Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Christine Houser"'
Autor:
Grace E. Shephard, Christine Houser, John W. Hernlund, Juan J. Valencia-Cardona, Reidar G. Trønnes, Renata M. Wentzcovitch
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021)
This study identifies the predicted seismic expression of the high-to-low iron spin crossover in the deep Earth mineral ferropericlase. A depth-dependent signal is detected in the fastest and slowest regions, related to lateral temperature variations
Externí odkaz:
https://doaj.org/article/6e36326334c346a180cffbc204e410e9
Publikováno v:
Geophysical Journal International. 234:2114-2127
SUMMARY Seismic tomography models reveal differences in the geographic distribution and magnitude of P- and S-wave velocity variations (VP and VS, respectively) below ∼2200 km depth in the Earth’s mantle. In particular, large low shear velocity p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5613e22cd94ed9a40a17c1e11a0f99b7
https://doi.org/10.1093/gji/ggad190
https://doi.org/10.1093/gji/ggad190
Autor:
John Hernlund, Reidar G. Trønnes, Christine Houser, Grace E. Shephard, Juan Valencia-Cardona, Renata M. Wentzcovitch
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021)
Nature Communications
Nature Communications
The two most abundant minerals in the Earth’s lower mantle are bridgmanite and ferropericlase. The bulk modulus of ferropericlase (Fp) softens as iron d-electrons transition from a high-spin to low-spin state, affecting the seismic compressional ve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e88024af52e47c23d6a53d9f0ebb6963
https://doi.org/10.1038/s41467-021-26115-z
https://doi.org/10.1038/s41467-021-26115-z
Publikováno v:
Goldschmidt2021 abstracts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9420fd1f85f5f7f8e597eb4e34310008
https://doi.org/10.7185/gold2021.5465
https://doi.org/10.7185/gold2021.5465
Publikováno v:
Planetary Diversity ISBN: 9780750321402
The loss of interior heat to space drives the internal dynamics of planetary bodies and governs long term evolution. This shapes a planet's surface environment and its prospects of habitability by dictating the rates of volcanic outgassing and recycl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a1cf0e44bab67450f5bde3a3c923143
https://doi.org/10.1088/2514-3433/abb4d9ch4
https://doi.org/10.1088/2514-3433/abb4d9ch4
Autor:
Yamei Li, Hiroyuki Kurokawa, Matthieu Laneuville, Yuka Fujii, Haruka Sakuraba, H. James Cleaves, Christine Houser, Naizhong Zhang
We model nitrogen (N) partitioning in the magma ocean stage and cycling between the surface and mantle through Earth's history, and suggest that N in the present-day mantle may be set by subduction before the development of the modern N cycle. Introd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d6868f44bd15820bc34d1b1668b79ca
https://doi.org/10.5194/epsc2020-206
https://doi.org/10.5194/epsc2020-206
The lower mantle can be grouped into high, low, and average (i.e., ambient) seismic velocity domains at each depth, based on the amplitude and polarity of wavespeed perturbations (% δlnVs, % δlnVp). Many studies focus on elucidating the thermo-chem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4013b9cfc4df458ab05984ac9215e98e
https://doi.org/10.5194/egusphere-egu2020-11806
https://doi.org/10.5194/egusphere-egu2020-11806
Publikováno v:
Earth and Planetary Science Letters. 497:149-160
The hydrogen isotopic (D/H) ratio reflects the global cycling and evolution of water on Earth as it fractionates through planetary processes. We model the water cycle taking seafloor hydrothermal alteration, chemical alteration of continental crust,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::444439d089b6bcdeb978987c537c55b1
https://doi.org/10.1016/j.epsl.2018.06.016
https://doi.org/10.1016/j.epsl.2018.06.016
Autor:
Gaurav Shukla, Renata M. Wentzcovitch, David A. Yuen, Zhongqing Wu, Christine Houser, Juan Valencia-Cardona
Publikováno v:
Geophysical Research Letters. 44:4863-4871
The iron spin crossover in ferropericlase introduces anomalies in its thermodynamics and thermoelastic properties. Here we investigate how these anomalies can affect the lower mantle geotherm using thermodynamics properties from ab initio calculation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cfdc7704ad5860832f223d485174244
https://doi.org/10.1002/2017gl073294
https://doi.org/10.1002/2017gl073294
Autor:
Christine Houser
Publikováno v:
Earth and Planetary Science Letters. 448:94-101
Knowledge of the Earth's present water content is necessary to constrain the amount of water and other volatiles the Earth acquired during its formation and the amount that is cycled back into the interior from the surface. This study compares 410 an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cab7b99a10b99bbbc2dbe74e653f95d
https://doi.org/10.1016/j.epsl.2016.04.018
https://doi.org/10.1016/j.epsl.2016.04.018