IODP Exp 352: investigating conditions of subduction initiation with stable isotopes

IODP Exp 352：用稳定同位素研究俯冲起始条件

• 批准号: NE/M010643/1
• 负责人: Julie Prytulak
• 金额: $ 2.78万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FM010643%2F1
• 关键词: IODP; Exp; 352; investigating; conditions

The outer shell of the Earth that we live on is made up of brittle "plates". The migration of these plates across the surface of the planet is directly linked to major geologic events such as earthquakes and volcanic eruptions. In some regions, two plates collide, forcing one beneath the other in a process called 'subduction'. Subduction zones are responsible for much of the explosive volcanism on Earth, including the infamous Pacific "Ring of Fire". Why and how plate subduction starts is a matter of much debate. IODP Expedition 352 to the Bonin forearc (in the 'ring of fire') aims to recover lavas from the time period when subduction was just starting in the region. These lavas may hold the key to understanding what drives subduction initiation. Furthermore, the chemical changes recorded in the lavas may document how a subduction system evolves through time.

我们居住的地球的外壳是由易碎的“板块”组成的。这些板块在地球表面的迁移与地震和火山爆发等重大地质事件直接相关。在某些地区，两个板块碰撞，迫使一个板块在另一个板块之下，这一过程被称为“俯冲”。俯冲带是地球上大部分火山爆发的原因，包括臭名昭著的太平洋“火环”。板块俯冲为什么以及如何开始是一个有很多争论的问题。IODP远征352小笠原弧（在“火环”）的目的是恢复熔岩的时间段时，俯冲刚刚开始在该地区。这些熔岩可能掌握着理解是什么驱动俯冲开始的关键。此外，熔岩中记录的化学变化可以记录俯冲系统如何随时间演变。

项目成果

Formation mechanisms of macroscopic globules in andesitic glasses from the Izu–Bonin–Mariana forearc (IODP Expedition 352)

• DOI: 10.1007/s00410-020-01756-3
• 发表时间: 2020-12
• 期刊: Contributions to Mineralogy and Petrology
• 影响因子: 3.5
• 作者: R. Fonseca;L. Michely;M. Kirchenbaur;J. Prytulak;J. Ryan;Kerstin Hauke;F. Leitzke;R. Almeev;C. Marien;A. Gerdes;R. Schellhorn

Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352

• DOI: 10.1029/2020gc009093
• 发表时间: 2020-11
• 期刊: Geochemistry
• 影响因子: 3.7
• 作者: J. Shervais;M. Reagan;M. Godard;J. Prytulak;J. Ryan;J. Pearce;R. Almeev;Hongyang Li;E. Haugen;T. Chapman;W. Kurz;W. Nelson;D. Heaton;M. Kirchenbaur;K. Shimizu;T. Sakuyama;S. Vetter;Yibing Li;S. Whattam

Subduction initiation and ophiolite crust: new insights from IODP drilling

• DOI: 10.1080/00206814.2016.1276482
• 发表时间: 2017-01
• 期刊: International Geology Review
• 影响因子: 2.6
• 作者: M. Reagan;J. Pearce;K. Petronotis;R. Almeev;Aaron Avery;C. Carvallo;T. Chapman;G. Christeson

Radiogenic isotopes document the start of subduction in the Western Pacific

• DOI: 10.1016/j.epsl.2019.04.041
• 发表时间: 2019-07
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: Hongyang Li;R. Taylor;J. Prytulak;M. Kirchenbaur;J. Shervais;J. Ryan;M. Godard;M. Reagan

Application of a handheld X-ray fluorescence spectrometer for real-time, high-density quantitative analysis of drilled igneous rocks and sediments during IODP Expedition 352

• DOI: 10.1016/j.chemgeo.2017.01.007
• 发表时间: 2017-02
• 期刊: Chemical Geology
• 影响因子: 3.9
• 作者: J. Ryan;J. Shervais;Yibing Li;M. Reagan;Hongyang Li;D. Heaton;M. Godard;M. Kirchenbaur;S. Whattam;J. Pearce;T. Chapman;W. Nelson;J. Prytulak;K. Shimizu;K. Petronotis