Heterogeneous Accretion and the Moderately Volatile Element Budget of Earth

Science ◽  
2010 ◽  
Vol 328 (5980) ◽  
pp. 884-887 ◽  
Author(s):  
M. Schonbachler ◽  
R. W. Carlson ◽  
M. F. Horan ◽  
T. D. Mock ◽  
E. H. Hauri
Keyword(s):  
Volatile Element ◽  
Element Budget

scholarly journals Mercury in some arc crustal rocks and mantle peridotites and relevance to the moderately volatile element budget of the Earth

2015 ◽  
Vol 396 ◽  
pp. 134-142 ◽  
Author(s):  
Dante Canil ◽  
Peter W. Crockford ◽  
Ricardo Rossin ◽  
Kevin Telmer
Keyword(s):  
Volatile Element ◽  
Crustal Rocks ◽  
The Earth ◽  
Mantle Peridotites ◽  
Element Budget

The role of sulfides in the chalcophile and siderophile element budget of the subducted oceanic crust

2021 ◽  
Author(s):  
Jesse B. Walters ◽  
Alicia M. Cruz-Uribe ◽  
Horst R. Marschall ◽  
Brandon Boucher
Keyword(s):  
Oceanic Crust ◽  
Subducted Oceanic Crust ◽  
Element Budget

Effects of fluid boiling on Au and volatile element enrichment in submarine arc-related hydrothermal systems

2021 ◽  
Author(s):  
Jan J. Falkenberg ◽  
Manuel Keith ◽  
Karsten M. Haase ◽  
Wolfgang Bach ◽  
Reiner Klemd ◽  
...  
Keyword(s):  
Hydrothermal Systems ◽  
Volatile Element ◽  
Element Enrichment

Highly volatile element (H, C, F, Cl, S) abundances and H isotopic compositions in chondrules from carbonaceous and ordinary chondrites

2021 ◽  
Author(s):  
Kei Shimizu ◽  
Conel M. O'D. Alexander ◽  
Erik H. Hauri ◽  
Adam R. Sarafian ◽  
Larry R. Nittler ◽  
...  
Keyword(s):  
Ordinary Chondrites ◽  
Volatile Element ◽  
Isotopic Compositions

Evidence for contemporaneous Deccan volcanic aerosol deposition preceding the K-Pg boundary at El Kef, Tunisia

2021 ◽  
Author(s):  
Steffanie Sillitoe-Kukas ◽  
Munir Humayun ◽  
Thierry Adatte ◽  
Gerta Keller
Keyword(s):  
Continental Crust ◽  
Aerosol Deposition ◽  
Emission Rates ◽  
Volcanic Aerosol ◽  
Deccan Volcanism ◽  
Volatile Element ◽  
Asteroid Impact ◽  
Upper Continental Crust ◽  
El Kef ◽  
Volcanic Aerosols

<p>The cause of the Cretaceous-Paleogene extinction remains debated between an asteroid impact and volcanism. Precise geochronology showed that the extinction coincided with a voluminous phase (Poladpur eruption) of Deccan volcanism (Schoene et al., 2019). Paleontological evidence indicates that microfossil diversity declined about 300,000 years before the K-Pg boundary, synchronous with the onset of Deccan volcanism (Keller et al. 2009). High concentrations of Ir in the K-Pg boundary supported the asteroid hypothesis but recent work indicates that siderophile accumulation at the K-Pg in El Kef is secondary (Humayun et al., this conf.). Here, we critically examine existing element data for the K-Pg boundary and examine new results at the El Kef site, Tunisia, for volcanogenic volatile element accumulation associated with the contemporaneous Deccan eruptions. In this study, we analyzed 60 elements by laser ablation ICP-MS in search of these volcanic aerosol enrichments in the K-Pg sediments at El Kef, Tunisia. A study of siderophile element distribution at global K-Pg sites found that the Ru/Ir ratio is sub-chondritic. Mixing of upper continental crust (Ru/Ir> CI) with a chondritic impactor fails to explain this trend. Volcanic aerosol emissions for Ir are well known but there is less data available for Ru. Relative emission rates of Ru were found to be lower than those of Ir for the Kudryavy volcano (Yudovskaya et al., 2008), so a possible explanation of the sub-chondritic Ru/Ir ratio observed in global K-Pg sites involves deposition of volcanic aerosols in sediments. We also modeled the effect of adding volcanic aerosols to sediments approximated compositionally as upper continental crust (UCC) to find that Re, Cd, Os and Ir are the first elements to become enriched in sediments by volcanogenic aerosol deposition. Sediments from El Kef below the K-Pg boundary are enriched in both Re and Cd. On a plot of Cd vs. Re, the K-Pg sediment from El Kef falls on a mixing line between volcanic aerosol (Erta Ale volcano) and UCC. Sediment at 3 cm above the K-Pg boundary has little enrichment of either Cd or Re, interpreted here to indicate that this sediment was deposited in the interlude between the Poladpur and the Ambenali eruption phases of the Deccan. The availability of chemical proxies of volcanogenic aerosol deposition in sediments enables direct correlation between fossil evidence and the contemporaneous intensity of volcanic outgassing, the likely destroyer of life by the Deccan eruptions (Keller et al., 2020).</p>

Venus: Halide Cloud Condensation and Volatile Element Inventories

Science ◽  
1982 ◽  
Vol 216 (4551) ◽  
pp. 1223-1225 ◽  
Author(s):  
J. S. LEWIS ◽  
B. FEGLEY
Keyword(s):  
Volatile Element

Volatile element chemistry in the solar nebula: Na, K, F, Cl, Br, and P

Icarus ◽  
1980 ◽  
Vol 41 (3) ◽  
pp. 439-455 ◽  
Author(s):  
Bruce Fegley ◽  
John S. Lewis
Keyword(s):  
Solar Nebula ◽  
Volatile Element ◽  
Element Chemistry

Thermal Metamorphism of Primitive Meteorites—XII. The Enstatite Chondrites Revisited

2005 ◽  
Vol 2 (3) ◽  
pp. 215 ◽  
Author(s):  
Ming-Sheng Wang ◽  
Michael E. Lipschutz
Keyword(s):  
Radiochemical Neutron Activation Analysis ◽  
Parent Material ◽  
Ordinary Chondrites ◽  
Terrestrial Environment ◽  
Volatile Element ◽  
Thermal Metamorphism ◽  
Report Data ◽  
Element Contents ◽  
Type 3 ◽  
Solid Bodies

Environmental Context.The first Solar System material condensed 4.567 billion years ago, rapidly forming planetesimals—solid bodies that might combine to form planets (accretion) or survive as asteroidal meteorites. Earth’s main accretion ended within the next 30 million years, but subsequent high temperatures essentially erased evidence of this history. However, heating in these early episodes produced effects uniquely recorded by 14 volatile trace elements. The volatile element composition of chondritic meteorites, whose parent material formed closest to Earth, may thus provide important information about early planetesimal evolution. Abstract.We report data for 14 trace and ultratrace elements—Au, Co, Sb, Ga, Rb, Ag, Cs, Te, Zn, Cd, Bi, Tl, In (ordered by increasing putative nebular volatility)—in 13 enstatite (E) chondrites recovered from Antarctica and two E inclusions in the Kaidun polymict breccia that fell in 1980. These data, determined by radiochemical neutron activation analysis (RNAA), essentially double the amount of information known for E chondrites, whose parent materials formed closest to the Sun in the chondrite-forming nebular region. We discuss here the data for all 29 samples studied. The meteoritic suite studied here includes both representatives of previously rare types—like high-iron EH3 and EH5 individuals—but also unique individuals and previously unknown low-iron, EL3, chondrites. Prior hypothetical assertions by others are corrected by the new data. Volatile element contents of EL3 and EH3 chondrites are variable, but comparable, like those of type 3 ordinary chondrites (i.e. H3, L3, and LL3). Volatile element contents of EH4 chondrites are at least as high as those of the E3 types, in contrast to the lower contents of H4, L4, and LL4 types. Compositionally, E3,4 chondrites reflect only nebular condensation and/or accretion processes. Volatiles in E5 and E6 chondrites—whether of EH, EL or unique ones—are depleted relative to cosmic (i.e. CI1) or E3,4 chondrite abundances. The evidence indicates that E5,6 chondrites compositionally reflect vaporization and loss of volatiles during open-system, thermal metamorphism of their parent(s); this may have been the terrestrial environment during Earth’s formation from early planetesimals. Compositional differences between Antarctic E5,6 chondrites and contemporary falls probably do not reflect weathering during the long residence of these chondrites in Antarctica. They might reflect differences in the starting compositions and/or metamorphic conditions in the parent(s).

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