Results 91 to 100 of about 247,595 (300)

SHRIMP ion probe zircon geochronology and Sr and Nd isotope geochemistry for southern Longwood Range and Bluff Peninsula intrusive rocks of Southland, New Zealand [PDF]

, 2006
Permian–Jurassic ultramafic to felsic intrusive complexes at Bluff Peninsula and in the southern Longwood Range along the Southland coast represent a series of intraoceanic magmatic arcs with ages spanning a time interval of 110 m.y.
Aronson JL, Bignall G, Bryan WB, Challis GA, Corfu F, Devereux I, Ewart A, Graham IJ, Hanchar JM, Kroenke LW, Mossman DJ, Mutch AR, Mutch AR, Rombouts M, Wadsworth CA, Williams JG   +15 more
core   +2 more sources

Investigation on hard‐rock breaking performance and auxiliary mechanism of picks assisted with both‐sided high‐pressure water jets

Deep Underground Science and Engineering, EarlyView.
This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu, Jiancheng Xiao, Hui Zhou, Xiao Ma, Congcong Hou, Jian Cui, Fujian Yang   +6 more
wiley   +1 more source

Assessing the ability of the 14C projection-age method to constrain the circulation of the past in a 3-D ocean model [PDF]

, 2008
Radiocarbon differences between benthic and planktonic foraminifera (B-P ages) and radiocarbon projection ages are both used to determine changes of the past ocean circulation rate.
Adkins, J. F., Franke, J., Paul, A., Schulz, M.   +3 more
core   +1 more source

Generalized Matsuoka–Nakai criterion considering hydrostatic pressure dependence in the brittle–ductile region

Deep Underground Science and Engineering, EarlyView.
Three sets of strength data were selected, including hydrostatic pressure independent within the brittle region (HPI‐B), hydrostatic pressure dependent within the brittle region (HPD‐B), and hydrostatic pressure dependent within the brittle–ductile region (HPD‐BD). For HPI type, the failure envelope within the deviatoric plane remains constant.
Jiacun Liu, Junjie Xiao, Dongping Liu, Ying Xu   +3 more
wiley   +1 more source

Insights into the influences of biochar on the fate and transport of pesticides in the soil environment: a critical review

Biochar
Pesticide misuse and overuse severely pollute agricultural soils, water, and crop yields, harming people and animals. This situation raises serious concerns about environmental pollution on a global scale. As an eco-friendly material for soil remediation,
Gratien Twagirayezu, Hongguang Cheng, Yanyou Wu, Hongyu Lu, Shenglan Huang, Xin Fang, Olivier Irumva   +6 more
doaj   +1 more source

Experimental study on burning rate and flame geometry in construction tunnel fires under high geothermal conditions

Deep Underground Science and Engineering, EarlyView.
Abstract As tunnel construction advances in lengths and depths, the construction of tunnels in high geothermal environments has become increasingly common, raising significant fire risks. In this study, a 1:20 scale model tunnel test platform was constructed to investigate the effects of a high geothermal environment on fire behavior in tunnels during ...
Xiaoxian Fei, Maozhen Liu, Jiayi Ha, Linbo Du, Zhi Li, Yuhao Li, Chuangang Fan   +6 more
wiley   +1 more source

GSUE: urban geochemical mapping in Great Britain [PDF]

, 2005
The British Geological Survey is responsible for the national strategic geochemical survey of Great Britain. As part of this programme, the Geochemical Surveys of Urban Environments (GSUE) project was initiated in 1992 and to date, 21 cities have been ...
Ander, E.L., Breward, N., Brown, S.E., Fordyce, F.M., Johnson, C.C., Lister, T.R., O'Donnell, K.E., Rawlins, B.G.   +7 more
core   +2 more sources

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

Deep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski, Alessandro Verdecchia, Oliver Heidbach, Rebecca M. Harrington, David Healy   +4 more
wiley   +1 more source

New Advances, Challenges, and Illustrations in Applied Geochemistry

Applied Sciences
The Special Issue ‘New Advances and Illustrations in Applied Geochemistry in China’ was organized for the presentation of ideas from the 9th National Conference on Applied Geochemistry in China held in Chengdu, Sichuan Province, in October 2023 [...]
Qingjie Gong, Zeming Shi
doaj   +1 more source

Elution of Adsorbed n-alkanes by 5Å Molecular Sieve Using Solvent Mixtures for Compound-Specific Hydrogen Isotopic Analysis

Yankuang ceshi, 2017
The extraction procedure using solvent mixtures has been used to elute n-alkanes adsorped by 5Å molecular sieve and subsequent stable carbon isotope ratio analysis of individual n-alkanes.
CHEN Sha-sha, ZHU Xin-xu, JIA Wang-lu, YU Chi-ling, PENG Ping-an   +4 more
doaj   +1 more source