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
复制标题

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
复制
发表时间:
2024
影响因子:
2.2
通讯作者:
Brearley, A. J.
Brearley, A. J.
中科院分区:
地球科学3区
文献类型:
--
作者:
Singerling, S. A.;Corrigan, C. M.;Brearley, A. J.

文献摘要

参考文献

相似文献

我们进行了 SEM-EPMA-TEM 研究,以确定一组中度至重度蚀变的 CM1 碳质球粒陨石中残留的原生铁硫化物及其蚀变产物的结构和成分。我们观察到了四种改变的原生铁硫化物的结构组:(1)镍黄铁矿+层状硅酸盐(2P)颗粒,其特征是镍黄铁矿具有层状硅酸盐的亚微米透镜体; (2)磁黄铁矿+镍黄铁矿+磁铁矿(PPM)颗粒,其特征是磁黄铁矿-镍黄铁矿溶出结构,具有磁铁矿脉和次生镍黄铁矿; (3)镍黄铁矿+蛇纹石(PS)晶粒,其特征为残余镍黄铁矿溶出、蛇纹石和次生镍黄铁矿; (4)磁黄铁矿+镍黄铁矿+磁铁矿+蛇纹石(PPMS)颗粒,具有PPM和PS颗粒的特征。我们已经确定,所有四组最初都是初级铁硫化物,它们是由太阳星云硅酸盐球粒内不混溶的硫化物熔体结晶形成的。事实上,即使是同一个陨石样本中,相同的前体硫化物也可能产生这种不同的蚀变产物,这一事实进一步强调了 CM 球粒陨石水蚀变环境的复杂性。每个结构组的不同蚀变反应对蚀变的机制和条件施加了限制,有酸性环境、氧化环境和变化的流体成分(含镍和含硅镁)的证据。
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).
DOI: 10.1016/0016-7037(87)90298-5
发表时间: 1987-09-01
影响因子: 5
作者:
MCSWEEN, HY
通讯作者: MCSWEEN, HY
CM 球粒陨石的水蚀变,综述
DOI: --
发表时间: 2021
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
DOI: 10.1016/s0016-7037(03)00486-1
发表时间: 2004-02-01
影响因子: 5
作者:
Lee, MR;Bland, PA
通讯作者: Bland, PA
TIL 91722 CM2 碳质球粒陨石中镍黄铁矿和硫铁矿在磁黄铁矿中的普遍溶出:低温固态记录
DOI: --
发表时间: 2010
期刊:
影响因子: --
作者:
A. Brearley;C. Martínez
通讯作者: C. Martínez
太阳星云中硫化铁形成的动力学和机制
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