Results 131 to 140 of about 274,214 (382)
Deep Underground Science and Engineering, EarlyView.The mechanical characteristics of three different types of sandstones under high stress levels are studied. The degree of fragmentation of specimens increases with the applied stress level. The acoustic emission counting of different types of sandstones presents three stages: weakening, stabilizing, and surging.
Yujing Jiang +6 more
wiley +1 more source
Geochemistry of uranium in apatite and phosphorite [PDF]
, 1958 Z.S. Altschulter +2 more
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Deep Underground Science and Engineering, EarlyView.A 9‐year study on the deformation and stability problem of the large deep underground cavern in Baihetan power station was carried out. Abstract The big underground powerhouse cavern of the China Baihetan hydropower plant is 438 m long, 34 m wide, and 88.7 m high.
Lifang Zou +5 more
wiley +1 more source
Solid Earth Sciences, 2017 Sediment recycling has important impacts on the differentiation of the continental crust, and is considered to mainly occur in arc settings. In collisional orogenic belts, however, sediment recycling processes are comparatively less well understood.
Guo-Ning Gou +5 more
doaj +1 more source
'Genesis': A takeover from field-responsive matter? [PDF]
arXiv, 2010 Cairns-Smith (2008) has argued for a pre-Darwinian era, with a simpler basis for life's functioning via primitive "crystal genes" (information transfer, kinetic control on metabolic reactions). At the other extreme, guided by the structural similarity of clusters in early-evolved enzymes to iron-sulphide minerals like greigite, the hydrothermal mound ...
arxiv
Summary of the research work of the Trace Elements Section, Geochemistry and Petrology Branch, for the period April 1, 1948-December 31, 1950 [PDF]
, 1951 John C. Rabbitt
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Deep Underground Science and Engineering, EarlyView.This study established a true triaxial numerical model of rock mass with the discrete element method and explored the crack evolution of surrounding rock of underground roadway gas storage during cyclic loading and unloading and the damage numerical model considering residual deformation.
Zhanguo Ma +5 more
wiley +1 more source
Solid Earth Sciences, 2017 U–Pb geochronology using isotope dilution-thermal ionization mass spectrometry (ID-TIMS) is by far the most precise analytical technique. It affords the opportunity to determine 206Pb/238U dates with unprecedented precision often
Yu-Ting Zhong +5 more
doaj +1 more source
Oxygen Isotope Variations of Basaltic Lavas and Upper Mantle Rocks [PDF]
, 2001 This chapter summarizes the oxygen isotope geochemistry of terrestrial basalts and their mantle sources, including the conceptual framework for interpreting such data and the phenomenology of known variations.
Eiler, John M.
core
Mineralogy and geochemistry of a uraniferous coal from the Red Desert Area, Sweetwater County, Wyoming [PDF]
, 1953 Irving A. Breger +3 more
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