Mineralogical Evidence for Fluid–Rock Interaction Accompanying Prograde Contact Metamorphism of Siliceous Dolomites: Alta Stock Aureole, Utah, USA
Contact metamorphism of siliceous dolomite in the southern part of the metamorphic aureole of the Alta stock (Utah, USA) produced the prograde isograd sequence: talc (Tc), tremolite (Tr), forsterite (Fo), and periclase (Per). Calcite (Cc)-dolomite (Do) geothermometry and phase equilibria define a ge...
Gespeichert in:
| Veröffentlicht in: | Journal of petrology 2000-06, Vol.41 (6), p.739-757 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 757 |
|---|---|
| container_issue | 6 |
| container_start_page | 739 |
| container_title | Journal of petrology |
| container_volume | 41 |
| creator | COOK, STEPHEN J. BOWMAN, JOHN R. |
| description | Contact metamorphism of siliceous dolomite in the southern part of the metamorphic aureole of the Alta stock (Utah, USA) produced the prograde isograd sequence: talc (Tc), tremolite (Tr), forsterite (Fo), and periclase (Per). Calcite (Cc)-dolomite (Do) geothermometry and phase equilibria define a general prograde T-X(CO |
| doi_str_mv | 10.1093/petrology/41.6.739 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_219894761</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>374199801</sourcerecordid><originalsourceid>FETCH-LOGICAL-a339t-66f5fa09b843c24c5f93d6321ce07416a25c0afe995dd65be45b564dbb4745f43</originalsourceid><addsrcrecordid>eNo9kEtKBDEQhoMoOD4u4Cq4tsek8xjjrhnHByiKo-uQTidjtLvTJmlhdt5BT-hJjChuqqD46q_iA-AAoylGghwPJgXf-tX6mOIpn86I2AATTDkqSorZJpggVJYFYQRtg50YnxHCeY4m4PPG9SaovOq0auHizTWm1wZaH-B5O7rm6_3j3usXeNWnzOnkfA8rrX03qH7t-hW8C34VVGPg3PcpA_DGJNX5MDy52EFv4dK1Ths_RniWX-xcMvEUVm1ScJl-kqsxGN-aI_iY1FOuy2oPbFnVRrP_13fB4_niYX5ZXN9eXM2r60IRIlLBuWVWIVGfUKJLqpkVpOGkxNqgGcVclUwjZY0QrGk4qw1lNeO0qWs6o8xSsgsOf3OH4F9HE5N89mPo80lZYnEi6IzjDJW_kA4-xmCsHILrVFhLjOSPfPkvX1IsuczyyTefin3d</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>219894761</pqid></control><display><type>article</type><title>Mineralogical Evidence for Fluid–Rock Interaction Accompanying Prograde Contact Metamorphism of Siliceous Dolomites: Alta Stock Aureole, Utah, USA</title><source>Oxford University Press Journals All Titles (1996-Current)</source><source>EZB-FREE-00999 freely available EZB journals</source><source>Alma/SFX Local Collection</source><source>Free Full-Text Journals in Chemistry</source><creator>COOK, STEPHEN J. ; BOWMAN, JOHN R.</creator><creatorcontrib>COOK, STEPHEN J. ; BOWMAN, JOHN R.</creatorcontrib><description><![CDATA[Contact metamorphism of siliceous dolomite in the southern part of the metamorphic aureole of the Alta stock (Utah, USA) produced the prograde isograd sequence: talc (Tc), tremolite (Tr), forsterite (Fo), and periclase (Per). Calcite (Cc)-dolomite (Do) geothermometry and phase equilibria define a general prograde T-X(CO<2<) path of decreasing X(CO<2<) with rising temperature for the dolomite. High-variance assemblages typify the aureole. Per + Cc and Fo + Cc + Do characterize the inner aureole (Per and Fo zones), and Tr + Do + Cc and Tc + Do + Cc are widespread in the outer aureole (Tr and Tc zones). Low-variance assemblages are rare and the thickness of reaction zones (coexisting reactant and product minerals) at the isogradic reaction fronts are narrow (tens of metres or less). The mineral assemblages, calculated progress of isograd reactions, and the prograde T-X(CO<2<) path all indicate that massive dolomite was infiltrated by significant fluxes of water-rich fluids during prograde metamorphism, and that the fluid flow was down-temperature and laterally away from the igneous contact. Fluid infiltration continued through at least the initial retrograde cooling of the periclase zone. Down-T fluid flow is also consistent with the results of Cc-Do geothermometry and patterns of <18<O depletion in this area. The close spatial association of reacted and unreacted chert nodules in both the tremolite and talc zones plus the formation of tremolite by two reactions indicate that the outer aureole varied in X(CO<2<), and imply that fluid flow in the outer aureole was heterogeneous. The occurrence of dolomite-rich and periclase (brucite)-absent, high-[delta]<18<O marble layers within the periclase zone indicates that fluid flow in the innermost aureole was also heterogeneous. Estimates of the average time-integrated fluid flux (q<m<<TIFF<) experienced by the periclase, forsterite, and tremolite zones are 4[middot]2 x 10<7<, 6[middot]65 x 10<5<, and 2[middot]0 x 10<5< mol fluid/m<2<, respectively. The average value of q<m<<TIFF< for the periclase zone agrees well with the q<m<<TIFF< (3[middot]4 x 10<7<mol/m<2<) determined by numerical simulation of the temperature and <18<O depletion profiles preserved in the southern aureole. The estimates of q<m<<TIFF< for the forsterite and tremolite zones have much greater uncertainty, but may indicate that fluid flux was considerably lower in these zones than in the periclase zone. Given the outward (down-temperature), subhorizontal flow geometry indicated by a variety of petrologic, geochemical, and geothermometry evidence presented here and elsewhere, this decrease implies that fluid has leaked from the flow system between the periclase and tremolite zones.]]></description><identifier>ISSN: 0022-3530</identifier><identifier>EISSN: 1460-2415</identifier><identifier>DOI: 10.1093/petrology/41.6.739</identifier><language>eng</language><publisher>Oxford: Oxford Publishing Limited (England)</publisher><ispartof>Journal of petrology, 2000-06, Vol.41 (6), p.739-757</ispartof><rights>Copyright Oxford University Press(England) Jun 2000</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a339t-66f5fa09b843c24c5f93d6321ce07416a25c0afe995dd65be45b564dbb4745f43</citedby><cites>FETCH-LOGICAL-a339t-66f5fa09b843c24c5f93d6321ce07416a25c0afe995dd65be45b564dbb4745f43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>COOK, STEPHEN J.</creatorcontrib><creatorcontrib>BOWMAN, JOHN R.</creatorcontrib><title>Mineralogical Evidence for Fluid–Rock Interaction Accompanying Prograde Contact Metamorphism of Siliceous Dolomites: Alta Stock Aureole, Utah, USA</title><title>Journal of petrology</title><description><![CDATA[Contact metamorphism of siliceous dolomite in the southern part of the metamorphic aureole of the Alta stock (Utah, USA) produced the prograde isograd sequence: talc (Tc), tremolite (Tr), forsterite (Fo), and periclase (Per). Calcite (Cc)-dolomite (Do) geothermometry and phase equilibria define a general prograde T-X(CO<2<) path of decreasing X(CO<2<) with rising temperature for the dolomite. High-variance assemblages typify the aureole. Per + Cc and Fo + Cc + Do characterize the inner aureole (Per and Fo zones), and Tr + Do + Cc and Tc + Do + Cc are widespread in the outer aureole (Tr and Tc zones). Low-variance assemblages are rare and the thickness of reaction zones (coexisting reactant and product minerals) at the isogradic reaction fronts are narrow (tens of metres or less). The mineral assemblages, calculated progress of isograd reactions, and the prograde T-X(CO<2<) path all indicate that massive dolomite was infiltrated by significant fluxes of water-rich fluids during prograde metamorphism, and that the fluid flow was down-temperature and laterally away from the igneous contact. Fluid infiltration continued through at least the initial retrograde cooling of the periclase zone. Down-T fluid flow is also consistent with the results of Cc-Do geothermometry and patterns of <18<O depletion in this area. The close spatial association of reacted and unreacted chert nodules in both the tremolite and talc zones plus the formation of tremolite by two reactions indicate that the outer aureole varied in X(CO<2<), and imply that fluid flow in the outer aureole was heterogeneous. The occurrence of dolomite-rich and periclase (brucite)-absent, high-[delta]<18<O marble layers within the periclase zone indicates that fluid flow in the innermost aureole was also heterogeneous. Estimates of the average time-integrated fluid flux (q<m<<TIFF<) experienced by the periclase, forsterite, and tremolite zones are 4[middot]2 x 10<7<, 6[middot]65 x 10<5<, and 2[middot]0 x 10<5< mol fluid/m<2<, respectively. The average value of q<m<<TIFF< for the periclase zone agrees well with the q<m<<TIFF< (3[middot]4 x 10<7<mol/m<2<) determined by numerical simulation of the temperature and <18<O depletion profiles preserved in the southern aureole. The estimates of q<m<<TIFF< for the forsterite and tremolite zones have much greater uncertainty, but may indicate that fluid flux was considerably lower in these zones than in the periclase zone. Given the outward (down-temperature), subhorizontal flow geometry indicated by a variety of petrologic, geochemical, and geothermometry evidence presented here and elsewhere, this decrease implies that fluid has leaked from the flow system between the periclase and tremolite zones.]]></description><issn>0022-3530</issn><issn>1460-2415</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNo9kEtKBDEQhoMoOD4u4Cq4tsek8xjjrhnHByiKo-uQTidjtLvTJmlhdt5BT-hJjChuqqD46q_iA-AAoylGghwPJgXf-tX6mOIpn86I2AATTDkqSorZJpggVJYFYQRtg50YnxHCeY4m4PPG9SaovOq0auHizTWm1wZaH-B5O7rm6_3j3usXeNWnzOnkfA8rrX03qH7t-hW8C34VVGPg3PcpA_DGJNX5MDy52EFv4dK1Ths_RniWX-xcMvEUVm1ScJl-kqsxGN-aI_iY1FOuy2oPbFnVRrP_13fB4_niYX5ZXN9eXM2r60IRIlLBuWVWIVGfUKJLqpkVpOGkxNqgGcVclUwjZY0QrGk4qw1lNeO0qWs6o8xSsgsOf3OH4F9HE5N89mPo80lZYnEi6IzjDJW_kA4-xmCsHILrVFhLjOSPfPkvX1IsuczyyTefin3d</recordid><startdate>20000601</startdate><enddate>20000601</enddate><creator>COOK, STEPHEN J.</creator><creator>BOWMAN, JOHN R.</creator><general>Oxford Publishing Limited (England)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>JG9</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope></search><sort><creationdate>20000601</creationdate><title>Mineralogical Evidence for Fluid–Rock Interaction Accompanying Prograde Contact Metamorphism of Siliceous Dolomites: Alta Stock Aureole, Utah, USA</title><author>COOK, STEPHEN J. ; BOWMAN, JOHN R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a339t-66f5fa09b843c24c5f93d6321ce07416a25c0afe995dd65be45b564dbb4745f43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>COOK, STEPHEN J.</creatorcontrib><creatorcontrib>BOWMAN, JOHN R.</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of petrology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>COOK, STEPHEN J.</au><au>BOWMAN, JOHN R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mineralogical Evidence for Fluid–Rock Interaction Accompanying Prograde Contact Metamorphism of Siliceous Dolomites: Alta Stock Aureole, Utah, USA</atitle><jtitle>Journal of petrology</jtitle><date>2000-06-01</date><risdate>2000</risdate><volume>41</volume><issue>6</issue><spage>739</spage><epage>757</epage><pages>739-757</pages><issn>0022-3530</issn><eissn>1460-2415</eissn><abstract><![CDATA[Contact metamorphism of siliceous dolomite in the southern part of the metamorphic aureole of the Alta stock (Utah, USA) produced the prograde isograd sequence: talc (Tc), tremolite (Tr), forsterite (Fo), and periclase (Per). Calcite (Cc)-dolomite (Do) geothermometry and phase equilibria define a general prograde T-X(CO<2<) path of decreasing X(CO<2<) with rising temperature for the dolomite. High-variance assemblages typify the aureole. Per + Cc and Fo + Cc + Do characterize the inner aureole (Per and Fo zones), and Tr + Do + Cc and Tc + Do + Cc are widespread in the outer aureole (Tr and Tc zones). Low-variance assemblages are rare and the thickness of reaction zones (coexisting reactant and product minerals) at the isogradic reaction fronts are narrow (tens of metres or less). The mineral assemblages, calculated progress of isograd reactions, and the prograde T-X(CO<2<) path all indicate that massive dolomite was infiltrated by significant fluxes of water-rich fluids during prograde metamorphism, and that the fluid flow was down-temperature and laterally away from the igneous contact. Fluid infiltration continued through at least the initial retrograde cooling of the periclase zone. Down-T fluid flow is also consistent with the results of Cc-Do geothermometry and patterns of <18<O depletion in this area. The close spatial association of reacted and unreacted chert nodules in both the tremolite and talc zones plus the formation of tremolite by two reactions indicate that the outer aureole varied in X(CO<2<), and imply that fluid flow in the outer aureole was heterogeneous. The occurrence of dolomite-rich and periclase (brucite)-absent, high-[delta]<18<O marble layers within the periclase zone indicates that fluid flow in the innermost aureole was also heterogeneous. Estimates of the average time-integrated fluid flux (q<m<<TIFF<) experienced by the periclase, forsterite, and tremolite zones are 4[middot]2 x 10<7<, 6[middot]65 x 10<5<, and 2[middot]0 x 10<5< mol fluid/m<2<, respectively. The average value of q<m<<TIFF< for the periclase zone agrees well with the q<m<<TIFF< (3[middot]4 x 10<7<mol/m<2<) determined by numerical simulation of the temperature and <18<O depletion profiles preserved in the southern aureole. The estimates of q<m<<TIFF< for the forsterite and tremolite zones have much greater uncertainty, but may indicate that fluid flux was considerably lower in these zones than in the periclase zone. Given the outward (down-temperature), subhorizontal flow geometry indicated by a variety of petrologic, geochemical, and geothermometry evidence presented here and elsewhere, this decrease implies that fluid has leaked from the flow system between the periclase and tremolite zones.]]></abstract><cop>Oxford</cop><pub>Oxford Publishing Limited (England)</pub><doi>10.1093/petrology/41.6.739</doi><tpages>19</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0022-3530 |
| ispartof | Journal of petrology, 2000-06, Vol.41 (6), p.739-757 |
| issn | 0022-3530 1460-2415 |
| language | eng |
| recordid | cdi_proquest_journals_219894761 |
| source | Oxford University Press Journals All Titles (1996-Current); EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| title | Mineralogical Evidence for Fluid–Rock Interaction Accompanying Prograde Contact Metamorphism of Siliceous Dolomites: Alta Stock Aureole, Utah, USA |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-05T12%3A55%3A44IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Mineralogical%20Evidence%20for%20Fluid%E2%80%93Rock%20Interaction%20Accompanying%20Prograde%20Contact%20Metamorphism%20of%20Siliceous%20Dolomites:%20Alta%20Stock%20Aureole,%20Utah,%20USA&rft.jtitle=Journal%20of%20petrology&rft.au=COOK,%20STEPHEN%20J.&rft.date=2000-06-01&rft.volume=41&rft.issue=6&rft.spage=739&rft.epage=757&rft.pages=739-757&rft.issn=0022-3530&rft.eissn=1460-2415&rft_id=info:doi/10.1093/petrology/41.6.739&rft_dat=%3Cproquest_cross%3E374199801%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=219894761&rft_id=info:pmid/&rfr_iscdi=true |