DOI: 10.1016/j.epsl.2018.05.007
Scopus记录号: 2-s2.0-85047057280
论文题名: Er, Yb, and Hf isotopic compositions of refractory inclusions: An integrated isotopic fingerprint of the Solar System's earliest reservoir
作者: Shollenberger Q.R. ; Render J. ; Brennecka G.A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 495 起始页码: 12
结束页码: 23
语种: 英语
英文关键词: CAI
; erbium
; hafnium
; meteorites
; nucleosynthetic anomalies
; ytterbium
Scopus关键词: Computer aided instruction
; Erbium
; Hafnium
; Inductively coupled plasma mass spectrometry
; Mass spectrometers
; Meteorites
; Nucleosynthesis
; Rocks
; Solar system
; Ytterbium
; Chemical classification
; Isotopic composition
; Isotopic investigation
; Isotopic pattern
; Multi-collector inductively coupled plasma mass spectrometry
; nucleosynthetic anomalies
; Terrestrial rocks
; Thermal ionization mass spectrometry
; Isotopes
; aluminum
; calcium
; hafnium
; inclusion
; isotopic composition
; meteorite
; solar system
英文摘要: The oldest dated solids in our Solar System, calcium–aluminum-rich inclusions (CAIs), contain isotopic anomalies in a whole suite of elements relative to later formed Solar System materials. Previous work has reported differences in the proportions of nucleosynthetic components between CAIs and terrestrial rocks as a function of mass. However, the nucleosynthetic fingerprint of the CAI-forming region is still lacking significant data in the heavier mass range (A > 154). Therefore, we present the first erbium (Er) and ytterbium (Yb) isotopic data along with hafnium (Hf) isotopic compositions in a wide variety of CAIs derived from a variety of CV and CK chondrites. This work presents new methods for Er and Yb isotopic investigation that were explored using both thermal ionization mass spectrometry (TIMS) and multicollector inductively coupled plasma mass spectrometry (MC-ICPMS). Relative to terrestrial rock standards, CAIs—regardless of host rock, petrologic or chemical classification—have uniform and resolvable Er, Yb, and Hf isotopic compositions. The CAI isotopic patterns correspond to r-process deficits (or s-process excesses) relative to terrestrial values of 9 ppm for Er, 18 ppm for Yb, and 17 ppm for Hf. This new Er, Yb, and Hf data help complete the nucleosynthetic fingerprint of the CAI-forming region, further highlighting the systematic difference between the CAIs and later formed bulk planetary bodies. Such a systematic difference between CAIs and terrestrial rocks cannot be caused by different amounts of any known single presolar phase but is likely the result of a well-mixed reservoir made of diverse stellar sources. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109831
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Institut für Planetologie, University of Münster, Wilhelm-Klemm-Straße 10, Münster, 48149, Germany
Recommended Citation:
Shollenberger Q.R.,Render J.,Brennecka G.A.. Er, Yb, and Hf isotopic compositions of refractory inclusions: An integrated isotopic fingerprint of the Solar System's earliest reservoir[J]. Earth and Planetary Science Letters,2018-01-01,495