Results 91 to 100 of about 40,674 (250)

Geo-neutrinos: A systematic approach to uncertainties and correlations [PDF]

, 2006
Geo-neutrinos emitted by heat-producing elements (U, Th and K) represent a unique probe of the Earth interior. The characterization of their fluxes is subject, however, to rather large and highly correlated uncertainties.
A M Rotunno, A Palazzo, Bahcall J N Serenelli A Basu S, Bassin C, E Lisi, Eadie T, Enomoto S, Enomoto S, Fogli G L, Fogli G L Lisi E Palazzo A Rotunno A M, G L Fogli, Goreva J S, Jaupart C, Mantovani F, McDonough W F, Palme H, Rama Murthy V, Romanowicz B, Rudnick R L, Salters V, Schneider R V, Taylor S R, Wasserburg G J, Wedepohl K H   +23 more
core   +2 more sources

Emergence of Continents Stabilized the Bioavailability of Boron

Terra Nova, EarlyView.
ABSTRACT Boron is an essential element for the development of life on Earth; borates stabilize ribose in prebiotic reactions and facilitate metabolism in higher plants. There is, however, a relatively narrow surface boron concentration range over which borates stabilize and serve as a micronutrient rather than a toxin.
Brendan V. Dyck, Jon Wade
wiley   +1 more source

Hot Spring Gas Geochemistry in Western Sichuan Province, China After the Wenchuan Ms 8.0 Earthquake

Terrestrial, Atmospheric and Oceanic Sciences, 2015
The chemical components, He, Ne, and C isotropic ratios of gas samples collected thrice from 32 hot springs in western Sichuan Province, southwestern China in June and October 2008 and June 2009 were investigated in order to discuss the relationship ...
Xiaocheng Zhou, Wanchun Wang, Zhi Chen, Li Yi, Lei Liu, Chao Xie, Yuejü Cui, Jianguo Du, Jianwu Cheng, and Liming Yang   +9 more
doaj   +1 more source

Numerical models, geochemistry and the zero–paradox noble–gas mantle

Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2002
Numerical models of whole-mantle convection demonstrate that degassing of the mantle is an inefficient process, resulting in ca. 50% of the (40)Ar being degassed from the mantle system. In this sense the numerical simulations are consistent with the (40)Ar mass balance between the atmosphere and mantle reservoir.
Ballentine, C, Van Keken, P, Porcelli, D, Hauri, E   +3 more
openaire   +3 more sources

Implementation and application of adaptive mesh refinement for thermochemical mantle convection studies [PDF]

, 2011
Numerical modeling of mantle convection is challenging. Owing to the multiscale nature of mantle dynamics, high resolution is often required in localized regions, with coarser resolution being sufficient elsewhere.
Leng, Wei, Zhong, Shijie
core  

Shoshonitic enclaves in the high Sr/Y Nyemo pluton, southern Tibet: Implications for Oligocene magma mixing and the onset of extension of the southern Lhasa terrane [PDF]

, 2020
Post-collisional potassic and high Sr/Y magmatism in the Lhasa terrane provides critical constraints on the timing and mechanism of subduction of Indian lithosphere and its role in the uplift of the Tibetan Plateau.
Asimow, Paul D., Liu, Dong, Mo, Xuanxue, Sheikh, Lawangin, Wang, Qing, Wang, Zhenzhen, Zhang, Liangliang, Zhao, Zhidan, Zhu, Di-Cheng   +8 more
core  

Does depleted mantle form an intrinsic part of the Iceland plume? [PDF]

, 2003
Icelandic basalt ranges in composition from voluminous tholeiite, erupted in the rift zones, to small-volume, mildly alkaline basalt erupted off-axis.
Andrew D. Saunders, Björn S. Hardarson, Blichert-Toft, Breddam, Chauvel, Chauvel, Einarsson, Elliott, Fitton, Fitton, Furman, Gee, Hanan, Hanan, Hardarson, Hards, Hofmann, Hémond, J. Godfrey Fitton, Jakobsson, Johnson, Johnson, Kempton, Kempton, Kempton, Kerr, McDonough, Nowell, Pamela D. Kempton, Prestvik, Pálmason, Saunders, Schilling, Schilling, Skovgaard, Slater, Thirlwall, Zindler   +37 more
core   +1 more source

First Identification of Mafic Igneous Enclaves in Miocene Lavas of Southern Tibet With Implications for Indian Continental Subduction

Geophysical Research Letters, 2018
The history of Indian continental subduction beneath Asian plate remains unclear. Miocene ultrapotassic rocks in southern Tibet, with extremely enriched isotopes, have often been used to trace mantle metasomatism and geodynamic processes associated with ...
Lu‐Lu Hao, Qiang Wang, Derek A. Wyman, Yue Qi, Lin Ma, Fang Huang, Le Zhang, Xiao Ping Xia, Quan Ou   +8 more
doaj   +1 more source

Upper mantle P velocity structure beneath the Midwestern United States derived from triplicated waveforms [PDF]

, 2012
Upper mantle seismic velocity structures in both vertical and horizontal directions are key to understanding the structure and mechanics of tectonic plates.
Chu, Risheng, Helmberger, Don V., Schmandt, Brandon   +2 more
core  

Two-sided asymmetric subduction; implications for tectonomagmatic and metallogenic evolution of the Lut Block, Eastern Iran [PDF]

, 2011
West directed subduction zones show common characteristics, such as low structural elevation, deep trench, steep slab and a conjugate back-arc basin that are opposite to those of the east directed subduction zones.
Arjmandzadeh, R., Homam, S. M., Karimpour, M. H., Mazaheri, S. A., Medina, J. M., Santos, J. F.   +5 more
core   +2 more sources