Welcome from the Chairs
Instructions for Authors
Authors are encouraged to prepare a presentation in PowerPoint or similar software, to be displayed online along with the Manuscript. Slides, if available, will be displayed directly in the website using Sciforum.net's proprietary slides viewer. Slides can be prepared in exactly the same way as for any traditional conference where research results can be presented. Slides should be converted to the PDF format before submission so that our process can easily and automatically convert them for online displaying.
Besides their active participation within the forum, authors are also encouraged to submit video presentations. If you are interested in submitting, please contact the conference organizer ([email protected]) to get to know more about the procedure. This is an unique way of presenting your paper and discuss it with peers from all over the world. Make a difference and join us for this project!
Posters will be available on this conference website during and after the event. Like papers presented on the conference, participants will be able to ask questions and make comments about the posters. Posters that are submitted without paper will not be included in the proceedings of the conference.
List of accepted submissions (11)
|sciforum-020750||A review on the critical and rare metals distribution throughout the Vertiskos Unit, N.Greece||Christos Stergiou, Vasilios Melfos, Panagiotis Voudouris||
The undisturbed supply of critical and rare metals is critical for the robustness and sustainability of the advanced technological industry of the European Union (EU). Large demands and a low domestic production characterize the availability of these mineral resources within the EU. Since 2008, several EU funded research projects have highlighted the domestic exploration and exploitation possibilities of some specific European regions. Throughout the SE Europe the Serbo-Macedonian metallogenic province (SMMP) in northern Greece is highlighted as one of the most promising exploration targets. The metamorphic terrain of the Vertiskos Unit forms the geological basement of the SMMP in northern Greece, and hosts several Oligocene-Miocene ore deposits and mineralization occurrences. Ancient and modern mining activities mostly targeted the southern part of the Greek SMMP (Chalkidiki Peninsula), while the northern part was subjected to a diachronic occasional pre-industrial exploitation. Thus, by taking into consideration the modern exploration and exploitation techniques, the northern part could be characterized as a greenfield area. The base (Cu, Pb, Zn, Fe, Mn) and precious (Au, Ag) metals endowment of the Vertiskos Unit is well-documented and among the most important mineralization of the region are the Pontokerasia Cu-Mo-Au-porphyry deposit, the Vathi Cu-Au-U±Mo porphyry deposit, and the Skouries Cu-Au porphyry deposit. However the critical and rare metals endowment of the region lacks any thorough examination. Several porphyry mineralizations hosted in high-K calc-alkaline magmatic rocks (e.g. Vathi, Gerakario, Skouries), and vein type mineralization hosted in shear-zones (e.g. Rizana, Stanos, Kolhiko, Laodikino, Stefania, Koronouda, Drakontio, Nea Madytos) are reported being enriched in Sb, Bi, Te, Co, Sn, W, Ga, Ge, In, Ta, REEs and PGEs. In this publication we review the critical and rare metals endowment of these ore mineralizations in an effort to summarize and highlight the exploration potential of the region.
|sciforum-020323||Biomineraization in Sarcocornia pruinosa growing in the tidal area of Río Tinto, an extreme acidic environment.||Vicenta de la Fuente, Lourdes Rufo, Irene Sanchez- Gavilan, Esteban Ramirez, Nuria Rodriguez, Ricardo Amils||N/A||
We present the localization of Na, Ca, Mg and Fe biominerals in Sarcocornia pruinosa (Chenopodiacaeae), a halophyte species that grow in the estuarine area of the Río Tinto basin. The estuarine soils of the Tinto basin are characterized by an extreme low pH, a slightly high salinity and high concentration of S and Fe, together with Na, Mg, P, Cu and Zn salts. It is exposed to the daily tides, with the correspondent increase in the pH and the concentrations of Na and Mg.
The aim of this work was to characterize the elemental composition and identify the biominerals and their distribution in different organs and tissues of S. pruinosa.
Analytical techniques (ICP-MS), X-Ray diffraction and microscopy such as OM (optical microscopy) with histochemical staining (Prussian blue stain), SEM and TEM (scanning and transmission electronic microscopy) coupled with EDX (energy dispersive X-ray) have been used to analyze the plant tissues, for mineral characterization.
A high accumulation of salts has been observed in all the analyzed parts, highlighting the high content of Na and K between the major elements, followed by Ca, Mg, together with a high concentration of Fe, Cu, Zn and Mn.
We documented the occurrence of halite, silvite, whewellite, weddellite, glushinkite and Fe oxides as biominerals in S. pruinosa. We highlight the scarcity of data related to the presence of these biominerals in plants. Our data suggest the importance of plants in the biogeochemical cycles in the estuarine areas.
|sciforum-020778||Boiling assemblages in the Kupel occurrence, Krumovgrad goldfield, SE Bulgaria||Irina Marinova, Elena Tacheva||
This paper presents a study on boiling assemblages in the Kupel occurrence, as boiling was evidenced by the presence of vein adularia and platy calcite. Fluid inclusion evidence is not available since the present fluid inclusions are very small in size for investigation under optical microscope. Boiling assemblages occur in two types of auriferous mineralization hosted by supradetachment, grey fine-grained arkosic sandstones and presented by (i) veinlets of quartz-adularia and (ii) veinlets of platy calcite. In quartz-adularia veinlets micron-sized electrum aggregates form globular shapes, which reach 800 µm across and are arranged along the veinlet length. In cross-sections electrum aggregates display abundant silicate-filled pores of a few microns in size. Globular geometry of the electrum aggregates and their arrangement along the veinlet length suggest collectively that these globules were flowing particles - flocs but not colloidal particles since the latter are much smaller. In these veinlets electrum is intergrown with micron-sized chalcopyrite, galena, hessite and greenockite. The auriferous calcite veinlets are formed later than the auriferous quartz-adularia ones, since the first clearly has intersected or brecciated the latter. Electrum in the calcite veinlets forms accumulations only in portions of sharp thickness expansions after throttle portions, which are barren. This suggests that electrum has been transported by a flowing fluid, in a particulate form and deposited due to pressure drop during hydrofracturing, as the electrum particles have been arrested in low velocity (expanded) portions of ore conduits. The auriferous assemblages in the Kupel occurrence indicate high effectiveness of boiling for deposition of Au, Ag, Cu, Pb, Cd and Te through collective loss of H2, CO2, H2S and H2Te what is in complete accord with recent studies on modern terrestrial geothermal fields. Methods used comprise observations under binocular, optical and scanning electron microscope, and electron microprobe analysis.
|sciforum-019832||Cr release from Cr-substituted goethite during the aqueous Fe(II)-induced recrystallization||Jian Hua, Manjia Chen, Chengshuai Liu, Fangbai Li, Jian Long, Ting Gao, Fei Wu, Jing Lei, Minghua Gu||
The interaction between aqueous Fe(II) (Fe(II)aq) and iron (hydr)oxides is an important reaction of iron cycle and plays a critical role in the environmental behavior of heavy metal in soils. The metal substitution has been reported to decrease the Fe atom exchange rates between the Fe(II)aq and metal-substituted iron (hydr)oxides as well as inhibiting the recrystallization of iron (hydr)oxides, whereas the environmental behaviors of the substituted metal during the processes remain unclear. In this study, Fe(II)aq-induced recrystallization of Cr-substituted goethite (Cr-goethite) and the sequentially release of substituted Cr were investigated under different conditions. The results of stable Fe isotopic tracer and Mössbauer characterization studies show that Fe atom exchange occurred between Fe(II)aq and structural Fe(III) in Cr-goethites, during which Cr-goethites were recrystallized. The Cr substitution inhibited the rates of Fe atom exchange and Cr-goethite recrystallization. During the processes, Cr were released from Cr-goethite and Cr-goethites with higher Cr-substituted contents released more. Highest Fe atom exchange rate and most amount of Cr release were observed at pH 7.5, while no change in mineral phase after reaction for 30 days. At a lower pH of 5.5 or a higher pH of 8.5, significantly less exchange and Cr release occurred. The releases of Cr were positively correlated with the Fe atom exchanges rates, suggesting the driving force of sorbed Fe(II) for the Fe atom exchange and Cr release. The release and re-incorporation of Cr simultaneously occurred during the Fe(II)aq-induced recrystallization of Cr-goethites, especially at the late stage of the reactions. Our findings indicate that dynamic changes of Cr forms relating to Fe(II)aq-induced recrystallization of iron (hydr)oxides should be considered when evaluating the soil Cr pollution in Fe-rich soils.
|sciforum-020648||First zunyite-bearing lithocap in Greece: The case of Konos Hill Mo-Re-Cu-Au porphyry system.||Constantinos Mavrogonatos, Panagiotis Voudouris, Paul Spry, Vasilios Melfos, Stephan Klemme, Jasper Berndt, Robert Moritz, Christos Kanellopoulos||
Zunyite is a rare F- and Cl- bearing mineral related to advanced argillic alteration zones of porphyry/epithermal style mineralization and is considered as a pathfinder mineral towards high-grade Au ores. We report here the first occurrence of zunyite along with alunite, quartz, APS minerals, diaspore, pyrophyllite and kaolinite in the metallogenic province of Western Thrace.
The Konos Hill prospect in Western Thrace comprises a telescoped porphyry Mo-Re-Cu-Au system, overprinted by high-sulfidation mineralization. In low topographic levels, porphyry-style mineralization is exposed and comprises pyrite-chalcopyrite-bornite-molybdenite-rheniite-bearing quartz-stockwork. Host rocks are subvolcanic bodies of granodioritic composition that have suffered pervasive sericitic alteration. High-sulfidation epithermal-style alteration occupies the higher topographic levels and has caused significant overprinting of the porphyry-style mineralization and alteration. It consists of silicified zones related to N-S and E-W trending faults, which grade outwards to advanced argillic alteration assemblages. These assemblages are characterized by abundant alunite and quartz, with minor presence of diaspore, APS minerals, kaolinite, pyrophyllite and zunyite.
Zunyite forms euhedral crystals that reach in size up to 300μm. They sometimes include minor quartz and are associated with alunite, APS minerals and pyrophyllite. EPMA data revealed variations in the F and Cl content of zunyite, that range between 3.62-6.54 wt.% and 2.65-3.15 wt.% respectively. Alunite supergroup minerals display a wide compositional range and are represented by members of the alunite, beudanite and plumbogummite subgroups. Alunite and natroalunite constitute the most common advanced-argillic alteration minerals and are found in both quartz+zunyite and quartz+diaspore+pyrophyllite assemblages. Available mineral-chemical data favor the existence of compositions that cover a complete solid-solution series between Na- and K-rich varieties. Common mode occurrences comprise euhedral, tabular-shaped and rarely pseudocubic crystals. APS minerals are usually found as pseudocubic crystals forming the cores of tabular alunites. Analyzed compositions comprise woodhouseite (Sr-, Ce- and Sr-Ce- rich members were found). Diaspore forms aggregates of euhedral, coarse-grain crystals scattered in strongly silicified rock. Finally, pyrophyllite when present, forms acicular aggregates in the matrix along with diaspore and quartz.
Available data suggest that the formation of the studied advanced argillic alteration assemblages is hypogene and due to ascending magmatic fluids released by the subvolcanic bodies. Mineralogical variances in the different assemblages may reflect distinct degrees of hydrothermal alteration. Co-existence of zunyite, APS minerals and pyrophyllite could be used to set constraints on the physicochemical conditions of formation of the assemblage, as the volatile-rich nature of the minerals reflects a narrow range of pH and temperature in hydrothermal systems.
Prof. Dr. Paul Sylvester
Texas Tech University, USA
Prof. Dr. Saeed Chehreh Chelgani, University of Michigan, USA
Prof. Dr. Karen Hudson-Edwards, University of Exeter, UK
Prof. Dr. David Chew, Trinity College Dublin, Ireland
Assoc. Prof. Panagiotis Voudouris, National and Kapodistrian University of Athens, Greece
Dr. Sytle M. Antao, University of Calgary, Canada
Dr. Runliang Zhu, Guangzhou Institute of Geochemistry Chinese Academy of Sciences, China
Scientific Advisory Committee Members
Prof. Dr. Antonio Simonetti, University of Notre Dame, USA
Dr. Zhiyong Gao, Central South University, China
Dr. Pablo Cubillas, Durham University, UK
Ms. Sweater Shi
E-Mail: [email protected]
Call for Papers
The section Chairs and the scientific committee members are pleased to announce the Call for Papers for the 1st International Electronic Conference on Mineral Science and to invite each researcher working in this exciting field of science to share his/her recent results with his/her colleagues around the world.
The conference will be organized into six sections, which reflect the minerals and mineralogy. It will cover a wide range of aspects, please see the details in each section.
Researchers are invited to provide a short abstract on line at http://www.sciforum.net/login from now until 31 May 2018. Acceptance will be notified within two weeks after submission of the abstract. Then the author(s) will be asked to submit the manuscript, optionally along with a slide show (PPT) (or a video) using the template provided by the conference (see Instructions for Authors). All accepted submissions will be displayed online, at https://sciforum.net/conference/IECMS2018, for discussion during 16-31 July 2018.
Accepted papers will be published in the Journal Proceedings. After the conference, the authors are recommended to submit an extended version of the proceeding papers to the Minerals Special issue with 20% discount of the APC charges.
The Scientific Committee looks forward to receiving contributions in response to this call and will be glad to provide any further information to interested parties. Questions may be addressed to the conference organizer at [email protected] or Minerals editorial office at [email protected].
We thank you in advance for your attendance of this conference and look forward to a stimulating exchange.
A. Mineral Processing
Prof. Dr. Saeed Chehreh Chelgani, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, USA
As high grade ores have been somewhat depleted, low grade complex deposits are becoming the main source of valued minerals. These disseminated and complicated ores, however, include a huge amount of non-value (unwanted) minerals. The main purpose of mineral processing is to reduce the bulk of the ore which must then be transported to and processed in the smelter. In other words, mineral processing is a combination of relatively cheap methods for separating the valuable minerals from the waste non-value (gangue) minerals. Size (liberation) and mineral properties are two general factors taken into account in mineral separation and processing. Papers for this Section on mineral processing include, without being limited to, the following themes:
- Gravity separation
- Magnetic separation
- Froth flotation
B. Environmental Mineralogy
Prof. Dr. Karen Hudson-Edwards, Environment & Sustainability Institute and Camborne School of Mines, University of Exeter, Penryn Cornwall TR10 9DF, UK
Environmental minerals, like “traditional” minerals, are naturally-occurring solids with definite chemical compositions. Unlike “traditional” minerals, however, they can be formed by both inorganic and organic processes, range from very poorly crystalline to crystalline, and are found in natural and engineered environments such as mines or nuclear waste disposal sites, or biological systems such as the human body. Environmental minerals control the transport and availability of nutrients and contaminants in waters, soils, sediments and dusts. The Environmental Mineralogy Section invites contributions on, but not restricted to, the following themes:
- Characterisation of environmental minerals in Earth surface environments
- Uptake of contaminants and nutrients in environmental minerals
- The environmental mineralogy of mine wastes, contaminated soils, dusts and nuclear wastes
- Environmental biominerals in Earth surface systems and the human body
- Bacteria, archaea, fungi and the formation of environmental minerals
C. Mineral Deposits
Assoc. Prof. Panagiotis Voudouris, National and Kapodistrian University of Athens, 157 84 Athens, Greece
Mineral deposits are an essential supply of appropriate commodities for global industrialization. They often show specific associations with particular geologic terrains and vary in abundance as a function of geological time. Many factors are important for the formation of the mineral deposits, including the geotectonic environment, regional structural control, the petrography and geochemistry of the host rocks, the geochemistry of the ore-forming fluids, and the mineral paragenesis, textures and chemistry, etc. These factors affect exploration projects and the mining and extraction processes of the companies which invest considerable amounts of capital to extract the metals, minerals and rocks from deep in the Earths’ crust. Ore-forming models have been generated based on these factors but need modifying as the results of new research are forthcoming. Here, we evaluate how ore deposits form and the ways minerals can be used as pathfinders to the discovery of new deposits.
The Mineral Deposits section is open for contributions on, but not restricted to, the following topics:
- Mineralogy of precious, rare and critical metals in magmatic-hydrothermal ore deposits
- Mineralogy of supergene ore deposits
- The use of mineral compositions in the search for mineral deposits
- Indicator minerals as vectors to ore deposits
- Metal enrichment in existing ore deposits as a result of igneous and metamorphic processes
D. Mineral Geochemistry and Geochronology
Prof. Dr. David Chew, Department of Geology, Trinity College Dublin, Dublin 2, Ireland
Many new discoveries are being made and problems encountered in the geosciences by looking at individual minerals in exquisite detail at a microscopic level. The "Mineral Geochemistry and Geochronology" Section invites contributions that improve our understanding of the Earth and Solar System using techniques capable of analysing mineral samples at high spatial and temporal resolution.
Contributions on, but not restricted to, the following topics are welcomed:
- Exploration and mining geology
- Advances in mineral analytical techniques
- Innovations in accessory mineral U-Th-Pb petrochronology
- Mineral geochemistry applied to ore deposit processes
- Geochronology and thermochronology applied to geological processes
E. Chemistry and Crystallography of Mineralogical Materials
Dr. Sytle M. Antao, Department of Geoscience, University of Calgary, Calgary, Alberta T2N 1N4, Canada
The Chemistry and Crystallography Section covers all fundamental aspects of chemistry, crystal structure determination and refinements, properties, phase transitions, and formation conditions of materials of mineralogical interests. We invite contributions to the following topics:
- New approaches in mineralogy, crystallography, and mineral physics
- Ambient and non-ambient crystal chemistry
- Synchrotron and neutron techniques used to investigate material properties
- Reconstructing mineral history and formation conditions
- Biominerals and applications of mineralogy in medicine
F. Nanominerals and Mineral Surfaces
Dr. Runliang Zhu, Guangzhou Institute of Geochemistry Chinese Academy of Sciences, Guangzhou 510640, China
Mineral surfaces have drawn the interest of scientific communities from several disciplines, in particular earth, environmental, geochemical, soil, and mineral sciences, as a variety of reactions can take place on mineral surfaces, including surface hydration, hydroxylation, adsorption/desorption, surface precipitation, crystal growth, mineral dissolution, oxidation/reduction, catalysis, etc. These reactions then play a central role in many important processes taking place on earth, e.g., the formation and weathering of minerals and rocks; the formation of ore deposits; the formation of soil; geochemical cycling of the elements (with those related to sustainable development of the environment being of particular concern); bioavailability of contaminants and nutrients; self-cleaning of the environment; recording of environmental information; the origins of life. In addition, these reactions can also be applied for various purposes, such as ore processing and extraction, synthesis and applications of mineral-based materials (e.g., mineral-based catalysts, adsorbents, and flocculants).
Modern characterization techniques (e.g., synchrotron-based spectroscopic and scattering methods) in combination with molecular modelling methods, provide atomic-level information to help understand the microstructure and physicochemical properties of minerals surfaces and the reactions that take place. Significant advances have been achieved in this research area in recent decades. However, there is much left to be discovered, particularly because reactions on mineral surfaces are closely related to the environmental quality of near-surface earth, and the sustainable development of humanity.
Nanominerals and mineral nanoparticles are widely distributed in soil, the atmosphere, oceans, groundwater and surface waters, and even in living organisms. Due to the significant size-effects and large portion of surface atoms, nanominerals and mineral nanoparticles are expected to have large mineral surfaces and strong surface reactivity. In this regard, nanominerals and mineral nanoparticles play an important role in a variety of earth and environmental processes, and have been the subject of much current research. The strong surface reactivity of nanominerals and mineral nanoparticles makes them prominent geosorbents and natural catalysts, affecting the geochemical cycling of elements, formation/dissolution of minerals, environmental fate of contaminants, self-cleaning of contaminated sites, etc.
Similarly, in recent years, modern characterization techniques (e.g., powerful high-resolution transmission electron microscopes) help significantly for exploring the microstructure, physicochemical properties, and geochemical behaviors of nanominerals and mineral nanoparticles. However, there still remains huge gaps in our understanding of this research area.
This electronic conference intends to establish a platform for exchanging recent advances in the fields of minerals surfaces and nanominerals, which covers the broad scope of studies mentioned above.