Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Stephen L. Chryssoulis"'
Autor:
Martin Reich, Jackie Wrage, Daniele Tardani, Pablo Sanchez-Alfaro, Malcolm P. Roberts, Artur P. Deditius, Stephen L. Chryssoulis
Publikováno v:
Geochimica et Cosmochimica Acta
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Over the past few decades several studies have reported that pyrite hosts appreciable amounts of trace elements which commonly occur forming complex zoning patterns within a single mineral grain. These chemical zonations in pyrite have been recognize
Autor:
Jian-Wei Li, Artur P. Deditius, Stephen L. Chryssoulis, Miguel Ángel Parada, Fernando Barra, Chan-Qiang Ma, Martin Reich, Florian Mittermayr
Publikováno v:
Geochimica et Cosmochimica Acta
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
GEOCHIMICA ET COSMOCHIMICA ACTA
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
GEOCHIMICA ET COSMOCHIMICA ACTA
Porphyry copper deposits are currently the world's largest source of copper and molybdenum, and are also among the largest reservoirs of gold in the upper crust. Despite the fact that pyrite is a ubiquitous mineral phase in these deposits and seconda
Autor:
Stephen L. Chryssoulis, Rodney C. Ewing, Daniela Venter, Stephen E. Kesler, Artur P. Deditius, Satoshi Utsunomiya
Publikováno v:
Geology. 37:707-710
Cu-rich and As-rich growth zones in pyrite provide new insights into the composition of late-stage magmatic fluids and their host hydrothermal ore deposits. The pyrite is from the Pueblo Viejo (Dominican Republic) and Yanacocha (Peru) high-sulfidatio
Autor:
Stephen L. Chryssoulis, Satoshi Utsunomiya, Rodney C. Ewing, Christopher S. Palenik, Stephen E. Kesler, Martin Reich
Publikováno v:
Geochimica et Cosmochimica Acta. 69:2781-2796
Although Au and As can be enriched up to the weight percent level in arsenian pyrite, there is little knowledge of their limiting concentrations and nature of incorporation. This study reports SIMS and EMPA analyses showing that As and Au contents of
Publikováno v:
JOM. 56:58-62
Mineralogical studies have consistently revealed that flaky gold is common in the tailings from both gravity and flotation circuits, where it can be a significant contributor to losses. A combination of case study and laboratory data has been used to
Publikováno v:
JOM. 56:53-57
This treatise offers a brief but comprehensive glimpse of how microbeam analytical techniques have been applied over the last 20 years to resolve problems in gold ore processing. It covers only those techniques that are being used on a routine basis
Autor:
Pamela B. Zohar, Jeffrey C. Alt, Zaojun Ye, Daniel P. Core, Jeff Borhauer, Stephen E. Kesler, John Fortuna, Stephen L. Chryssoulis
Publikováno v:
Economic Geology. 98:1137-1157
This study was undertaken to evaluate the relation between sulfidation and gold deposition in the Screamer section of the Betze-Post Carlin-type deposit. We also attempted to determine the source of sulfur in the deposit and the possibility that more
Publikováno v:
Economic Geology. 98:479-493
Gold is found in three different forms in the Emperor gold deposit: as "invisible" or submicrometer-size inclusions of gold in arsenian pyrite, as visible native gold and/or electrum, and as tellurides (calaverite, krennerite, sylvanite, and petzite)
Publikováno v:
Ore Geology Reviews. 21:103-124
Porphyry copper deposits are among the largest reservoirs of gold in the upper crust and are important potential sources for gold in lower temperature epithermal deposits. Whether gold remains in porphyry copper deposits is important both to their ec
Publikováno v:
Economic Geology. 95:259-270
Experiments in the system Au-Cu-Fe-S were carried out at temperatures of 400° to 700°C to determine how much gold could be accommodated by bornite and chalcopyrite, the two most common ore minerals in porphyry copper-gold deposits. Our results show