Results 111 to 120 of about 87,639 (320)

A review of Te and Se systematics in hydrothermal pyrite from precious metal deposits: Insights into ore-forming processes

, 2017
Pyrite is one of the most common minerals in many precious and base metal hydrothermal ore deposits and is an important host to a range of trace elements including Au and Co and the semi-metals As, Se, Sb, Te and Bi.
M. Keith, David J. H. Smith, Gawen R. T. Jenkin, D. Holwell, M. Dye   +4 more
semanticscholar   +1 more source

Mortars From Punic and Hellenistic–Roman Solunto: Materials, Formulations, and Technology

Archaeometry, EarlyView.
ABSTRACT This study presents an archaeometric investigation of 18 hydraulic rendering and bedding mortars from Punic and Hellenistic–Roman Solunto (NW Sicily). The research aimed to characterize raw materials, reconstruct manufacturing sequences, and evaluate technological proficiency through mineralogical and petrochemical analyses.
G. Montana, G. Polizzi, C. Portale, M. Gasparo Morticelli, L. Randazzo   +4 more
wiley   +1 more source

Sulfonated Dextrin-Derived Efficient Flotation Separation of Chalcopyrite and Pyrite Under Low Alkalinity

Metals
The selective flotation separation of chalcopyrite from pyrite under low-alkalinity conditions remains a challenge due to their similar surface properties.
Feng Jiang, Yang Li, Shuai He, Wei Sun, Hong-Hu Tang   +4 more
doaj   +1 more source

ON THE ESTIMATION OF SULPHUR IN PYRITES. [PDF]

Journal of the American Chemical Society, 1896
n ...
openaire   +1 more source

Correlative optical, electron, and electrochemical microscopy assessment of localised sulphide reactivity in concrete aggregates

Journal of Microscopy, EarlyView.
Abstract Iron‐sulphide‐bearing aggregates can compromise concrete durability when reactive sulphide phases, particularly pyrrhotite (Fe1–xS), oxidise and contribute to internal sulphate attack, cracking, and premature deterioration. Existing aggregate assessment methods, including bulk sulphur measurements, petrographic examination, oxygen consumption ...
Joshua O. Atiba, Karl Peterson, Ibrahim G. Ogunsanya   +2 more
wiley   +1 more source

Heterodonty in the teeth of the turiasaurian sauropod from Angeac‐Charente (Early Cretaceous, southwestern France): Comparison of anatomical and geometric morphometric approaches

Journal of Anatomy, EarlyView.
Turiasaurian teeth from Angeac‐Charente exhibit five dental morphotypes and reveal clear heterodonty and anteroposterior size gradient. Qualitative comparative anatomy quickly and efficiently identifies morphotypes, while 3D geometric morphometrics combined with machine learning refine ambiguous cases, demonstrating that qualitative and quantitative ...
Clémence Le Gouellec, Ronan Allain, Jean Goedert, Romain Pintore, Jackson Carter, Rafael Royo‐Torres, Dominique Augier, Raphaël Cornette   +7 more
wiley   +1 more source

Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China

, 2016
The newly discovered Caixiashan Irish-type Zn-Pb deposit (similar to 131 Mt at 3.95 % Zn + Pb), located in the Eastern Tianshan of Xinjiang, is one of the largest Zn-Pb deposits in NW China.
Fang, Jing, Lu, Wanjian, Zhang, Li, Li, Jie, Mi, Mei, Hollings, Pete, Wang, Chengming, Li, Dengfeng, Chen, Huayong   +8 more
core   +1 more source

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

Processes and Patterns of Dolomite Precipitation in Aptian Pre‐Salt Deposits of Santos Basin, Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The Aptian pre‐salt lacustrine carbonates represent the most significant oil exploration target along the South Atlantic margin. Dolomitization of the Santos Basin Barra Velha Formation (BVF) is critical for reservoir quality, yet its origin, patterns, and evolution remain poorly understood.
J. T. F. Oste, R. Fricks Sayão, L. F. De Ros, L. Borghi   +3 more
wiley   +1 more source

Pyrite oxidation in coal bearing strata:: controls on in-situ oxidation as a precursor of acid mine drainage formation [PDF]

, 2002
Pyrite oxidation in coal-bearing strata is recognised as the main precursor to Acidic Mine Drainage (AMD) generation. Predicting AMD quality and quantity for remediation, or proposed extraction, requires assessment of interactions between oxidising ...
Roy, Samita
core