Mercury (Hg) in Ryugu particles and implications for the origin of volatile elements in early Earth-Reference-Cited by-同舟云学术

Mercury (Hg) in Ryugu particles and implications for the origin of volatile elements in early Earth

Published:2024-04-04 Issue: Volume: Page:
ISSN:
Container-title:
language:
Short-container-title:

Author:

Shirai Naoki¹^ORCID,Ito Motoo²^ORCID,Yamaguchi Akira³^ORCID,Tomioka Naotaka²^ORCID,Uesugi Masayuki⁴^ORCID,Imae Naoya³,Kimura Makoto³^ORCID,Greenwood Richard⁵^ORCID,Liu Ming-Chang⁶^ORCID,Ohigashi Takuji⁷^ORCID,Sekimoto Shun⁸,Uesugi Kentaro⁴^ORCID,Nakato Aiko³^ORCID,Yogata Kasumi⁹^ORCID,Yuzawa Hayato¹⁰^ORCID,Kodama Yu¹¹,Hirahara Kaori¹²^ORCID,Sakurai Ikuya¹³^ORCID,Okada Ikuo¹³,Karouji Yuzuru¹²^ORCID,Nakazawa Satoru¹⁴^ORCID,Okada Tatsuaki¹⁴^ORCID,Tanaka Satoshi⁹,Saiki Takanao¹⁴,Terui Fuyuto¹⁵,Yoshikawa Makoto¹⁴,Miyazaki Akiko⁹^ORCID,Nishimura Masahiro⁹,Yada Toru¹⁴^ORCID,Abe Masanao¹⁴,Usui Tomohiro⁹^ORCID,Watanabe Sei-ichiro¹³^ORCID,Tsuda Yuichi¹⁴

Affiliation:

1. Kanagawa University

2. Japan Agency for Marine-Earth Science and Technology

3. National Institute of Polar Research

4. Japan Synchrotron Radiation Research Institute

5. The Open University

6. Lawrence Livermore National Laboratory

7. Photon Factory/Institute of Materials Science, High Energy Accelerator Research Organization

8. Kyoto University

9. JAXA

10. Institute for Molecular Science, UVSOR Synchrotron Facility

11. Marine Works Japan, Ltd

12. Osaka University

13. Nagoya University

14. Japan Aerospace Exploration Agency

15. Kanagawa Institute of Technology

Abstract

Solar system abundances of the elements, which are determined by spectroscopic measurements of the solar photosphere and laboratory analyses of CI (Ivuna-type) carbonaceous chondrites, are a cornerstone to understand the origin and evolution of planets and other constituents, such as asteroids and comets. Mercury (Hg) is one of the elements whose solar system abundance is still poorly constrained due to no observable lines for Hg in the solar spectrum and large variations of the Hg abundance in CI chondrites caused by mainly terrestrial contamination. Here we determined elemental abundances including Hg for uncontaminated CI-like material from asteroid Ryugu by the Hayabusa2 spacecraft. The new solar system abundance of Hg is 0.907±0.108 atoms/10⁶ Si atoms. Our results demonstrate that Hg in bulk silicate Earth originated from the addition of chondritic material after core formation, late sulfide segregation and/or degassing, and volatile elements are depleted in late-accreted materials relative to CI chondrites.

Publisher

Research Square Platform LLC

Reference50 articles.

1. Solar system abundances and condensation temperatures of the elements;Lodders K;Astrophys. J.,2003

2. Palme, H. and O’Neill, H. St. C. Cosmochemical estimates of mantle composition. In.: Carlson, R. W. (Ed.), The Mantle and Core. In: Holland, H. D., Turekian, K. K. (Eds.), Treatise on Geochemistry vol. 2 Elsevier -Pergamon, Oxford, 1–38 (2014).

3. Thermal alteration labile elements in carbonaceous chondrites;Springmann A;Icarus,2019

4. The composition of CI chondrites and their contents of chlorine and bromine: Results from instrumental neutron activation analysis;Palme H;Meteorit. Planet. Sci.,2022

5. Hg/202Hg ratio and Hg content in meteorites and terrestrial standard rocks: A RNAA study;Kumar P;Geochem. J.,2001