大陆基底的偶发性再加工形成的大型花岗岩浴岩

IF 3.2 2区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY Precambrian Research Pub Date : 2024-09-23 DOI:10.1016/j.precamres.2024.107568
Qi-Wei Li , Jun-Hong Zhao , Yun-Lai Dong , Yu-Qing Huang
{"title":"大陆基底的偶发性再加工形成的大型花岗岩浴岩","authors":"Qi-Wei Li ,&nbsp;Jun-Hong Zhao ,&nbsp;Yun-Lai Dong ,&nbsp;Yu-Qing Huang","doi":"10.1016/j.precamres.2024.107568","DOIUrl":null,"url":null,"abstract":"<div><div>Large granitoid batholiths contain key information about the formation and evolution of the continental crust, but their growth mechanism and compositional diversity are still not clear. The Neoproterozoic Huangling batholith, one of the largest granitoid batholith in South China, comprises several plutons and covers an area of ∼ 970 km<sup>2</sup>. The largest trondhjemitic pluton was emplaced at ca. 840 Ma, and its magmatic zircons show large variable Th/U ratios (0.22–1.81) that are strongly correlated with Ti-in-zircon temperatures, zircon U/Yb and Ce<sup>4+</sup>/Ce<sup>3+</sup> ratios. These zircons have negative εHf (−28.3 to −14.6), variable δ<sup>18</sup>O (4.43–6.99 ‰) and δ<sup>94</sup>Zr values (−0.38 ‰ to + 0.21 ‰), as well as moderate zircon saturation temperatures (716–771 °C) and high <em>f</em>O<sub>2</sub> (FMQ+1.9). The trondhjemite is therefore proposed to have been derived from the Archean amphibolitic crust and underwent fractional crystallization of zircon, magnetite, apatite and/or titanite. In comparison, one smaller granitic pluton was emplaced at 831 ± 5 Ma. The magmatic zircons have more radiogenic εHf (−11.7 to −10.4), constant δ<sup>18</sup>O (6.09–6.66 ‰) and δ<sup>94</sup>Zr values (−0.31 ‰ to + 0.06 ‰), and they have slightly higher zircon saturation temperatures (767–803 °C) and <em>f</em>O<sub>2</sub> (FMQ+2.9). These geochemical features suggest that the granite was derived from a crustal source with mixed juvenile mafic materials and Archean amphibolitic rocks, and did not experience significant fractional crystallization. The Huangling granitoid batholith was formed by multiple injections of felsic melts with the compositional diversity that probably resulted from heterogeneous protoliths and complex magmatic processes in a prolonged magma evolution system.</div></div>","PeriodicalId":49674,"journal":{"name":"Precambrian Research","volume":null,"pages":null},"PeriodicalIF":3.2000,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Large granitoid batholith formed by episodic reworking of the continental basement\",\"authors\":\"Qi-Wei Li ,&nbsp;Jun-Hong Zhao ,&nbsp;Yun-Lai Dong ,&nbsp;Yu-Qing Huang\",\"doi\":\"10.1016/j.precamres.2024.107568\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Large granitoid batholiths contain key information about the formation and evolution of the continental crust, but their growth mechanism and compositional diversity are still not clear. The Neoproterozoic Huangling batholith, one of the largest granitoid batholith in South China, comprises several plutons and covers an area of ∼ 970 km<sup>2</sup>. The largest trondhjemitic pluton was emplaced at ca. 840 Ma, and its magmatic zircons show large variable Th/U ratios (0.22–1.81) that are strongly correlated with Ti-in-zircon temperatures, zircon U/Yb and Ce<sup>4+</sup>/Ce<sup>3+</sup> ratios. These zircons have negative εHf (−28.3 to −14.6), variable δ<sup>18</sup>O (4.43–6.99 ‰) and δ<sup>94</sup>Zr values (−0.38 ‰ to + 0.21 ‰), as well as moderate zircon saturation temperatures (716–771 °C) and high <em>f</em>O<sub>2</sub> (FMQ+1.9). The trondhjemite is therefore proposed to have been derived from the Archean amphibolitic crust and underwent fractional crystallization of zircon, magnetite, apatite and/or titanite. In comparison, one smaller granitic pluton was emplaced at 831 ± 5 Ma. The magmatic zircons have more radiogenic εHf (−11.7 to −10.4), constant δ<sup>18</sup>O (6.09–6.66 ‰) and δ<sup>94</sup>Zr values (−0.31 ‰ to + 0.06 ‰), and they have slightly higher zircon saturation temperatures (767–803 °C) and <em>f</em>O<sub>2</sub> (FMQ+2.9). These geochemical features suggest that the granite was derived from a crustal source with mixed juvenile mafic materials and Archean amphibolitic rocks, and did not experience significant fractional crystallization. The Huangling granitoid batholith was formed by multiple injections of felsic melts with the compositional diversity that probably resulted from heterogeneous protoliths and complex magmatic processes in a prolonged magma evolution system.</div></div>\",\"PeriodicalId\":49674,\"journal\":{\"name\":\"Precambrian Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2024-09-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Precambrian Research\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S030192682400281X\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Precambrian Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S030192682400281X","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

大型花岗岩浴成岩蕴含着大陆地壳形成和演化的关键信息,但其生长机制和成分多样性仍不清楚。新近新生代黄岭浴成岩是华南地区最大的花岗岩浴成岩之一,由多个岩体组成,面积达 970 平方千米。其中最大的三棱杰米特质岩体形成于约 840 Ma。其岩浆锆石显示出较大的Th/U比值变化(0.22-1.81),与锆石中的Ti-温度、锆石U/Yb和Ce4+/Ce3+比值密切相关。这些锆石具有负εHf(-28.3 至 -14.6)、可变δ18O(4.43-6.99 ‰)和δ94Zr 值(-0.38 ‰ 至 + 0.21 ‰),以及中等锆石饱和温度(716-771 ℃)和高 fO2(FMQ+1.9)。因此,推测三棱辉石来源于阿契安闪长岩地壳,并经历了锆石、磁铁矿、磷灰石和/或榍石的分块结晶。相比之下,一个较小的花岗岩岩体是在 831 ± 5 Ma 时形成的。岩浆锆石具有更高的放射性εHf(-11.7 至 -10.4)、恒定的δ18O(6.09-6.66 ‰)和δ94Zr 值(-0.31 ‰ 至 + 0.06 ‰),它们的锆石饱和温度(767-803 °C)和 fO2(FMQ+2.9)也略高。这些地球化学特征表明,该花岗岩来源于地壳中的混合幼年黑云母物质和奥陶系闪长岩,并没有经历明显的分块结晶。黄陵花岗岩岩体是由长英熔融体多次注入形成的,其成分多样性可能是在一个漫长的岩浆演化系统中由异质原岩和复杂岩浆过程形成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Large granitoid batholith formed by episodic reworking of the continental basement
Large granitoid batholiths contain key information about the formation and evolution of the continental crust, but their growth mechanism and compositional diversity are still not clear. The Neoproterozoic Huangling batholith, one of the largest granitoid batholith in South China, comprises several plutons and covers an area of ∼ 970 km2. The largest trondhjemitic pluton was emplaced at ca. 840 Ma, and its magmatic zircons show large variable Th/U ratios (0.22–1.81) that are strongly correlated with Ti-in-zircon temperatures, zircon U/Yb and Ce4+/Ce3+ ratios. These zircons have negative εHf (−28.3 to −14.6), variable δ18O (4.43–6.99 ‰) and δ94Zr values (−0.38 ‰ to + 0.21 ‰), as well as moderate zircon saturation temperatures (716–771 °C) and high fO2 (FMQ+1.9). The trondhjemite is therefore proposed to have been derived from the Archean amphibolitic crust and underwent fractional crystallization of zircon, magnetite, apatite and/or titanite. In comparison, one smaller granitic pluton was emplaced at 831 ± 5 Ma. The magmatic zircons have more radiogenic εHf (−11.7 to −10.4), constant δ18O (6.09–6.66 ‰) and δ94Zr values (−0.31 ‰ to + 0.06 ‰), and they have slightly higher zircon saturation temperatures (767–803 °C) and fO2 (FMQ+2.9). These geochemical features suggest that the granite was derived from a crustal source with mixed juvenile mafic materials and Archean amphibolitic rocks, and did not experience significant fractional crystallization. The Huangling granitoid batholith was formed by multiple injections of felsic melts with the compositional diversity that probably resulted from heterogeneous protoliths and complex magmatic processes in a prolonged magma evolution system.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Precambrian Research
Precambrian Research 地学-地球科学综合
CiteScore
7.20
自引率
28.90%
发文量
325
审稿时长
12 months
期刊介绍: Precambrian Research publishes studies on all aspects of the early stages of the composition, structure and evolution of the Earth and its planetary neighbours. With a focus on process-oriented and comparative studies, it covers, but is not restricted to, subjects such as: (1) Chemical, biological, biochemical and cosmochemical evolution; the origin of life; the evolution of the oceans and atmosphere; the early fossil record; palaeobiology; (2) Geochronology and isotope and elemental geochemistry; (3) Precambrian mineral deposits; (4) Geophysical aspects of the early Earth and Precambrian terrains; (5) Nature, formation and evolution of the Precambrian lithosphere and mantle including magmatic, depositional, metamorphic and tectonic processes. In addition, the editors particularly welcome integrated process-oriented studies that involve a combination of the above fields and comparative studies that demonstrate the effect of Precambrian evolution on Phanerozoic earth system processes. Regional and localised studies of Precambrian phenomena are considered appropriate only when the detail and quality allow illustration of a wider process, or when significant gaps in basic knowledge of a particular area can be filled.
期刊最新文献
Paleoproterozoic ultrahigh-temperature metamorphism and anatexis of the pelitic granulites in the Kongling terrane, South China Decoding Calymmian juvenile mafic magmatism in the Ribeira Belt, Brazil: Evidence for a long-lived arc system along the margin of Columbia Detrital zircon geochronology and whole-rock geochemistry of the 1.8–1.7 Ga Xiong’er volcanic-sedimentary succession in the southern North China craton and their implications for basin evolution Syn-rift volcanism (ca. 670 Ma) in the lower Windermere Supergroup, southern Canadian Cordillera: New constraints on the syn- to post-rift transition for northwestern Laurentia Paleoproterozoic amphibolite to ultrahigh temperature granulite facies metamorphism of the Rangnim massif in the Northern Korean Peninsula and tectonic implications
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1