Results 81 to 90 of about 87,639 (320)

Development and use of in situ laser sulfur isotope analyses for pyrite-anhydrite geothermometry: An example from the pyrite deposits of the Cameros Basin, NE Spain

, 1999
We describe a system for the in situ sulfur isotope analysis of small (>100 μm) anhydrite crystals and investigate its application to anhydrite-pyrite geothermometry. Anhydrite inclusions (
Rodas González, Magdalena, Fallick, A.E., Alonso-Azcárate, J., Boyce, A.J., Bottrell, S.H., Macaulay, C.I., Mas Mayoral, José Ramón   +6 more
core   +1 more source

Fe(III):S(-II) Concentration Ratio Controls the Pathway and the Kinetics of Pyrite Formation during Sulfidation of Ferric Hydroxides [PDF]

, 2017
The formation of pyrite has been extensively studied because of its abundance in many anoxic environments. Yet, there is no consensus on the underlying pathways and kinetics of its formation. We studied the formation of pyrite during the reaction between
Stefan Peiffer, Moli Wan, Christian Schröder, Schröder, Christian, Wan, Moli, Peiffer, Stefan   +5 more
core   +1 more source

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

Geological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia, Ryohei Takahashi, Andrea Agangi, Pearlyn Manalo, Hinako Sato   +4 more
wiley   +1 more source

Geochemistry of Pyrite from the Jiaojia Gold Deposit, Jiaodong Peninsula, North China Craton: Implications for Source of Ore-Forming Fluids and Gold Precipitation

Applied Sciences
The Jiaojia gold deposit in the Jiaodong Peninsula, located in the northwestern part of the Jiaodong gold province in eastern China, has a gold reserve of over 300 t.
Yayi Fang, Yayun Liang, Rui Xia, Lei Shu, Bi He, Wenhao Xue, Chenxi Zhang, Haiyi Wang, Senmiao Xue   +8 more
doaj   +1 more source

Distinguishing Ore Deposit Type and Barren Sedimentary Pyrite Using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Trace Element Data and Statistical Analysis of Large Data Sets

Economic Geology, 2019
Faced with ongoing depletion of near-surface ore deposits, geologists are increasingly required to explore for deep deposits or those lying beneath surface cover.
Daniel D. Gregory, M. J. Cracknell, R. Large, P. McGoldrick, Stephen Kuhn, V. V. Maslennikov, M. Baker, N. Fox, Ivan Belousov, Maria Figueroa, J. Steadman, A. Fabris, T. Lyons   +12 more
semanticscholar   +1 more source

Molecular Palaeontology Prospects From Exceptionally Preserved Eocene Brackish‐Water Bivalve Batissa sitakaraensis (Venerida: Corbiculidae) From Hokkaido, Japan

Geological Journal, EarlyView.
This study reports the exceptional preservation of the Eocene freshwater bivalve Batissa sitakaraensis from Hokkaido, Japan. Multimodal analyses reveal that both the aragonitic shell mineralogy and the delicate organic periostracum retain their original structural and chemical characteristics after millions of years.
Taro Yoshimura, Kazuki Hirota, Hiroyuki Kagi, Takashi Matsubara, Takenori Sasaki   +4 more
wiley   +1 more source

The kinetics of the dissolution of chalcopyrite in chloride media [PDF]

, 2009
One of the most important outstanding problems with the hydrometallurgy of copper is the low temperature leaching of chalcopyrite. In this thesis, a fundamental study at low temperature was undertaken in order to establish a mechanism, which is ...
Velásquez Yévenes, Lilian
core  

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Application of EPMA to Study the Characteristics of Gold-bearing Minerals in the Zhaojiazhuang Gold Deposit in Longnan, Gansu Province

Yankuang ceshi, 2018
BACKGROUND Microscopy and Electron Microprobe are the main methods for the study of gold-bearing minerals. Using these methods, the content and morphology of gold-bearing minerals and their spatial relationship with other minerals were studied in the ...
JING Guo-qiang, LIAN Kang, HU Fei-fei, LI Lei, DU Ya-long   +4 more
doaj   +1 more source

Invisible Gold Paragenesis and Geochemistry in Pyrite from Orogenic and Sediment-Hosted Gold Deposits

Minerals, 2020
LA-ICPMS analysis of pyrite in ten gold deposits is used to determine the precise siting of invisible gold within pyrite, and thus the timing of gold introduction relative to the growth of pyrite and related orogenic events.
R. Large, V. Maslennikov
semanticscholar   +1 more source