Chemical 3D-imaging of glass inclusions from allende (CV3) olivine via SIMS: A new insight on chondrule formation conditions

被引：1

作者：

Florentin, L. ^{[1
]}

Deloule, E. ^{[1
]}

Faure, F. ^{[1
]}

Mangin, D. ^{[2
]}

机构：

[1] Univ Lorraine, CNRS, UMR 5873, CRPG, BP20, F-54501 Vandoeuvre Les Nancy, France

[2] Univ Lorraine, CNRS, UMR 7198, IJL, Parc Saurupt, F-54000 Nancy, France

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 2018年 / 230卷

关键词：

Chondrule; 3D-imaging; Olivine; Glass inclusions; SIMS; SILICATE MELT INCLUSIONS; ORDINARY CHONDRITES; SOLAR-SYSTEM; ORIGIN; CONSTRAINTS; DIFFUSION; MINERALS; CA; CONDENSATION; ABUNDANCES;

D O I：

10.1016/j.gca.2018.03.021

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Natural glass inclusions - hosted in Mg-rich olivines from Allende (CV3) type I chondrules - and synthetic melt inclusions trapped in forsterite crystallized from CMAS (CaO-MgO-Al2O3 -SiO2 ) melts - were mapped by Secondary Ion Mass Spectrometry (SIMS) for CMAS major oxides. The first ever 3D chemical images of extra-terrestrial glass inclusions were obtained, along with chemical depth profiles for each oxide. Results show similar patterns for both synthetic glass inclusions (trapped in olivine formed by slow crystallization in a magmatic liquid) and natural inclusions from Allende's olivines. No incompatible-rich boundary layer or diffusion pattern was observed in either case. The absence of an incompatible-rich boundary layer suggests that the olivine overgrowth surrounding glass inclusions in Allende's olivines was formed during slow cooling of the host olivine and likely the surrounding chondrule. This provides new constraints on the cooling rates of type I chondrules. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：83 / 93

页数：11

共 4 条

[1] 3D IMAGING OF GLASS INCLUSIONS FROM ALLENDE (CV3) OLIVINES: A NEW INSIGHT ON OLIVINES FORMATION CONDITIONS.
Florentin, L.
Faure, F.
Mangin, D.
Deloule, E.
[J]. METEORITICS & PLANETARY SCIENCE, 2016, 51 : A256 - A256
[2] Glass inclusions in allende (CV3) olivine: Heating experiments
Varela, M. E.
Clocchiatti, R.
Kurat, G.
[J]. METEORITICS & PLANETARY SCIENCE, 2007, 42 : A154 - A154
[3] Origin of Na in glass inclusions hosted in olivine from Allende CV3 and Jbilet Winselwan CM2: Implications for chondrule formation
Florentin, L.
Faure, F.
Deloule, E.
Tissandier, L.
Gurenko, A.
Lequin, D.
[J]. EARTH AND PLANETARY SCIENCE LETTERS, 2017, 474 : 160 - 171
[4] Heating experiments on glass inclusions in Allende (CV3) olivines: Clues to the formation conditions of chondrules?
Varela, Maria Eugenia
[J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 2008, 72 (13) : 3170 - 3183

← 1 →