CCL

Összesen 5 találat.
#/oldal:
Részletezés:
Rendezés:

1.

001-es BibID:BIBFORM106600
035-os BibID:(cikkazonosító)8 (WoS)000926809000001 (Scopus)85146678067
Első szerző:B. Kiss Gabriella
Cím:Tracing the Source of Hydrothermal Fluid in Ophiolite-Related Volcanogenic Massive Sulfide Deposits : A Case Study from the Italian Northern Apennines / Gabriella B. Kiss 1, Kata Molnár, Zsolt Benkó, Péter Skoda, Zsuzsanna Kapui, Giorgio Garuti, Federica Zaccarini, László Palcsu, György Czuppon
Dátum:2022
ISSN:2075-163X
Megjegyzések:The Italian Northern Apennines contain several Fe-Cu-Zn-bearing, Cyprus-type volcanogenic massive sulfide (VMS) deposits, which significantly contribute to the Cu resources of Italy. The massive sulfide lenses and related stockwork mineralizations are hosted by several levels (from basalt to serpentinite) of the unmetamorphosed ophiolitic series; therefore, this region offers perfect locations to study the ore-forming hydrothermal system in detail. A combination of fluid inclusion microthermometry, Raman spectroscopy, electron probe analyses (chlorite thermometry) and stable and noble gas isotope geochemistry was used to determine the fluid source of the VMS system at Bargone, Boccassuolo, Campegli, Casali-Monte Loreto, Corchia, Reppia and Vigonzano. This question of the fluid source is the focus of modern VMS research worldwide, as it has a direct influence on the metal content of the deposit. The obtained temperature and compositional data are both in the typical range of VMS systems and basically suggest evolved seawater origin for the mineralizing fluid. Modification of seawater was most commonly due to fluid-rock interaction processes, which happened during long-lasting circulation in the crust. The role of a small amount of magmatic fluid input was traced only at the lower block of Boccassuolo, which may be responsible for its higher ore grade. This fluid origin model is evidenced by O, H and C stable isotopic as well as He, Ne and Ar noble gas isotopic values.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Cyprus-type VMS
Italian ophiolite
fluid inclusion study
stable isotope geochemistry
noble gas isotope geochemistry
Megjelenés:Minerals. - 13 : 1 (2022), p. 1-18. -
További szerzők:Molnár Kata Benkó Zsolt (1980-) (geológus) Skoda Péter Kapui Zsuzsanna Garuti Giorgio Zaccarini Federica Palcsu László (1975-) (fizikus) Czuppon György
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

2.

001-es BibID:BIBFORM055448
Első szerző:Püspöki Zoltán (geológus)
Cím:Geochemical Records of a Bentonitic Acid-Tuff Succession Related to a Transgressive Systems Tract : Indication of Changes in the Volcanic Sedimentation Rate / Z. Püspöki, M. Kozák, P. Kovács-Pálffy, J. Szepesi, R. McIntosh, P. Kónya, L. Vincze, G. Gyula
Dátum:2008
ISSN:0009-8604
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
acid-tuff sedimentation
bentonites
geochemistry
sediment condensation
sequence stratigraphy
Megjelenés:Clays And Clay Minerals. - 56 : 1 (2008), p. 23-38. -
További szerzők:Kozák Miklós (1948-) (geológus) Kovács-Pálffy Péter Szepesi János McIntosh, Richard William (1978-) (geológus) Kónya Péter (1978-) (geográfus, geológia) Vincze László Gyula G.
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

3.

001-es BibID:BIBFORM113375
035-os BibID:(cikkazonosító)826 (WoS)001017187600001 (Scopus)85163963917
Első szerző:Shebl, Aly (geológus)
Cím:Impact of DEMs for Improvement Sentinel 2 Lithological Mapping Utilizing Support Vector Machine: A Case Study of Mineralized Fe-Ti-Rich Gabbroic Rocks from the South Eastern Desert of Egypt / Ali Shebl, Hatem M. El-Desoky, Ahmed M. Abdel-Rahman, Wael Fahmy, Hamada El-Awny, Anas El-Sherif, Mahmoud M. El-Rahmany, Árpád Csámer
Dátum:2023
ISSN:2075-163X
Megjegyzések:Fused remote sensing datasets have greatly contributed to enhancing lithological targets and providing significant information for mineral exploration. For instance, multispectral datasets can discriminate rock units through their unique spectral signatures. Digital Elevation Models (DEMs) could be an effective tool boosting lithological discrimination based mainly on their topographic variations. Consequently, the current study applied the power of the support vector machine (SVM) algorithm and the integrated Phased Array L-type band Synthetic Aperture Radar (PALSAR) DEM and multispectral Sentinel 2 data to: 1-Create an updated lithological map of a poorly mapped arid terrain (Khashir-Ras El-Kharit district, Eastern Desert of Egypt), and 2-Compare and assess the distribution of ferrogabbros with the aim of improving the localization of these rock bodies and investigating their mineral content. Our results enhanced the lithological mapping and revealed a better generalization of mineralized ferrogabbros when the input was a fused DEM with Sentinel 2 compared to the salt and pepper effect observed when adopting the Sentinel 2 solely as the input data. Additionally, the current research strongly recommends detailed exploration programs for Fe-Ti oxide ores within the gabbroic rocks delineated through the resultant thematic map. The ferrogabbros were subjected to a comprehensive analysis involving whole rock geochemistry, XRD, EDX, and lightreflecting investigations, which revealed the existence of magnetite, titanomagnetite, and hematite. The titanomagnetite crystals display subhedral morphology and exhibit fine- to medium-grained surfaces with irregular shapes. X-ray diffraction (XRD) analysis revealed the presence of magnetite and hematite in the concentrated Fe-Ti oxides. Additionally, the whole rock geochemistry highlighted the origin of the ferrogabbros and their proposed tectonic setting as an alkaline to calc-alkaline magma type that developed in a continental arc setting
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
lithological mapping
Sentinel 2
DEMs
Eastern Desert
gabbroic rocks
Fe-Ti oxides
Megjelenés:Minerals. - 13 : 6 (2023), p. 1-36. (cikkazonosító) 826-. -
További szerzők:El-Desoky, Hatem M. Abdel-Rahman, Ahmed M. Fahmy, Wael El-Awny, Hamada El-Sherif, Anas M. El-Rahmany, Mahmoud M. Csámer Árpád (1976-) (geológus)
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

4.

001-es BibID:BIBFORM096746
035-os BibID:(cikkazonosító)641
Első szerző:Shebl, Aly (geológus)
Cím:Multisource Data Analysis for Gold Potentiality Mapping of Atalla Area and Its Environs, Central Eastern Desert, Egypt / Ali Shebl, Mahmoud Abdellatif, Sayed O. Elkhateeb, Árpád Csámer
Dátum:2021
ISSN:2075-163X
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Minerals. - 11 : 6 (2021), p. 1-19. -
További szerzők:Abdellatif, Mahmoud Elkhateeb, Sayed O. Csámer Árpád (1976-) (geológus)
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

5.

001-es BibID:BIBFORM114427
035-os BibID:(cikkazonosító)1083 (WoS)001056422600001 (Scopus)85169106944
Első szerző:Varga Andrea (geológus)
Cím:Effects of Metasomatism on Granite-Related Mineral Systems: A Boron-Rich Open Greisen System in the Highiş Granitoids (Apuseni Mountains, Romania) / Andrea Varga, Attila Pozsár, Norbert Zajzon, Boglárka Topa, Zsolt Benkó, Elemér Pál-Molnár, Béla Raucsik
Dátum:2023
ISSN:2075-163X
Megjegyzések:Greisenization is typically linked with highly fractionated granites and is often associated with hydrothermal vein systems. Late to postmagmatic metasomatic processes involve the enrichment of volatile components such as boron and halogens as well as several metallic elements. The purpose of this study is to reveal the main metasomatic effects and paragenetic sequences of the related mineralizations in Highiş granitoids, Romania. In a natural outcrop, more than 30 samples were collected from granitoids, felsic veins, and country rocks. We carried out a detailed mineralogical and petrological characterization of carefully selected samples using X-ray powder diffractometry, electron microprobe analysis, and microscopic methods together with K-Ar ages of whole rocks and K-bearing minerals. Several characteristic features of albitization, sericitization, tourmalinization, epidotization, and hematitization were recognized in the studied samples. Crystallization of quartz, K-feldspar, and magnetite represents the first stage during the magmatic-hydrothermal transition. The mineral assemblage of albite, sericite, schorl, and quartz originates from the early and main stages of greisenization. While the subsequent mineral assemblages, which predominantly include dravite, specular hematite, and epidote, are closely related to the late vein-depositing stage. We propose that the study area could belong to a boron-rich open greisen system in the apical portion of Guadalupian A-type granite. Based on a new hypothesis, the previously published Permian crystallization ages (between ~272 Ma and ~259 Ma) could be homogenized and/or partially rejuvenated during the hydrothermal mineralization processes due to uraniferous vein minerals. Additionally, the Highiş granite-related system suffered a Cretaceous thermal overprint (between ~100 Ma and ~96 Ma). The results may help to understand the evolution of highly evolved granite intrusions worldwide and improve our knowledge of the effect of hydrothermal mineralization processes on the emplacement ages.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
greisen system
petrography
specular hematite
epidote
tourmaline chemistry
metasomatism
hydrothermal mineralization
thermal overprint
Megjelenés:Minerals. - 13 : 8 (2023), p. 1-8. -
További szerzők:Pozsár Attila Zajzon Norbert Topa Boglárka Benkó Zsolt (1980-) (geológus) Pál-Molnár Elemér Raucsik Béla
Pályázati támogatás:K108375
NKFIH
K131690
NKFIH
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Rekordok letöltése1 
Corvina könyvtári katalógus v8.2.27 © 2023 Monguz kft. Minden jog fenntartva.