Готові списки джерел за темами / Ag2TeNW

Добірка наукової літератури з теми "Ag2TeNW"

Автор: Grafiati

Опубліковано: 6 вересня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Зміст

Статті в журналах
Дисертації
Книги
Тези доповідей конференцій
Звіти організацій

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Ag2TeNW".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Ag2TeNW"

Klein, Wilhelm, Jan Curda, Eva-Maria Peters, and Martin Jansen. "Disilberoxotellurat(VI), Ag2TeO4." Zeitschrift f�r anorganische und allgemeine Chemie 631, no. 4 (March 2005): 723–27. http://dx.doi.org/10.1002/zaac.200400457.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

El Zaibani, M. El Zaibani, A. Altawaf Altawaf, and E. F. El Agammyc. "Tracking of Formed Crystalline Phases in the Binary Silver Tellurite Glass-ceramics." مجلة جامعة عمران 3, no. 5 (June 24, 2023): 12. http://dx.doi.org/10.59145/jaust.v3i5.56.

Повний текст джерела

Анотація:

Glasses and glass-ceramics based on silver tellurite system xAg2O·(100-x)TeO2 (0 £ x £ 60 mol%) were prepared by melt-quenching method. The structure of the studied glasses and glass-ceramics was investigated by several techniques. XRD patterns reveal the existence of only one glassy region at 20 < x ≤ 30 mol% with two crystalline a-TeO2 and Ag2TeO3 phases that formed separately in the prepared samples below 20 and beyond 30 mol% Ag2O, respectively. The peaks intensity corresponding to the crystalline a-TeO2 and Ag2TeO3 phases was found to decrease and increase with Ag2O content, respectively. This may be correlated with changes in the concentration of and units that, respectively, build up the crystalline a-TeO2 and Ag2TeO3 phases. In the glassy region, there is no crystalline phase, which may be attributed to the abundance of the deformed units that build up the glassy phase, and the concentrations of and units are neglected in this region. SEM and TEM micrographs and the related electron diffraction patterns (EDP) confirmed the formation of crystallized clusters in Ag2O-rich glasses.

Стилі APA, Harvard, Vancouver, ISO та ін.

Su, Xin, Yuan Gao, Qi Wu, Haizeng Song, Shancheng Yan, and Yi Shi. "Robust UV Plasmonic Properties of Co-Doped Ag2Te." Crystals 12, no. 10 (October 17, 2022): 1469. http://dx.doi.org/10.3390/cryst12101469.

Повний текст джерела

Анотація:

Ag2Te is a novel topological insulator system and a new candidate for plasmon resonance due to the existence of a Dirac cone in the low-energy region. Although the optical response spectrum of Ag2Te has been studied by theoretical and experimental methods, the plasmon resonance and stability of Co-doped Ag2Te remain elusive. Here, we theoretically report a new unconventional UV plasmon mode and its stability in Co-doped Ag2Te. Through density functional theory (DFT), we identify a deep UV plasmon mode within 15–40 eV, which results from the enhanced inter-band transition in this range. The deep UV plasmon is important for detection and lithography, but they have previously been difficult to obtain with traditional plasmon materials such as noble metals and graphene, while most of which only support plasmons in the visible and infrared spectra. Furthermore, we should highlight that the high-energy dielectric function is almost invariant under different doping amounts, indicating that the UV plasmon of Ag2Te is robust under Co doping. Our results predict a spectrum window of a robust deep UV plasmon mode for Ag2Te-related material systems.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ragimov, S. S., M. A. Musayev та N. N. Hashimova. "Transport properties of (AgSbТe₂)_0.7(PbTe)_0.3 thermoelectric compound". Low Temperature Physics 48, № 10 (жовтень 2022): 787–90. http://dx.doi.org/10.1063/10.0014020.

Повний текст джерела

Анотація:

Transport properties, namely electrical conductivity, Seebeck and Hall coefficients, and thermal conductivity, were measured from 80 to 560 K. The phase transition at about 410 K, representing the phase transition from α-Ag2Te to β-Ag2Te, influences the electrical transport properties. The temperature dependence of Hall coefficient passes through a maximum ∼200 K and has a negative sign. It is shown that these peculiarities are due to the presence of Ag2Te phase.

Стилі APA, Harvard, Vancouver, ISO та ін.

Lee, Sunghun, Ho Sun Shin, Jae Yong Song, and Myung-Hwa Jung. "Thermoelectric Properties of a Single Crystalline Ag2Te Nanowire." Journal of Nanomaterials 2017 (2017): 1–5. http://dx.doi.org/10.1155/2017/4308968.

Повний текст джерела

Анотація:

Silver chalcogenides have received much attention in potential thermoelectric materials research because of high carrier mobility and low effective mass. Among them, in Ag2Te, it was reported that the phase transition from monoclinic to cubic phase occurs at relatively low temperatures, so that extensive research for effective application using this material has been aroused. In this work, we investigated how 1-dimensional nanostructure affects the thermoelectric properties through as-synthesized single crystalline Ag2Te nanowires. Adopting well-defined thermoelectric MEMS device structure and transferring an individual Ag2Te nanowire, we measure electrical resistance and Seebeck coefficient as a function of temperature. When the phase changes from monoclinic to cubic, the resistance increases, while absolute Seebeck coefficient value decreases. These results are compared with previous reports for Ag2Te bulk and film, suggesting the increased density of states of the carriers due to nanowire structure.

Стилі APA, Harvard, Vancouver, ISO та ін.

Uruno, Aya, and Masakazu Kobayashi. "Formation of AgGaTe2 films from (Ag2Te+Ga2Te3)/Ag2Te or Ga2Te3/Ag2Te bilayer structures." AIP Advances 8, no. 11 (November 2018): 115023. http://dx.doi.org/10.1063/1.5039992.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Pandiaraman, M., N. Soundararajan, and R. Ganesan. "Optical Studies of Physically Deposited Nano-Ag₂Te Thin Films." Defect and Diffusion Forum 319-320 (October 2011): 185–92. http://dx.doi.org/10.4028/www.scientific.net/ddf.319-320.185.

Повний текст джерела

Анотація:

Silver telluride (Ag2Te), I-VI semiconductor compound with potential applications in various advanced fields. Ag2Te nano films of thickness between 16 nm and 145 nm prepared by thermal evaporation technique at high vacuum better than 2x105 mbar. These films are found to exhibit polycrystalline nature with monoclinic structure from their XRD studies. The average particle size of these films are found to be around 24 nm using the Debye-Scherrer’s formula From AFM measurements, the average particle size is around 24 nm. The emission spectra of these films were recorded and analysed to determine its optical band gap. Optical band gap of Ag2Te varies from 1.6 eV to 1.8 eV with respect to their corresponding thicknesses of films.

Стилі APA, Harvard, Vancouver, ISO та ін.

Moroz, Mykola, Fiseha Tesfaye, Pavlo Demchenko, Myroslava Prokhorenko, Nataliya Yarema, Daniel Lindberg, Oleksandr Reshetnyak, and Leena Hupa. "The Equilibrium Phase Formation and Thermodynamic Properties of Functional Tellurides in the Ag–Fe–Ge–Te System." Energies 14, no. 5 (February 28, 2021): 1314. http://dx.doi.org/10.3390/en14051314.

Повний текст джерела

Анотація:

Equilibrium phase formations below 600 K in the parts Ag2Te–FeTe2–F1.12Te–Ag2Te and Ag8GeTe6–GeTe–FeTe2–AgFeTe2–Ag8GeTe6 of the Fe–Ag–Ge–Te system were established by the electromotive force (EMF) method. The positions of 3- and 4-phase regions relative to the composition of silver were applied to express the potential reactions involving the AgFeTe2, Ag2FeTe2, and Ag2FeGeTe4 compounds. The equilibrium synthesis of the set of phases was performed inside positive electrodes (PE) of the electrochemical cells: (−)Graphite ‖LE‖ Fast Ag+ conducting solid-electrolyte ‖R[Ag+]‖PE‖ Graphite(+), where LE is the left (negative) electrode, and R[Ag+] is the buffer region for the diffusion of Ag+ ions into the PE. From the observed results, thermodynamic quantities of AgFeTe2, Ag2FeTe2, and Ag2FeGeTe4 were experimentally determined for the first time. The reliability of the division of the Ag2Te–FeTe2–F1.12Te–Ag2Te and Ag8GeTe6–GeTe–FeTe2–AgFeTe2–Ag8GeTe6 phase regions was confirmed by the calculated thermodynamic quantities of AgFeTe2, Ag2FeTe2, and Ag2FeGeTe4 in equilibrium with phases in the adjacent phase regions. Particularly, the calculated Gibbs energies of Ag2FeGeTe4 in two different adjacent 4-phase regions are consistent, which also indicates that it has stoichiometric composition.

Стилі APA, Harvard, Vancouver, ISO та ін.

Som, Anirban, and T. Pradeep. "Heterojunction double dumb-bell Ag2Te–Te–Ag2Te nanowires." Nanoscale 4, no. 15 (2012): 4537. http://dx.doi.org/10.1039/c2nr30730h.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ali, Liqaa S., and Aliyah A. Shihab. "Ag2Te thin films' structural and optical characteristics as a result of Al doping." Journal of Ovonic Research 19, no. 4 (August 2023): 433–38. http://dx.doi.org/10.15251/jor.2023.194.433.

Повний текст джерела

Анотація:

During the course of this investigation, Ag2Te and Al-doped Ag2Te films' structural and optical properties at various concentrations (1%, 1.5%) are examined. The thermal evaporation method was used to deposit 400-nm thick Ag2Te thin films on glass substrates at 100 °C. The structure is monoclinic of the polycrystalline films were revealed by (XRD). Between 1 and 1.5%, the activated precursor did not vary with respect to the favored direction. According to the XRD results, the mean crystal sizes ranged from 25.62 to 37.13 nm. The surface of the film is incredibly smooth, according to atomic force microscope study (AFM). The produced films' optical characteristics were investigated. optical absorption coefficient (α) of films were determined using the absorption spectra within the wavelength region (400-1000) nm. It was discovered that the optical energy gap allows direct transmission and that it narrows with doping.. AFM was used to measure the grain size and roughness, which change when impurities are added.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Ag2TeNW"

Boubali, Mahjoub. "Equilibres de phases dans les systèmes Ag2Te-Tl2Te et AgTlTe-Cu2Te : propriétés thermoélectriques des phases isolées." Montpellier 2, 1991. http://www.theses.fr/1991MON20013.

Повний текст джерела

Анотація:

La fabrication du materiau thermoelectrique a facteur de merite eleve, dont la composition ag#. #5#8cu#. #2#9tl#. #9#4te avait ete precedemment etablie, necessite une connaissance parfaite des equilibres de phases du systeme quaternaire ag-cu-tl-te. Le present memoire est essentiellement consacre a cette etude. Une premiere partie decrit le diagramme des equilibres du systeme ag#2te-tl#2te, ainsi que les differents composes qui existent dans cette coupe. Ce travail apporte des eclaircissements precieux concernant la phase agtlte (domaine de solution solide et polymorphisme). Dans une deuxieme partie, l'auteur decrit les equilibres de phases dans les coupes du quaternaire: cutlte, - et -. De ces travaux il resulte la mise en evidence d'une zone de solution solide , de structure identique a celle de agtlte. Dans ce cas les atomes d'argent peuvent etre substitues par des atomes de cuivre et ou les sites des atomes de thallium peuvent etre partiellement vacants ou occupes par les atomes d'argent et de cuivre. La troisieme partie de l'ouvrage indique comment ces possibilites peuvent etre utilisees dans l'optimisation du materiau thermoelectrique et notamment pour son dopage. L'ensemble des resultats amene a une reflexion sur les problemes liant la composition chimique au nombre de porteurs de charge ainsi que sur la possibilite de preparation des materiaux poly et monocristallins

Стилі APA, Harvard, Vancouver, ISO та ін.

Liu, Bing-Fong, and 劉秉豐. "Magnetic properties and microstructure of exchange-coupled disorder/order (FePt-Ag2Te)/(Ag/FePt) Film." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/00073787106311560444.

Повний текст джерела

Анотація:

碩士
國立中興大學
材料科學與工程學系所
98
A soft/hard chemically disordered/ordered (FePt-Ag2Te)/(Ag-FePt) films was prepared on a glass substrate. Annealed (FePt-Ag2Te)/(Ag-FePt) film at 700oC for 1 minute allowed modification of the sharp interface to graded interface and the FePt-Ag2Te layer was changed from disordered to ordered. The out-of-plane magnetic hysteresis loops show perpendicular anisotropy with rigid magnetization which was due to the nanoscale interface exchange coupling. When the thickness of (FePt-Ag2Te) layer increased from 3nm to 10nm, the out-of-plane coercivity increased continuously which was interpreted by the degree of ordering and graded magnetic anisotropy. The exchange coupled composite film with perpendicular magnetization can be performed in the chemically disordered/ordered FePt system. In addition, a soft/hard chemically disordered/ordered (FePt-Fe)/(Ag/FePt) films was prepared on a glass substrate. The (FePt-Fe)/(Ag/FePt) film was exchange coupled and shows single switching field. Annealed (FePt-Fe)/(Ag/FePt) film from 200oC to 700oC for 1 minute allowed modification of the sharp interface to graded interface and the FePt-Fe layer was changed from disordered to ordered gradually. The 13% Ag2Te was alloyed into the FePt-Fe layer to separate the magnetic grains. The (FePt-Fe)/(Ag/FePt) films annealed from 200-600oC show two-steps out-of-plane magnetization curves. The magnetization of partially disordered FePt-Fe reversed first and followed by the ordered Ag/FePt film. When the film annealed at 700oC, the out-of-plane magnetic hysteresis loops show perpendicular anisotropy with rigid magnetization which was due to the nanoscale interface exchange coupling. The magnetization was reversed at a single switching field and interpreted by the two-spin model. The exchange coupled composite film with perpendicular magnetization can be performed in the chemically disordered/ ordered FePt system.

Стилі APA, Harvard, Vancouver, ISO та ін.

Yang, Ting-ruei, and 楊庭瑞. "Interfacial reactions between Ni barrier layer and thermoelectric substrates: Ag2Te, (Bi,Sb)2Te3, and Bi2(Te,Se)3." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/72675320497357823558.

Повний текст джерела

Анотація:

碩士
國立清華大學
化學工程學系
103
Thermoelectric devices can convert heat into electricity directly, and have attracted enormous research interests. There are usually numerous solder (or braze) joints in thermoelectric devices. To prevent direct contact and interfacial reactions between solder (or braze) and thermoelectric materials, barrier layer is often used. Ni is the most commonly used barrier layer material. Examination of the interfacial reactions between Ni and thermoelectric substrates is fundamentally important for reliability assessment of the thermoelectric devices. This study investigates interfacial reactions between Ni and three kinds of thermoelectric materials: Ag2Te, (Bi,Sb)2Te3, and Bi2(Te,Se)3. The thermoelectric substrates are prepared with proper amounts of pure constituent elements, and are then plated with Ni. The thickness of Ni layer is 60μm. Ni3Te2, NiTe0.775 and NiTe2 are formed in the Ni/Te couple reacted at 200oC for 720 hours. Two reaction regions are observed in the Ni/Ag2Te couple reacted at 200oC for 720 hours. A continuous Ag layer is formed adjacent to the Ni substrate. The other reaction region is a two-phase finger-type mixture. The darker phase in this two-phase region is the Ni3Te2 phase and the other brighter phase is Ag2Te phase with Ni solubility. This study also investigates the interfacial reactions between Ni/Te couple and Ag2Te couple at 250 oC. Ni3Te2, NiTe0.775 and NiTe2 are also formed in the Ni/Te couple reacted at 250oC for 720 hours, and the thickness of reaction layer is about 102.6μm. Two reaction regions are observed in the Ni/Ag2Te couple reacted at 250oC for 720 hours. A continuous Ag layer is formed adjacent to the Ni substrate. Comparing with those in the Ni/Ag2Te 200oC reaction couple, a continuous Ni3Te2 reaction layer is formed adjacent to the Ag2Te substrate. The interfacial reactions between the Ni barrier layer and the P-type (Bi1-xSbx)2Te3 and n-type Bi2(Te1-ySey)3 thermoelectric materials at 300oC are examined. Two reaction phase layers are observed in the Ni/(Bi0.25Sb0.75)2Te3 couples reacted at 300oC. The phase layer adjacent to the Ni substrate is likely a Sb-Ni-Te ternary compound or the Ni3Te2 phase with significant Sb solubility.In the In the Ni/ Bi2(Te0.9Se0.1)3 couple reacted at 300oC two reaction phase layers are also found. The BiTe phase is adjacent to the Bi2(Te0.9Se0.1) substrate, while a Bi-Ni-Te ternary compound or the NiTe2 phase with Bi solubility is formed adjacent to the Ni substrate. It can be found that the thickness of the reaction layers in the Ni/Bi2(Te0.9Se0.1)3 couple is thicker than that in the Ni/(Bi0.25Sb0.75)2Te3. Furthermore, the reaction rate at 300oC is faster than that at 250oC.

Стилі APA, Harvard, Vancouver, ISO та ін.

Tseng, Hsi-Te, and 曾信得. "The Magnetic properties and microstructure of exchange-coupled Fe/FePt bilayer and particulate (Ag2Te/FePt)n film with perpendicular magnetization." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/43991014446173495643.

Повний текст джерела

Анотація:

碩士
國立中興大學
材料科學與工程學系所
98
A [FePt (1 nm)/Ag2Te(t)]10 (thickness t = 0.1-0.3 nm) multilayer was deposited alternately on glass substrate and subsequently annealed by a rapid thermal process (RTP). After the RTP, the interface between FePt and Ag2Te was intermixed, forming particulate films. The L10 FePt grain size decreases from 23 nm to 14 nm as t of the Ag2Te intermediate layer increases from 0.1 to 0.3 nm. The (FePt/Ag2Te)10 particulate film shows perpendicular magnetization. Compared to (FePt/Ag2Te)10, the Ag/FePt/Ag trilayer also shows perpendicular magnetization with less c-axis dispersion. The Ag capping and seed layers reduce the ordering temperature of FePt but facilitate its grain growth during RTP. As a result, the FePt grains are refined and well-separated by the Ag2Te phase, but change to a continuous film after inserting Ag capping and seed layers. A soft/hard Fe/FePt bilayer with perpendicular magnetization was prepared on a glass substrate. Annealed Fe/FePt film allowed modification of the Fe/FePt sharp interface to Fe/(Fe-rich FePt)/FePt graded interface with rigid magnetization due to the nanoscale soft/hard interface coupling. The magnetization was reversed at a single switching field and interpreted by the two-spin model. When the annealed temperature of the Fe/FePt film increased, the reamnence magnetization decreased continuously but the out-of-plane coercivity increased obviously at 600-700oC which was interpreted by the graded magnetic anisotropy. The coercivity can be tuning in the exchange coupled composite film.

Стилі APA, Harvard, Vancouver, ISO та ін.

Книги з теми "Ag2TeNW"

Jaireth, Subhash. Hydrothermal geochemistry of Te, Ag2Te, and AuTe2 in epithermal precious metal deposits. Townsville, Q: Economic Geology Research Unit, Geology Dept., James Cook University of North Queensland, 1991.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Ag2TeNW"

Bhatt, Ranu, Gopika Krishnan, Shovit Bhattacharya, Anil Bohra, Pramod Bhatt, Ranita Basu, Ajay Singh, D. K. Aswal, and S. K. Gupta. "Chemical synthesis and characterization of PdTe-Ag2Te nanowires heterostructure." In DAE SOLID STATE PHYSICS SYMPOSIUM 2015. Author(s), 2016. http://dx.doi.org/10.1063/1.4947779.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ma, Hao, Tianyi Li, and Jie Huang. "Study on electronic structure and optical properties of bulk and monolayer Ag2Te." In 2022 International Conference on Applied Physics and Computing (ICAPC). IEEE, 2022. http://dx.doi.org/10.1109/icapc57304.2022.00007.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Uruno, Aya, Shinichiro Kikai, Yuri Suetsugu, and Masakazu Kobayashi. "Growth and solar cell applications of AgGaTe2 layers by closed space sublimation using the mixed source of Ag2Te and Ga2Te3." In 2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)]. IEEE, 2016. http://dx.doi.org/10.1109/iciprm.2016.7528605.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Schlecht, S., M. Yosef, and S. Weimer. "Synthesis and Characterization of nanoscale Bi2Te3, Sb2Te3, PbTe and Ag2Te powders: activated Metals and soluble Tellurium sources as synthetic Tools." In 2006 25th International Conference on Thermoelectrics. IEEE, 2006. http://dx.doi.org/10.1109/ict.2006.331224.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "Ag2TeNW"

Neyedley, K., J. J. Hanley, P. Mercier-Langevin, and M. Fayek. Ore mineralogy, pyrite chemistry, and S isotope systematics of magmatic-hydrothermal Au mineralization associated with the Mooshla Intrusive Complex (MIC), Doyon-Bousquet-LaRonde mining camp, Abitibi greenstone belt, Québec. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328985.

Повний текст джерела

Анотація:

The Mooshla Intrusive Complex (MIC) is an Archean polyphase magmatic body located in the Doyon-Bousquet-LaRonde (DBL) mining camp of the Abitibi greenstone belt, Québec. The MIC is spatially associated with numerous gold (Au)-rich VMS, epizonal 'intrusion-related' Au-Cu vein systems, and shear zone-hosted (orogenic?) Au deposits. To elucidate genetic links between deposits and the MIC, mineralized samples from two of the epizonal 'intrusion-related' Au-Cu vein systems (Doyon and Grand Duc Au-Cu) have been characterized using a variety of analytical techniques. Preliminary results indicate gold (as electrum) from both deposits occurs relatively late in the systems as it is primarily observed along fractures in pyrite and gangue minerals. At Grand Duc gold appears to have formed syn- to post-crystallization relative to base metal sulphides (e.g. chalcopyrite, sphalerite, pyrrhotite), whereas base metal sulphides at Doyon are relatively rare. The accessory ore mineral assemblage at Doyon is relatively simple compared to Grand Duc, consisting of petzite (Ag3AuTe2), calaverite (AuTe2), and hessite (Ag2Te), while accessory ore minerals at Grand Duc are comprised of tellurobismuthite (Bi2Te3), volynskite (AgBiTe2), native Te, tsumoite (BiTe) or tetradymite (Bi2Te2S), altaite (PbTe), petzite, calaverite, and hessite. Pyrite trace element distribution maps from representative pyrite grains from Doyon and Grand Duc were collected and confirm petrographic observations that Au occurs relatively late. Pyrite from Doyon appears to have been initially trace-element poor, then became enriched in As, followed by the ore metal stage consisting of Au-Ag-Te-Bi-Pb-Cu enrichment and lastly a Co-Ni-Se(?) stage enrichment. Grand Duc pyrite is more complex with initial enrichments in Co-Se-As (Stage 1) followed by an increase in As-Co(?) concentrations (Stage 2). The ore metal stage (Stage 3) is indicated by another increase in As coupled with Au-Ag-Bi-Te-Sb-Pb-Ni-Cu-Zn-Sn-Cd-In enrichment. The final stage of pyrite growth (Stage 4) is represented by the same element assemblage as Stage 3 but at lower concentrations. Preliminary sulphur isotope data from Grand Duc indicates pyrite, pyrrhotite, and chalcopyrite all have similar delta-34S values (~1.5 � 1 permille) with no core-to-rim variations. Pyrite from Doyon has slightly higher delta-34S values (~2.5 � 1 permille) compared to Grand Duc but similarly does not show much core-to-rim variation. At Grand Duc, the occurrence of Au concentrating along the rim of pyrite grains and associated with an enrichment in As and other metals (Sb-Ag-Bi-Te) shares similarities with porphyry and epithermal deposits, and the overall metal association of Au with Te and Bi is a hallmark of other intrusion-related gold systems. The occurrence of the ore metal-rich rims on pyrite from Grand Duc could be related to fluid boiling which results in the destabilization of gold-bearing aqueous complexes. Pyrite from Doyon does not show this inferred boiling texture but shares characteristics of dissolution-reprecipitation processes, where metals in the pyrite lattice are dissolved and then reconcentrated into discrete mineral phases that commonly precipitate in voids and fractures created during pyrite dissolution.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!