Results 51 to 60 of about 12,456 (161)

Lithofacies identification of shale formation based on mineral content regression using LightGBM algorithm: A case study in the Luzhou block, South Sichuan Basin, China

Energy Science & Engineering, 2023
Lithofacies form the basis for evaluating shale gas fields and play an important role in gas reservoir enrichment. The accurate identification of shale lithofacies is key for exploration and development. Based on well‐logged data, the accuracy of mineral
Yi Liu, Runhua Zhu, Shuo Zhai, Na Li, Chengyong Li   +4 more
doaj   +1 more source

Mercury cycling during the last glacial period in Arctic Lake El'gygytgyn, NE Russia

Journal of Quaternary Science, EarlyView.
ABSTRACT Tectonic processes play a key role in the global mercury (Hg) cycle on geological timescales, by mobilising Hg from deep Earth reservoirs to the surface. These natural fluxes also introduce a dynamic component to the terrestrial Hg cycle that can interact with other environmental signals and influence Hg delivery to sedimentary records.
Alice R. Paine, Joost Frieling, Bernd Wagner, Martin Melles, Volker Wennrich, Tamsin A. Mather, Stuart A. Robinson, David M. Pyle   +7 more
wiley   +1 more source

Supporting codes and outputs to identify a type of lithofacies from rock-core digital photographs and to classify the lithofacies from well-log data

, 2019
This repository contains the codes used in the study “Interpreting the Subsurface Lithofacies at High Lithological Resolution by Integrating Information from Well-log Data and Rock-core Digital Photographs”. The codes are used to identify the lithofacies
Pervukhina, Marina, Park, Eungyu, Yun, Seong-Taek, Emelyanova, Irina, Jeong, Jina, Esteban, Lionel   +5 more
core   +1 more source

Mortars From Punic and Hellenistic–Roman Solunto: Materials, Formulations, and Technology

Archaeometry, EarlyView.
ABSTRACT This study presents an archaeometric investigation of 18 hydraulic rendering and bedding mortars from Punic and Hellenistic–Roman Solunto (NW Sicily). The research aimed to characterize raw materials, reconstruct manufacturing sequences, and evaluate technological proficiency through mineralogical and petrochemical analyses.
G. Montana, G. Polizzi, C. Portale, M. Gasparo Morticelli, L. Randazzo   +4 more
wiley   +1 more source

Supporting codes, data, and outputs to identify a type of lithofacies from rock-core digital photographs and to classify the lithofacies from well-log data

, 2020
This repository contains the codes and the data used in the study “Interpreting the Subsurface Lithofacies at High Lithological Resolution by Integrating Information from Well-log Data and Rock-core Digital Photographs”.
Pervukhina, Marina, Esteban, Lionel (8331321), Yun, Seong-Taek (8331324), Park, Eungyu, Yun, Seong-Taek, Emelyanova, Irina (8331315), Pervukhina, Marina (8331318), Park, Eungyu (8331312), Emelyanova, Irina, Jeong, Jina, Jeong, Jina (8331309), Esteban, Lionel   +11 more
core   +1 more source

Neural Networks and Multivariate Analysis Based on Geochemical Data to Determine Stone Provenance From Ancient Calabrian Quarries (Southern Italy)

Archaeometry, EarlyView.
ABSTRACT This study shows an innovative approach to determine the origin of some Calabrian rocks quarried used in ancient times. Twenty‐five quarries, distributed in all the Calabrian provinces (Southern Italy), were studied and sampled. Ten samples were taken from each quarry, for a total of 250 samples.
Domenico Miriello, Stefano Columbu, Raffaella De Luca, Marco Lezzerini, Mirco Taranto, Fabrizio Antonelli   +5 more
wiley   +1 more source

Lithofacies Classification Using Supervised and Semi-Supervised Machine Learning Approach [PDF]

, 2021
The machine learning approach can help Geoscientists do their work in well log analysis to developing the oil and gas field. Prediction categorical or numerical response variable using a set of predictor variables supervises and semi-supervises learning ...
Hardanto, Lilik T.; Department of Computer Science, Binus University, Jakarta, 11530, Indonesia, Wulandhari, Lili Ayu; Department of Computer Science, Binus University, Jakarta, 11530, Indonesia   +1 more
core   +1 more source

Refining the timing of Middle Pleistocene (MIS 12 to MIS 6) ice advances into northern central Europe: sedimentological analysis and single‐grain luminescence dating of glaciotectonic complexes and tunnel‐valley fills

Boreas, EarlyView.
We summarize the current state of knowledge on the age of the Middle Pleistocene ice advances into northern central Europe and provide 25 new single‐grain feldspar luminescence ages of Elsterian and Saalian glacigenic sediments to constrain the age of the ice advances and their tentative correlation with marine isotope stages/substages.
Niklas von Soest, Neda Rahimzadeh, Debra Colarossi, Falko Malis, Tobias Lauer, Wera Sander‐Beuermann, Yvonne Spychala, Christian Brandes, Runa Fälber, Sumiko Tsukamoto, Jutta Winsemann   +10 more
wiley   +1 more source

Depositional processes of varved sediments from proglacial Lago Frías since 1800 CE (North Patagonian Andes, Argentina)

Boreas, EarlyView.
The glacierized Valle Frías in Northern Patagonia is one of the best‐studied valleys in South America and includes varved sediments from Lago Frías. We complement this lacustrine record with a high‐resolution documentation of varve counts and their composition.
Bernd Zolitschka, Philipp Böning, A. Catalina Gebhardt, M. Alicia Irurzun, Wojciech Tylmann, Christoph Vogt, Claudia S. G. Gogorza   +6 more
wiley   +1 more source

Stratigraphy and reserves of pumiceous sand deposits in Perry's 'Asparagus Block' at Horotiu [PDF]

, 1997
The stratigraphic relationships between the deposits of the Hinuera Formation and the Taupo Pumice Alluvium are described over a 16 ha plot of land known as the 'Asparagus Block' at Horotiu. The Hinuera Formation is exposed at the surface at the southern
Nelson, Campbell S., Lowe, David J., Lootsma, A   +2 more
core