Results 41 to 50 of about 1,867 (153)

Alteration of Feldspar‐Rich Rocks on Ancient Mars and Its Possible Link to Ca/Fe‐Rich Carbonates

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Feldspar‐rich rocks have increasingly been discovered on the martian surface. They may have been an important part of the ancient martian crust and may be related to Ca/Fe‐rich carbonates (one of two types of carbonates on Mars and the other being Mg‐rich carbonates), but compared to mafic rocks, their interaction with water on ancient Mars is
C. Wang, T. Usui, M. Melwani Daswani
wiley   +1 more source

Mineral chemistry of clinopyroxene and feldspars in the Neoproterozoic alkaline dykes of the Bangalore District, Karnataka, India [PDF]

Bulletin of the Geological Society of Finland, 1993
The unmetamorphosed Neoproterozoic dykes of the continental intraplate alkaline magmatism studied in Southern Karnataka consist of analcime-tinguaites, tinguaites, bostonites and solvsbergites.
H.T. Makkonen, K. Laajoki, T.C. Devaraju
doaj   +1 more source

Advanced Hyperspectral Analysis of Sediment Core Samples from the Chew Bahir Basin, Ethiopian Rift, in the Spectral Range from 0.25 to 17 µm: Support for Climate Proxy Interpretation

Frontiers in Earth Science, 2021
Establishing robust environmental proxies at newly investigated terrestrial sedimentary archives is a challenge, because straightforward climate reconstructions can be hampered by the complex relationship between climate parameters and sediment ...
Gabriele E. Arnold, Gabriele E. Arnold, Verena Foerster, Martin H. Trauth, Henry Lamb, Henry Lamb, Frank Schaebitz, Asfawossen Asrat, Asfawossen Asrat, Claudia Szczech, Claudia Szczech, Christina Günter   +11 more
doaj   +1 more source

Investigating Technology and Raw Materials Source of the Archaic and Classical Architectural Terracottas From the Athenaion in Castro (Apulia, Italy)

Archaeometry, Volume 68, Issue 3, Page 512-526, June 2026.
ABSTRACT Since 2000, archaeological excavations have brought to light the sanctuary of Athena in Castro (Apulia, Italy), including terracotta roofs dated between the 6th and 4th centuries bce. Based on their morphological and stylistic features, it is suggested that the terracotta items were manufactured in the Greek colony of Taras (modern Taranto ...
M. M. N. Franceschini, T. Ismaelli, S. Vettori, L. Chelazzi, S. Ciattini, F. Di Benedetto, C. Grifa, E. Cantisani   +7 more
wiley   +1 more source

Volcanic History of Rodrigues Island and Its Relationship With the Central Indian Ridge and the Réunion Hotspot

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Many intraplate volcanic chains are explained as hotspot trails formed by plate motion over mantle plumes, yet some deviate from this model. The Rodrigues Ridge, a volcanic lineament extending eastward from the Réunion hotspot track toward the Central Indian Ridge (CIR), is one such case.
Julien Seghi, Vincent Famin, Xavier Quidelleur, Loraine Gourbet, Martin Danišík, Axel K. Schmitt, François Nauret, Sidonie Revillon, Maëlis Arnould, Laurent Michon, Reshad Jhangeer‐Khan   +10 more
wiley   +1 more source

X‐ray computed tomography study of terrestrial analog cores in preparation for Mars sample return

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 405-426, March 2026.
Abstract Mars Sample Return (MSR) is expected to transform planetary science by providing unprecedented access to pristine Martian material. Initial characterization in the sample receiving facility (SRF) will rely on nondestructive techniques such as X‐ray computed tomography (XCT) to document the condition, distribution, and internal features of ...
Sophie Benaroya, Christopher D. K. Herd, David T. Flannery, Nicolas Randazzo   +3 more
wiley   +1 more source

Données pétrographiques sur les basanites à analcime

, 1965
L'étude des basanites à analcime connues dans le monde, montre qu'il s'agit d'un groupe pétrographique particulier tant par ses caractères minéralogiques que chimiques.
Girod, Michel
core   +1 more source

Facile fabrication of novel analcime/sodium aluminum silicate hydrate and zeolite Y/faujasite mesoporous nanocomposites for efficient removal of Cu(II) and Pb(II) ions from aqueous media

Journal of Materials Research and Technology, 2020
In this work, novel mesoporous sodium aluminum silicate hydrate/analcime and zeolite Y/faujasite nanocomposites were fabricated utilizing the hydrothermal method using glutamic acid and L-arginine as organic structure-directing agents.
Ehab A. Abdelrahman, Ahmed Alharbi, Abdu Subaihi, Ahmed M. Hameed, Mohammed A. Almutairi, Faisal K. Algethami, Hany M. Youssef   +6 more
doaj   +1 more source

Precipitation mechanism of anhydrite cement in lacustrine tight sandstone: Implications for fluid activity, mass transfer and pore origin of open diagenetic system in tight sandstone

The Depositional Record, Volume 12, Issue 1, February 2026.
This paper discusses a new model concerning the precipitation mechanismand significance of anhydrite cement in tight sandstone. Anhydrite cement ismainly formed by the dissolution and reprecipitation of early‐diageneticcalcite cements, feldspars and volcanic rock fragments at the mesodiageneticstage.
Long Luo, Meng Li, Shanzheng Tan, Xianfeng Tan, Xin Yu, Jon Gluyas, Jia Wang, Wei Jiang, Xuejiao Qu, Kangjun Wu, Yiting Gu   +10 more
wiley   +1 more source

Synthesis and characterization of zeolite obtained from Toraja natural montmorillonite [PDF]

Journal of the Serbian Chemical Society
Zeolites are an alternative material for treating heavy metal-containing waste. Synthetic zeolites exhibit excellent purity and particle size uniformity, which has led many researchers to explore their synthesis, including the use of natural minerals ...
Taba Paulina, Fauziah St., Natzir Hasnah, Soekamto Nunuk H., Sarungallo Rosalia S., Nahru Nur W., Astuti Yuli, Amin Ida I.   +7 more
doaj   +1 more source