The fate of primary iron sulfides in the CM1 carbonaceous chondrites: Effects of advanced aqueous alteration on primary components
The fate of primary iron sulfides in the CM1 carbonaceous chondrites: Effects of advanced aqueous alteration on primary components
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CM1 碳质球粒陨石中原生铁硫化物的命运:高级水蚀变对原生成分的影响
DOI:
10.1111/maps.14132
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发表时间:
2024
影响因子:
2.2
通讯作者:
Brearley, A. J.
中科院分区:
文献类型:
--
作者:
Singerling, S. A.;Corrigan, C. M.;Brearley, A. J.
We have carried out a SEM‐EPMA‐TEM study to determine the textures and compositions of relict primary iron sulfides and their alteration products in a suite of moderately to heavily altered CM1 carbonaceous chondrites. We observed four textural groups of altered primary iron sulfides: (1) pentlandite+phyllosilicate (2P) grains, characterized by pentlandite with submicron lenses of phyllosilicates; (2) pyrrhotite+pentlandite+magnetite (PPM) grains, characterized by pyrrhotite–pentlandite exsolution textures with magnetite veining and secondary pentlandite; (3) pentlandite+serpentine (PS) grains, characterized by relict pentlandite exsolution, serpentine, and secondary pentlandite; and (4) pyrrhotite+pentlandite+magnetite+serpentine (PPMS) grains, characterized by features of both the PPM and PS grains. We have determined that all four groups were initially primary iron sulfides, which formed from crystallization of immiscible sulfide melts within silicate chondrules in the solar nebula. The fact that such different alteration products could result from the same precursor sulfides within even the same meteorite sample further underscores the complexity of the aqueous alteration environment for the CM chondrites. The different alteration reactions for each textural group place constraints on the mechanisms and conditions of alteration with evidence for acidic environments, oxidizing environments, and changing fluid compositions (Ni‐bearing and Si‐Mg‐bearing).
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影响因子:
5
作者:
MCSWEEN, HY
通讯作者:
MCSWEEN, HY
影响因子:
5
作者:
M. Suttle;A. J. King;P. Schofield;Helena C. Bates;Sara S. Russell
通讯作者:
Sara S. Russell
影响因子:
5
作者:
Lee, MR;Bland, PA
通讯作者:
Bland, PA
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
A. Brearley;C. Martínez
通讯作者:
C. Martínez
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
D. Lauretta;B. Fegley;K. Lodders;D. T. Kremser
通讯作者:
D. T. Kremser