Sulphidic mineralization in the vicinity of the Bílina fault

Neoidní sulfidická mineralizace vyskytující se v terciérních sedimentech Lomu Bílina v lokalitě bílinského zlomu je hydrotermálního původu. Mineralizace je vázána na zlomové systémy oháreckého riftu. Teplota krystalizačních fluid se pohybovala kolem 50řC. Mineralizace bílinského zlomu je dosti jednotvárná, většinou se vyskytuje markazit bez stopových příměsí, dále čistý pyrit. Byly ale také zaznamenány zóny s obsahy stopových příměsí, především arsenu a niklu. Obsahy As obohacených růstových zón kolísaly od 0,2 - 5,4 hm. %, Ni bohaté zóny se pohybovaly v rozmezí 1,6-5,9 hm. %. Růstové zóny v agregátech se zvýšeným obsahem As a Ni byly velmi tenké, přínos fluid obohacených As a Ni zřejmě probíhal ve velmi krátkých časových periodách. Ve vzorcích markazitu byly dále nalezeny pórovité zóny mikroinkluzí jílových minerálů. Tyto zóny zvýšeného obsahu Al a Si kopírovaly růstové zóny jednotlivých krystalů. Disulfidy se na lokalitě vyskytují v hojném množství a to jak rozptýlené v uhelné sloji, tak vázané na tektonickou zónu bílinského zlomu. Pyrit a markazit rozptýlený v uhelné sloji geneticky nesouvisí se sulfidy vázanými na bílinský zlom.The neoidic sulphide mineralization located in tertiary sediments of Lom Bílina in Bílina's fault is of hydrothermal origin. The sulphidic mineralization is associated with fault systems of Eger rift and temperature of fluid crystallization was about 50řC. The mineralization of Bílina's fault is rather monotonous, the marcasite and pyrite is mostly found without a trace elements. In the crystals were also registered zones with the contents of trace elements, especially As and Ni. The contents of As enriched precipitation zones were fluctuating from 0,2 to 5,4 wt. %, Ni enriched zones were ranged from 1,6 to 5,9 wt. %. The precipitation zones with increased As and Ni content were very thin, there were very short time intervals of As and Ni enriched fluids precipitation. In the marcasite crystals were also found the porous zones of clay mineral microinclusions. These zones showed higher content of Al and Si. There is high abundance of Fe-disulfides at Bílina's fault-dispersed in coal bed, or bonded to tectonic zone of the Bílina's fault. Pyrite and marcasite are dispersed in the coal bed and genetially aren't related to sulphides bonded to Bílina's fault.Institute of Geochemistry, Mineralogy and Mineral ResourcesÚstav geochemie, mineralogie a nerostných zdrojůFaculty of SciencePřírodovědecká fakult

Sulphidic mineralization in the vicinity of the Bílina fault

Neoidní sulfidická mineralizace vyskytující se v terciérních sedimentech Lomu Bílina v lokalitě bílinského zlomu je hydrotermálního původu. Mineralizace je vázána na zlomové systémy oháreckého riftu. Teplota krystalizačních fluid se pohybovala kolem 50řC. Mineralizace bílinského zlomu je dosti jednotvárná, většinou se vyskytuje markazit bez stopových příměsí, dále čistý pyrit. Byly ale také zaznamenány zóny s obsahy stopových příměsí, především arsenu a niklu. Obsahy As obohacených růstových zón kolísaly od 0,2 - 5,4 hm. %, Ni bohaté zóny se pohybovaly v rozmezí 1,6-5,9 hm. %. Růstové zóny v agregátech se zvýšeným obsahem As a Ni byly velmi tenké, přínos fluid obohacených As a Ni zřejmě probíhal ve velmi krátkých časových periodách. Ve vzorcích markazitu byly dále nalezeny pórovité zóny mikroinkluzí jílových minerálů. Tyto zóny zvýšeného obsahu Al a Si kopírovaly růstové zóny jednotlivých krystalů. Disulfidy se na lokalitě vyskytují v hojném množství a to jak rozptýlené v uhelné sloji, tak vázané na tektonickou zónu bílinského zlomu. Pyrit a markazit rozptýlený v uhelné sloji geneticky nesouvisí se sulfidy vázanými na bílinský zlom.The neoidic sulphide mineralization located in tertiary sediments of Lom Bílina in Bílina's fault is of hydrothermal origin. The sulphidic mineralization is associated with fault systems of Eger rift and temperature of fluid crystallization was about 50řC. The mineralization of Bílina's fault is rather monotonous, the marcasite and pyrite is mostly found without a trace elements. In the crystals were also registered zones with the contents of trace elements, especially As and Ni. The contents of As enriched precipitation zones were fluctuating from 0,2 to 5,4 wt. %, Ni enriched zones were ranged from 1,6 to 5,9 wt. %. The precipitation zones with increased As and Ni content were very thin, there were very short time intervals of As and Ni enriched fluids precipitation. In the marcasite crystals were also found the porous zones of clay mineral microinclusions. These zones showed higher content of Al and Si. There is high abundance of Fe-disulfides at Bílina's fault-dispersed in coal bed, or bonded to tectonic zone of the Bílina's fault. Pyrite and marcasite are dispersed in the coal bed and genetially aren't related to sulphides bonded to Bílina's fault.Institute of Geochemistry, Mineralogy and Mineral ResourcesÚstav geochemie, mineralogie a nerostných zdrojůFaculty of SciencePřírodovědecká fakult

Fluorite mineralization of the Ohře Graben and comparison with similar deposit types worldwide.

SUMMARY: The thesis is concerned with fluid inclusions of fluorite deposits in Vrchoslav, summarizes the findings of the genesis of fluorite deposits in general and compares them with deposits of Ohře Rift.. Fluorite is an essential mineral that is used in industry as a raw material for the manufacture of plastics, liquids to transfer the cold, hydrofluoric acid, it is also used in metallurgy, glassmaking and clear crystals in optics

Fluorite mineralization of the Ohře Graben and comparison with similar deposit types worldwide.

SUMMARY: The thesis is concerned with fluid inclusions of fluorite deposits in Vrchoslav, summarizes the findings of the genesis of fluorite deposits in general and compares them with deposits of Ohře Rift.. Fluorite is an essential mineral that is used in industry as a raw material for the manufacture of plastics, liquids to transfer the cold, hydrofluoric acid, it is also used in metallurgy, glassmaking and clear crystals in optics

Fluorite mineralization of the Ohře Graben and comparison with similar deposit types worldwide.

SUMMARY: The thesis is concerned with fluid inclusions of fluorite deposits in Vrchoslav, summarizes the findings of the genesis of fluorite deposits in general and compares them with deposits of Ohře Rift.. Fluorite is an essential mineral that is used in industry as a raw material for the manufacture of plastics, liquids to transfer the cold, hydrofluoric acid, it is also used in metallurgy, glassmaking and clear crystals in optics

Sulphidic mineralization in the vicinity of the Bílina fault

The neoidic sulphide mineralization located in tertiary sediments of Lom Bílina in Bílina's fault is of hydrothermal origin. The sulphidic mineralization is associated with fault systems of Eger rift and temperature of fluid crystallization was about 50řC. The mineralization of Bílina's fault is rather monotonous, the marcasite and pyrite is mostly found without a trace elements. In the crystals were also registered zones with the contents of trace elements, especially As and Ni. The contents of As enriched precipitation zones were fluctuating from 0,2 to 5,4 wt. %, Ni enriched zones were ranged from 1,6 to 5,9 wt. %. The precipitation zones with increased As and Ni content were very thin, there were very short time intervals of As and Ni enriched fluids precipitation. In the marcasite crystals were also found the porous zones of clay mineral microinclusions. These zones showed higher content of Al and Si. There is high abundance of Fe-disulfides at Bílina's fault-dispersed in coal bed, or bonded to tectonic zone of the Bílina's fault. Pyrite and marcasite are dispersed in the coal bed and genetially aren't related to sulphides bonded to Bílina's fault

Sulphidic mineralization in the vicinity of the Bílina fault

The neoidic sulphide mineralization located in tertiary sediments of Lom Bílina in Bílina's fault is of hydrothermal origin. The sulphidic mineralization is associated with fault systems of Eger rift and temperature of fluid crystallization was about 50řC. The mineralization of Bílina's fault is rather monotonous, the marcasite and pyrite is mostly found without a trace elements. In the crystals were also registered zones with the contents of trace elements, especially As and Ni. The contents of As enriched precipitation zones were fluctuating from 0,2 to 5,4 wt. %, Ni enriched zones were ranged from 1,6 to 5,9 wt. %. The precipitation zones with increased As and Ni content were very thin, there were very short time intervals of As and Ni enriched fluids precipitation. In the marcasite crystals were also found the porous zones of clay mineral microinclusions. These zones showed higher content of Al and Si. There is high abundance of Fe-disulfides at Bílina's fault-dispersed in coal bed, or bonded to tectonic zone of the Bílina's fault. Pyrite and marcasite are dispersed in the coal bed and genetially aren't related to sulphides bonded to Bílina's fault

Single-fraction stereotactic radiosurgery versus microsurgical resection for the treatment of vestibular schwannoma: a systematic review and meta-analysis

Background: Vestibular schwannomas are benign tumours for which various treatments are available. We performed a systematic review of prospective controlled trials comparing the patient-relevant benefits and harms of single-fraction stereotactic radiosurgery (sfSRS) with microsurgical resection (MR) in patients with vestibular schwannoma. Methods: We searched for randomized controlled trials (RCTs) and non-randomized prospective controlled trials in MEDLINE, Embase, the Cochrane Central Register of Controlled Trials, and study registries (last search: 09/2021) and also screened reference lists of relevant systematic reviews. Manufacturers were asked to provide unpublished data. Eligible studies investigated at least one patient-relevant outcome. We assessed the risk of bias (high or low) at the study and outcome level. If feasible, meta-analyses were performed. We graded the results into different categories (hint, indication, or proof of greater benefit or harm). Results: We identified three non-randomized prospective controlled trials of generally low quality with evaluable data on 339 patients with unilateral vestibular schwannoma. There was an indication of greater benefit of sfSRS compared with MR for facial palsy (OR 0.06, 95% CI 0.02-0.21, p < 0.001, 2 studies), hearing function (no pooled estimate available, 2 studies), and length of hospital stay (no pooled estimate available, 2 studies). We found no clinically relevant differences for mortality, vertigo, headaches, tinnitus, balance function, work disability, adverse events, and health-related quality of life. Conclusions: Our systematic review indicates that sfSRS has greater benefits than MR in patients with unilateral vestibular schwannoma. However, it is unclear whether this conclusion still holds after 2 years, as long-term studies are lacking. It is also unclear whether the effects of sfSRS are similar in patients with bilateral vestibular schwannomas. Long-term prospective studies including patients with this condition would therefore be useful