Rb-Sr study of Au-Ag Shkol'noe deposit (Kurama Mountains, north Tadjikistan): age of mineralization and time scale of hydrothermal processes
The epithermal Au-Ag Shkol'noe deposit is located in the Kandjol ore field, Kurama Mountains. This region is a part of the east-west trending Late Hercynian Bel'tau-Kurama volcanic belt, an Andean-style collisional margin. The deposit comprises a number of quartz-carbonate veins hosted by...
Gespeichert in:
Veröffentlicht in: | Mineralium deposita 1999-05, Vol.34 (4), p.405-413 |
---|---|
Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | 413 |
---|---|
container_issue | 4 |
container_start_page | 405 |
container_title | Mineralium deposita |
container_volume | 34 |
creator | Moralev, G. V. Shatagin, K. N. |
description | The epithermal Au-Ag Shkol'noe deposit is located in the Kandjol ore field, Kurama Mountains. This region is a part of the east-west trending Late Hercynian Bel'tau-Kurama volcanic belt, an Andean-style collisional margin. The deposit comprises a number of quartz-carbonate veins hosted by the syn-subductional Middle Carboniferous Karamazar granodiorites. The Au-Ag mineralization is considered to be the result of the earliest hydrothermal event in the region. The Rb-Sr isochron age 296.3±1.3Ma and an initial ^sup 87^Sr/^sup 86^Sr^sub 0^=0.7071±2 ratio were obtained for an adularia-sericite-quartz-calcite sample from Au-Ag mineralization. The ^sup 87^Sr/^sup 86^Sr ratio range from 0.70645±10 to 0.70741±10 was obtained for the calcites from the earlier and later mineral assemblages. The Rb-Sr age is interpreted as a real geological age of the Au-Ag mineralization. It corresponds to the initial stage of the Late Carboniferous - Early Permian collision following the main syn-subduction stage of Bel'tau-Kurama volcanic belt evolution. The comparison of the Rb-Sr age with previously obtained ^sup 40^Ar-^sup 39^Ar and K-Ar data for adularia from the Au-Ag mineralization implies that gangue minerals of the Shkol'noe deposit bears the fingerprint of at least three events in its history. They are (1) Au-Ag mineralization at 296.3±1.3Ma; and (2) two subsequent thermal pulses at 277±4 and 263-267±8Ma. The minimum time scale for the hydrothermal activity within the Shkol'noe deposit is thus approximately 30 million years. A general uniformity of the strontium source during the hydrothermal processes within the Au-Ag Shkol'noe deposit (^sup 87^Sr/^sup 86^Sr^sub 0^=0.70645±10 to 0.70741±10) is suggested as well as within the Bel'tau-Kurama belt (^sup 87^Sr/^sup 86^Sr^sub 0^=0.7051-0.707). The slight shift into a higher strontium isotope composition of the hydrothermal minerals of the Shkol'noe deposit in comparison with other deposits and rocks of the Bel'tau-Kurama belt may be ascribed to the contribution of relatively radiogenic strontium from the Karamazar-type granitoids. The mobilization of low radiogenic strontium during propylitic alteration of diabase dikes emplaced after the Au-Ag mineralization could be responsible for comparatively low ^sup 87^Sr/^sup 86^Sr ratios in some of the latest post-dike carbonates.[PUBLICATION ABSTRACT] |
doi_str_mv | 10.1007/s001260050213 |
format | Article |
fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_884616268</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2431630701</sourcerecordid><originalsourceid>FETCH-LOGICAL-a285t-5d1ee061756b0da343b2b285bc3dd574c3e8f076797328ff1b0e8e4d7a74073</originalsourceid><addsrcrecordid>eNpVkL1OwzAYRS0EEqUwslssgETgc5zYLltV8SeKkGj3yImd1m1iF9sZyjPw0KSUhekO9-hc6SJ0TuCWAPC7AEBSBpBDSugBGpCMpgkRjB2iAUDKkiwfiWN0EsIKAEYkgwH6_iiTmcchdmqLXY3HXTJe4Nly7ZpL6zRWeuOCifjqtfOylfjNdTZKY8MNts7HJZ5LtTJrE6K01_dYLvTO0hqrvWzMl4zGWSytwtG0GodKNr_Acqu8i0vtW9ngjXeVDkGHU3RUyybos78cotnjw3zynEzfn14m42kiU5HHJFdEa2CE56wEJWlGy7Tsm7KiSuU8q6gWNXDGR5ymoq5JCVroTHHJM-B0iC721n73s9MhFivXedsPFkJkjLCUiR5K9lDlXQhe18XGm1b6bUGg2L1d_Hub_gB-w3Ke</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>884616268</pqid></control><display><type>article</type><title>Rb-Sr study of Au-Ag Shkol'noe deposit (Kurama Mountains, north Tadjikistan): age of mineralization and time scale of hydrothermal processes</title><source>SpringerNature Journals</source><creator>Moralev, G. V. ; Shatagin, K. N.</creator><creatorcontrib>Moralev, G. V. ; Shatagin, K. N.</creatorcontrib><description>The epithermal Au-Ag Shkol'noe deposit is located in the Kandjol ore field, Kurama Mountains. This region is a part of the east-west trending Late Hercynian Bel'tau-Kurama volcanic belt, an Andean-style collisional margin. The deposit comprises a number of quartz-carbonate veins hosted by the syn-subductional Middle Carboniferous Karamazar granodiorites. The Au-Ag mineralization is considered to be the result of the earliest hydrothermal event in the region. The Rb-Sr isochron age 296.3±1.3Ma and an initial ^sup 87^Sr/^sup 86^Sr^sub 0^=0.7071±2 ratio were obtained for an adularia-sericite-quartz-calcite sample from Au-Ag mineralization. The ^sup 87^Sr/^sup 86^Sr ratio range from 0.70645±10 to 0.70741±10 was obtained for the calcites from the earlier and later mineral assemblages. The Rb-Sr age is interpreted as a real geological age of the Au-Ag mineralization. It corresponds to the initial stage of the Late Carboniferous - Early Permian collision following the main syn-subduction stage of Bel'tau-Kurama volcanic belt evolution. The comparison of the Rb-Sr age with previously obtained ^sup 40^Ar-^sup 39^Ar and K-Ar data for adularia from the Au-Ag mineralization implies that gangue minerals of the Shkol'noe deposit bears the fingerprint of at least three events in its history. They are (1) Au-Ag mineralization at 296.3±1.3Ma; and (2) two subsequent thermal pulses at 277±4 and 263-267±8Ma. The minimum time scale for the hydrothermal activity within the Shkol'noe deposit is thus approximately 30 million years. A general uniformity of the strontium source during the hydrothermal processes within the Au-Ag Shkol'noe deposit (^sup 87^Sr/^sup 86^Sr^sub 0^=0.70645±10 to 0.70741±10) is suggested as well as within the Bel'tau-Kurama belt (^sup 87^Sr/^sup 86^Sr^sub 0^=0.7051-0.707). The slight shift into a higher strontium isotope composition of the hydrothermal minerals of the Shkol'noe deposit in comparison with other deposits and rocks of the Bel'tau-Kurama belt may be ascribed to the contribution of relatively radiogenic strontium from the Karamazar-type granitoids. The mobilization of low radiogenic strontium during propylitic alteration of diabase dikes emplaced after the Au-Ag mineralization could be responsible for comparatively low ^sup 87^Sr/^sup 86^Sr ratios in some of the latest post-dike carbonates.[PUBLICATION ABSTRACT]</description><identifier>ISSN: 0026-4598</identifier><identifier>EISSN: 1432-1866</identifier><identifier>DOI: 10.1007/s001260050213</identifier><language>eng</language><publisher>Heidelberg: Springer Nature B.V</publisher><subject>Calcite ; Carbonates ; Carboniferous ; Dikes ; Geological time ; Geology ; Isotopes ; Mineralization ; Mineralogy ; Minerals ; Mountains ; Permian ; Quartz ; Strontium ; Volcanic belts</subject><ispartof>Mineralium deposita, 1999-05, Vol.34 (4), p.405-413</ispartof><rights>Springer-Verlag Berlin Heidelberg 1999</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a285t-5d1ee061756b0da343b2b285bc3dd574c3e8f076797328ff1b0e8e4d7a74073</citedby></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>Moralev, G. V.</creatorcontrib><creatorcontrib>Shatagin, K. N.</creatorcontrib><title>Rb-Sr study of Au-Ag Shkol'noe deposit (Kurama Mountains, north Tadjikistan): age of mineralization and time scale of hydrothermal processes</title><title>Mineralium deposita</title><description>The epithermal Au-Ag Shkol'noe deposit is located in the Kandjol ore field, Kurama Mountains. This region is a part of the east-west trending Late Hercynian Bel'tau-Kurama volcanic belt, an Andean-style collisional margin. The deposit comprises a number of quartz-carbonate veins hosted by the syn-subductional Middle Carboniferous Karamazar granodiorites. The Au-Ag mineralization is considered to be the result of the earliest hydrothermal event in the region. The Rb-Sr isochron age 296.3±1.3Ma and an initial ^sup 87^Sr/^sup 86^Sr^sub 0^=0.7071±2 ratio were obtained for an adularia-sericite-quartz-calcite sample from Au-Ag mineralization. The ^sup 87^Sr/^sup 86^Sr ratio range from 0.70645±10 to 0.70741±10 was obtained for the calcites from the earlier and later mineral assemblages. The Rb-Sr age is interpreted as a real geological age of the Au-Ag mineralization. It corresponds to the initial stage of the Late Carboniferous - Early Permian collision following the main syn-subduction stage of Bel'tau-Kurama volcanic belt evolution. The comparison of the Rb-Sr age with previously obtained ^sup 40^Ar-^sup 39^Ar and K-Ar data for adularia from the Au-Ag mineralization implies that gangue minerals of the Shkol'noe deposit bears the fingerprint of at least three events in its history. They are (1) Au-Ag mineralization at 296.3±1.3Ma; and (2) two subsequent thermal pulses at 277±4 and 263-267±8Ma. The minimum time scale for the hydrothermal activity within the Shkol'noe deposit is thus approximately 30 million years. A general uniformity of the strontium source during the hydrothermal processes within the Au-Ag Shkol'noe deposit (^sup 87^Sr/^sup 86^Sr^sub 0^=0.70645±10 to 0.70741±10) is suggested as well as within the Bel'tau-Kurama belt (^sup 87^Sr/^sup 86^Sr^sub 0^=0.7051-0.707). The slight shift into a higher strontium isotope composition of the hydrothermal minerals of the Shkol'noe deposit in comparison with other deposits and rocks of the Bel'tau-Kurama belt may be ascribed to the contribution of relatively radiogenic strontium from the Karamazar-type granitoids. The mobilization of low radiogenic strontium during propylitic alteration of diabase dikes emplaced after the Au-Ag mineralization could be responsible for comparatively low ^sup 87^Sr/^sup 86^Sr ratios in some of the latest post-dike carbonates.[PUBLICATION ABSTRACT]</description><subject>Calcite</subject><subject>Carbonates</subject><subject>Carboniferous</subject><subject>Dikes</subject><subject>Geological time</subject><subject>Geology</subject><subject>Isotopes</subject><subject>Mineralization</subject><subject>Mineralogy</subject><subject>Minerals</subject><subject>Mountains</subject><subject>Permian</subject><subject>Quartz</subject><subject>Strontium</subject><subject>Volcanic belts</subject><issn>0026-4598</issn><issn>1432-1866</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNpVkL1OwzAYRS0EEqUwslssgETgc5zYLltV8SeKkGj3yImd1m1iF9sZyjPw0KSUhekO9-hc6SJ0TuCWAPC7AEBSBpBDSugBGpCMpgkRjB2iAUDKkiwfiWN0EsIKAEYkgwH6_iiTmcchdmqLXY3HXTJe4Nly7ZpL6zRWeuOCifjqtfOylfjNdTZKY8MNts7HJZ5LtTJrE6K01_dYLvTO0hqrvWzMl4zGWSytwtG0GodKNr_Acqu8i0vtW9ngjXeVDkGHU3RUyybos78cotnjw3zynEzfn14m42kiU5HHJFdEa2CE56wEJWlGy7Tsm7KiSuU8q6gWNXDGR5ymoq5JCVroTHHJM-B0iC721n73s9MhFivXedsPFkJkjLCUiR5K9lDlXQhe18XGm1b6bUGg2L1d_Hub_gB-w3Ke</recordid><startdate>19990501</startdate><enddate>19990501</enddate><creator>Moralev, G. V.</creator><creator>Shatagin, K. N.</creator><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7XB</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope></search><sort><creationdate>19990501</creationdate><title>Rb-Sr study of Au-Ag Shkol'noe deposit (Kurama Mountains, north Tadjikistan): age of mineralization and time scale of hydrothermal processes</title><author>Moralev, G. V. ; Shatagin, K. N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a285t-5d1ee061756b0da343b2b285bc3dd574c3e8f076797328ff1b0e8e4d7a74073</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Calcite</topic><topic>Carbonates</topic><topic>Carboniferous</topic><topic>Dikes</topic><topic>Geological time</topic><topic>Geology</topic><topic>Isotopes</topic><topic>Mineralization</topic><topic>Mineralogy</topic><topic>Minerals</topic><topic>Mountains</topic><topic>Permian</topic><topic>Quartz</topic><topic>Strontium</topic><topic>Volcanic belts</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Moralev, G. V.</creatorcontrib><creatorcontrib>Shatagin, K. N.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Science Database</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><jtitle>Mineralium deposita</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Moralev, G. V.</au><au>Shatagin, K. N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rb-Sr study of Au-Ag Shkol'noe deposit (Kurama Mountains, north Tadjikistan): age of mineralization and time scale of hydrothermal processes</atitle><jtitle>Mineralium deposita</jtitle><date>1999-05-01</date><risdate>1999</risdate><volume>34</volume><issue>4</issue><spage>405</spage><epage>413</epage><pages>405-413</pages><issn>0026-4598</issn><eissn>1432-1866</eissn><abstract>The epithermal Au-Ag Shkol'noe deposit is located in the Kandjol ore field, Kurama Mountains. This region is a part of the east-west trending Late Hercynian Bel'tau-Kurama volcanic belt, an Andean-style collisional margin. The deposit comprises a number of quartz-carbonate veins hosted by the syn-subductional Middle Carboniferous Karamazar granodiorites. The Au-Ag mineralization is considered to be the result of the earliest hydrothermal event in the region. The Rb-Sr isochron age 296.3±1.3Ma and an initial ^sup 87^Sr/^sup 86^Sr^sub 0^=0.7071±2 ratio were obtained for an adularia-sericite-quartz-calcite sample from Au-Ag mineralization. The ^sup 87^Sr/^sup 86^Sr ratio range from 0.70645±10 to 0.70741±10 was obtained for the calcites from the earlier and later mineral assemblages. The Rb-Sr age is interpreted as a real geological age of the Au-Ag mineralization. It corresponds to the initial stage of the Late Carboniferous - Early Permian collision following the main syn-subduction stage of Bel'tau-Kurama volcanic belt evolution. The comparison of the Rb-Sr age with previously obtained ^sup 40^Ar-^sup 39^Ar and K-Ar data for adularia from the Au-Ag mineralization implies that gangue minerals of the Shkol'noe deposit bears the fingerprint of at least three events in its history. They are (1) Au-Ag mineralization at 296.3±1.3Ma; and (2) two subsequent thermal pulses at 277±4 and 263-267±8Ma. The minimum time scale for the hydrothermal activity within the Shkol'noe deposit is thus approximately 30 million years. A general uniformity of the strontium source during the hydrothermal processes within the Au-Ag Shkol'noe deposit (^sup 87^Sr/^sup 86^Sr^sub 0^=0.70645±10 to 0.70741±10) is suggested as well as within the Bel'tau-Kurama belt (^sup 87^Sr/^sup 86^Sr^sub 0^=0.7051-0.707). The slight shift into a higher strontium isotope composition of the hydrothermal minerals of the Shkol'noe deposit in comparison with other deposits and rocks of the Bel'tau-Kurama belt may be ascribed to the contribution of relatively radiogenic strontium from the Karamazar-type granitoids. The mobilization of low radiogenic strontium during propylitic alteration of diabase dikes emplaced after the Au-Ag mineralization could be responsible for comparatively low ^sup 87^Sr/^sup 86^Sr ratios in some of the latest post-dike carbonates.[PUBLICATION ABSTRACT]</abstract><cop>Heidelberg</cop><pub>Springer Nature B.V</pub><doi>10.1007/s001260050213</doi><tpages>9</tpages></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0026-4598 |
ispartof | Mineralium deposita, 1999-05, Vol.34 (4), p.405-413 |
issn | 0026-4598 1432-1866 |
language | eng |
recordid | cdi_proquest_journals_884616268 |
source | SpringerNature Journals |
subjects | Calcite Carbonates Carboniferous Dikes Geological time Geology Isotopes Mineralization Mineralogy Minerals Mountains Permian Quartz Strontium Volcanic belts |
title | Rb-Sr study of Au-Ag Shkol'noe deposit (Kurama Mountains, north Tadjikistan): age of mineralization and time scale of hydrothermal processes |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-23T10%3A13%3A29IST&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=Rb-Sr%20study%20of%20Au-Ag%20Shkol'noe%20deposit%20(Kurama%20Mountains,%20north%20Tadjikistan):%20age%20of%20mineralization%20and%20time%20scale%20of%20hydrothermal%20processes&rft.jtitle=Mineralium%20deposita&rft.au=Moralev,%20G.%20V.&rft.date=1999-05-01&rft.volume=34&rft.issue=4&rft.spage=405&rft.epage=413&rft.pages=405-413&rft.issn=0026-4598&rft.eissn=1432-1866&rft_id=info:doi/10.1007/s001260050213&rft_dat=%3Cproquest_cross%3E2431630701%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=884616268&rft_id=info:pmid/&rfr_iscdi=true |