{"id":{"repo_id":"rice","oai_identifier":"oai:repository.rice.edu:1911/14009"},"canonical_url":"https://search.dev.ndltd.org/etd/rice/oai:repository.rice.edu:1911/14009","repository":{"repo_id":"rice","name":"Rice University","base_url":"https://repository.rice.edu/server/oai/request"},"display":{"title":"Boron metasomatism in the Alta stock contact aureole, Utah","abstract":"The effects of fluid evolution and infiltration in the Alta stock contact aureole, Utah, were studied by evaluating chemical additions and depletions in igneous, replacement skarn, and carbonate whole-rock samples. Of the major and trace elements studied, boron proved to be the most interesting tracer of fluid, due in part to extensive borate mineralization (ludwigite and kotoite) in carbonates near the stock contact, and in part to the physical-chemical properties of boron which make it a useful element for isotopic studies and for spatial distribution analysis via alpha track mapping. Boron is enriched throughout the Alta aureole and is hosted by a variety of metamorphic and metasomatic silicate minerals (forsterite and humite group are the most significant). Aureole whole-rock B concentrations increase toward the contact, indicating that B originated in the stock and migrated down-temperature in exsolved magmatic fluids. Boron stable isotope measurements of carbonates, skarns and mineral separates range from $-$7.2 to +1.6$\\perthous\\ \\delta\\sp{11}$B. A value of ${-}6.0\\perthous$ for a B-enriched igneous sill falls within this range and also indicates that the stock is the source of aureole B-enrichments.","abstract_html":"The effects of fluid evolution and infiltration in the Alta stock contact aureole, Utah, were studied by evaluating chemical additions and depletions in igneous, replacement skarn, and carbonate whole-rock samples. Of the major and trace elements studied, boron proved to be the most interesting tracer of fluid, due in part to extensive borate mineralization (ludwigite and kotoite) in carbonates near the stock contact, and in part to the physical-chemical properties of boron which make it a useful element for isotopic studies and for spatial distribution analysis via alpha track mapping. Boron is enriched throughout the Alta aureole and is hosted by a variety of metamorphic and metasomatic silicate minerals (forsterite and humite group are the most significant). Aureole whole-rock B concentrations increase toward the contact, indicating that B originated in the stock and migrated down-temperature in exsolved magmatic fluids. Boron stable isotope measurements of carbonates, skarns and mineral separates range from $-$7.2 to +1.6<span class=\"etd-inline-math\">\\perthous &delta;\\sp{11}</span>B. A value of ${-}6.0\\perthous$ for a B-enriched igneous sill falls within this range and also indicates that the stock is the source of aureole B-enrichments.","abstract_has_math":true,"creators":["Woodford, Darrell Todd"],"institution":"Rice University","degree_name":"Master of Arts","degree_level":"Masters","degree_discipline":"Natural Sciences","degree_department":null,"school":null,"contributors":[],"advisors":["Leeman, William P."],"committee_chairs":[],"committee_members":[],"year":1995,"date_issued":"1995","date_published":"1995","updated_at":"2026-07-24T04:10:19Z","subjects":["Geochemistry","Geology"],"languages":["eng"],"rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1911/14009","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Leeman, William P."]},{"key":"dc:creator","label":"Author","values":["Woodford, Darrell Todd"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2009-06-04T00:33:35Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2009-06-04T00:33:35Z"]},{"key":"dc:date.issued","label":"Date","values":["1995"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Natural Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Arts"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Rice University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Geochemistry","Geology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1911/14009"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The effects of fluid evolution and infiltration in the Alta stock contact aureole, Utah, were studied by evaluating chemical additions and depletions in igneous, replacement skarn, and carbonate whole-rock samples. Of the major and trace elements studied, boron proved to be the most interesting tracer of fluid, due in part to extensive borate mineralization (ludwigite and kotoite) in carbonates near the stock contact, and in part to the physical-chemical properties of boron which make it a useful element for isotopic studies and for spatial distribution analysis via alpha track mapping. Boron is enriched throughout the Alta aureole and is hosted by a variety of metamorphic and metasomatic silicate minerals (forsterite and humite group are the most significant). Aureole whole-rock B concentrations increase toward the contact, indicating that B originated in the stock and migrated down-temperature in exsolved magmatic fluids. Boron stable isotope measurements of carbonates, skarns and mineral separates range from $-$7.2 to +1.6$\\perthous\\ \\delta\\sp{11}$B. A value of ${-}6.0\\perthous$ for a B-enriched igneous sill falls within this range and also indicates that the stock is the source of aureole B-enrichments."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Boron metasomatism in the Alta stock contact aureole, Utah"]}]}],"canonical_facts":{"dc:contributor.advisor":["Leeman, William P."],"dc:creator":["Woodford, Darrell Todd"],"dc:date.accessioned":["2009-06-04T00:33:35Z"],"dc:date.available":["2009-06-04T00:33:35Z"],"dc:date.issued":["1995"],"dc:description.abstract":["The effects of fluid evolution and infiltration in the Alta stock contact aureole, Utah, were studied by evaluating chemical additions and depletions in igneous, replacement skarn, and carbonate whole-rock samples. Of the major and trace elements studied, boron proved to be the most interesting tracer of fluid, due in part to extensive borate mineralization (ludwigite and kotoite) in carbonates near the stock contact, and in part to the physical-chemical properties of boron which make it a useful element for isotopic studies and for spatial distribution analysis via alpha track mapping. Boron is enriched throughout the Alta aureole and is hosted by a variety of metamorphic and metasomatic silicate minerals (forsterite and humite group are the most significant). Aureole whole-rock B concentrations increase toward the contact, indicating that B originated in the stock and migrated down-temperature in exsolved magmatic fluids. Boron stable isotope measurements of carbonates, skarns and mineral separates range from $-$7.2 to +1.6$\\perthous\\ \\delta\\sp{11}$B. A value of ${-}6.0\\perthous$ for a B-enriched igneous sill falls within this range and also indicates that the stock is the source of aureole B-enrichments."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/1911/14009"],"dc:language.iso":["eng"],"dc:rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"dc:subject":["Geochemistry","Geology"],"dc:title":["Boron metasomatism in the Alta stock contact aureole, Utah"],"dc:type":["Thesis"],"thesis:degree_discipline":["Natural Sciences"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Arts"],"thesis:institution_name":["Rice University"]},"updated_at":"2026-07-24T04:10:19Z"}