南巴塔哥尼亚安第斯山脉外新生代深部成矿地球化学:弧移过程的证据

IF 0.9 4区 地球科学 Q3 GEOLOGY
Alejandro Sánchez Valenzuela, M. Saint-Blanquat, F. Hervé, M. Polvé, D. Morata, Phillipe De Parseval, M. Benoit
{"title":"南巴塔哥尼亚安第斯山脉外新生代深部成矿地球化学:弧移过程的证据","authors":"Alejandro Sánchez Valenzuela, M. Saint-Blanquat, F. Hervé, M. Polvé, D. Morata, Phillipe De Parseval, M. Benoit","doi":"10.5027/ANDGEOV48N3-3158","DOIUrl":null,"url":null,"abstract":"In this work, we present the results of the first study which involves most of several cenozoic satellite plutons located in a 'back-arc' position in west Patagonia, south of the present Chile Triple-Junction. 4 plutons were studied in the northern tip, and 3 in the southern one. The petrographic and geochemical character of these plutons is different enough between them to propose a further classification for them: alkaline (sensu stricto): only the Monte Balmaceda Igneous complex, in the southern extremity; \"intra-plate transitional\" calc-alkaline: Río de Las Nieves and San Lorenzo plutons in the northern area, and the Torres del Paine Igneous Complex, in the southern area; and \"arc transitional\" calc-alkaline: the Paso de Las Llaves and Cerro Negro del Ghío plutons in the northern area, and the Cerro Donoso Pluton in the southern area. The \"transitional\" character, together with the plutons location, and regional context, can be explained by a Mio-Pliocene eastward arc migration coeval with the beginning of the Chile Rise subduction . Slab flattening hypothesis is favoured to explain the arc-migration, and together with the different length and time of arrival of the Chile Rise segments, contributed to the plutons heterogeneous geochemistry.","PeriodicalId":49108,"journal":{"name":"Andean Geology","volume":" ","pages":""},"PeriodicalIF":0.9000,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Cenozoic plutonism geochemistry in the extra-andean southern Patagonia as evidences of arc migration process\",\"authors\":\"Alejandro Sánchez Valenzuela, M. Saint-Blanquat, F. Hervé, M. Polvé, D. Morata, Phillipe De Parseval, M. Benoit\",\"doi\":\"10.5027/ANDGEOV48N3-3158\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this work, we present the results of the first study which involves most of several cenozoic satellite plutons located in a 'back-arc' position in west Patagonia, south of the present Chile Triple-Junction. 4 plutons were studied in the northern tip, and 3 in the southern one. The petrographic and geochemical character of these plutons is different enough between them to propose a further classification for them: alkaline (sensu stricto): only the Monte Balmaceda Igneous complex, in the southern extremity; \\\"intra-plate transitional\\\" calc-alkaline: Río de Las Nieves and San Lorenzo plutons in the northern area, and the Torres del Paine Igneous Complex, in the southern area; and \\\"arc transitional\\\" calc-alkaline: the Paso de Las Llaves and Cerro Negro del Ghío plutons in the northern area, and the Cerro Donoso Pluton in the southern area. The \\\"transitional\\\" character, together with the plutons location, and regional context, can be explained by a Mio-Pliocene eastward arc migration coeval with the beginning of the Chile Rise subduction . Slab flattening hypothesis is favoured to explain the arc-migration, and together with the different length and time of arrival of the Chile Rise segments, contributed to the plutons heterogeneous geochemistry.\",\"PeriodicalId\":49108,\"journal\":{\"name\":\"Andean Geology\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2021-06-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Andean Geology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.5027/ANDGEOV48N3-3158\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Andean Geology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.5027/ANDGEOV48N3-3158","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOLOGY","Score":null,"Total":0}
引用次数: 1

摘要

在这项工作中,我们介绍了第一项研究的结果,该研究涉及位于巴塔哥尼亚西部“后弧”位置的几个新生代卫星深成岩体中的大多数,该位置位于现在的智利三联结以南。在北端研究了4个深成岩体,在南端研究了3个。这些深成岩体的岩相和地球化学特征在它们之间的差异足以为它们提出进一步的分类:碱性(严格意义上):只有位于南端的Monte Balmaceda火成岩杂岩;“板块内过渡”钙碱性:北部地区的Río de Las Nieves和San Lorenzo深成岩体,以及南部地区的Torres del Paine火成岩杂岩;和“弧形过渡”钙碱性:北部地区的Paso de Las Llaves和Cerro Negro del Ghío深成岩体,以及南部地区的Cerro Donoso Pluton。这种“过渡”特征,加上深成岩体的位置和区域背景,可以用中新世向东弧迁移与智利隆起俯冲的开始同时代来解释。板块压扁假说有利于解释弧的迁移,加上智利隆起段的不同长度和到达时间,有助于形成深成岩体的非均质性地球化学。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cenozoic plutonism geochemistry in the extra-andean southern Patagonia as evidences of arc migration process
In this work, we present the results of the first study which involves most of several cenozoic satellite plutons located in a 'back-arc' position in west Patagonia, south of the present Chile Triple-Junction. 4 plutons were studied in the northern tip, and 3 in the southern one. The petrographic and geochemical character of these plutons is different enough between them to propose a further classification for them: alkaline (sensu stricto): only the Monte Balmaceda Igneous complex, in the southern extremity; "intra-plate transitional" calc-alkaline: Río de Las Nieves and San Lorenzo plutons in the northern area, and the Torres del Paine Igneous Complex, in the southern area; and "arc transitional" calc-alkaline: the Paso de Las Llaves and Cerro Negro del Ghío plutons in the northern area, and the Cerro Donoso Pluton in the southern area. The "transitional" character, together with the plutons location, and regional context, can be explained by a Mio-Pliocene eastward arc migration coeval with the beginning of the Chile Rise subduction . Slab flattening hypothesis is favoured to explain the arc-migration, and together with the different length and time of arrival of the Chile Rise segments, contributed to the plutons heterogeneous geochemistry.
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
Andean Geology
Andean Geology 地学-地质学
CiteScore
3.90
自引率
0.00%
发文量
17
审稿时长
>12 weeks
期刊介绍: This journal publishes original and review articles on geology and related sciences, in Spanish or English, in three issues a year (January, May and September). Articles or notes on major topics of broad interest in Earth Sciences dealing with the geology of South and Central America and Antarctica, and particularly of the Andes, are welcomed. The journal is interested in publishing thematic sets of papers and accepts articles dealing with systematic Paleontology only if their main focus is the chronostratigraphical, paleoecological and/or paleogeographical importance of the taxa described therein.
×
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
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
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 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信