Papers by Vojtěch Wertich
Chpm2030 Deliverable D5.2: Economic Feasibility Assessment Methodology
Deliverable is focused on the description of economic related issues of two levels of the CHPM (C... more Deliverable is focused on the description of economic related issues of two levels of the CHPM (Combined Heat, Power and Metal extraction). Energy level, represented by enhanced geothermal system (EGS), is not a current rival to other conventional energy sources due to very high capital and operational costs. Simulations predict competitiveness of EGS in time framework<br> of CHPM development. Extraction of metals from geothermal fluid is a commercially untested technology, which has no clearly defined operation costs. This makes the economic feasibility assessment difficult. Theoretical models suggest that positive economic feasibility can be achieved only on sites with higher concentrations of dissolved metals in brines and/or higher fluid flow.
Chpm2030 Deliverable 5.1: Integrated Sustainability Assessment Framework
This document considers economical, social and environmental aspects of the proposed CHPM technol... more This document considers economical, social and environmental aspects of the proposed CHPM technology. Policy and ethical related issues will be discussed in a seprate work. The structure of the proposed framework was inspired by those industry standard documents that were conceived to ensure the sustainable operation of this specific field of industrial activity.
Deliverable is focused on social impact assessment and policy implications of the CHPM technology... more Deliverable is focused on social impact assessment and policy implications of the CHPM technology. A key aspect ensuring public acceptance of CHPM technology is the stakeholder engagement from the very beginning of a future CHPM project development. EU policy framework is very supportive for development of renewable energy sources and innovative low-impact mining methods. A combine innovative energy and raw materials target of CHPM technology is ahead of policies and legislative frameworks. Definitions of specific terms (EGS, EGS-orebody, etc.) and legislative unifying of both CHPM levels under one government authority will be key for CHPM development form a policy perspective.
This document considers economical, social and environmental aspects of the proposed CHPM technol... more This document considers economical, social and environmental aspects of the proposed CHPM technology. Policy and ethical related issues will be discussed in a separate work. The structure of the proposed framework was inspired by those industry standard documents that were conceived to ensure the sustainable operation of this specific field of industrial activity.
Energy Infrastructure and Exploration Areas
Cilem teto publikace je nabidnout zakladni porozuměni vybraným aspektům umisťovani energeticke in... more Cilem teto publikace je nabidnout zakladni porozuměni vybraným aspektům umisťovani energeticke infrastruktury. S ohledem na posledni vývoj v otazkach rozvoje elektrických siti v Německu, břidlicoveho plynu v řadě evropských statů nebo hledani lokality hlubinneho uložistě jaderneho odpadu se k těmto aspektům stavi s novým přistupem. Ambici publikace je představit sirsi veřejnosti některa specifika geologických aktivit, ktere souviseji s výstavbou energetických zařizeni vcetně ziskavani paliv a ktere jsou casto zmiňovany jako zdroj obav z hlediska dopadů na životni prostředi v regionu. Naznaceni charakteristiky a možne dynamiky spolecenskeho fenomenu lokalni opozice by potom mělo poukazat na nutnost větsiho zacleněni mistnich komunit do procesu výstavby, a to ve vsech jeho fazich. V tomto smyslu si tato publikace dava za cil přispět k lepsi informovanosti a vzajemne soucinnosti mezi uřady, investory a mistnimi komunitami.
Kulmské horniny z okolí Holasovic u Opavy jako potenciální zdroj pravěkých broušených artefaktů
Bakalařska prace řesi problematiku potencialniho zdroje na kamenne suroviny v okoli obce Holasovi... more Bakalařska prace řesi problematiku potencialniho zdroje na kamenne suroviny v okoli obce Holasovice u Opavy. V Holasovicich se v eneolitu nachazela dilna vyrabějici brousene artefakty. Těžebni misto můžeme přepokladat v sirsim okoli obce. Převladajici horninou, ktera byla použivana na výrobu artefaktů, je kulmska prachovita břidlice. Terenni etapa zahrnovala mapovani a popis výchozů kulmských hornin v okoli Holasovic. V laboratoři pak byl vzorky a výbrusy hornin i artefaktů studovany optickou mikroskopii. Výzkum ukazal, že nejbližsi kulmske horniny v casti udoli Heraltickeho potoka nazývaneho „Grundy“ jsou přilis zvětrale a nevhodne pro výrobu sekeromlatů. Ale patrani ve vzdalenějsich oblastech, předevsim v udoli potoka Hořiny s nazvem „Taborský les“ ukazalo zdejsi kulmskou prachovitou břidlici jako nezvětralou. Proto nelze vyloucit, že by toto misto mohlo být možným zdrojem hledaných surovin. Doklady o pravěke exploataci ci jakekoliv objevy pravěkých artefaktů dosud nebyly v prosto...
TIMA Bright Phase Search – Tracking Gold Losses using SEM Based Automated Mineralogical System
The assessment of processing efficiency becomes increasingly important in the light of current st... more The assessment of processing efficiency becomes increasingly important in the light of current stagnation in the commodity market. Specifically the drop of gold prices pushes many operations to its limits. This study focuses on capabilities of automated mineralogical analysis when searching for gold losses during the ore beneficiation process. The TIMA Bright Phase Search allowed for finding scarcely occurring gold grains in tailings in a fast and efficient way. The device was able to characterize gold grain size, locking and liberation degree in addition providing all necessary data to identify the exact cause gold loss.
Geochemické složení uraninitu ze západomoravských uranovýchložisek
Idealni vzorec uraninitu (UO2) neni v přirodnich podminkach běžný (Janezcek a Ewing 1992). Geoche... more Idealni vzorec uraninitu (UO2) neni v přirodnich podminkach běžný (Janezcek a Ewing 1992). Geochemicke složeni uraninitu odraži ctyři hlavni procesy: 1) substituce za U při primarni krystalizaci (např. Y, REE); 2) radioaktivni rozpad, vznik radiogenniho izotopy Pb; 3) inkorporace kationů, zejmena Ca, Si a Fe; a 4) oxidace U4+ na U6+ (Janeczek a Ewing 1992, Alexandre et al. 2016). Ukazuje se, že ve některých připadech je možne odlisovat od sebe uranova ložiska různe geneze na zakladě geochemicke složeni uraninitu (Frimmel et al. 2014, Alexandre et al. 2016).
Non-destrucitive Laboratory Assays of Magmatic Susceptibility and its Correlation with Measurement by Portable Kappameter. A Case Study: Stone Raw material, Artifacts
Bohatství země - Učební text pro analýzu ložisek nerostnýchsurovin
Ucebni text pro analýzu ložisek nerostných surovin vcetně jejich ekonomických, socialně-ekonomick... more Ucebni text pro analýzu ložisek nerostných surovin vcetně jejich ekonomických, socialně-ekonomických a enviromentalnich aspektů se zaměřwnim na ložiska zlata, uranu a ropy.
Mokrsko Gold Deposit: Cathodoluminescence Textures ofHydrothermal Quartz, Fluorite and Geochronology – SupportingEvidence for Intrusion Related Gold Deposit
Mokrsko gold deposit with its 100 t of reserves can be ranked among the most important gold depos... more Mokrsko gold deposit with its 100 t of reserves can be ranked among the most important gold deposits in the Europe. Although the intensive exploration works took place at the deposit, the origin of the deposit is still not completely resolved. Aim of the research, presented in this abstract, is to use a combination of modern analytical methods (including cathodoluminescence) allowing detailed analysis of ore-bearing hydrothermal quartz and contribute to the issue of the genesis of the deposit. Cathodoluminescence studies of samples from the deposit showed, that hydrothermal quartz has several generations, which point to changes of crystallization conditions during mineralizing events. First two generations of the quartz show partially preserved growth zoning and third generation recrystallization of fissures in veins. Complicated CL textures of hydrothermal quartz, presence of fluorite in gold-bearing ore structures, temporal and spatial relationship to intrusion of the Blatna suite...
CHPM2030 Deliverable D5.3: Self-Assessment Tool
This document serves as a user guide for the installation and work-flow of the CHPM SelfAssessmen... more This document serves as a user guide for the installation and work-flow of the CHPM SelfAssessment Tool. This tool is based on a system dynamics approach and uses the free software Vensim Model Reader. The CHPM Self-Assessment Tool allows to simulate revenue stream from both energy and metal extraction levels, and shows how it is influenced by costs, taxes, metal market, economic growth and other aspects. Users can modify values and compere graph outputs of different scenarios.
Energy Infrastructure and Exploration Areas. Characteristics,Relationships, and Local Acceptance
This book aims to describe exploration activities, their methods, and the impact they have on the... more This book aims to describe exploration activities, their methods, and the impact they have on their environment. In an accessible manner, it will also try to explain the legislative framework surrounding the issue of exploration areas and to explain how activities connected with building energy infrastructure may influence the public. The book deals with energy infrastructure on two levels: First, it looks at exploration areas when used to look for energy raw materials (natural resources which can be used as sources of energy), focusing on oil, gas and the front end of the nuclear fuel cycle, i.e. uranium prospects and mining, and the geological aspects of the rear end, i.e. localization and prospecting sites suitable for geological repository of the decommissioned nuclear fuel. Second, it focuses on the issue of local acceptance and local oppositions. It introduces the phenomena of local opposition, its most influential reflections in social science theory, and methodological tools...
Use of X-ray fluorescence spectrometry as a non-destructiveanalytical method in archaeology
Metamictization and fluid-driven alteration triggering massive HFSE and REE mobilization from zircon and titanite: Direct evidence from EMPA imaging and LA-ICP-MS analyses
Chemical Geology
Dual imaging of uranium ore by Laser Ablation Inductively Coupled Plasma Mass Spectrometry and Laser Induced Breakdown Spectroscopy
Spectrochimica Acta Part B: Atomic Spectroscopy
Minerals
We performed a detailed analysis of hydrothermal quartz at the Mokrsko gold deposit (Čelina, Mokr... more We performed a detailed analysis of hydrothermal quartz at the Mokrsko gold deposit (Čelina, Mokrsko-East, and Mokrsko-West deposits). Twenty-one samples were studied by scanning electron microscopy cathodoluminescence (CL) imagining, CL emission spectra and trace elements were measured on six selected samples. Four quartz growth generations Q1 to Q4 were described. Homogeneous early blue CL Q1 with initial emission spectra at 380 and 500 nm was observed at the Čelina deposit with typical titanium concentrations in the range of 20–50 ppm. Hydrothermal quartz at Mokrsko-West, which also includes early Q1, late subhedral faces of yellow CL Q2, and microfissures of greenish CL Q3 (both 570 nm), is characterized by titanium depletion. The titanium concentration is comparable to previous studies of crystallization temperatures proving titanium concentration in quartz as a good geothermal indicator. Q4, developed in microfissures only at Čelina, has no visual CL effect. Mokrsko-West is sp...
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Papers by Vojtěch Wertich