Results 131 to 140 of about 776,982 (368)

A study of ignimbrites in the Cordilleran region as a basis for interpretation of lunar plains [PDF]

Progress in a study of lunar topography and geology by analyzing and mapping the earth's mantle is presented. Data from the study are used for the construction of a 600 page lunar topographic atlas.
Clabaugh, S. E.
core   +1 more source

Regional study of the Archean to Proterozoic crust at the Sudbury Neutrino Observatory (SNO+), Ontario: Predicting the geoneutrino flux

, 2014
The SNO+ detector, a new kiloton scale liquid scintillator detector capable of recording geoneutrino events, will define the strength of the Earth radiogenic heat.
Huang, Yu, Mantovani, Fabio, McDonough, William F., Rudnick, Roberta L., Shirey, Steven B., Strati, Virginia   +5 more
core   +1 more source

Unsolved problems in the lowermost mantle [PDF]

, 2006
Many characteristics of D '' layer may be attributed to the recently discovered MgSiO3 post-perovskite phase without chemical heterogeneities. They include a sharp discontinuity at the top of D '', regional variation in seismic anisotropy, and a steep ...
Brodholt, JP, Cormier, VF, Hirose, K, Karato, S, Yuen, DA   +4 more
core   +1 more source

The lithospheric mantle and lower crust-mantle relationships under Scotland: a xenolithic perspective [PDF]

, 2011
In the British Isles the majority of volcanic rocks containing upper mantle and lower crustal xenoliths occur in Scotland. Most of the occurrences are of Carboniferous–Permian age.
Arai, B.G.J. Upton, Bonadiman, C. Bonadiman, Greenbaum, Griffin, H. Downes, Irving, Johnson, Kirstein, L.A. Kirstein, Larsen, Macdonald, McDonough, Menzies, P.G. Hill, Singh, T. Ntaflos   +17 more
core   +1 more source

In Situ Boron Isotope Determination in Amphibole by LA‐MC‐ICP‐MS: Matrix Effects and New Potential Reference Materials

Geostandards and Geoanalytical Research, EarlyView.
Key Points An analytical strategy for determining boron isotope ratios in Ca‐amphiboles using LA‐MC‐ICP‐MS is presented. Accurate δ11B results can be achieved using the USGS BHVO‐2G glass as the calibrating reference material. Two proposed Ca‐amphibole RMs exhibit good homogeneity with δ11B intermediate measurement precision of 2.86‰ and 3.96 (2s). The
Enrico Cannaò, Gianluca Sessa, Samuele Agostini, Massimo Tiepolo   +3 more
wiley   +1 more source

Geology, environment, and life in the deepest part of the world’s oceans

The Innovation, 2021
Summary: The hadal zone, mostly comprising of deep trenches and constituting of the deepest part of the world’s oceans, represents the least explored habitat but one of the last frontiers on our planet.
Mengran Du, Xiaotong Peng, Haibin Zhang, Cong Ye, Shamik Dasgupta, Jiwei Li, Jiangtao Li, Shuangquan Liu, Hengchao Xu, Chuanxu Chen, Hongmei Jing, Hongzhou Xu, Jun Liu, Shunping He, Lisheng He, Shanya Cai, Shun Chen, Kaiwen Ta   +17 more
doaj  

Mineralogy and composition of the oceanic mantle

, 2011
s A851. Matzen, A. K., Bajer, M. B., Beckett, J. R. & Stolper, E. M. (2011). Fe^Mg partitioning between olivine and high-magnesian melts and the nature of Hawaiian parental liquids. Journal of Petrology (in press). McDonough,W. F. & Sun, S-s. (1995). The
K. Putirka, F. Ryerson, M. Perfit, W. Ridley   +3 more
semanticscholar   +1 more source

A review of volatiles in the Martian interior [PDF]

, 2016
Multiple observations from missions to Mars have revealed compelling evidence for a volatile-rich Martian crust. A leading theory contends that eruption of basaltic magmas was the ultimate mechanism of transfer of volatiles from the mantle toward the ...
Baratoux, David, Beaty, David, Breuer, Doris, Farcy, Benjamin J., Filiberto, Justin, Grott, Matthias, Jones, John H., Kiefer, Walter S., Mane, Prajkta, McCubbin, Francis M., Schwenzer, Susanne P.   +10 more
core   +1 more source

Modeling pN2 through Geological Time: Implications for Planetary Climates and Atmospheric Biosignatures [PDF]

, 2016
Nitrogen is a major nutrient for all life on Earth and could plausibly play a similar role in extraterrestrial biospheres. The major reservoir of nitrogen at Earth's surface is atmospheric N2, but recent studies have proposed that the size of this ...
Buick, R., Johnson, B., Kipp, M. A., Koehler, M. C., Schwieterman, E. W., Stüeken, E. E.   +5 more
core   +2 more sources

A Cautionary Tale About Not ‘Joining the Dots’ to Infer Anticlockwise P$$ P $$‐T$$ T $$ Paths

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Uncertainty surrounds the cause and interpretation of anticlockwise pressure‐temperature (P$$ P $$–T$$ T $$) paths in metamorphic terranes. Here, we focus on the viability of a commonly proposed mechanism—magmatic heat transfer during thickening—using a case study of the Roineabhal terrane in Scotland, where such an anticlockwise P$$ P $$–T ...
Owen Weller, Joseph Benson, Alex Copley
wiley   +1 more source