Results 41 to 50 of about 861 (183)

Characterization analyzes in the geomechanical behavior of travertine rock

SN Applied Sciences, 2023
There is a fundamental interest in studying travertine rocks, and this is to understand their structure, their geomechanical behavior and other particularities in order to guarantee their proper use in different engineering and architectural applications,
Carlos Alberto Luza Huillca, Hugo Guillermo Jiménez Pacheco, Lilia Mary Miranda Ramos, Pavel Kewin Delgado Sarmiento, Victor Ludgardo Alvarez Tohalino, Héctor Enrique Terrones Diaz, Euripedes do Amaral Vargas   +6 more
doaj   +1 more source

Analysis of a travertine system controlled by the transpressional activity of the Alhama de Murcia fault: The Carraclaca site, eastern Betic Cordillera, Spain

Frontiers in Earth Science, 2023
Continental carbonates, such as travertines and tufas, formed from CO2-rich groundwater degassing as it emerges at the Earth’s surface, are often associated with major crustal-scale faults.
Carolina Canora, Jaime Cuevas Rodríguez, José Jesús Martínez Díaz, José Jesús Martínez Díaz, Antonio Garralón   +4 more
doaj   +1 more source

Spherulite in the modern aragonitic travertine stromatolite has a calcite core with exopolymers

Sedimentology, Volume 73, Issue 5, Page 1421-1434, August 2026.
ABSTRACT Spherulites are spherical to ellipsoidal particles formed by various crystalline substances and can be abiotically synthesised in the laboratory. Among various spherulite types, spherulites composed of calcium carbonate are also found in various natural environments, but their abiotic or biotic origins are still controversial.
Fumito Shiraishi, Takayuki Akimoto, Naotaka Tomioka, Satoko Motai, Yoshio Takahashi   +4 more
wiley   +1 more source

Active Hydrothermal Hydrogen Emissions in Continental Collision Settings: Insights From the Southeastern Tibetan Plateau

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract Natural hydrogen (H2) is a promising clean energy resource and a significant component of geothermal gases, yet its origins and release mechanisms remain poorly constrained. Here, we present geochemical and isotopic data (CO2, N2, Ar, H2, He, CH4, 3He/4He, δ13C‐CO2, and δ13C‐CH4) for hydrothermal gases from the Changning–Menglian suture (CMS),
Xuelian Huang, Xiaocheng Zhou, Jiao Tian, Yuwen Wang, Bingyu Yao, Zhaojun Zeng, Shuai Wang, Han Yan, Ruibin Li, Yingling Han, Yuxing Ren   +10 more
wiley   +1 more source

Petrography and U/Th dating of travertine deposits in Bongongo (Cameroon volcanic line): Implication for paleoclimate, hydrothermalism and tectonism

Solid Earth Sciences
The studied travertine deposits have been analysed using sedimentology, petrography and geochronology to evaluate their resurgence variation, Neotectonic reconstruction, hydrothermal/paleohydrology, and tectonic influence for their precipitation.
Bisse Salomon Bertrant, Bokanda Ekoko Eric, Florence Njinto Kwankam, Ashukem Ethel Nkongho, Nfor Ngwakfu Shannon, Adama Amaya, Ekomane Emile   +6 more
doaj   +1 more source

New Terrestrial Native Iron Discovered on Earth's Surface

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract Native iron is a major common mineral in lunar samples and meteorites but rarely occurs on Earth's surface, as its stability requires highly reducing conditions with very low oxygen fugacity. To date, native iron has mainly been found in basalts, ophiolites, and deep hydrothermal systems.
Tingwei Zhang, Shuhui Cai, Zhipeng Zeng, Youqian Li, Shixia Yang, Chenglong Deng   +5 more
wiley   +1 more source

An investigation on the suitability of hydrated building lime from travertine limestone outcrop of Bogongo, South West of Cameroon

Case Studies in Construction Materials, 2020
In the present study, physico-chemical investigations were carried out on hydrated lime produced from the limestone of the travertine outcrop of Bogongo in the South West Region of Cameroon.
Ndigui Billong, Likiby Boubakar, B.N. Bayiha, S.M. Njimbouombouo, Uphie C. Melo, Jonathan Oti, John Kinuthia   +6 more
doaj   +1 more source

Structural Evolution of a Polyphase Salt‐Tectonic System From Syn‐Rift Extension to Syn‐Orogenic Deformation in the Middle Atlas (Oum Er Rbia Region, Morocco)

Tectonics, Volume 45, Issue 7, July 2026.
Abstract Salt tectonics has received little attention in the Middle Atlas, despite the widespread occurrence of Triassic evaporites and their potential to exert first‐order control on basin architecture and deformation. This study presents the first integrated analysis of polyphase salt tectonics in the Middle Atlas, focusing on the Oum Er‐Rbia sector,
N. Saspiturry, G. Ballas, M. El Ghorfi, S. Echat, B. Viguier, N. Patris, A. Rhoujjati, N. Rhoujjati, A. Charbaoui, L. Hanich, V. Léonardi   +10 more
wiley   +1 more source

A New Occurrence of Terrestrial Native Iron in the Earth’s Surface: The Ilia Thermogenic Travertine Case, Northwestern Euboea, Greece

Geosciences, 2018
Native iron has been identified in an active thermogenic travertine deposit, located at Ilia area (Euboea Island, Greece). The deposit is forming around a hot spring, which is part of a large active metallogenetic hydrothermal system depositing ore ...
Christos Kanellopoulos, Eugenia Valsami-Jones, Panagiotis Voudouris, Christina Stouraiti, Robert Moritz, Constantinos Mavrogonatos, Panagiotis Mitropoulos   +6 more
doaj   +1 more source

Bio‐mediated cementation of supratidal beach sediments associated with groundwater springs

Sedimentology, Volume 73, Issue 4, Page 1271-1285, June 2026.
ABSTRACT The formation of beachrock, sensu stricto, via carbonate precipitation in the intertidal zone is widespread throughout the tropics and subtropics. While cementation of supratidal beach sediments has also been noted in several locations, it has received much less attention.
Thomas William Garner, J. Andrew G. Cooper   +1 more
wiley   +1 more source