CAREER: Petrogenesis of Hawaiian lavas, Constraints from metal stable isotopes

职业：夏威夷熔岩的岩石成因，金属稳定同位素的限制

• 批准号: 1942042
• 负责人: Shichun Huang
• 金额: $ 55.82万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-02-01 至 2022-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1942042&HistoricalAwards=false
• 关键词: CAREER; Petrogenesis; Hawaiian; lavas; Constraints

This CAREER project will focus on understanding the source of the magmas that erupt in Hawaii. Hawaiian volcanism is often used as the best example of magmatism formed by the rise of a mantle plume from deep in the Earth's interior. The mantle plume hypothesis provides an elegant interpretation for many intra-plate volcanism, such as Hawaii, which has been important in shaping the Earth’s surface and its biosphere throught Earth's history. However, many aspects of mantle plumes, and even their existence, remain highly debated. In this study, the investigator sets out to use several state-of-the-art geochemical and isotopic tracers to understand the evolution of Hawaiian volcanism, and its implications for the mantle plume hypothesis. Among those proposed tracers, he will conduct the systematic analysis of several novel metal stable isotope tracers on for a set of Hawaiian samples. The PI also plans a summer education program focusing on analytical geochemistry, which complements the existing strong field-oriented research and education activities in the Geoscience Department at the University of Nevada Las Vegas (UNLV). This summer program will leverage the geochemical analytical labs inside the department to train undergraduate students with the cutting-edge geochemical analytical techniques. This summer program is research oriented and requires the participating students to complete a research project using the available analytical facilities under the supervision of their faculty mentors.The PI proposes an extensive metal stable isotope investigation, including Mg, Ca, Cr, Ti, and Fe, on well-studied lavas from six Hawaiian volcanoes. They cover the whole compositional and isotopic ranges in Hawaii, which represent a large portion of those found in global ocean island basalts. The new metal stable isotope data, together with the published geochemical data on the same lavas, will allow the PI to better understand (1) the geochemical structure of the Hawaiian plume, (2) the petrogenesis of Hawaiian lavas, and (3) their implications to the plume hypothesis. The PI is actively recruiting students into the summer research program using a variety of approaches. The diverse student body at UNLV ensures that a large proportion of the participating students will be from underrepresented groups. The proposed research and education activities are synergistic, because the PI plans to (1) use part of the proposed research as student projects of the summer program, and (2) recruit qualified and motivated students trained through this summer program to work on his proposed research.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个职业项目将重点了解夏威夷喷发的岩浆的来源，夏威夷火山活动通常被用作地幔柱从地球内部深处升起形成的岩浆作用的最佳例子，地幔柱假说提供了一个优雅的假设。对许多板内火山活动的解释，例如夏威夷，它在地球历史上对塑造地球表面及其生物圈发挥了重要作用。然而，地幔柱的许多方面，甚至是它们的地幔柱。在这项研究中，研究人员着手使用几种最先进的地球化学和同位素示踪剂来了解夏威夷火山活动的演化及其对地幔柱假说的影响。他将对一组夏威夷样品进行几种新型金属稳定同位素示踪剂的系统分析。首席研究员还计划开展一个以分析地球化学为重点的夏季教育计划，以补充现有的强大的现场导向研究和教育。内华达大学拉斯维加斯分校 (UNLV) 地球科学系的活动 该暑期项目将利用该系内的地球化学分析实验室来培训本科生掌握尖端的地球化学分析技术。参与的学生在导师教师的监督下使用可用的分析设施完成一个研究项目。PI 提议对来自六个夏威夷的经过充分研究的熔岩进行广泛的金属稳定同位素研究，包括镁、钙、铬、钛和铁它们涵盖了夏威夷的整个成分和同位素范围，代表了全球海洋岛屿玄武岩中发现的大部分成分和同位素范围。新的金属稳定同位素数据以及已发布的同一熔岩的地球化学数据将使 PI 能够更好地了解 (1) 夏威夷羽流的地球化学结构，(2) 夏威夷熔岩的岩石成因，以及 (3) 它们对羽流假说的影响 PI 正在积极招募学生参加夏季研究计划。内华达大学拉斯维加斯分校多样化的学生群体确保了大部分参与学生来自代表性不足的群体，因为 PI 计划 (1) 使用部分拟议的研究。夏季计划的学生项目，以及（2）招募通过该夏季计划培训的合格且积极主动的学生来从事他提出的研究。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的评估进行评估，被认为值得支持影响审查标准。

项目成果

Machine Learning Investigation of Clinopyroxene Compositions to Evaluate and Predict Mantle Metasomatism Worldwide

• DOI: 10.1029/2021jb023614
• 发表时间: 2022-05
• 期刊: Journal of Geophysical Research: Solid Earth
• 作者: Ben Qin;Fang Huang;Shichun Huang;André Python;Yunfeng Chen;J. ZhangZhou

Discovery of davemaoite, CaSiO 3 -perovskite, as a mineral from the lower mantle

发现了来自下地幔的 davemaoite（CaSiO 3 -钙钛矿）

• DOI: 10.1126/science.abl8568
• 发表时间: 2021
• 期刊: Science
• 影响因子: 56.9
• 作者: Tschauner, Oliver;Huang, Shichun;Yang, Shuying;Humayun, Munir;Liu, Wenjun;Gilbert Corder, Stephanie N;Bechtel, Hans A.;Tischler, Jon;Rossman, George R.
• 通讯作者: Rossman, George R.

Sulfur isotopic signature of Earth established by planetesimal volatile evaporation

通过星子挥发性蒸发建立的地球硫同位素特征

• DOI: 10.1038/s41561-021-00838-6
• 发表时间: 2021
• 期刊: Nature Geoscience
• 影响因子: 18.3
• 作者: Wang, Wenzhong;Li, Chun-Hui;Brodholt, John P.;Huang, Shichun;Walter, Michael J.;Li, Min;Wu, Zhongqing;Huang, Fang;Wang, Shui-Jiong
• 通讯作者: Wang, Shui-Jiong

Pressure and concentration effects on intermineral calcium isotope fractionation involving garnet

• DOI: 10.1016/j.chemgeo.2022.120722
• 发表时间: 2022-01
• 期刊: Chemical Geology
• 影响因子: 3.9
• 作者: Yonghui Li;ZhongqingWu;Shichun Huang;Wenzhong Wang

Response to Comment on “Discovery of davemaoite, CaSiO 3 -perovskite, as a mineral from the lower mantle”

对“发现来自下地幔的矿物 davemaoite、CaSiO 3 -钙钛矿”的评论的回应

• DOI: 10.1126/science.abo2029
• 发表时间: 2022
• 期刊: Science
• 影响因子: 56.9
• 作者: Tschauner, Oliver;Huang, Shichun;Humayun, Munir;Liu, Wenjun;Rossman, George R.
• 通讯作者: Rossman, George R.