与北巴塔哥尼亚安第斯山脉边缘盆地开合有关的晚古生代岩浆活动和前陆变形

IF 2.6 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY Journal of the Geological Society Pub Date : 2024-01-04 DOI:10.1144/jgs2023-171
C. Rapela, M. García, F. Hervé, R. Pankhurst, M. Calderon, C. Fanning, S. Verdecchia
{"title":"与北巴塔哥尼亚安第斯山脉边缘盆地开合有关的晚古生代岩浆活动和前陆变形","authors":"C. Rapela, M. García, F. Hervé, R. Pankhurst, M. Calderon, C. Fanning, S. Verdecchia","doi":"10.1144/jgs2023-171","DOIUrl":null,"url":null,"abstract":"\n Remnants of coeval Devonian oceanic and continental foreland rocks are preserved in the basement of the North Patagonian Andes. Our previous studies of igneous rocks have shown the primitive oceanic and continental igneous rocks are coeval, and belong to a marginal basin that opened and closed over 50 Myr. A structural study and four new U-Pb SHRIMP ages and zircon Hf-O determinations allow identification of three metamorphic episodes, the first one M\n 1\n (D\n 1\n -S\n 1\n ) coeval with Andean type granite intrusion in the foreland (405–380 Ma). This activity was simultaneous with development of an oceanic ridge and a marginal basin, at the outer edge of which a primitive granitic oceanic arc formed (380–385 Ma; zircon δ\n 18\n O 3.6–5.2 δ\n 18\n ‰). Ridge extinction initiated under-thrusting of the oceanic crust below the continent and an important mid-to-high grade metamorphic event M\n 2\n (D\n 2\n -S\n 2;\n 375–360 Ma), its peak dated by metamorphic zircon rims in migmatite at 365 ± 3 Ma. Basin closure occurred after intrusion of S-type granites (357 ± 2 Ma; zircon δ\n 18\n O 7.4–10.4‰) in the foreland, and accretion of gabbros, cumulate gabbros and trondhjemites at the proto-Pacific margin. Compression prevailed for 20 Myr in the foreland, causing a mylonitic medium-grade M\n 3\n (D\n 3\n -S\n 3\n ) event.\n \n \n Supplementary material:\n https://doi.org/10.6084/m9.figshare.c.6989873\n","PeriodicalId":17320,"journal":{"name":"Journal of the Geological Society","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Late Paleozoic magmatism and foreland deformation associated with opening and closing of marginal basins in the North Patagonian Andes\",\"authors\":\"C. Rapela, M. García, F. Hervé, R. Pankhurst, M. Calderon, C. Fanning, S. Verdecchia\",\"doi\":\"10.1144/jgs2023-171\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n Remnants of coeval Devonian oceanic and continental foreland rocks are preserved in the basement of the North Patagonian Andes. Our previous studies of igneous rocks have shown the primitive oceanic and continental igneous rocks are coeval, and belong to a marginal basin that opened and closed over 50 Myr. A structural study and four new U-Pb SHRIMP ages and zircon Hf-O determinations allow identification of three metamorphic episodes, the first one M\\n 1\\n (D\\n 1\\n -S\\n 1\\n ) coeval with Andean type granite intrusion in the foreland (405–380 Ma). This activity was simultaneous with development of an oceanic ridge and a marginal basin, at the outer edge of which a primitive granitic oceanic arc formed (380–385 Ma; zircon δ\\n 18\\n O 3.6–5.2 δ\\n 18\\n ‰). Ridge extinction initiated under-thrusting of the oceanic crust below the continent and an important mid-to-high grade metamorphic event M\\n 2\\n (D\\n 2\\n -S\\n 2;\\n 375–360 Ma), its peak dated by metamorphic zircon rims in migmatite at 365 ± 3 Ma. Basin closure occurred after intrusion of S-type granites (357 ± 2 Ma; zircon δ\\n 18\\n O 7.4–10.4‰) in the foreland, and accretion of gabbros, cumulate gabbros and trondhjemites at the proto-Pacific margin. Compression prevailed for 20 Myr in the foreland, causing a mylonitic medium-grade M\\n 3\\n (D\\n 3\\n -S\\n 3\\n ) event.\\n \\n \\n Supplementary material:\\n https://doi.org/10.6084/m9.figshare.c.6989873\\n\",\"PeriodicalId\":17320,\"journal\":{\"name\":\"Journal of the Geological Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2024-01-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the Geological Society\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.1144/jgs2023-171\",\"RegionNum\":3,\"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":"Journal of the Geological Society","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1144/jgs2023-171","RegionNum":3,"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

北巴塔哥尼亚安第斯山脉的基底中保存着共生泥盆纪大洋岩和大陆前陆岩的遗迹。我们之前对火成岩的研究表明,原始的大洋岩和大陆火成岩是共生的,属于一个边缘盆地,其开合时间超过50万年。通过结构研究和四个新的 U-Pb SHRIMP 年龄以及锆石 Hf-O 测定,我们确定了三个变质期,第一个 M 1(D 1 -S 1)与前陆的安第斯型花岗岩侵入期(405-380Ma)同时期。这一活动与洋脊和边缘盆地的发展同时进行,在洋脊和边缘盆地的外缘形成了原始花岗岩洋弧(380-385 Ma;锆石 δ 18 O 3.6-5.2 δ 18 ‰)。海脊的消亡引发了大陆下方大洋地壳的下推,并引发了重要的中高级变质事件M 2(D 2 -S 2;375-360Ma),其峰值被偏闪长岩中的变质锆石边缘测定为365 ± 3Ma。在前陆侵入S型花岗岩(357 ± 2 Ma;锆石δ 18 O 7.4-10.4‰),并在原太平洋边缘增生辉长岩、累积辉长岩和闪长岩之后,盆地开始封闭。前陆的压缩作用持续了20Myr,造成了麦饭石中级M 3(D 3 -S 3)事件。 补充材料:https://doi.org/10.6084/m9.figshare.c.6989873
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
Late Paleozoic magmatism and foreland deformation associated with opening and closing of marginal basins in the North Patagonian Andes
Remnants of coeval Devonian oceanic and continental foreland rocks are preserved in the basement of the North Patagonian Andes. Our previous studies of igneous rocks have shown the primitive oceanic and continental igneous rocks are coeval, and belong to a marginal basin that opened and closed over 50 Myr. A structural study and four new U-Pb SHRIMP ages and zircon Hf-O determinations allow identification of three metamorphic episodes, the first one M 1 (D 1 -S 1 ) coeval with Andean type granite intrusion in the foreland (405–380 Ma). This activity was simultaneous with development of an oceanic ridge and a marginal basin, at the outer edge of which a primitive granitic oceanic arc formed (380–385 Ma; zircon δ 18 O 3.6–5.2 δ 18 ‰). Ridge extinction initiated under-thrusting of the oceanic crust below the continent and an important mid-to-high grade metamorphic event M 2 (D 2 -S 2; 375–360 Ma), its peak dated by metamorphic zircon rims in migmatite at 365 ± 3 Ma. Basin closure occurred after intrusion of S-type granites (357 ± 2 Ma; zircon δ 18 O 7.4–10.4‰) in the foreland, and accretion of gabbros, cumulate gabbros and trondhjemites at the proto-Pacific margin. Compression prevailed for 20 Myr in the foreland, causing a mylonitic medium-grade M 3 (D 3 -S 3 ) event. Supplementary material: https://doi.org/10.6084/m9.figshare.c.6989873
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
Journal of the Geological Society
Journal of the Geological Society 地学-地球科学综合
CiteScore
6.00
自引率
3.70%
发文量
68
审稿时长
6-12 weeks
期刊介绍: Journal of the Geological Society (JGS) is owned and published by the Geological Society of London. JGS publishes topical, high-quality recent research across the full range of Earth Sciences. Papers are interdisciplinary in nature and emphasize the development of an understanding of fundamental geological processes. Broad interest articles that refer to regional studies, but which extend beyond their geographical context are also welcomed. Each year JGS presents the ‘JGS Early Career Award'' for papers published in the journal, which rewards the writing of well-written, exciting papers from early career geologists. The journal publishes research and invited review articles, discussion papers and thematic sets.
期刊最新文献
Metamorphic and chronological records of early Permian continental collision in Beni Bousera granulites (Internal Rif belt): implications for the tectonic evolution of northern Morocco during Pangea construction Deconstruction of the Franciscan Complex central terrane mélange and re-evaluation of Franciscan mélanges and architecture of the northwestern San Francisco Bay area, California, USA Is plate tectonics a post-Archean phenomenon? A petrological perspective The application of chemostratigraphy and proximality trends to the Silurian Coralliferous Formation of SW Wales: rhythmical sedimentation during the transgression of a palaeo-shoreline Correlation and stratigraphic implications of the lowermost Cambrian Small Shelly Fossils from new sites of South China
×
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