Collected Item: “Micro- to nanoscale textures of gold in arsenopyrite and scorodite from the As-Au-Bi assemblage of Drenjak locality (Serbia)”
Врста публикације
Рад у часопису
Верзија рада
објављена верзија
Језик рада
енглески
Аутор/и (Милан Марковић, Никола Николић)
Ivana Jelić, Janez Zavašnik, Marina Lazarov, Alena Zdravković, Sabina Kovač, Jovica Stojanović, Aleksandar Pačevski
Наслов рада (Наслов - поднаслов)
Micro- to nanoscale textures of gold in arsenopyrite and scorodite from the As-Au-Bi assemblage of Drenjak locality (Serbia)
Наслов часописа
Ore Geology Reviews
Издавач (Београд : Просвета)
Elsevier BV
Година издавања
2023
Сажетак на енглеском језику
Arsenopyrite and pyrite are important carriers of Au that is present in the form of microscopic and “invisible” gold. Such gold can be expected to be released upon the process of oxidation of these sulfides. In studied gold mineralization at Drenjak, related to the granitoids of the Oligocene-Miocene Kopaonik Ore District, the main arsenopyrite-pyrite-(bismuthinite) sulfide assemblage was formed in the quartz bodies and partly replaced by scorodite (FeAsO4·2H2O) and Bi-arsenate. With only up to 5 ppm of gold recorded by LA-ICP-MS, aforementioned sulfide minerals are here practically free from lattice-bound gold. Native gold is present in the mineralization, generally ranging in grain size from 20 µm down to the nanoparticles, as revealed by TEM. It is mainly hosted by arsenopyrite and scorodite. In arsenopyrite, gold is polycrystalline and consists of nanocrystallites 20–30 nm in size. It was deposited after arsenopyrite, healing its cavities and microcracks, often associated with native bismuth and bismuthinite. The abundance of gold and Bi minerals correlates with the presence of scorodite. Two types of gold are present in scorodite and Bi arsenate: i) prevailing relict Au grains retained after arsenopyrite oxidation, ii) colloidal-like gold co-precipitated with the arsenates. Based on our observations, we additionally present and discuss indications of low-temperature hydrothermal origin of scorodite, formerly known only as a weathering product.
Волумен/том или годиште часописа
163
Број часописа
163
Укупан број страна рада (уколико не постоји пагинација)
14
DOI број
10.1016/j.oregeorev.2023.105711
ISSN број часописа
0169-1368
Кључне речи на српском (одвојене знаком ", ")
Economic Geology,Geochemistry and Petrology,Geology
Кључне речи на енглеском (одвојене знаком ", ")
Economic Geology,Geochemistry and Petrology,Geology
Линк
https://api.elsevier.com/content/article/PII:S0169136823004274?httpAccept=text/xml
Шира категорија рада према правилнику МПНТ
M20
Ужа категорија рада према правилнику МПНТ
М21
Пројект у склопу кога је настао рад
451-03-47/2023-01/200126
Степен доступности
Отворени приступ
Лиценца
Creative Commons – Attribution-NonComercial-No Derivative Works 4.0 International
Формат дигиталног објекта
.pdf