搜索结果: 1-15 共查到“知识库 理学 Pyrite”相关记录16条 . 查询时间(0.125 秒)
O2 constraints from Paleoproterozoic detrital pyrite and uraninite
O2 constraints Paleoproterozoic detrital pyrite uraninite
2014/4/8
Redox-sensitive detrital grains such as pyrite and uraninite in sedimentary successions provide one of the most conspicuous geological clues to a different composition of the Archean and early Paleopr...
Pyrite Deformation Textures in the Deposits of the Küre Mining District (Kastamonu-Turkey)
Küre (Kastamonu) Vlcanogenic massive sulfide deposits pyrite deformation textures
2009/7/8
The Küre volcanogenic massive sulfide deposits lie within the Kastamonu province in the western part of the Pontide tectonic belt of Turkey, and are hosted by ophiolite-related pre-Liassic basaltic s...
Kinetics of Aqueous Pyrite Oxidation by Potassium Dichromate - An Experimental Study
pyrite oxidation potassium dichromate activation energy reaction order trace element content
2010/4/21
Kinetics of Aqueous Pyrite Oxidation by Potassium Dichromate - An Experimental Study.
The interaction of pyrite {100} surfaces with O2 and H2O: Fundamental oxidation mechanisms
The interaction pyrite {100} surfaces with O2 H2O:Fundamental oxidation mechanisms
2012/4/1
The interaction of gaseous O , H O, and their mixtures with clean {100} surfaces of pyrite
2 2) were investigated in ultra-high vacuum using scanning tunneling microscopy and spectros-(FeS
copy (STM...
Oxidation state of gold and arsenic in gold-bearing arsenian pyrite
Oxidation state gold gold-bearing arsenian pyrite
2012/3/31
XANES measurements on gold-bearing arsenian pyrite from the Twin Creeks Carlin-type gold
and Au and arsenic is present at As . Au is attributed
deposits show that gold is present as both Au
to su...
Reactions of copper and cadmium ions in aqueous solution with goethite, lepidocrocite, mackinawite, and pyrite
copper and cadmium irons goethite lepidocrocite mackinawite andpyrite
2012/3/31
TheuptakeofCuandCdinaqueoussolutionbyinteractionwiththesurfacesofcare-
fullysynthesized?nelysizedparticlesofgoethite,lepidocrocite,mackinawite,andpyrite
wasmeasuredasafunctionofinitialmetalconcentra...
Sulfur isotope variability in biogenic pyrite: Reflections of heterogeneous bacterial colonization?
Sulfur isotope variability biogenic pyrite Reflections colonization
2012/4/1
The top 20 cm of sediments at active cold seeps in Monterey Bay, coastal California,contain framboidal pyrite that occurs as infillings and pseudomorphs of the chambers of the tests of foraminifera an...
Microbial oxidation of pyrite: Experiments using microorganisms from an extreme acidic environment
Microbial oxidation microorganisms acidic environment
2012/4/1
Surface colonization and microbial dissolution of pyrite were studied in the laboratory and by in situ surface colonization experiments conducted at Iron Mountain, California.Laboratory experiments in...
Sulfur and iron surface states on fractured pyrite surfaces
Sulfur iron surface states pyrite surfaces
2012/4/1
Pyrite has a poor {001} cleavage. Unlike most other minerals with a rocksalt-type structure, pyrite typically fractures conchoidally, demonstrating that parting surfaces are not constrained to the {00...
Reactions of aqueous Au1+ sulfide species with pyrite as a function of pH and temperature
Reactions of aqueous Au1+ sulfide species with pyrite as a function of pH and temperature
2012/3/31
The reactivity of aqueous Au11 sulfides with FeS2 at pH 5 3 and 6 for temperatures of 25 and 908C has been investigated using X-ray photoelectron spectroscopy (XPS), scan-ning electron microscopy with...
A 120 yr record of widespread contamination from mining of the Iberian pyrite belt
widespread contamination mining of the Iberian pyrite belt
2014/4/9
A metal-enriched seawater plume entering the western Mediterranean Sea through the Strait of Gibraltar originates 300 km to the west in the Rio Tinto estuary of southwestern Spain. Mining of Rio Tinto...
Gold-bearing arsenian pyrite and marcasite and arsenopyrite from Carlin Trend gold deposits and laboratory synthesis
Gold-bearing arsenian pyrite marcasite arsenopyrite Carlin Trend gold deposits laboratory synthesis
2012/4/1
Invisible gold in natural and synthetic arsenian pyrite and marcasite correlates with
anomalous As content and Fe deficiency, and high contents of invisible gold in most natural
and all synthetic ar...
Surface structural controls on pyrite oxidation kinetics: An XPS-UPS, STM, and modeling study
controls pyrite oxidation kinetics XPS-UPS STM modeling study
2012/4/6
X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS,respectively) and scan-ning tunneling microscopy (STM) were used to observe the initial oxidation of pyrite surfaces in air. The results s...
Structural relationship between pyrite and marcasite
Structural relationship pyrite marcasite
2012/4/5
Westudied pyrite spherules built of radiating crystals to establish the relationships among microstructure, composition, and macroscopic appearance. Results of high-reso-lution transmission electron m...
XPS and LEED study of a single-crystal surface of pyrite
XPS LEED study single-crystal surface pyrite
2012/4/5
This .work reports X-ray photoelectron spectroscopy (XPS) and low-energy electron dlffractlOn}~EED) results for an as-grown (100) s~rface of pyrite (FeS2) cleaned by low-energy H:lOn bombardment and t...