中国西昆仑造山带三叠纪布子湾南花岗岩的成因:斜长岩原位主要、微量和锶同位素分析的制约因素

IF 1 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Petrology Pub Date : 2024-09-17 DOI:10.1134/S086959112470019X
Lin Wang, Peiwen Chen, Qingdong Zeng, Renchang Mi, Runsheng Han
{"title":"中国西昆仑造山带三叠纪布子湾南花岗岩的成因:斜长岩原位主要、微量和锶同位素分析的制约因素","authors":"Lin Wang,&nbsp;Peiwen Chen,&nbsp;Qingdong Zeng,&nbsp;Renchang Mi,&nbsp;Runsheng Han","doi":"10.1134/S086959112470019X","DOIUrl":null,"url":null,"abstract":"<p>Buziwannan granodiorite and monzogranite associated with gold–polymetallic mineralization are located in the West Kunlun Orogen Belt in northwest China. Granodiorite was emplaced earlier than monzogranite. To determine the genesis of plagioclase from two intrusions and their relation with mineralization, the major, trace elemental, and Sr isotopic compositions of plagioclase were determined through LA-ICP-MS and LA-MC-ICP-MS respectively. The results indicated that the plagioclase from granodiorite had a high-An (around 40%) core and low-An (around 33%) rim, while the plagioclase from monzogranite was uniform with an An value around 18%. The (<sup>87</sup>Sr/<sup>86</sup>Sr)<sub>i</sub> ratios of plagioclase decreased with decreasing An value, which may be caused by small-scale crustal contamination and/or magma mixing. The crystallization process of plagioclase is mainly accompanied by the exsolution of magmatic H<sub>2</sub>O, and the pressure changes caused by the loss of magma H<sub>2</sub>O. These magmatic fluids are rich in ore-forming elements, such as Au–Ag–Cu–Zn, and form skarn mineralization near the wall rocks. Because of the co-crystallization of plagioclase, hornblende, and biotite, as well as the addition of minor felsic magma with lower Sr isotopic composition, the plagioclase from monzogranite exhibits low and uniform <i>An</i> values. In addition, a large amount of magmatic H<sub>2</sub>O carrying ore-forming elements was released during the emplacement of granodiorite, which caused the monzogranite to lose its metallogenic potential.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Genesis of Triassic Buziwannan Granites in the West Kunlun Orogen Belt, China: Constraints from in Situ Major, Trace and Sr Isotope Analyses of Plagioclase\",\"authors\":\"Lin Wang,&nbsp;Peiwen Chen,&nbsp;Qingdong Zeng,&nbsp;Renchang Mi,&nbsp;Runsheng Han\",\"doi\":\"10.1134/S086959112470019X\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Buziwannan granodiorite and monzogranite associated with gold–polymetallic mineralization are located in the West Kunlun Orogen Belt in northwest China. Granodiorite was emplaced earlier than monzogranite. To determine the genesis of plagioclase from two intrusions and their relation with mineralization, the major, trace elemental, and Sr isotopic compositions of plagioclase were determined through LA-ICP-MS and LA-MC-ICP-MS respectively. The results indicated that the plagioclase from granodiorite had a high-An (around 40%) core and low-An (around 33%) rim, while the plagioclase from monzogranite was uniform with an An value around 18%. The (<sup>87</sup>Sr/<sup>86</sup>Sr)<sub>i</sub> ratios of plagioclase decreased with decreasing An value, which may be caused by small-scale crustal contamination and/or magma mixing. The crystallization process of plagioclase is mainly accompanied by the exsolution of magmatic H<sub>2</sub>O, and the pressure changes caused by the loss of magma H<sub>2</sub>O. These magmatic fluids are rich in ore-forming elements, such as Au–Ag–Cu–Zn, and form skarn mineralization near the wall rocks. Because of the co-crystallization of plagioclase, hornblende, and biotite, as well as the addition of minor felsic magma with lower Sr isotopic composition, the plagioclase from monzogranite exhibits low and uniform <i>An</i> values. In addition, a large amount of magmatic H<sub>2</sub>O carrying ore-forming elements was released during the emplacement of granodiorite, which caused the monzogranite to lose its metallogenic potential.</p>\",\"PeriodicalId\":20026,\"journal\":{\"name\":\"Petrology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2024-09-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Petrology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S086959112470019X\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petrology","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S086959112470019X","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0

摘要

摘要 与金多金属矿化有关的布子湾南花岗闪长岩和单斜花岗岩位于中国西北部的西昆仑造山带。花岗闪长岩的成因早于单斜花岗岩。为了确定两个侵入体中斜长岩的成因及其与成矿作用的关系,通过LA-ICP-MS和LA-MC-ICP-MS分别测定了斜长岩的主要元素、微量元素和锶同位素组成。结果表明,花岗闪长岩中的斜长岩具有高An(约40%)核心和低An(约33%)边缘,而单斜长岩中的斜长岩则很均匀,An值约为18%。斜长岩的(87Sr/86Sr)i 比值随 An 值的降低而降低,这可能是小规模地壳污染和/或岩浆混合造成的。斜长石的结晶过程主要伴随着岩浆 H2O 的溶出和岩浆 H2O 损失引起的压力变化。这些岩浆流体富含成矿元素,如金-银-铜-锌,并在壁岩附近形成矽卡岩矿化。由于斜长石、角闪石和斜长石的共晶体化,以及加入了少量 Sr 同位素组成较低的长纤维岩浆,来自单斜长花岗岩的斜长石表现出低而均匀的 An 值。此外,在花岗闪长岩的成岩过程中,大量携带成矿元素的岩浆 H2O 被释放出来,使单斜花岗岩失去了成矿潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

摘要图片

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
Genesis of Triassic Buziwannan Granites in the West Kunlun Orogen Belt, China: Constraints from in Situ Major, Trace and Sr Isotope Analyses of Plagioclase

Buziwannan granodiorite and monzogranite associated with gold–polymetallic mineralization are located in the West Kunlun Orogen Belt in northwest China. Granodiorite was emplaced earlier than monzogranite. To determine the genesis of plagioclase from two intrusions and their relation with mineralization, the major, trace elemental, and Sr isotopic compositions of plagioclase were determined through LA-ICP-MS and LA-MC-ICP-MS respectively. The results indicated that the plagioclase from granodiorite had a high-An (around 40%) core and low-An (around 33%) rim, while the plagioclase from monzogranite was uniform with an An value around 18%. The (87Sr/86Sr)i ratios of plagioclase decreased with decreasing An value, which may be caused by small-scale crustal contamination and/or magma mixing. The crystallization process of plagioclase is mainly accompanied by the exsolution of magmatic H2O, and the pressure changes caused by the loss of magma H2O. These magmatic fluids are rich in ore-forming elements, such as Au–Ag–Cu–Zn, and form skarn mineralization near the wall rocks. Because of the co-crystallization of plagioclase, hornblende, and biotite, as well as the addition of minor felsic magma with lower Sr isotopic composition, the plagioclase from monzogranite exhibits low and uniform An values. In addition, a large amount of magmatic H2O carrying ore-forming elements was released during the emplacement of granodiorite, which caused the monzogranite to lose its metallogenic potential.

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
Petrology
Petrology 地学-地球科学综合
CiteScore
2.40
自引率
20.00%
发文量
27
审稿时长
>12 weeks
期刊介绍: Petrology is a journal of magmatic, metamorphic, and experimental petrology, mineralogy, and geochemistry. The journal offers comprehensive information on all multidisciplinary aspects of theoretical, experimental, and applied petrology. By giving special consideration to studies on the petrography of different regions of the former Soviet Union, Petrology provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.
期刊最新文献
Osumilite-Bearing Lavas of the Keli Highland (Greater Caucasus): Petrological and Geochemical Characteristics, Mineral Composition, and Conditions of Melt Generation The First Discovery of Archean Dolerite Dikes in the Western Part of the Aldan Shield Generalized P–T Path and Fluid Regime of the Exhumation of Metapelites in the Central Zone of the Limpopo Complex, South Africa Raman Spectroscopic Data of the Quenching Phases of a Pt Solution in a Low Water Reduced Carbonic Fluid at P = 200 and T = 950–1000°C Genesis of Triassic Buziwannan Granites in the West Kunlun Orogen Belt, China: Constraints from in Situ Major, Trace and Sr Isotope Analyses of Plagioclase
×
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