Results 31 to 40 of about 8,773 (164)
Abundance and Partitioning of OH in a High-pressure Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa [PDF]
, 2004 Concentrations of OH, and major and trace elements were determined in a suite of mantle-derived megacrysts that represent the crystallization products of a kimberlite-like magma at ~5 GPa and ~1400–1100°C.
Bell, David R. +2 more
core +1 more source
Elevated temperature effects on swelling pressure of compacted bentonite
Deep Underground Science and Engineering, EarlyView.We present a set of new experimental investigations on the effects of elevated temperature on the swelling pressure development of compacted bentonite. This research was motivated by an emerging interest in using bentonite as a plug material in oil and gas well abandonment.
Linhua He +4 more
wiley +1 more source
, 2015 We comprehensively compile and review N content in geologic materials to calculate a new N budget for Earth. Using analyses of rocks and minerals in conjunction with N-Ar geochemistry demonstrates that the Bulk Silicate Earth (BSE) contains \sim7\pm4 ...
Goldblatt, Colin, Johnson, Ben
core +1 more source
UV-light-driven prebiotic synthesis of iron–sulfur clusters [PDF]
, 2017 Iron–sulfur clusters are ancient cofactors that play a fundamental role in metabolism and may have impacted the prebiotic chemistry that led to life.
Bonfio, Claudia +13 more
core +1 more source
Deep Underground Science and Engineering, EarlyView.Upon conceptualization of structural behavior, foundations in terms of their form are divided into linear (1D), planar (2D), and volumetric (3D). Regarding the load transfer mechanisms, linear foundation systems are considered vector‐acting, planar foundations are divided into section and surface‐acting, and volumetric ones are recognized as block ...
Abolfazl Eslami +4 more
wiley +1 more source
The FOREGS Geochemistry Task Group 1994-1996 [PDF]
, 1996 The Forum of European Geological Surveys (FOREGS) includes geological surveys from 33 European countries and is responsible for co-ordinating geological survey activities in Europe. The FOREGS Geochemistry Task Group was established in 1994 as part of
Fordyce, F.M. +5 more
core
Primary crustal melt compositions: Insights into the controls, mechanisms and timing of generation from kinetics experiments and melt inclusions [PDF]
, 2017 We explore the controls, mechanisms and timing of generation of primary melts and their compositions, and show that the novel studies of melt inclusions in migmatites can provide important insights into the processes of crustal anatexis of a particular ...
Acosta-Vigil, Antonio +6 more
core +1 more source
Data‐driven analysis of the spatial dependence of grouting efficiency during tunnel excavation
Deep Underground Science and Engineering, EarlyView.Prediction of grouting efficiency using machine learning is enhanced by adopting a training strategy that accounts for the grouting process across multiple rounds. Abstract Grouting with water–cement mixtures is the most widely used and cost‐effective method for managing excess water inflow during tunnel construction.
Huaxin Liu, Xunchang Fei, Wei Wu
wiley +1 more source
Normal background concentrations (NBCs) of contaminants in English soils : final project report [PDF]
, 2012 The British Geological Survey (BGS) has been commissioned by the Department for Environment, Food and Rural Affairs (Defra) to give guidance on what are normal levels of contaminants in English soils in support of the Part 2A Contaminated Land Statutory ...
Ander, E.L. +3 more
core
A petrological assessment of diamond as a recorder of the mantle nitrogen cycle [PDF]
, 2016 During part of this study, SM was employed at Bristol on NERC grant NE/J008583/1 to Michael J Walter. DH is funded by a DAAD PRIME fellowship. SM is grateful to the Deep Carbon Observatory for funding the fortnightly ‘Deep Carbon’ meeting at the Carnegie
Howell, Daniel, Mikhail, Sami
core +1 more source