Results 61 to 70 of about 7,289 (197)

Novelda Stone: widely used within the Spanish architectural heritage

Materiales de Construccion, 2002
Novelda Stone is a calcareous rock, of the biocalcarenite type. It is extracted from the «Vinalopó Medio» area (Alicante, eastern Spain). Novelda stone is known as construction material from the 13th century.
R. Fort, A. Bernabeu, M. A. García del Cura, M. C. López de Azcona, S. Ordóñez, F. Mingarro   +5 more
doaj   +1 more source

Drilling Within the Critical Zone

Hydrological Processes, Volume 40, Issue 3, March 2026.
This review synthesises 30 years of critical zone drilling methodologies for studying subsurface weathering, water storage, and biogeochemical processes. We evaluate drilling techniques, sampling strategies, downhole logging, and long‐term monitoring approaches while addressing contamination control and core preservation challenges.
Amanda Donaldson, Russell P. Callahan, W. Jesse Hahm, David N. Dralle, Anders Noren, Rachel E. Breunig, Berit M. Hudson Rasmussen, Laura V. Krone, Susan L. Brantley, A. Joshua West, Lin Ma, Clifford S. Riebe, Margaret Zimmer, Ashlee Dere, Daniella Rempe   +14 more
wiley   +1 more source

Using Generative Adversarial Networks to Translate Microresistivity Image Logs of Carbonates Into Synthetic Core Images With Accurate Dunham Textures

Journal of Geophysical Research: Machine Learning and Computation
Core images provide a high‐resolution data set of the textures and fabrics of sedimentary rocks, but their availability is often limited by cost and/or poor core recovery.
Saira Baharuddin, Cédric M. John
doaj   +1 more source

ANALYSIS OF POROSITE-NEUTRON (NPHI) LOGGING DATA FROM THE KINKASI FIELD: THE CASE OF THE G UP, F AND E HORIZONS OF THE CENOMANIAN RESERVOIR (D.R. CONGO COASTAL BASIN) [PDF]

Romanian Journal of Petroleum & Gas Technology
Since the discovery of hydrocarbon deposits in the DR Congo Coastal Basin in general, and in the Kinkasi field in particular, several development wells have been drilled with a view to optimising the economic value of the reserves evaluated.
Munene Asidi Djonive, Kanika Mayena Thomas, Manteko Matondo Emmanuel, Nsitu Nsitu Djeskin, Biduaya Ngalamulume Jeff, Bangama Kabongo Augustin   +5 more
doaj   +1 more source

Broadband Dielectric Analysis of Clays: Impact of Cation Exchange Capacity, Water Content, and Porosity

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract Clay‐rich soils and sediments are key components of near‐surface systems, influencing water retention, ion exchange, and structural stability. Their complex dielectric response under moist conditions arises from surface–ion electrostatics and diffuse double layers that govern transport and retention processes. This study explores the broadband
Felix Schmidt, Norman Wagner, Ines Mulder, Katja Emmerich, Thierry Bore, Jan Bumberger   +5 more
wiley   +1 more source

Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics

The Depositional Record
In this study, sandstones of the Lower Jurassic Datta Formation in the Salt and Trans‐Indus ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy and petrophysical ...
Salman Ahmed Khattak, Nasar Khan, Waseem Khan, S. Sahaya Jude Dhas, George Kontakiotis, Ihtisham Islam, Hammad Tariq Janjuhah, Assimina Antonarakou   +7 more
doaj   +1 more source

Classification of meteorites by petrophysical methods [PDF]

Bulletin of the Geological Society of Finland, 1983
The low field magnetic susceptibility, natural remanent magnetization (NRM) and bulk density were measured for 75 meteorite samples from 54 meteorites ranging from achondrites through chondrites and stony-irons to irons.
I.T. Kukkonen, L.J. Pesonen
doaj   +1 more source

Interconnection between parameters of rock samples electromagnetic signals and content of magnetite in the samples [PDF]

, 2015
The paper describes the results of studies of electromagnetic response parameters of samples of bearing strata and ore rocks from the Tashtagol mine on acoustic effects. Patterns of changes in amplitude-frequency parameters of electromagnetic signals for
Bespalko (Bespal'ko), Anatoly Alekseevich, Fedotov, Pavel Ivanovich, Popelyaev, A. I., Yavorovich, Ludmila Vasilievna   +3 more
core   +1 more source

On Prediction of Permeability in Sedimentary Rocks Using Geoelectrical Parameters

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Permeability prediction from geoelectrical measurements on sedimentary rocks remains a longstanding challenge due to the complex interplay between pore structure and electrical properties. This study investigates the relationship between permeability and geoelectrical parameters, particularly formation factor (F $F$) and induced polarization ...
Andreas Weller, Klaudio Peshtani, Lee Slater   +2 more
wiley   +1 more source

Borehole Logging Lithological Classification in Carbonatite‐Hosted Niobium Deposit Integrating Geophysical and Geochemical Data With Self‐Organizing Maps

Geophysical Prospecting, Volume 74, Issue 3, March 2026.
ABSTRACT Lithological classification from borehole data remains challenging in geologically complex alkaline–carbonatite systems, where compositional overlap and gradual transitions between lithotypes limit conventional interpretation methods. This study presents an integrated and automated workflow for drill‐core lithological classification using self‐
Fabrizzio R. Costa, Lívia Namie S. Nishimura, Reginaldo Antonio R. Filho, Bruno P. Milanezi, Dong Yaosong, Cleyton de C. Carneiro, Carina Ulsen   +6 more
wiley   +1 more source