Results 41 to 50 of about 462 (183)

The tungsten-gold veins of Bonnac (French Massif central): new constraints for a Variscan granite-related genesis

BSGF - Earth Sciences Bulletin, 2021
In the Brioude-Massiac district (French Massif Central: FMC), a network of W-As-Bi-Au quartz veins constitutes the Bonnac deposit, where tungsten is the major economic element, together with high-grade gold (up to 15 g/t Au).
Cheval-Garabédian Florent, Faure Michel, Marcoux Eric, Poujol Marc   +3 more
doaj   +1 more source

Gold mineralization of the Arctic Belt of the Russian Far East

Руды и металлы
The gold ore-bearing potential of the Early Cretaceous Arctic orogenic belt of the Far Eastern Arctic is characterized. The gold mineralization is represented by the Au-quartz vein, Au-sulfide disseminated in folded and crushed zones, Au-Bi (gold-rare ...
Goryachev N. A.
doaj   +1 more source

Aeolian and Biogeochemical Transformations of Detrital Gold Morphology in the Pool Burn Basin, Central Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
The Pool Burn basin is a tectonic depression that became almost isolated from the regional drainage system by river reorientation during Pleistocene uplift of surrounding ridges. Consequently, detrital gold in the basin was largely locally derived, from supergene zones on orogenic deposits and recycled from paleoplacers in erosional remnants of Miocene
Marshall Palmer, Dave Craw
wiley   +1 more source

Assessing Pb Isotopic Equilibrium Between Apatite and K‐Feldspar

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract Quantifying common Pb, the non‐radiogenic Pb present in a mineral independent of in situ U decay, is essential for obtaining accurate U–Pb ages in common Pb‐bearing minerals such as apatite. However, constraining the amount and composition of common Pb, as well as the timing of its entrapment, remains a persistent challenge.
Priyanjan Datta, Christopher L. Kirkland, Janne Liebmann, Hugo K. H. Olierook   +3 more
wiley   +1 more source

Gold Fineness in the Jiangnan Orogenic Belt of South China: Correlations with Geological Characteristics and Fluid Conditions [PDF]

Lithosphere
A large number of Au deposits in the Jiangnan Orogenic Belt (JOB) are characterized by producing the bonanza-style gold with extremely high gold fineness (GF) in orogenic Au deposits and intrusion-related Au deposits.
Yi Liang, Huaiyi Zhang, Haonan Huang, Qiuming Pei, Hangfei Ge, Xingyu Jiao   +5 more
doaj   +1 more source

Ultrahigh‐Temperature Metamorphism and Near‐Isobaric Cooling of Garnet‐Orthopyroxene Granulite Xenoliths in the Sancheong Anorthosite, Yeongnam Massif, Korea

Journal of Metamorphic Geology, Volume 44, Issue 1, Page 20-46, January 2026.
ABSTRACT Elevated heat flow associated with mafic magmatism in accretionary orogens has often been proposed as a driving mechanism for (ultra)high‐temperature (UHT) metamorphism and anatexis. The Sancheong–Hadong complex, located in the southern Yeongnam Massif, Korea, consists of a ca.
Yuyoung Lee, Moonsup Cho, Jeongmin Kim, Youn‐Joong Jeong   +3 more
wiley   +1 more source

A Hybrid LightGBM–WOA Model for Accurate Prediction of Back‐Break in Mine Blasting Operations: A Case Study

Shock and Vibration, Volume 2026, Issue 1, 2026.
Back‐break (BB), a significant environmental concern in mining operations, arises from the improper execution of blasting techniques. The primary cause of BB is the inadequate design of blasting pattern parameters, which leads to structural issues such as fractures, overhangs, and underhangs on the construction face.
Mojtaba Yari, Biao He, Xuzhen He, Payam Abbasi, Hadi Fattahi, Danial Jahed Armaghani, Manoj Khandelwal, Zhipeng Zhao   +7 more
wiley   +1 more source

Overview of geothermal resource exploration and development in North Africa

Deep Underground Science and Engineering, Volume 4, Issue 4, Page 673-685, December 2025.
This article reviews geothermal exploration in North Africa, highlighting key activities, government policies, and exploration findings across Mauritania, Morocco, Algeria, Tunisia, Libya, and Egypt. The region's substantial geothermal potential, driven by tectonic activity, positions it to play a significant role in the global geothermal energy ...
Meryem Redouane
wiley   +1 more source

Laser Ablation ICPMS Analysis of Pyrite and U-Pb Zircon Dating of Host Rocks From the Tersang Gold Deposit, Malaysia

AIMS Geosciences, 2017
The Central gold belt of peninsular Malaysia comprises a number of gold deposits located in the east of the N-S striking Bentong-Raub Suture Zone. The Tersang gold deposit is a mesothermal, orogenic gold deposit, which is hosted in sandstone, shale ...
Charles Makoundi, Khin Zaw, R.R. Large
doaj   +1 more source

Microscale geochemical variations in metamorphic‐hydrothermal scheelite and insights into trace element sources (Otago Schist, New Zealand)

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 4, Page 659-674, December 2025.
ABSTRACT Scheelite (CaWO4) trace elements are frequently used to fingerprint sources of mineralising fluids or styles of mineralisation. However, the chemistries of scheelite from hydrothermal‐metamorphic Otago Schist scheelite‐quartz veins have complicated parageneses.
Mark T. Ireland, Marshall C. Palmer, James M. Scott, Petrus J. le Roux, Malcolm R. Reid, Claudine H. Stirling   +5 more
wiley   +1 more source