U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "argillite" Remove constraint Subject: "argillite"
Start Over

Search

47  Search Results

« Previous | 1 - 20 of 47 |
Number of results to display per page

Search Results

1. Comparison of the chemo-mechanical behavior of low-pH cement exposed to calcareous water and to argillite pore water

Author:
M. Neji; A. Dauzères; A. Grellier; J. Sammaljärvi; O. Tikkanen; M. Siitari-Kauppi
Source:
Applied geochemistry 2022 v.144 pp. 105392
ISSN:
0883-2927
Subject:
argillite,   etc   ; autoradiography; cement; geochemistry; groundwater; magnesium; porosity; strength (mechanics);     Show all 8 Subjects
Abstract:
... This paper focuses on the impact of ground water on the chemo-mechanical behavior of low-pH cementitious materials. Two kinds of ground water are considered, calcareous water and argillite pore water. A sample of low-pH cement paste was immersed for two months in each solution. Chemo-mechanical characterizations (SEM, C-14 PMMA autoradiography, nano-indentation) were performed to estimate the degr ...
DOI:
10.1016/j.apgeochem.2022.105392

2. Integrating hydrogeological and second-order geo-electric indices in groundwater vulnerability mapping: A case study of alluvial environments

Author:
Nyakno Jimmy George
Source:
Applied water science 2021 v.11 no.7 pp. 123
ISSN:
2190-5487
Subject:
argillite,   etc   ; aquifers; case studies; electrodes; groundwater; hydraulic conductivity; hydraulic resistance; lithology; models; surveys; tomography; topsoil; Nigeria;     Show all 13 Subjects
Abstract:
... AVI (Aquifer vulnerability index), GOD (groundwater occurrence, overlying lithology and depth to the aquifer), GLSI (geo-electric layer susceptibility indexing) and S (longitudinal unit conductance) models were used to assess economically exploitable groundwater resource in the coastal environment of Akwa Ibom State, southern Nigeria. The models were employed in order to delineate groundwater into ...
DOI:
10.1007/s13201-021-01437-x

3. Hydro-mechanical response of crushed argillite and bentonite mixtures as sealing material

Author:
Jean-Claude Robinet; Danai Tyri; Irini Djeran-Maigre
Source:
Engineering geology 2021 v.288 pp. 106140
ISSN:
0013-7952
Subject:
argillite,   etc   ; bentonite; permeability; radioactive waste; soil fabric;     Show all 5 Subjects
Abstract:
... Mixture of excavated Callovo-Oxfordian (COx) argillite and MX80 bentonite has been proposed as potential sealing material for the French deep geological disposal facility of radioactive waste. The mixtures hydro-mechanical behaviour was studied in order to assess their response on design requirements. At the as-compacted state, soil fabric analysed by the MIP technique, showed single-modal pore di ...
DOI:
10.1016/j.enggeo.2021.106140

4. Boom Clay pore water geochemistry at the Mol site: Experimental data as determined by in situ sampling of the piezometers

Author:
Miroslav Honty; Lander Frederickx; Lian Wang; Mieke De Craen; Peter Thomas; Hugo Moors; Elke Jacops
Source:
Applied geochemistry 2022 v.136 pp. 105156
ISSN:
0883-2927
Subject:
argillite,   etc   ; clay; data collection; geochemistry; hydrochemistry; models; oxidation; pH; permeability; piezometers; radioactive waste; sea level; solubility; statistical analysis; uncertainty; Belgium;     Show all 16 Subjects
Abstract:
... In many countries, geological disposal in clay is the primary option for the final disposal of high-level radioactive waste and spent fuel. In Belgium, the Boom Clay is studied as a potential host rock for the disposal of radioactive waste. In this frame, the pore water geochemistry of the Boom Clay is an essential feature for evaluating the performance and long term safety of geological disposal ...
DOI:
10.1016/j.apgeochem.2021.105156

5. A Nonlinear Creep Damage Model Considering the Effect of Dry-Wet Cycles of Rocks on Reservoir Bank Slopes

Author:
Xingang Wang; Baoqin Lian; Wenkai Feng
Source:
Water 2020 v.12 no.9 pp. -
ISSN:
2073-4441
Subject:
argillite,   etc   ; models; water; water power;     Show all 4 Subjects
Abstract:
... Water has a crucial effect on the time-dependent behavior of rocks. The long-term cyclical fluctuations of reservoir water level lead to dry–wet (DW) cycles of rocks on reservoir bank slopes, making this influential factor more complex. To deeply understand the time-dependent behavior of rocks under DW cycles, argillite from the reservoir bank slope of Longtan Hydropower Station was used to perfor ...
DOI:
10.3390/w12092396

6. An Upper Pleistocene macroflora indicates warm and dry climate during an interglacial in central Brazil

Author:
Gabriela Luiza Pereira Pires Follador; Raquel Franco Cassino; Angélica F. Drummond C. Varajão; Jonathas S. Bittencourt
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2021 v.567 pp. 110243
ISSN:
0031-0182
Subject:
argillite,   etc   ; Pleistocene epoch; atmospheric precipitation; cerrado; data collection; dry climates; equations; fossils; humidity; landscapes; leaf area; leaves; meteorological data; monsoon season; palaeogeography; paleoclimatology; paleoecology; palynology; pollen; savannas; solar radiation; summer; temperature; Brazil;     Show all 24 Subjects
Abstract:
... This study is the first report of the fossil macroflora of the Paleolagoa Seca, an Upper Quaternary fossil locality of lacustrine origin in central Brazil. Here we present an analysis of well-preserved fossil leaves collected from an argillite level dated at ca. 43,000 cal yr BP and discuss the paleoclimatic implications of this record. We reconstructed paleotemperature and paleoprecipitation usin ...
DOI:
10.1016/j.palaeo.2021.110243

7. Investigation into water retention and gas permeability of Opalinus clay

Author:
Jiang-feng Liu; Yu Wu; Cheng-Zheng Cai; Hong-yang Ni; Xu-lou Cao; Hai Pu; Shuai-bing Song; Sheng-yan Pu; Frédéric Skoczylas
Source:
Environmental earth sciences 2018 v.77 no.5 pp. 213
ISSN:
1866-6280
Subject:
argillite,   etc   ; bentonite; clay; permeability; radioactive waste; safety assessment; Belgium; France;     Show all 8 Subjects
Abstract:
... Opalinus clay (OPA) is currently being investigated as a potential host rock for radioactive waste repository. The construction of this repository will lead to an excavation-damaged zone (EDZ) in the surrounding. Its sealing ability is crucial for the safety assessment of the geological repository. The sealing ability of OPA has a close relationship with its water retention and gas permeability be ...
DOI:
10.1007/s12665-018-7397-3

8. Assessment of groundwater potential using geophysical data: a case study in parts of Cross River State, south-eastern Nigeria

Author:
Stephen E. Ekwok; Anthony E. Akpan; Ebenezer A. Kudamnya; Ebong D. Ebong
Source:
Applied water science 2020 v.10 no.6 pp. 144
ISSN:
2190-5487
Subject:
argillite,   etc   ; aquifers; case studies; clay; data collection; geophysics; gravel; groundwater; laterites; limestone; magnetism; marl; permeability; porosity; silt; tectonics; Nigeria;     Show all 17 Subjects
Abstract:
... Groundwater potential of some parts of Cross River State, Nigeria, was assessed involving vertical electrical sounding (VES) and high-resolution aeromagnetic methods (HRAM). The VES and HRAM dataset were used to delineate the hydro-lithostratigraphic units and map the spatial distributions of geologic structures, respectively. The electro-stratigraphic sections revealed the various hydro-lithostra ...
DOI:
10.1007/s13201-020-01224-0

9. Investigating the deformation and failure characteristics of argillite consequent slope using discrete element method and Burgers model

Author:
Sih-Siao Lin; Chia-Ming Lo; Yi-Ching Lin
Source:
Environmental earth sciences 2017 v.76 no.2 pp. 81
ISSN:
1866-6280
Subject:
argillite,   etc   ; deformation; friction; mathematical models; monitoring;     Show all 5 Subjects
Abstract:
... This paper reports on the use of discrete element method to investigate the deformation and failure characteristics of an argillite consequent slope presenting signs of creeping and deformation. The proposed numerical model (based on Burgers model) takes into account the friction coefficient, bonding stiffness, and strength of the constituent materials, as well as the stiffness and strength of int ...
DOI:
10.1007/s12665-017-6401-7

10. Comparative modelling approaches of hydro-mechanical processes in sealing experiments at the Tournemire URL

Author:
A. Millard; N. Mokni; J. D. Barnichon; K. Thatcher; A. Bond; A. Fraser-Harris; C. Mc Dermott; R. Blaheta; Z. Michalec; M. Hasal; T. S. Nguyen; O. Nasir; H. Yi; O. Kolditz
Source:
Environmental earth sciences 2017 v.76 no.2 pp. 78
ISSN:
1866-6280
Subject:
argillite,   etc   ; laboratory experimentation; models; permeability; radioactive waste; waste disposal; France;     Show all 7 Subjects
Abstract:
... In this paper, a comparative modelling exercise from the DECOVALEX-2015 project is presented. The exercise is based on in situ experiments, performed at the Tournemire Underground Research Laboratory (URL), run by the IRSN (Institut de Radioprotection et de Sûreté Nucléaire), in France. These experiments aim at identifying conditions (e.g. technical specifications, design, construction, and defect ...
DOI:
10.1007/s12665-016-6324-8

11. Drainage from the Critical Zone: Lithologic Controls on the Persistence and Spatial Extent of Wetted Channels during the Summer Dry Season

Author:
S. M. Lovill; W. J. Hahm; W.E. Dietrich
Source:
Water resources research 2018 v.54 no.8 pp. 5702-5726
ISSN:
0043-1397
Subject:
argillite,   etc   ; atmospheric precipitation; base flow; bedrock; drainage; drought; dry season; gravel; groundwater; lithology; prediction; research; rivers; sandstone; summer; California;     Show all 16 Subjects
Abstract:
... In seasonally dry environments, critical zone drainage provides base flow that sustains river ecosystems. The extent of wetted channels and magnitude of base flow throughout the network, however, are rarely documented, and no general theory currently exists enabling the prediction of these key ecosystem properties. We conducted channel surveys in early and late summers of 2012, 2014, and 2015 in f ...
DOI:
10.1029/2017WR021903

12. Alteration of 29Si-doped SON68 borosilicate nuclear waste glass in the presence of near field materials

Author:
Rachid Bouakkaz; Abdesselam Abdelouas; Yassine El Mendili; Karine David; Bernd Grambow
Source:
Applied geochemistry 2019 v.111 pp. 104436
ISSN:
0883-2927
Subject:
argillite,   etc   ; apatite; calcite; calcium sulfate; clay; corrosion; geochemistry; glass; leaching; magnesium sulfate; magnetite; pyrite; radioactive waste; siderite; silicon; stainless steel;     Show all 16 Subjects
Abstract:
... The leaching of ²⁹Si-doped SON68 French nuclear waste glass was investigated in Callovo-Oxfordian (COx) water in the presence of P235GH stainless steel and COx argillite. Experiments were carried out to understand the effect of near-field materials on the rate of glass dissolution and the migration of ²⁹Si in the claystone core. Tests were performed by using percolation cells containing glass and ...
DOI:
10.1016/j.apgeochem.2019.104436

13. Coupled THMC models for bentonite in an argillite repository for nuclear waste: Illitization and its effect on swelling stress under high temperature

Author:
Liange Zheng; Jonny Rutqvist; Hao Xu; Jens T. Birkholzer
Source:
Engineering geology 2017 v.230 pp. 118-129
ISSN:
0013-7952
Subject:
argillite,   etc   ; bentonite; decision making; engineering; hydrology; mechanical properties; mineral content; radioactive waste; simulation models; temperature;     Show all 10 Subjects
Abstract:
... Subsurface manipulations such as those expected from the disposal of heat-emanating radioactive waste in deep repositories can induce strongly coupled Thermal (T), hydrological (H), mechanical (M) and chemical (C) processes. Adequate coupled THMC models are highly desirable or even indispensable for performance assessment of such repositories, for examples for the analysis of bentonite-based engin ...
DOI:
10.1016/j.enggeo.2017.10.002

14. Comparison of quantified and chart GSI for four rock masses

Author:
Robert Bertuzzi; Kurt Douglas; Garry Mostyn
Source:
Engineering geology 2016 v.202 pp. 24-35
ISSN:
0013-7952
Subject:
argillite,   etc   ; data collection; engineering; sandstone; shale; Greenland; New Zealand;     Show all 7 Subjects
Abstract:
... This paper discusses the Geological Strength Index (GSI). It provides data from four different rock masses to extend the case history offered by Hoek et al. (2013) in their paper that proposes to quantify GSI with RQD and the joint condition rating of RMR.The correlation between the GSI assessed from its chart and the quantified GSI was found to be fair for the datasets from the four rock masses; ...
DOI:
10.1016/j.enggeo.2016.01.002

15. Spatial distribution of altered minerals in the Gadag Schist Belt (GSB) of Karnataka, Southern India using hyperspectral remote sensing data

Author:
Nisha Rani; Venkata Ravibabu Mandla; Tejpal Singh
Source:
Geocarto international 2017 v.32 no.3 pp. 225-237
ISSN:
1752-0762
Subject:
argillite,   etc   ; absorption; gneiss; granite; hematite; kaolinite; muscovite; soil; spatial data; spectroradiometers; transition elements; wavelengths; weathering; India;     Show all 14 Subjects
Abstract:
... Spatial distribution of altered minerals in rocks and soils in the Gadag Schist Belt (GSB) is carried out using Hyperion data of March 2013. The entire spectral range is processed with emphasis on VNIR (0.4–1.0 μm) and SWIR regions (2.0–2.4 μm). Processing methodology includes Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes correction, minimum noise fraction transformation, spectral ...
DOI:
10.1080/10106049.2015.1132484

16. Morphogenetic features of soils in the Cat Tien National Park, southern Vietnam

Author:
O. S. Khokhlova; T. N. Myakshina; A. N. Kuznetsov; S. V. Gubin
Source:
Eurasian soil science 2017 v.50 no.2 pp. 158-175
ISSN:
1064-2293
Subject:
argillite,   etc   ; Cambisols; Fluvisols; Regosols; Umbrisols; clay; loam soils; national parks; sandy soils; tephra; topography; tropical soils; Vietnam;     Show all 13 Subjects
Abstract:
... Morphogenetic features of soils on the selected plots in the Cat Tien National Park in southern Vietnam have been studied with the use of a set of morphological, analytical, and instrumental methods. The lithological factor and topographic position play the leading role in the development of the particular genetic soil features. The soils can be subdivided into four groups according to these facto ...
DOI:
10.1134/S1064229316120085

17. A Nontectonic Origin for the Present‐Day Stress Field in the Paris Basin (France)

Author:
V. Magnenet; F. H. Cornet; C. Fond
Source:
Journal of geophysical research 2017 v.122 no.11 pp. 9313-9327
ISSN:
2169-9313
Subject:
argillite,   etc   ; basins; deformation; geophysics; gravity; limestone; research; tectonics; viscoelasticity; France;     Show all 10 Subjects
Abstract:
... The large‐scale stress patterns observed in intraplate areas are often considered to result from far‐field boundary forces that drive plate tectonics. However, no present‐day deformation has been detected in the French Paris Basin, yet significant deviatoric stresses are measured in limestone formations observed above soft argillite layers encountered in this region. Further, the pore pressure mea ...
DOI:
10.1002/2017JB014345

18. Lithologically Controlled Subsurface Critical Zone Thickness and Water Storage Capacity Determine Regional Plant Community Composition

Author:
W. Jesse Hahm; Daniella M. Rempe; David N. Dralle; Todd E. Dawson; Sky M. Lovill; Alexander B. Bryk; David L. Bish; Juergen Schieber; William E. Dietrich
Source:
Water resources research 2019 v.55 no.4 pp. 3028-3055
ISSN:
0043-1397
Subject:
argillite,   etc   ; Mediterranean climate; base flow; botanical composition; coasts; drainage; dry season; ecosystems; evergreen forests; groundwater; land use; lithology; overland flow; plant available water; rain; research; sandstone; savanna woodlands; solar energy; storms; summer; trees; water potential; water storage; California;     Show all 25 Subjects
Abstract:
... Explanations for distinct adjacent ecosystems that extend across hilly landscapes typically point to differences in climate or land use. Here we document—within a similar climate—how contrasting regional plant communities correlate with distinct underlying lithology and reveal how differences in water storage capacity in the critical zone (CZ) explain this relationship. We present observations of ...
DOI:
10.1029/2018WR023760

19. Low drilling frequency in Norian benthic assemblages from the southern Italian Alps and the role of specialized durophages during the Late Triassic

Author:
Lydia S. Tackett; Andrea Tintori
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2019 v.513 pp. 25-34
ISSN:
0031-0182
Subject:
argillite,   etc   ; Bivalvia; Cenozoic era; Gastropoda; Late Cretaceous epoch; Triassic period; arthropods; basins; benthic organisms; databases; diagenesis; drilling; fossils; limestone; paleoecology; predation; predators; reptiles; shale; sharks; Alps region; Italy;     Show all 22 Subjects
Abstract:
... Drillholes represent one of the clearest lines of evidence for predation of benthic invertebrates in the fossil record and are frequently used as a primary proxy for predation intensity in the fossil record. Drillholes are abundant in the late Cretaceous and Cenozoic, but their occurrence is patchy in older deposits of the Mesozoic. The inconsistent record of drillholes in pre-Cretaceous deposits ...
DOI:
10.1016/j.palaeo.2018.06.034

20. Stone pipe-making tools in ancient North America

Author:
P.B. MacLaren Law de Lauriston; George H. Odell; Timothy Lambert-Law de Lauriston
Source:
Journal of archaeological science 2015 v.57 pp. 32-41
ISSN:
0305-4403
Subject:
argillite,   etc   ; archaeology; manufacturing; models; pipes; raw materials; North America;     Show all 7 Subjects
Abstract:
... Several types of smoking pipes have been manufactured and used throughout later prehistoric and historic times around the world. Although substantial information exists on the styles of these pipes, little is known about their methods of manufacture or the types of sites on which they were made. This study focuses on testing a postulated model of pipe manufacture through the experimental replicati ...
DOI:
10.1016/j.jas.2015.02.014