Tracing the earliest stages of hydrothermal alteration on the CM chondrite parent body
Tracing the earliest stages of hydrothermal alteration on the CM chondrite parent body
复制标题
追踪 CM 球粒陨石母体热液蚀变的最早阶段
DOI:
10.1111/maps.13734
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发表时间:
2021
影响因子:
2.2
通讯作者:
King A
中科院分区:
文献类型:
--
作者:
King A
The CM carbonaceous chondrites are an important resource in our efforts to understand the role of volatiles in the formation of planetary systems. We report the bulk mineralogy, water abundance, and infrared (IR) reflectance spectra of the CM chondrites LaPaz Icefield (LAP) 04514, LAP 04796, LAP 04565, and LAP 02333. They contain abundant Fe‐ and Mg‐rich serpentines (~70–80 vol%), and based on their phyllosilicate fractions, we classify LAP 04514, LAP 04796, and LAP 04565 as petrologic subtype 1.6 and LAP 02333 as 1.4. This is consistent with estimated water abundances of 9.9 (±1.1) wt% for LAP 04796, 10.4 (±0.1) wt% for LAP 04565, and 11.5 (±0.5) wt% for LAP 02333. However, LAP 04514 contains less water (8.8 ± 0.3 wt%), has a shallower 3 µm band depth, and lacks tochilinite having experienced posthydration temperatures of ~300–400 °C. We conclude that LAP 04514, LAP 04796, and LAP 04565 are among the least altered CM chondrites, which retain primitive features from the initial building blocks of the CM parent body. Finally, we use the IR spectral features of LAP 04514, LAP 04796, and LAP 04565 to identify C‐complex asteroid surfaces that record mild levels of hydration.
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影响因子:
2.2
作者:
D. Takir;J. Emery;H. McSween;C. Hibbitts;R. Clark;N. Pearson;Alian Wang
通讯作者:
D. Takir;J. Emery;H. McSween;C. Hibbitts;R. Clark;N. Pearson;Alian Wang
影响因子:
2.2
作者:
M. Weisberg;Caroline L. Smith;G. Benedix;L. Folco;K. Righter;J. Zipfel;A. Yamaguchi;H. C. Aoudjehane
通讯作者:
M. Weisberg;Caroline L. Smith;G. Benedix;L. Folco;K. Righter;J. Zipfel;A. Yamaguchi;H. C. Aoudjehane
影响因子:
5
作者:
King, A. J.;Schofield, P. F.;Russell, S. S.
通讯作者:
Russell, S. S.
影响因子:
2.2
作者:
D. Harries;F. Langenhorst
通讯作者:
F. Langenhorst
影响因子:
2.7
作者:
P. Schofield;K. S. Knight;S. Covey;G. Cressey;I. Stretton
通讯作者:
I. Stretton