Zhitao Xu, Liying Sun, Xiqing Ye, Mengmeng Li, Xiaodong Pan, Yujia Song
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This study demonstrates that the pre-shield and post-shield mafic magmas in the CTV were likely derived from an enriched mantle source with an I-type signature related to the rollback of the Pacific plate.</p></div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Geochemistry of apatites from preshield and postshield basalts and their petrogenetic implications: A case study of the Naitoushan basalt and Heishigou dike in the Changbaishan Tianchi volcano, NE China\",\"authors\":\"Zhitao Xu, Liying Sun, Xiqing Ye, Mengmeng Li, Xiaodong Pan, Yujia Song\",\"doi\":\"10.1007/s00710-024-00863-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, laser ablation–multicollector–inductively coupled plasma–mass spectrometry (LA–MC–ICP–MS) of apatites and LA–ICP–MS of zircons are used to collect U–Pb geochronological data, Rb–Sr isotope chronology is used to analyze alkaline feldspar and plagioclase, and archival apatite geochemistry data for the exposed Naitoushan basalt and Heishigou dike in the Changbaishan Tianchi volcano (CTV) are accessed to examine the petrogenesis and determine the origin of basaltic magmatism in the CTV. 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引用次数: 0
摘要
本研究利用激光烧蚀-多收集器-电感耦合等离子体质谱(LA-MC-ICP-MS)和锆石的LA-ICP-MS收集U-Pb地质年代数据,利用Rb-Sr同位素年代学分析碱性长石和斜长石、并获取长白山天池火山(CTV)出露的泥头山玄武岩和黑石沟堤坝的磷灰石地球化学档案数据,以研究岩石成因并确定长白山天池火山玄武岩岩浆活动的起源。内托山玄武岩和黑石沟堤分别形成于 22.2-18.7 Ma 和 0.230-0.218 Ma。报告了两个样本的原位氧化物、挥发物、微量元素地球化学和磷灰石的钍钕同位素。大多数磷灰石处于早期结晶阶段,在斜长石中形成八面体或近八面体包裹体。它们具有较高的氧化镁和 K2O/Na2O 浓度;较低的 F 和 Cl 浓度;Ba、Sr、Nb、Ta、Zr、Hf、K 和 Ti 贫化;以及 Th、U、Ce、Pb、P 和 Nd 富集。与重稀土元素相比,所有磷灰石样品都富含轻稀土元素(REEs),并且具有相对均匀的Th/U、Zr/Hf、La/Sm和Nd/Tb比率以及Sr-Nd同位素组成;因此,它们的主岩浆可能与大洋岛屿玄武岩具有相同的岩浆起源。磷灰石的 La、Yb 和 U 含量、Eu/Eu* 和 La/Yb 值以及较高的 REE 含量显示了岩浆的弱结晶序列。这项研究表明,CTV 的前屏蔽和后屏蔽岩浆很可能来自富集的地幔源,其 I 型特征与太平洋板块的滚回有关。
Geochemistry of apatites from preshield and postshield basalts and their petrogenetic implications: A case study of the Naitoushan basalt and Heishigou dike in the Changbaishan Tianchi volcano, NE China
In this study, laser ablation–multicollector–inductively coupled plasma–mass spectrometry (LA–MC–ICP–MS) of apatites and LA–ICP–MS of zircons are used to collect U–Pb geochronological data, Rb–Sr isotope chronology is used to analyze alkaline feldspar and plagioclase, and archival apatite geochemistry data for the exposed Naitoushan basalt and Heishigou dike in the Changbaishan Tianchi volcano (CTV) are accessed to examine the petrogenesis and determine the origin of basaltic magmatism in the CTV. The Naitoushan basalt and Heishigou dike formed at 22.2–18.7 and 0.230–0.218 Ma, respectively. In situ oxides, volatiles, trace element geochemistry and Sr–Nd isotopes of apatite are reported for two samples. Most apatites are in the early crystallization phase and form inclusions in plagioclase that are euhedral or subhedral. They have higher MgO and K2O/Na2O concentrations; lower F and Cl concentrations; Ba, Sr, Nb, Ta, Zr, Hf, K, and Ti depletion; and Th, U, Ce, Pb, P, and Nd enrichment. All apatite samples are enriched in light rare earth elements (REEs) relative to heavy REEs and have relatively homogeneous Th/U, Zr/Hf, La/Sm, and Nd/Tb ratios and Sr–Nd isotopic compositions; thus, their host magmas potentially have the same magmatic origin as oceanic island basalt. The apatite La, Yb, and U contents, Eu/Eu* and La/Yb values, and high REE contents show a weak crystallization sequence in the mafic magma. This study demonstrates that the pre-shield and post-shield mafic magmas in the CTV were likely derived from an enriched mantle source with an I-type signature related to the rollback of the Pacific plate.
期刊介绍:
Mineralogy and Petrology welcomes manuscripts from the classical fields of mineralogy, igneous and metamorphic petrology, geochemistry, crystallography, as well as their applications in academic experimentation and research, materials science and engineering, for technology, industry, environment, or society. The journal strongly promotes cross-fertilization among Earth-scientific and applied materials-oriented disciplines. Purely descriptive manuscripts on regional topics will not be considered.
Mineralogy and Petrology was founded in 1872 by Gustav Tschermak as "Mineralogische und Petrographische Mittheilungen". It is one of Europe''s oldest geoscience journals. Former editors include outstanding names such as Gustav Tschermak, Friedrich Becke, Felix Machatschki, Josef Zemann, and Eugen F. Stumpfl.