouri S&T): Scholars' Mine Buick ENVELOPE(-121.221,-121.221,56.750,56.750) Canada Northwest Territories Pine Point ENVELOPE(-114.449,-114.449,60.834,60.834) Sweetwater ENVELOPE(-120.436,-120.436,55.917,55.917) |
institution |
Open Polar |
collection |
Missouri University of Science and Technology (Missouri S&T): Scholars' Mine |
op_collection_id |
ftmissouriunivst |
language |
unknown |
topic |
Galena Missouri Morphology Paragenesis Spinel twins Trace elements Viburnum Trend Geology |
spellingShingle |
Galena Missouri Morphology Paragenesis Spinel twins Trace elements Viburnum Trend Geology Hagni, Richard D. Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation |
topic_facet |
Galena Missouri Morphology Paragenesis Spinel twins Trace elements Viburnum Trend Geology |
description |
The Viburnum Trend of southeast Missouri is one of the world’s largest producers of lead. The lead occurs as galena, predominantly in two crystallographic forms, octahedrons and cubes. Many studies have shown that octahedral galena is paragentically early, the more abundant of the two crystal forms, and is commonly modified in the cube. Those studies also have shown that the cubic form is paragenetically later, less abundant than the octahedrons, and may exhibit minor octahedral modifications. Viburnum Trend galena crystals that exhibit a platy form have received almost no study. The reason for their lack of study is the rarity of their occurrence. This communication discusses their character, mine distribution, paragenetic position, trace element contents, nature of twinning, and speculated conditions of formation. It also compares their character to similar platy galena occurrences in Germany, Bulgaria, Russia, Mexico, and notes their occurrence at the Pine Point District in the Northwest Territories of Canada and at the Black Cloud mine in Colorado. Flat, platy galena crystals have been recognized to occur in very small amounts in the Magmont, Buick, Fletcher, Brushy Creek, and Sweetwater mines in the Viburnum Trend. In contrast, platy galena has never been observed to occur at the Casteel, West Fork, #27, #28, and #29 mines in the Trend. The platy crystals have formed early in the paragenetic sequence of the ores, prior to and coated by subsequently deposited druzy quartz and cubic galena. Spinel twinning of the octahedron produces flat platy crystals. The platy galena crystals of the Viburnum Trend are very similar in crystal morphology to platy galena crystals interpreted to be spinel twins in the Gonderbach Ag mine in NW Germany, the Dalnegorsk Pb-Zn (skarn deposit) mine in SE Russia, the Madan ore field of skarn Pb-Zn-Ag deposits of southern Bulgaria, and the large Naica skarn Pb mine of northern Mexico. The crystallization of certain crystal forms of galena has been ascribed to the incorporation of ... |
format |
Text |
author |
Hagni, Richard D. |
author_facet |
Hagni, Richard D. |
author_sort |
Hagni, Richard D. |
title |
Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation |
title_short |
Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation |
title_full |
Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation |
title_fullStr |
Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation |
title_full_unstemmed |
Platy Galena from the Viburnum Trend, Southeast Missouri: Character, Mine Distribution, Paragenetic Position, Trace Element Content, Nature of Twinning, and Conditions of Formation |
title_sort |
platy galena from the viburnum trend, southeast missouri: character, mine distribution, paragenetic position, trace element content, nature of twinning, and conditions of formation |
publisher |
Scholars' Mine |
publishDate |
2018 |
url |
https://scholarsmine.mst.edu/geosci_geo_peteng_facwork/1557 https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=2568&context=geosci_geo_peteng_facwork |
long_lat |
ENVELOPE(-121.221,-121.221,56.750,56.750) ENVELOPE(-114.449,-114.449,60.834,60.834) ENVELOPE(-120.436,-120.436,55.917,55.917) |
geographic |
Buick Canada Northwest Territories Pine Point Sweetwater |
geographic_facet |
Buick Canada Northwest Territories Pine Point Sweetwater |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_source |
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works |
op_relation |
https://scholarsmine.mst.edu/geosci_geo_peteng_facwork/1557 https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=2568&context=geosci_geo_peteng_facwork |
op_rights |
© 2018 Richard D. Hagni, All rights reserved. http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766150666480254976 |