Results 41 to 50 of about 976 (183)

Stability and solubility of arsenopyrite, FeAsS, in crustal fluids [PDF]

Geochimica et Cosmochimica Acta, 2002
The stability and solubility of natural arsenopyrite (FeAsS) in pure water and moderately acid to slightly basic aqueous solutions buffered or not with H2 and/or H2S were studied at temperatures from 300 to 450°C and pressures from 100 to 1000 bar. The solubilities of FeAsS in pure water and dilute HCl/NaOH solutions without buffering are consistent ...
Pokrovski, Gleb S., Kara, Sami, Roux, Jacques   +2 more
openaire   +2 more sources

Mineralogy of Historic Scheelite Mine Tailings at Glenorchy, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Otago Schist orogenic mineral deposits with scheelite and gold in the Glenorchy area are mineralogically and geochemically similar to, but structurally different from, those at the active Macraes gold mine in East Otago. Glenorchy veins were mined for scheelite up to 1970s, and an abandoned processing battery site at Glenorchy is now being managed for ...
Dave Craw, Marshall Palmer, Doug MacKenzie   +2 more
wiley   +1 more source

Impacts of Climate Change on Groundwater Quality in the Northern Atlantic Coastal Plain: A Review

JAWRA Journal of the American Water Resources Association, Volume 62, Issue 3, June 2026.
ABSTRACT This review integrates hydrogeological and geochemical processes to assess the impacts of climate change on groundwater quality in the Northern Atlantic Coastal Plain (NACP). Projected changes in air temperature, precipitation, and sea‐level rise are expected to influence groundwater recharge, discharge, storage, and seawater intrusion in ...
Zahid Aziz, Nicholas A. Procopio
wiley   +1 more source

A Review of the Unintended Consequences of Biochar in Various Applications

Advanced Energy and Sustainability Research, Volume 7, Issue 5, May 2026.
Biochar is widely promoted as a sustainable material for applications ranging from soil amendment to energy storage and construction materials. This review critically examines the often‐overlooked and unintended consequences of biochar, including variability in properties, safety risks, and performance limitations.
Singaravelu Vivekanandhan, Elif Kaynak, Dong Wang, Vigneshwaran Shanmugam, Aurelio Bifulco, Julio Diarte Almada, Imelda Saran Piri, Zhengyang Wang, Lokesh P. Padhye, Nam Kyeun Kim, Michael Försth, Jaime Gonzalez‐Libreros, Igor Wachter, Sabrina Karim, Oisik Das   +14 more
wiley   +1 more source

Selective Dissolution and Mechanism of Arsenopyrite by the Oxidizing Agent in Alkaline Leaching System

Kuangchan zonghe liyong
Arsenopyrite is a common gold-bearing mineral, and the presence of arsenic leads to difficulties in gold recovery. In this paper, the effects of leaching time, NaOH concentration, temperature and potassium permanganate concentration on the arsenic ...
Kai JIN, Wenbin YUAN, Xiaolong WANG, Wenqing QIN, Yansheng ZHANG   +4 more
doaj   +1 more source

In situ single‐spot Rb/Sr cosmochronology of roedderite in the Ribbeck aubrite (asteroid 2024 BX1)

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 768-781, May 2026.
Abstract The mineralogy and textures of several fragments from the Ribbeck aubrite were analyzed using a combination of scanning electron microscopy, electron microprobe analysis, μRaman spectroscopy, and laser ablation inductively coupled reaction cell mass spectrometry (LA‐ICP‐MS/MS).
Christopher J. Barnes, Aleksander Błasiak, Helge Vinje Birgerheim, Matthias Konrad‐Schmolke, Delia Rösel, Jarosław Majka, Thomas Zack   +6 more
wiley   +1 more source

Production of arsenical bronze using speiss on the Elephantine Island (Aswan, Egypt) during the Middle Kingdom (Middle Bronze Age) (c.2000–1650 BCE)

Archaeometry, Volume 68, Issue S1, Page S38-S63, April 2026.
Abstract This paper presents the first direct evidence of the slags produced during the cementation alloying process of Cu with speiss inside ceramic crucibles, thus representing Cu alloying with As in Middle Kingdom Egypt. The settlement deposits from the Middle Bronze Age were excavated on Elephantine Island, within modern Aswan.
Jiří Kmošek, Martin Odler
wiley   +1 more source

A contribution to the decrepitation study of the minerals [PDF]

Acta Montanistica Slovaca, 2000
The decrepitation activity of selected carbonate and sulphide minerals, as well as baryte was studied and it is presented in this paper. The thermal-vacuum impulse method was selected to be used for such a study within the thermal range of 25 – 400°C. It
Ragan Emil, EliᚠKarol, Boháèik ¼ubomír, Krajecová Otília, Miklúšová Viera, Turèániová ¼udmila   +5 more
doaj  

Geological structure and perspectives for mineralization of the Kichany structure, Tiksheozersky greenstone belt (Northern Karelia)

Литосфера, 2017
Mineral deposits in the Neoarchean greenstone belts in the Fennoscandian Shield, especially in its eastern (Russian) part, are not as numerous as in Archean belts of Canada, Australia, or Southern Africa.
A. Kalinin Arkady, Yu. Astaf’ev Boris, A. Voinova Ol′ga, B. Bayanova Tamara, V. Khiller Vera   +4 more
doaj   +1 more source

An Archaeometallurgical Investigation on Some Archaeological Metal Finds From the Sasanian Site of Jahāngir, Western Iran

Archaeometry, Volume 68, Issue S1, Page S103-S115, April 2026.
ABSTRACT Twelve metal artifacts from recent excavations at the Sasanian archaeological site of Jahāngir in western Iran have been analyzed. These items include both decorative and utilitarian artifacts. The samples were examined using micro‐X‐ray fluorescence (μ‐XRF), scanning electron microscopy with energy‐dispersive X‐ray spectroscopy (SEM‐EDS), and
Omid Oudbashi, Leila Khosravi, Morteza Habibzadeh   +2 more
wiley   +1 more source