Results 51 to 60 of about 9,688 (230)

Characterisation of gold from Fiji [PDF]

, 1995
This is a study of the variation in chemistry and inclusion mineralogy of bedrock and placer gold from Fiji. It forms part of a large project, undertaking gold characterisation from a wide range of geological environments in Ecuador, Zimbabwe ...
Henney, P.J., Naden, Jon
core  

A Review of Metal–Organic Framework (MOF) Based Active Food Packaging: Materials Selection, Cellulose Matrices Current Advances, Synthesis and Characterizations

Packaging Technology and Science, Volume 39, Issue 5, Page 533-572, May 2026.
Active packaging offers an effective approach to extending food shelf life. This review summarizes the past decade of progress in metal‐organic framework (MOF)‐based active food packaging, highlighting material selection, characterization, challenges, and future prospects.
Belladini Lovely, Young‐Teck Kim, Haibo Huang, Novitri Hastuti, Su Jung Hong   +4 more
wiley   +1 more source

Origin of fluids in iron oxide-copper-gold deposits: constraints from δ 37Cl, 87Sr/86Sri and Cl/Br [PDF]

, 2018
The origin of the hypersaline fluids (magmatic or basinal brine?), associated with iron oxide (Cu-U-Au-REE) deposits, is controversial. We report the first chlorine and strontium isotope data combined with Cl/Br ratios of fluid inclusions from selected ...
Banks, Dave, Chiaradia, Massimo, Cliff, Robert, de Haller, Antoine, Marschik, Robert   +4 more
core  

Sulfur isotope geochemistry of the Chodarchay Cu-Au deposit, Tarom, NW Iran [PDF]

, 2018
The Chodarchay porphyry–high-sulfidation epithermal Cu-Au deposit in the Tarom subzone of the western Alborz structural zone of NW Iran is related to quartz-monzonite and alkali-granite intrusions that were emplaced within the volcanic-volcaniclastic ...
Alfonso Abella, María Pura, Ghaderi, Majid, Yasami, Narges   +2 more
core   +2 more sources

Hornblendite in the Lower Crust: A Possible Source for Porphyry Cu Deposits

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Lower crustal sulfide‐bearing Cu‐rich cumulates, mainly occurring as hornblendite, have been proposed as a critical source component for the development of giant porphyry Cu deposits (PCDs); however, their mineralogical and geochemical nature remain elusive.
Guangxu Li, Lingsen Zeng, Li‐E. Gao, Lilong Yan, Haitao Wang, Linghao Zhao   +5 more
wiley   +1 more source

Major elements geochemistry of chlorite in different ore deposits and its genesis and exploration significance: a case study from Naruo porphyry Cu deposit in Duolong ore district, Tibet

Frontiers in Earth Science
Chlorite is present extensively in many types of deposits. The mechanism underlying the chemical variations in chlorite remains unclear. The Naruo porphyry deposit is a giant copper porphyry deposit in the Duolong ore district of Tibet.
Faqiao Li, Juxing Tang, Yang Song, She Li, Pan Tang, Haifeng Li, Huanhuan Yang, Qin Wang, Yongqiang Wang, Zongzhui Danzeng, Yanbo Li, Jianli Li, Hongwei Li, Yujie Dong   +13 more
doaj   +1 more source

Chemical Geodynamics of Granitoid Magmatism During a Pacific‐Philippine Sea Plate Transition in Southwest Japan

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Granitoid magmatism along the western Pacific margin records interactions between subduction dynamics and crust–mantle processes; however, the links between plate reorganization and magma‐source evolution remain debated. Here we integrate U–Pb zircon geochronology with Pb–Sr–Nd–Hf isotope systematics to investigate Cretaceous–Paleogene ...
Nghiem V. Dao, Tsegereda A. Yemer, Tulibako T. Mwaisuba, Chie Sakaguchi, Hiroshi Kitagawa, Katsura Kobayashi, Teruyoshi Imaoka, Eizo Nakamura   +7 more
wiley   +1 more source

Metal scavenging by sulfide oxidation in porphyry copper deposit root zones

Communications Earth & Environment
Porphyry copper (-gold) deposits in both arc and non-arc settings are hosted by oxidized magmatic rocks, but the exact mechanism by which the source magmas of these non-arc deposits become oxidized remains obscure.
Shiwei Wang, Taofa Zhou, Michael Anenburg, Pete Hollings, Lejun Zhang, Yu Fan, David R. Cooke, Bin Fu   +7 more
doaj   +1 more source

Porphyry indicator zircons (PIZs): Application to exploration of porphyry copper deposits

Ore Geology Reviews, 2020
Abstract Magmas with a high oxidation state (FMQ +1 to +2), a high-water content (≥ 4 wt % H2O) and a high degree of fractionation are necessary to form porphyry copper deposits (PCDs). Different proxies, such as Fe3+/Fe2+ ratio of whole-rock, minerals indicative of high oxygen fugacity (fO2) and water content as well as geochemical signatures of ...
Pizarro, Héctor, Campos, E., Bouzari, F., Rousse, Sonia, Bissig, T., Grégoire, Michel, Riquelme, R.   +6 more
openaire   +2 more sources

High Temperature Friction and Strength of Felsite and Basalt: Implications for Supercritical EGS at Krafla, Iceland

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract One promising potential site for extracting supercritical geothermal fluids is the Krafla volcano, Iceland, into which a borehole was drilled very close to a shallow rhyolite magma chamber at about 2 km depth. Besides the technical challenge to drill in this setting, the extreme temperature conditions of T > 900°C close to the magma body may ...
E. Rybacki, V. Schuster, J. Starke, S. Incel   +3 more
wiley   +1 more source