Xiaohui JIA, Xiaodi WANG, Xiaofei QIU, Wenqiang YANG
{"title":"广仙造山带的岩石成因及其构造意义:粤北早古生代过铝质和铝质花岗岩类地球化学和Sr-Nd-Hf同位素组成的制约","authors":"Xiaohui JIA, Xiaodi WANG, Xiaofei QIU, Wenqiang YANG","doi":"10.1111/1755-6724.15296","DOIUrl":null,"url":null,"abstract":"<p>This study presents whole-rock major, trace elements and Sr-Nd-Hf isotopic compositions, as well as zircon U-Pb geochronological data, for the peraluminous and aluminous granitoids in northern Guangdong Province, South China, in order to investigate their petrogenesis and tectonic implications. The Qingzhou granodiorites (458.5–455.4 Ma) are peraluminous (A/CNK = 1.05–1.96). They have relatively high initial <sup>87</sup>Sr/<sup>86</sup>Sr ratios (<i>I</i><sub>Sr</sub> = 0.7087–0.7148), low <i>ε</i><sub>Nd</sub>(<i>t</i>) values (–11.2 to –10.1) and a variety of zircon <i>ε</i><sub>Hf</sub>(<i>t</i>) values in the range –13.4 to +4.81. By contrast, the Damaoshan granodiorites (458.1 Ma) are metaluminous (A/CNK = 0.79–0.94) in composition, with <i>I</i><sub>Sr</sub> values of 0.7083 to 0.7110, <i>ε</i><sub>Nd</sub>(<i>t</i>) values of –7.92 to –5.28 and zircon <i>ε</i><sub>Hf</sub>(<i>t</i>) values of –8.69 to –2.06. The Gaoshou quartz diorites (449 Ma) are metaluminous-peraluminous. Their <i>I</i><sub>Sr</sub> values vary from 0.7104 to 0.7111 with <i>ε</i><sub>Nd</sub>(<i>t</i>) values from –9.64 to –8.63. Geochemical data and Sr-Nd-Hf isotope compositions indicate that the Qingzhou, Damaoshan and Gaoshou intrusions are primarily derived from the partial melting of metagreywackes, tonalitic rocks and amphibolite, respectively. The crustal materials in northern Guangdong, from top to bottom, consist of Paleozoic sequences, metasediments with a <i>V</i><sub>p</sub> of <i><</i> 6.0 km/s, metaigneous rocks with a <i>V</i><sub>p</sub> of 6.3–6.7 km/s and amphibolite with a <i>V</i><sub>p</sub> of ∼7.03 km/s.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"99 3","pages":"707-724"},"PeriodicalIF":3.7000,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Petrogenesis and Tectonic Implications of the Kwangsian Orogen: Constraints from Geochemistry and Sr-Nd-Hf Isotopic Compositions of the Early Paleozoic Peraluminous and Aluminous Granitoids in Northern Guangdong, SE China\",\"authors\":\"Xiaohui JIA, Xiaodi WANG, Xiaofei QIU, Wenqiang YANG\",\"doi\":\"10.1111/1755-6724.15296\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>This study presents whole-rock major, trace elements and Sr-Nd-Hf isotopic compositions, as well as zircon U-Pb geochronological data, for the peraluminous and aluminous granitoids in northern Guangdong Province, South China, in order to investigate their petrogenesis and tectonic implications. The Qingzhou granodiorites (458.5–455.4 Ma) are peraluminous (A/CNK = 1.05–1.96). They have relatively high initial <sup>87</sup>Sr/<sup>86</sup>Sr ratios (<i>I</i><sub>Sr</sub> = 0.7087–0.7148), low <i>ε</i><sub>Nd</sub>(<i>t</i>) values (–11.2 to –10.1) and a variety of zircon <i>ε</i><sub>Hf</sub>(<i>t</i>) values in the range –13.4 to +4.81. By contrast, the Damaoshan granodiorites (458.1 Ma) are metaluminous (A/CNK = 0.79–0.94) in composition, with <i>I</i><sub>Sr</sub> values of 0.7083 to 0.7110, <i>ε</i><sub>Nd</sub>(<i>t</i>) values of –7.92 to –5.28 and zircon <i>ε</i><sub>Hf</sub>(<i>t</i>) values of –8.69 to –2.06. The Gaoshou quartz diorites (449 Ma) are metaluminous-peraluminous. Their <i>I</i><sub>Sr</sub> values vary from 0.7104 to 0.7111 with <i>ε</i><sub>Nd</sub>(<i>t</i>) values from –9.64 to –8.63. Geochemical data and Sr-Nd-Hf isotope compositions indicate that the Qingzhou, Damaoshan and Gaoshou intrusions are primarily derived from the partial melting of metagreywackes, tonalitic rocks and amphibolite, respectively. The crustal materials in northern Guangdong, from top to bottom, consist of Paleozoic sequences, metasediments with a <i>V</i><sub>p</sub> of <i><</i> 6.0 km/s, metaigneous rocks with a <i>V</i><sub>p</sub> of 6.3–6.7 km/s and amphibolite with a <i>V</i><sub>p</sub> of ∼7.03 km/s.</p>\",\"PeriodicalId\":7095,\"journal\":{\"name\":\"Acta Geologica Sinica ‐ English Edition\",\"volume\":\"99 3\",\"pages\":\"707-724\"},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2025-06-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Geologica Sinica ‐ English Edition\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/1755-6724.15296\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geologica Sinica ‐ English Edition","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/1755-6724.15296","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Petrogenesis and Tectonic Implications of the Kwangsian Orogen: Constraints from Geochemistry and Sr-Nd-Hf Isotopic Compositions of the Early Paleozoic Peraluminous and Aluminous Granitoids in Northern Guangdong, SE China
This study presents whole-rock major, trace elements and Sr-Nd-Hf isotopic compositions, as well as zircon U-Pb geochronological data, for the peraluminous and aluminous granitoids in northern Guangdong Province, South China, in order to investigate their petrogenesis and tectonic implications. The Qingzhou granodiorites (458.5–455.4 Ma) are peraluminous (A/CNK = 1.05–1.96). They have relatively high initial 87Sr/86Sr ratios (ISr = 0.7087–0.7148), low εNd(t) values (–11.2 to –10.1) and a variety of zircon εHf(t) values in the range –13.4 to +4.81. By contrast, the Damaoshan granodiorites (458.1 Ma) are metaluminous (A/CNK = 0.79–0.94) in composition, with ISr values of 0.7083 to 0.7110, εNd(t) values of –7.92 to –5.28 and zircon εHf(t) values of –8.69 to –2.06. The Gaoshou quartz diorites (449 Ma) are metaluminous-peraluminous. Their ISr values vary from 0.7104 to 0.7111 with εNd(t) values from –9.64 to –8.63. Geochemical data and Sr-Nd-Hf isotope compositions indicate that the Qingzhou, Damaoshan and Gaoshou intrusions are primarily derived from the partial melting of metagreywackes, tonalitic rocks and amphibolite, respectively. The crustal materials in northern Guangdong, from top to bottom, consist of Paleozoic sequences, metasediments with a Vp of < 6.0 km/s, metaigneous rocks with a Vp of 6.3–6.7 km/s and amphibolite with a Vp of ∼7.03 km/s.
期刊介绍:
Acta Geologica Sinica mainly reports the latest and most important achievements in the theoretical and basic research in geological sciences, together with new technologies, in China. Papers published involve various aspects of research concerning geosciences and related disciplines, such as stratigraphy, palaeontology, origin and history of the Earth, structural geology, tectonics, mineralogy, petrology, geochemistry, geophysics, geology of mineral deposits, hydrogeology, engineering geology, environmental geology, regional geology and new theories and technologies of geological exploration.