Results 41 to 50 of about 507 (134)

Hematite Formation During Skarn Mineralization in the Akatani Iron Deposit, Niigata Prefecture, Japan

open access: yesResource Geology, Volume 76, Issue 1, January/December 2026.
The Akatani Fe deposit in NE Japan has been regarded as a skarn deposit because iron‐oxide ores occur within marble‐hosted skarn near the Cretaceous Ninoujidake granite. U–Pb dating of fluorapatite in the skarn indicates that this skarn formed in the Late Cretaceous, contemporaneous with the granite.
Kotaro Seno   +6 more
wiley   +1 more source

Characterization and Formation Process of Phayaung Taung Mesothermal Gold Deposit, Central Myanmar: Constraints From Raman Analysis of CO2 Bearing Fluid Inclusions

open access: yesResource Geology, Volume 76, Issue 1, January/December 2026.
This study characterizes CO2‐bearing fluid inclusions in quartz from the Phayaung Taung mesothermal gold deposit, central Myanmar, using Raman spectroscopy. The results provide constraints on fluid composition, CO2 density, and possible formation conditions, indicating the involvement of low‐salinity H2O–CO2 fluids during gold mineralization.
Naing Aung Khant   +5 more
wiley   +1 more source

Research Progress and Typical Cases of Deep Mines Backfill Technology in China

open access: yesInternational Journal of Energy Research, Volume 2026, Issue 1, 2026.
With the increasing depletion of shallow mineral resources and the growing demand for metals, deep mining has become a strategic focus for China. However, deep mining operations face a series of complex challenges, including high ground stress, elevated geothermal gradients, and severe rockburst hazards.
Shuai Li   +5 more
wiley   +1 more source

Mineralography, paragenesis sequence, and sulfur isotopic composition of Baba-Ali and Galali iron ore deposits from the Sanandaj-Sirjan zone, northwest Iran

open access: yesJournal of Economic Geology
The northern part of the Sanandaj-Sirjan zone hosts important iron deposits formed during the Mesozoic magmatism. The Baba-Ali and Galali ore deposits occurred on the border of Hamedan, Kermanshah, and Kurdistan provinces.
Majid Shirmohammadi   +5 more
doaj   +1 more source

Evaluation of the Homogeneity of Geochemical Reference Materials by Wavelength‐Dispersive X‐Ray Fluorescence Spectrometry Using 0.1 g Fusion Samples

open access: yesJournal of Chemistry, Volume 2026, Issue 1, 2026.
Good homogeneity is a critical guarantee for the accuracy of certified reference material values. X‐ray fluorescence spectrometry (XRF) is widely used for the homogeneity testing of geochemical reference materials due to its simple sample preparation and high analytical precision.
Hongkun Zhao   +8 more
wiley   +1 more source

Geoarchaeological Perspectives on Stelae Production Throughout the Bronze Age: Provenance, Material Properties and Rock Selection at Zebros (Idanha‐a‐Nova, Portugal)

open access: yesGeoarchaeology, Volume 40, Issue 6, November/December 2025.
ABSTRACT At Monte dos Zebros (Idanha‐a‐Nova, Central Portugal), the discovery of three stelae—two Iberian Late Bronze Age stelae and one fragment of an Early/Middle Bronze Age anthropomorphic stela—represents a rare case of rock art monuments from different chronologies coexisting in the same place within a broader archaeological landscape, which ...
Rafael Ferreiro Mählmann   +4 more
wiley   +1 more source

Dağbaşı skarn yataklarının jeolojik, mineralojik ve jeokimyasal özellikleri (Araklı-Trabzon, KD Türkiye)

open access: yesBulletin of the Mineral Research and Exploration, 2019
Dağbaşı skarn cevherleri Üst Kretase yaşlı Dağbaşı granitoyidi ile Liyas volkanitleri içindeki kireçtaşı blok ve merceklerinin granitoyide en yakın olduğu zonlar boyunca ekzoskarn tipte gelişmiştir.
Yılmaz DEMİR
doaj   +1 more source

Determine the Elemental Composition of Minerals From Complex Solid‐Solution Series by Raman Spectroscopy: Implications for Mars Exploration Missions

open access: yesJournal of Raman Spectroscopy, Volume 56, Issue 11, Page 1404-1417, November 2025.
This study presents a hierarchical Raman‐based classification model for determining the elemental composition of garnets within complex solid‐solution systems. The workflow combines spectral preprocessing, dimensionality reduction, and two‐level classification: first distinguishing between pyralspite and ugrandite groups, and then classifying ...
Sofia Julve‐Gonzalez   +17 more
wiley   +1 more source

Trace Metal Contamination and Health Risk Assessment in Traditional Egyptian Soft Cheeses: A Food Safety Perspective

open access: yesFood Safety and Health, Volume 3, Issue 4, Page 693-712, October 2025.
This study evaluates trace metal concentrations in traditional Egyptian soft cheeses and assesses associated health risks using chemometric and toxicological approaches. Findings confirm the safety of these cheeses, with all risk indices within acceptable limits, supporting the need for continued monitoring to ensure food quality and consumer ...
Hani S. Abdelmontaleb   +3 more
wiley   +1 more source

Mineralogical Characteristics of Skarn in Tuosibasitao Iron-Copper-Gold Deposits of the Northern Margin of Junggar, Xinjiang, and Their Geological Significance

open access: yesYankuang ceshi, 2013
The Tuosibasitao Fe-Cu-Au mineral deposit mainly occurs in the contact zone between the diorite porphyrite and basaltic volcanic rock of Middle Devonian Beitashan Formation in the forms of massives, heterogeneous gobbets, veinlets, breccia and veinlet ...
LV Shu-jun   +4 more
doaj  

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