Petrogenesis of an Early Permian bimodal intermediate‐felsic suite in the East Junggar in Central Asian Orogenic Belt and tectonic implications
The bimodal intermediate‐felsic suites are rare, and their petrogenesis remains unsolved. Here, we report a bimodal intermediate‐felsic magmatic suite from East Junggar (NW China) composed of rhyolites, basaltic andesites, and andesites. The basaltic andesites and andesites are porphyritic with phen...
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| description | The bimodal intermediate‐felsic suites are rare, and their petrogenesis remains unsolved. Here, we report a bimodal intermediate‐felsic magmatic suite from East Junggar (NW China) composed of rhyolites, basaltic andesites, and andesites. The basaltic andesites and andesites are porphyritic with phenocrysts predominantly of plagioclase. The rhyolites are porphyritic with phenocrysts of alkali‐feldspar, quartz, and minor plagioclase. LA–ICP–MS zircon U–Pb dating yielded an age of 284 ± 2 Ma for rhyolites. The basaltic andesites and andesites show SiO2 ranging from 54.67 to 58.26 wt%, and exhibit moderate TiO2 (1.45–1.77 wt%), and K2O (1.59–2.07 wt%) with low MgO (1.51–2.25 wt%). They display enrichment in HFSE and LILE together with negative Th, Nb, Ta, Ti anomalies, and exhibit low 87Sr/86Sr(t) ratios (0.7040–0.7046), high positive εNd(t) values (+5.82 to +6.16) and young TDM ages (75 wt%), negative Nb, Ta anomalies and significant depletion in Ba, Eu, Sr, Ti, and P. They also show high εNd(t) values (+5.51 to +7.08) and young TDM ages ( |
| doi_str_mv | 10.1002/gj.3983 |
| format | Article |
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A bimodal intermediate‐felsic magmatic suite is recognized in the East Junggar. The andesites are derived from partial melting of underplated basaltic rocks, and the rhyolites are generated by crystal fractionation of intermediate magmas, which provides new evidence for the crustal reworking process in East Junggar during Early Permian.</description><identifier>ISSN: 0072-1050</identifier><identifier>EISSN: 1099-1034</identifier><identifier>DOI: 10.1002/gj.3983</identifier><language>eng</language><publisher>Hoboken, USA: John Wiley & Sons, Inc</publisher><subject>Anomalies ; Apatite ; bimodal suite ; CAOB ; crustal reworking ; Crystallization ; Depletion ; East Junggar ; Feldspars ; Fractional crystallization ; Isotopes ; Junggar Ocean ; Lava ; Melting ; Niobium ; Orogeny ; Permian ; Petrogenesis ; Plagioclase ; Radiometric dating ; Rhyolites ; Rock ; Rocks ; Silica ; Silicon dioxide ; Strontium 87 ; Strontium isotopes ; Tantalum ; Tectonics ; Titanium dioxide ; Titanium oxide ; Titanium oxides ; Trace elements ; Zircon</subject><ispartof>Geological journal (Chichester, England), 2021-01, Vol.56 (1), p.547-571</ispartof><rights>2020 John Wiley & Sons Ltd</rights><rights>2021 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a3123-2d7bc9cc5fd962f8ed4e535e2151713fb71227b21f28cb9895c331f45ca8944e3</citedby><cites>FETCH-LOGICAL-a3123-2d7bc9cc5fd962f8ed4e535e2151713fb71227b21f28cb9895c331f45ca8944e3</cites><orcidid>0000-0002-5798-3285 ; 0000-0002-1073-8477</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fgj.3983$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fgj.3983$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Bo, Hongze</creatorcontrib><creatorcontrib>Zhang, Zhaochong</creatorcontrib><creatorcontrib>Santosh, M.</creatorcontrib><creatorcontrib>Cheng, Zhiguo</creatorcontrib><creatorcontrib>Xie, Qiuhong</creatorcontrib><creatorcontrib>Kong, Weiliang</creatorcontrib><creatorcontrib>Liu, Bingxiang</creatorcontrib><creatorcontrib>Qin, Jingyi</creatorcontrib><creatorcontrib>Li, Botong</creatorcontrib><title>Petrogenesis of an Early Permian bimodal intermediate‐felsic suite in the East Junggar in Central Asian Orogenic Belt and tectonic implications</title><title>Geological journal (Chichester, England)</title><description>The bimodal intermediate‐felsic suites are rare, and their petrogenesis remains unsolved. Here, we report a bimodal intermediate‐felsic magmatic suite from East Junggar (NW China) composed of rhyolites, basaltic andesites, and andesites. The basaltic andesites and andesites are porphyritic with phenocrysts predominantly of plagioclase. The rhyolites are porphyritic with phenocrysts of alkali‐feldspar, quartz, and minor plagioclase. LA–ICP–MS zircon U–Pb dating yielded an age of 284 ± 2 Ma for rhyolites. The basaltic andesites and andesites show SiO2 ranging from 54.67 to 58.26 wt%, and exhibit moderate TiO2 (1.45–1.77 wt%), and K2O (1.59–2.07 wt%) with low MgO (1.51–2.25 wt%). They display enrichment in HFSE and LILE together with negative Th, Nb, Ta, Ti anomalies, and exhibit low 87Sr/86Sr(t) ratios (0.7040–0.7046), high positive εNd(t) values (+5.82 to +6.16) and young TDM ages (<0.6 Ga). The rhyolites exhibit highSiO2(>75 wt%), negative Nb, Ta anomalies and significant depletion in Ba, Eu, Sr, Ti, and P. They also show high εNd(t) values (+5.51 to +7.08) and young TDM ages (<0.6 Ga), which are close to those of the intermediate rocks. Except for elements dominantly controlled by fractional crystallization, the other trace elements of the bimodal suite display similar patterns. Based on these characteristics, the MELTS simulation further suggests that the felsic rocks were possibly evolved from the intermediate magmas through fractional crystallization of feldspar, clinopyroxene, iron‐titanium oxide, and apatite. In contrast, the magmas parental to basaltic andesites were derived from the remelting of basaltic rocks underplated beneath the lower crust. The petrogenesis of this bimodal suite also provides new insights into Permian crustal reworking in the East Junggar, and suggest that the Junggar Ocean was closed prior to the Early Permian.
A bimodal intermediate‐felsic magmatic suite is recognized in the East Junggar. The andesites are derived from partial melting of underplated basaltic rocks, and the rhyolites are generated by crystal fractionation of intermediate magmas, which provides new evidence for the crustal reworking process in East Junggar during Early Permian.</description><subject>Anomalies</subject><subject>Apatite</subject><subject>bimodal suite</subject><subject>CAOB</subject><subject>crustal reworking</subject><subject>Crystallization</subject><subject>Depletion</subject><subject>East Junggar</subject><subject>Feldspars</subject><subject>Fractional crystallization</subject><subject>Isotopes</subject><subject>Junggar Ocean</subject><subject>Lava</subject><subject>Melting</subject><subject>Niobium</subject><subject>Orogeny</subject><subject>Permian</subject><subject>Petrogenesis</subject><subject>Plagioclase</subject><subject>Radiometric dating</subject><subject>Rhyolites</subject><subject>Rock</subject><subject>Rocks</subject><subject>Silica</subject><subject>Silicon dioxide</subject><subject>Strontium 87</subject><subject>Strontium isotopes</subject><subject>Tantalum</subject><subject>Tectonics</subject><subject>Titanium dioxide</subject><subject>Titanium oxide</subject><subject>Titanium oxides</subject><subject>Trace elements</subject><subject>Zircon</subject><issn>0072-1050</issn><issn>1099-1034</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1kE1OwzAQhS0EEqUgrmCJBQuU4p-kSZalKoWqUruAdeQ44-AoP8V2hLrjCHBFToLTsmU1M2--N08ahK4pmVBC2H1ZTXia8BM0oiRNA0p4eIpGhMTM9xE5RxfWVoRQSkI6Qt9bcKYroQWrLe4UFi1eCFPv8RZMo_2U66YrRI1167wChRYOfj6_FNRWS2x77cDvsHsDb7QOr_q2LIUZtDm0znjrzA6HNocc73mA2vmcAjuQrhsU3exqLYXTXWsv0ZkStYWrvzpGr4-Ll_lTsN4sn-ezdSA4ZTxgRZzLVMpIFemUqQSKECIeAaMRjSlXeUwZi3NGFUtkniZpJDmnKoykSNIwBD5GN8e7O9O992BdVnW9aX1kxsJ4GvOIJqGnbo-UNJ21BlS2M7oRZp9Rkg3_zsoqG_7tybsj-aFr2P-HZcvVgf4FcpaCfA</recordid><startdate>202101</startdate><enddate>202101</enddate><creator>Bo, Hongze</creator><creator>Zhang, Zhaochong</creator><creator>Santosh, M.</creator><creator>Cheng, Zhiguo</creator><creator>Xie, Qiuhong</creator><creator>Kong, Weiliang</creator><creator>Liu, Bingxiang</creator><creator>Qin, Jingyi</creator><creator>Li, Botong</creator><general>John Wiley & Sons, Inc</general><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-5798-3285</orcidid><orcidid>https://orcid.org/0000-0002-1073-8477</orcidid></search><sort><creationdate>202101</creationdate><title>Petrogenesis of an Early Permian bimodal intermediate‐felsic suite in the East Junggar in Central Asian Orogenic Belt and tectonic implications</title><author>Bo, Hongze ; Zhang, Zhaochong ; Santosh, M. ; Cheng, Zhiguo ; Xie, Qiuhong ; Kong, Weiliang ; Liu, Bingxiang ; Qin, Jingyi ; Li, Botong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a3123-2d7bc9cc5fd962f8ed4e535e2151713fb71227b21f28cb9895c331f45ca8944e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Anomalies</topic><topic>Apatite</topic><topic>bimodal suite</topic><topic>CAOB</topic><topic>crustal reworking</topic><topic>Crystallization</topic><topic>Depletion</topic><topic>East Junggar</topic><topic>Feldspars</topic><topic>Fractional crystallization</topic><topic>Isotopes</topic><topic>Junggar Ocean</topic><topic>Lava</topic><topic>Melting</topic><topic>Niobium</topic><topic>Orogeny</topic><topic>Permian</topic><topic>Petrogenesis</topic><topic>Plagioclase</topic><topic>Radiometric dating</topic><topic>Rhyolites</topic><topic>Rock</topic><topic>Rocks</topic><topic>Silica</topic><topic>Silicon dioxide</topic><topic>Strontium 87</topic><topic>Strontium isotopes</topic><topic>Tantalum</topic><topic>Tectonics</topic><topic>Titanium dioxide</topic><topic>Titanium oxide</topic><topic>Titanium oxides</topic><topic>Trace elements</topic><topic>Zircon</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bo, Hongze</creatorcontrib><creatorcontrib>Zhang, Zhaochong</creatorcontrib><creatorcontrib>Santosh, M.</creatorcontrib><creatorcontrib>Cheng, Zhiguo</creatorcontrib><creatorcontrib>Xie, Qiuhong</creatorcontrib><creatorcontrib>Kong, Weiliang</creatorcontrib><creatorcontrib>Liu, Bingxiang</creatorcontrib><creatorcontrib>Qin, Jingyi</creatorcontrib><creatorcontrib>Li, Botong</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Environment Abstracts</collection><jtitle>Geological journal (Chichester, England)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bo, Hongze</au><au>Zhang, Zhaochong</au><au>Santosh, M.</au><au>Cheng, Zhiguo</au><au>Xie, Qiuhong</au><au>Kong, Weiliang</au><au>Liu, Bingxiang</au><au>Qin, Jingyi</au><au>Li, Botong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Petrogenesis of an Early Permian bimodal intermediate‐felsic suite in the East Junggar in Central Asian Orogenic Belt and tectonic implications</atitle><jtitle>Geological journal (Chichester, England)</jtitle><date>2021-01</date><risdate>2021</risdate><volume>56</volume><issue>1</issue><spage>547</spage><epage>571</epage><pages>547-571</pages><issn>0072-1050</issn><eissn>1099-1034</eissn><abstract>The bimodal intermediate‐felsic suites are rare, and their petrogenesis remains unsolved. Here, we report a bimodal intermediate‐felsic magmatic suite from East Junggar (NW China) composed of rhyolites, basaltic andesites, and andesites. The basaltic andesites and andesites are porphyritic with phenocrysts predominantly of plagioclase. The rhyolites are porphyritic with phenocrysts of alkali‐feldspar, quartz, and minor plagioclase. LA–ICP–MS zircon U–Pb dating yielded an age of 284 ± 2 Ma for rhyolites. The basaltic andesites and andesites show SiO2 ranging from 54.67 to 58.26 wt%, and exhibit moderate TiO2 (1.45–1.77 wt%), and K2O (1.59–2.07 wt%) with low MgO (1.51–2.25 wt%). They display enrichment in HFSE and LILE together with negative Th, Nb, Ta, Ti anomalies, and exhibit low 87Sr/86Sr(t) ratios (0.7040–0.7046), high positive εNd(t) values (+5.82 to +6.16) and young TDM ages (<0.6 Ga). The rhyolites exhibit highSiO2(>75 wt%), negative Nb, Ta anomalies and significant depletion in Ba, Eu, Sr, Ti, and P. They also show high εNd(t) values (+5.51 to +7.08) and young TDM ages (<0.6 Ga), which are close to those of the intermediate rocks. Except for elements dominantly controlled by fractional crystallization, the other trace elements of the bimodal suite display similar patterns. Based on these characteristics, the MELTS simulation further suggests that the felsic rocks were possibly evolved from the intermediate magmas through fractional crystallization of feldspar, clinopyroxene, iron‐titanium oxide, and apatite. In contrast, the magmas parental to basaltic andesites were derived from the remelting of basaltic rocks underplated beneath the lower crust. The petrogenesis of this bimodal suite also provides new insights into Permian crustal reworking in the East Junggar, and suggest that the Junggar Ocean was closed prior to the Early Permian.
A bimodal intermediate‐felsic magmatic suite is recognized in the East Junggar. The andesites are derived from partial melting of underplated basaltic rocks, and the rhyolites are generated by crystal fractionation of intermediate magmas, which provides new evidence for the crustal reworking process in East Junggar during Early Permian.</abstract><cop>Hoboken, USA</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/gj.3983</doi><tpages>25</tpages><orcidid>https://orcid.org/0000-0002-5798-3285</orcidid><orcidid>https://orcid.org/0000-0002-1073-8477</orcidid></addata></record> |
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| subjects | Anomalies Apatite bimodal suite CAOB crustal reworking Crystallization Depletion East Junggar Feldspars Fractional crystallization Isotopes Junggar Ocean Lava Melting Niobium Orogeny Permian Petrogenesis Plagioclase Radiometric dating Rhyolites Rock Rocks Silica Silicon dioxide Strontium 87 Strontium isotopes Tantalum Tectonics Titanium dioxide Titanium oxide Titanium oxides Trace elements Zircon |
| title | Petrogenesis of an Early Permian bimodal intermediate‐felsic suite in the East Junggar in Central Asian Orogenic Belt and tectonic implications |
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