Volcanostratigraphy of arc volcanic sequences in the Kohistan arc, North Pakistan: volcanism within island arc, back-arc-basin, and intra-continental tectonic settings

The Kohistan arc was initiated, offshore of Asia, during the mid-Cretaceous above northward subducting, Tethyan oceanic crust. The arc sutured to Asia c. 90 Ma ago. Subduction of oceanic crust beneath the arc continued until Indian Plate continental rocks began to underthrust the arc c. 50 Ma ago. T...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of volcanology and geothermal research 2004-02, Vol.130 (1), p.147-178
Hauptverfasser: Petterson, Michael G., Treloar, Peter J.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 178
container_issue 1
container_start_page 147
container_title Journal of volcanology and geothermal research
container_volume 130
creator Petterson, Michael G.
Treloar, Peter J.
description The Kohistan arc was initiated, offshore of Asia, during the mid-Cretaceous above northward subducting, Tethyan oceanic crust. The arc sutured to Asia c. 90 Ma ago. Subduction of oceanic crust beneath the arc continued until Indian Plate continental rocks began to underthrust the arc c. 50 Ma ago. The arc shows an evolutionary history from the juvenile stages of an intra-oceanic island arc, through a thickened Andean-style volcanic arc accreted to a continental margin, to an arc underplated by older continental crust. Extrusive volcanic activity spanned the mid-Cretaceous to Oligocene. This paper presents new and detailed lithostratigraphic data relating to two volcanic groups. The mid-Cretaceous Chalt Volcanic Group (CVG) documents volcanism in the last stages of the island arc phase. The Eocene-Oligocene Shamran Volcanic Group (SVG) documents Andean margin to post-Himalayan collision volcanism. The CVG comprises two formations, formally defined here. The back-arc Hunza Formation is dominated by subaqueous back-arc effusive basalt, andesite and boninite volcanism with a brief phase of subaerial silicic volcanism. The intra-arc Ghizar Formation comprises basalt and andesite-dominated crystalline and volcaniclastic rocks produced by subaerial and subaqueous calc-alkaline arc stratovolcano and shield eruptions. Two facies are present: a basalt and andesite lava flow-dominated sequence and a volcaniclastic-dominated sequence with characteristics that indicate effusive-explosive volcanism and subsequent volcanic sediment reworking and deposition within both subaqueous and subaerial settings. A stratovolcanic centre in the Ishkoman Valley contains abundant proximal volcanic lithofacies suggestive of Strombolian–Vulcanian explosive eruptive activity. The SVG, which unconformably overlies deformed rocks of the CVG, crops out in relatively small, high-altitude outliers. Previous suggestions that it has a large outcrop area in western Kohistan are unfounded. The SVG is an undeformed sequence of reddened, dominantly silicic volcanic rocks comprising mainly andesitic to dacitic and rhyolitic lavas, parataxitic and eutaxitic welded silicic ignimbrites, poorly sorted volcaniclastic sandstones, conglomerates and tuffs, and well-sorted, very fine-grained vitric tuffs. The SVG records highly evolved explosive and effusive volcanism within a mature Andean continental margin to post-Himalayan collisional environment. Primary magmas were probably generated at c. 40–30 Ma wit
doi_str_mv 10.1016/S0377-0273(03)00287-7
format Article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_17284894</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0377027303002877</els_id><sourcerecordid>17284894</sourcerecordid><originalsourceid>FETCH-LOGICAL-a457t-6d04a60c361b38e2207f9d8273f83effd7c07c157cd750fa6caf1f5d48ed584f3</originalsourceid><addsrcrecordid>eNqFkdtqVTEQhhdiwW3rIwi5URS6dLJOyfamSPFEiwoebsPsHLpi1062mbSlT-RrmrVX1UshkDDzTX7--avqMYcXHPjw8gu0QtTQiPYZtM8BGilqca9acSmaeoC1uF-t_iIPqodEPwCAg4RV9et7nDSGSDlh9hcJd-Mti45h0ux63_Kakf15ZYO2xHxgebTsLI6eMoYZO2YfY8oj-4yX-9qrP3O0ZTc-j2XE04TBLPAG9WVdXvUGyYdjNjd8KOq1jiH7YEPGiWWrc1ykcyle0FF14HAi--juPqy-vX3z9fR9ff7p3YfT1-c1dr3I9WCgwwF0O_BNK23TgHBrI4tvJ1vrnBEahOa90Eb04HDQ6LjrTSet6WXn2sPq6fLvLsVimrLaetJ2KgZsvCLFRSM7ue4K2C-gTpEoWad2yW8x3SoOao5F7WNR884VlDPHokSZe3IngKRxcgmD9vRvuO-k5M26cCcLZ4vba2-TIu3nEIxPZTnKRP8fpd_tF6WV</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>17284894</pqid></control><display><type>article</type><title>Volcanostratigraphy of arc volcanic sequences in the Kohistan arc, North Pakistan: volcanism within island arc, back-arc-basin, and intra-continental tectonic settings</title><source>Elsevier ScienceDirect Journals Complete</source><creator>Petterson, Michael G. ; Treloar, Peter J.</creator><creatorcontrib>Petterson, Michael G. ; Treloar, Peter J.</creatorcontrib><description>The Kohistan arc was initiated, offshore of Asia, during the mid-Cretaceous above northward subducting, Tethyan oceanic crust. The arc sutured to Asia c. 90 Ma ago. Subduction of oceanic crust beneath the arc continued until Indian Plate continental rocks began to underthrust the arc c. 50 Ma ago. The arc shows an evolutionary history from the juvenile stages of an intra-oceanic island arc, through a thickened Andean-style volcanic arc accreted to a continental margin, to an arc underplated by older continental crust. Extrusive volcanic activity spanned the mid-Cretaceous to Oligocene. This paper presents new and detailed lithostratigraphic data relating to two volcanic groups. The mid-Cretaceous Chalt Volcanic Group (CVG) documents volcanism in the last stages of the island arc phase. The Eocene-Oligocene Shamran Volcanic Group (SVG) documents Andean margin to post-Himalayan collision volcanism. The CVG comprises two formations, formally defined here. The back-arc Hunza Formation is dominated by subaqueous back-arc effusive basalt, andesite and boninite volcanism with a brief phase of subaerial silicic volcanism. The intra-arc Ghizar Formation comprises basalt and andesite-dominated crystalline and volcaniclastic rocks produced by subaerial and subaqueous calc-alkaline arc stratovolcano and shield eruptions. Two facies are present: a basalt and andesite lava flow-dominated sequence and a volcaniclastic-dominated sequence with characteristics that indicate effusive-explosive volcanism and subsequent volcanic sediment reworking and deposition within both subaqueous and subaerial settings. A stratovolcanic centre in the Ishkoman Valley contains abundant proximal volcanic lithofacies suggestive of Strombolian–Vulcanian explosive eruptive activity. The SVG, which unconformably overlies deformed rocks of the CVG, crops out in relatively small, high-altitude outliers. Previous suggestions that it has a large outcrop area in western Kohistan are unfounded. The SVG is an undeformed sequence of reddened, dominantly silicic volcanic rocks comprising mainly andesitic to dacitic and rhyolitic lavas, parataxitic and eutaxitic welded silicic ignimbrites, poorly sorted volcaniclastic sandstones, conglomerates and tuffs, and well-sorted, very fine-grained vitric tuffs. The SVG records highly evolved explosive and effusive volcanism within a mature Andean continental margin to post-Himalayan collisional environment. Primary magmas were probably generated at c. 40–30 Ma within relict metasomatised Tethyan mantle wedged between the Kohistan arc above and the underplating Indian Plate below.</description><identifier>ISSN: 0377-0273</identifier><identifier>EISSN: 1872-6097</identifier><identifier>DOI: 10.1016/S0377-0273(03)00287-7</identifier><identifier>CODEN: JVGRDQ</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>back-arc basin ; boninites ; Crystalline rocks ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; explosive volcanism ; Igneous and metamorphic rocks petrology, volcanic processes, magmas ; Kohistan ; Marine ; Pakistan</subject><ispartof>Journal of volcanology and geothermal research, 2004-02, Vol.130 (1), p.147-178</ispartof><rights>2003 Elsevier B.V.</rights><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a457t-6d04a60c361b38e2207f9d8273f83effd7c07c157cd750fa6caf1f5d48ed584f3</citedby><cites>FETCH-LOGICAL-a457t-6d04a60c361b38e2207f9d8273f83effd7c07c157cd750fa6caf1f5d48ed584f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0377-0273(03)00287-7$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=15488129$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Petterson, Michael G.</creatorcontrib><creatorcontrib>Treloar, Peter J.</creatorcontrib><title>Volcanostratigraphy of arc volcanic sequences in the Kohistan arc, North Pakistan: volcanism within island arc, back-arc-basin, and intra-continental tectonic settings</title><title>Journal of volcanology and geothermal research</title><description>The Kohistan arc was initiated, offshore of Asia, during the mid-Cretaceous above northward subducting, Tethyan oceanic crust. The arc sutured to Asia c. 90 Ma ago. Subduction of oceanic crust beneath the arc continued until Indian Plate continental rocks began to underthrust the arc c. 50 Ma ago. The arc shows an evolutionary history from the juvenile stages of an intra-oceanic island arc, through a thickened Andean-style volcanic arc accreted to a continental margin, to an arc underplated by older continental crust. Extrusive volcanic activity spanned the mid-Cretaceous to Oligocene. This paper presents new and detailed lithostratigraphic data relating to two volcanic groups. The mid-Cretaceous Chalt Volcanic Group (CVG) documents volcanism in the last stages of the island arc phase. The Eocene-Oligocene Shamran Volcanic Group (SVG) documents Andean margin to post-Himalayan collision volcanism. The CVG comprises two formations, formally defined here. The back-arc Hunza Formation is dominated by subaqueous back-arc effusive basalt, andesite and boninite volcanism with a brief phase of subaerial silicic volcanism. The intra-arc Ghizar Formation comprises basalt and andesite-dominated crystalline and volcaniclastic rocks produced by subaerial and subaqueous calc-alkaline arc stratovolcano and shield eruptions. Two facies are present: a basalt and andesite lava flow-dominated sequence and a volcaniclastic-dominated sequence with characteristics that indicate effusive-explosive volcanism and subsequent volcanic sediment reworking and deposition within both subaqueous and subaerial settings. A stratovolcanic centre in the Ishkoman Valley contains abundant proximal volcanic lithofacies suggestive of Strombolian–Vulcanian explosive eruptive activity. The SVG, which unconformably overlies deformed rocks of the CVG, crops out in relatively small, high-altitude outliers. Previous suggestions that it has a large outcrop area in western Kohistan are unfounded. The SVG is an undeformed sequence of reddened, dominantly silicic volcanic rocks comprising mainly andesitic to dacitic and rhyolitic lavas, parataxitic and eutaxitic welded silicic ignimbrites, poorly sorted volcaniclastic sandstones, conglomerates and tuffs, and well-sorted, very fine-grained vitric tuffs. The SVG records highly evolved explosive and effusive volcanism within a mature Andean continental margin to post-Himalayan collisional environment. Primary magmas were probably generated at c. 40–30 Ma within relict metasomatised Tethyan mantle wedged between the Kohistan arc above and the underplating Indian Plate below.</description><subject>back-arc basin</subject><subject>boninites</subject><subject>Crystalline rocks</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>explosive volcanism</subject><subject>Igneous and metamorphic rocks petrology, volcanic processes, magmas</subject><subject>Kohistan</subject><subject>Marine</subject><subject>Pakistan</subject><issn>0377-0273</issn><issn>1872-6097</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqFkdtqVTEQhhdiwW3rIwi5URS6dLJOyfamSPFEiwoebsPsHLpi1062mbSlT-RrmrVX1UshkDDzTX7--avqMYcXHPjw8gu0QtTQiPYZtM8BGilqca9acSmaeoC1uF-t_iIPqodEPwCAg4RV9et7nDSGSDlh9hcJd-Mti45h0ux63_Kakf15ZYO2xHxgebTsLI6eMoYZO2YfY8oj-4yX-9qrP3O0ZTc-j2XE04TBLPAG9WVdXvUGyYdjNjd8KOq1jiH7YEPGiWWrc1ykcyle0FF14HAi--juPqy-vX3z9fR9ff7p3YfT1-c1dr3I9WCgwwF0O_BNK23TgHBrI4tvJ1vrnBEahOa90Eb04HDQ6LjrTSet6WXn2sPq6fLvLsVimrLaetJ2KgZsvCLFRSM7ue4K2C-gTpEoWad2yW8x3SoOao5F7WNR884VlDPHokSZe3IngKRxcgmD9vRvuO-k5M26cCcLZ4vba2-TIu3nEIxPZTnKRP8fpd_tF6WV</recordid><startdate>20040215</startdate><enddate>20040215</enddate><creator>Petterson, Michael G.</creator><creator>Treloar, Peter J.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>20040215</creationdate><title>Volcanostratigraphy of arc volcanic sequences in the Kohistan arc, North Pakistan: volcanism within island arc, back-arc-basin, and intra-continental tectonic settings</title><author>Petterson, Michael G. ; Treloar, Peter J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a457t-6d04a60c361b38e2207f9d8273f83effd7c07c157cd750fa6caf1f5d48ed584f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>back-arc basin</topic><topic>boninites</topic><topic>Crystalline rocks</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>explosive volcanism</topic><topic>Igneous and metamorphic rocks petrology, volcanic processes, magmas</topic><topic>Kohistan</topic><topic>Marine</topic><topic>Pakistan</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Petterson, Michael G.</creatorcontrib><creatorcontrib>Treloar, Peter J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><jtitle>Journal of volcanology and geothermal research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Petterson, Michael G.</au><au>Treloar, Peter J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Volcanostratigraphy of arc volcanic sequences in the Kohistan arc, North Pakistan: volcanism within island arc, back-arc-basin, and intra-continental tectonic settings</atitle><jtitle>Journal of volcanology and geothermal research</jtitle><date>2004-02-15</date><risdate>2004</risdate><volume>130</volume><issue>1</issue><spage>147</spage><epage>178</epage><pages>147-178</pages><issn>0377-0273</issn><eissn>1872-6097</eissn><coden>JVGRDQ</coden><abstract>The Kohistan arc was initiated, offshore of Asia, during the mid-Cretaceous above northward subducting, Tethyan oceanic crust. The arc sutured to Asia c. 90 Ma ago. Subduction of oceanic crust beneath the arc continued until Indian Plate continental rocks began to underthrust the arc c. 50 Ma ago. The arc shows an evolutionary history from the juvenile stages of an intra-oceanic island arc, through a thickened Andean-style volcanic arc accreted to a continental margin, to an arc underplated by older continental crust. Extrusive volcanic activity spanned the mid-Cretaceous to Oligocene. This paper presents new and detailed lithostratigraphic data relating to two volcanic groups. The mid-Cretaceous Chalt Volcanic Group (CVG) documents volcanism in the last stages of the island arc phase. The Eocene-Oligocene Shamran Volcanic Group (SVG) documents Andean margin to post-Himalayan collision volcanism. The CVG comprises two formations, formally defined here. The back-arc Hunza Formation is dominated by subaqueous back-arc effusive basalt, andesite and boninite volcanism with a brief phase of subaerial silicic volcanism. The intra-arc Ghizar Formation comprises basalt and andesite-dominated crystalline and volcaniclastic rocks produced by subaerial and subaqueous calc-alkaline arc stratovolcano and shield eruptions. Two facies are present: a basalt and andesite lava flow-dominated sequence and a volcaniclastic-dominated sequence with characteristics that indicate effusive-explosive volcanism and subsequent volcanic sediment reworking and deposition within both subaqueous and subaerial settings. A stratovolcanic centre in the Ishkoman Valley contains abundant proximal volcanic lithofacies suggestive of Strombolian–Vulcanian explosive eruptive activity. The SVG, which unconformably overlies deformed rocks of the CVG, crops out in relatively small, high-altitude outliers. Previous suggestions that it has a large outcrop area in western Kohistan are unfounded. The SVG is an undeformed sequence of reddened, dominantly silicic volcanic rocks comprising mainly andesitic to dacitic and rhyolitic lavas, parataxitic and eutaxitic welded silicic ignimbrites, poorly sorted volcaniclastic sandstones, conglomerates and tuffs, and well-sorted, very fine-grained vitric tuffs. The SVG records highly evolved explosive and effusive volcanism within a mature Andean continental margin to post-Himalayan collisional environment. Primary magmas were probably generated at c. 40–30 Ma within relict metasomatised Tethyan mantle wedged between the Kohistan arc above and the underplating Indian Plate below.</abstract><cop>Lausanne</cop><cop>Amsterdam</cop><cop>New York, NY</cop><pub>Elsevier B.V</pub><doi>10.1016/S0377-0273(03)00287-7</doi><tpages>32</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0377-0273
ispartof Journal of volcanology and geothermal research, 2004-02, Vol.130 (1), p.147-178
issn 0377-0273
1872-6097
language eng
recordid cdi_proquest_miscellaneous_17284894
source Elsevier ScienceDirect Journals Complete
subjects back-arc basin
boninites
Crystalline rocks
Earth sciences
Earth, ocean, space
Exact sciences and technology
explosive volcanism
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Kohistan
Marine
Pakistan
title Volcanostratigraphy of arc volcanic sequences in the Kohistan arc, North Pakistan: volcanism within island arc, back-arc-basin, and intra-continental tectonic settings
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-24T11%3A27%3A50IST&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=Volcanostratigraphy%20of%20arc%20volcanic%20sequences%20in%20the%20Kohistan%20arc,%20North%20Pakistan:%20volcanism%20within%20island%20arc,%20back-arc-basin,%20and%20intra-continental%20tectonic%20settings&rft.jtitle=Journal%20of%20volcanology%20and%20geothermal%20research&rft.au=Petterson,%20Michael%20G.&rft.date=2004-02-15&rft.volume=130&rft.issue=1&rft.spage=147&rft.epage=178&rft.pages=147-178&rft.issn=0377-0273&rft.eissn=1872-6097&rft.coden=JVGRDQ&rft_id=info:doi/10.1016/S0377-0273(03)00287-7&rft_dat=%3Cproquest_cross%3E17284894%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=17284894&rft_id=info:pmid/&rft_els_id=S0377027303002877&rfr_iscdi=true