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Microbial control on the mineralogy of Arief El Naqa phosphates, Egypt 微生物对埃及Arief El Naqa磷酸盐矿物学的控制
Acta Geologica Hungarica Pub Date : 2005-12-02 DOI: 10.1556/AGEOL.48.2005.3.6
I. Rahman, M. †. Mansour
{"title":"Microbial control on the mineralogy of Arief El Naqa phosphates, Egypt","authors":"I. Rahman, M. †. Mansour","doi":"10.1556/AGEOL.48.2005.3.6","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.3.6","url":null,"abstract":"SEM examination of the pelletal phosphates from the Upper Cretaceous of Arief El Naqa in eastern Sinai reveals the presence of bacterial relics and globular clusters of phosphate, iron oxyhydroxides and halite. All have been identified only within cavities and in the phosphatic cement around phosphate particles. These microbial structures were, therefore, produced by the aid of microorganisms in association with infiltrating meteoric water from the nearby vegetation cover. They were able to accelerate the dissolution of pyrite and the leaching of phosphate particles to use phosphorus as a desired nutrient. Phosphate globular clusters and goethite framboids were formed as the result of crystal growth of the biologically precipitated precursor phases. Bacteria were simply available nucleation sites for binding of these nanoparticles. Halite clusters were also identified in a similar setting and show a co-genetic relationship with other types of microstructures. Therefore, the role of microorganisms in the f...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121549785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Position of the Marmarosh Flysch (Eastern Carpathians) and its relation to the Magura Nappe (Western Carpathians) Marmarosh Flysch(东喀尔巴阡山脉)的位置及其与Magura推覆带(西喀尔巴阡山脉)的关系
Acta Geologica Hungarica Pub Date : 2005-12-02 DOI: 10.1556/AGEOL.48.2005.3.2
N. Oszczypko, M. Oszczypko-Clowes, J. Golonka, M. Krobicki
{"title":"Position of the Marmarosh Flysch (Eastern Carpathians) and its relation to the Magura Nappe (Western Carpathians)","authors":"N. Oszczypko, M. Oszczypko-Clowes, J. Golonka, M. Krobicki","doi":"10.1556/AGEOL.48.2005.3.2","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.3.2","url":null,"abstract":"The Magura Nappe is the innermost tectonic unit of the Western Flysch Carpathians and is linked with the Rheno-Danubian flysch of the Eastern Alps. Toward the east this unit runs as an arc from Austria through the Czech Republic, Slovakia and Poland, and then narrows in Eastern Slovakia before disappearing east of Uzhhorod (Trans-Carpathian Ukraine). The Magura Nappe is dominated by Paleogene deposits. In the Ukrainian Carpathians, SE of the Latorica River, the position of the Magura Nappe is occupied by the Marmarosh Flysch Zone. Two facies-tectonic units have been distinguished in this zone - the external Vezhany and the internal Monastyrets' units. Both the Magura Nappe and Marmarosh Flysch revealed the same geotectonic position, lithofacies development and a similar diachronic distribution of Eocene/Oligocene facies in the basins. The Vezhany succession could be regarded as the equivalent of the Fore-Magura thrust sheet in Poland, whereas the Monastyrets resembles the Raca development of the Magura Na...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"349 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132761714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Early phase ductile deformation elements in the limestone of the eastern part of the Bükk Mts, Hungary 匈牙利b<s:1> kk山脉东部石灰岩的早期韧性变形元素
Acta Geologica Hungarica Pub Date : 2005-12-02 DOI: 10.1556/AGEOL.48.2005.3.3
N. Németh, F. Mádai
{"title":"Early phase ductile deformation elements in the limestone of the eastern part of the Bükk Mts, Hungary","authors":"N. Németh, F. Mádai","doi":"10.1556/AGEOL.48.2005.3.3","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.3.3","url":null,"abstract":"In the Paleozoic and Mesozoic rocks of the Bukk Mountains the imprints of a polyphase deformation and an anchi-epizonal metamorphism were observed. The physical conditions of this metamorphism were the same as that of the earliest, ductile deformation phase. The imprints of later deformation phases can generally be distinguished by their tectonic style. Our investigation was focused on the style of folding and on the different textural elements of limestone which developed during the early deformation phase. According to lithologic conditions and geographical position, the folds show a certain style variety. The multilayer fold geometry depends on the thickness ratio and the competence contrast between the layers. In the occurrence of different textural patterns the position within a fold and the pre-deformational grain size play an important role. The main deformation mechanism in the fine-grained matrix was pressure solution, while coarse-grained crystal aggregates show signs of dynamic recrystallizatio...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116708747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
How much time is needed for laccolith formation? A new approach based on a case study from Csódi-hegy, Dunabogdány, Hungary 油石形成需要多长时间?一种基于匈牙利Csódi-hegy Dunabogdány案例研究的新方法
Acta Geologica Hungarica Pub Date : 2005-12-02 DOI: 10.1556/AGEOL.48.2005.3.4
Zsolt Bendő, L. Korpás
{"title":"How much time is needed for laccolith formation? A new approach based on a case study from Csódi-hegy, Dunabogdány, Hungary","authors":"Zsolt Bendő, L. Korpás","doi":"10.1556/AGEOL.48.2005.3.4","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.3.4","url":null,"abstract":"The Csodi-hegy laccolith belongs to the Middle Miocene Borzsony and Visegrad Andesite Formation, and is built up by fluidal amphibole biotite dacite. This is a small, typical laccolith as shown by its size (Dl = 11000-1200 m, D2 = 900-1000 m, A ~ 150 m), shape, areal extent of 1 km2 and aspect ratio of 0.08 to 0.14. The fluidal structure of the laccolith is the result of alternation of dark and light bands. The thickness of the bands is in cm-dm scale. This structure and the feeding channels are very well exposed here thanks to quarrying activity. The time span-calculation was performed by counting of the individual bands, by volume estimations and by detailed magnetostratigraphic study. For the calculation of magma transport and growing-time the following assumptions were made: 6-8 km depth of the magma chamber, pressure of 8-10 kbars, temperature of 850-900 °C, a rate of ascent 1 mm/20-36 hours, 15 cm as the average width of a single band, a relative depth for emplacement about 450 m and the volume of t...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126032760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Sedimentary cycles and rhythms in a Sarmatian to Pannonian (Late Miocene) transitional section at Oarba de Mures/Marosorbó, Transylvanian Basin 特兰西瓦尼亚盆地Oarba de Mures/Marosorbó地区萨尔马西亚-潘诺尼亚(晚中新世)过渡段沉积旋回与韵律
Acta Geologica Hungarica Pub Date : 2005-12-02 DOI: 10.1556/AGEOL.48.2005.3.1
O. Sztanó, C. Krézsek, I. Magyar, F. Wanek, G. Juhász
{"title":"Sedimentary cycles and rhythms in a Sarmatian to Pannonian (Late Miocene) transitional section at Oarba de Mures/Marosorbó, Transylvanian Basin","authors":"O. Sztanó, C. Krézsek, I. Magyar, F. Wanek, G. Juhász","doi":"10.1556/AGEOL.48.2005.3.1","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.3.1","url":null,"abstract":"A continuous Sarmatian/Pannonian boundary section, which rarely crops out within the Pannonian Basin, was studied near Oarba de Mures/Marosorbo. Alternating beds of clay marl, calcareous marl, siltstone, sandstone and andesitic tuff are present up to a thickness of about 100 m. Traditionally the Sa/Pa boundary was placed at the top of the last significant tuff layer, which has been confirmed by mollusk-bearing strata a few meters above belonging to the \"Lymnocardium\" praeponticum Zone. This zone is coeval with the Early Pannonian Mecsekia ultima dinoflagellate zone and the C5r magnetic polarity zone. Three ranks of cyclicity connected to sediment gravity flows are present in the outcrops. Coarse silt to sandstone beds were formed by low-density turbidity currents. These individual events represent \"dilution cycles\" connected to the intensity and abundance of turbidity currents. Turbiditic beds, some 2-5 m-thick series of sandstones, form coarsening/thickening upward cycles of 8-20 m of thickness. This cyc...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130329126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Metamorphic petrology and geochemistry of the Sarkadkeresztúr Basement-High with special regard to orthogneiss (Tisza Mega-unit, SE Hungary) Sarkadkeresztúr基底-高地的变质岩石学和地球化学，特别是正长性(匈牙利东南部Tisza巨型单元)
Acta Geologica Hungarica Pub Date : 2005-12-01 DOI: 10.1556/AGEOL.48.2005.4.3
E. Pál-Molnár, G. Lelkes-Felvári, A. Batki, R. Sassi
{"title":"Metamorphic petrology and geochemistry of the Sarkadkeresztúr Basement-High with special regard to orthogneiss (Tisza Mega-unit, SE Hungary)","authors":"E. Pál-Molnár, G. Lelkes-Felvári, A. Batki, R. Sassi","doi":"10.1556/AGEOL.48.2005.4.3","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.4.3","url":null,"abstract":"Core samples of metamorphic rocks from the Sarkadkeresztur Basement High (Bekes-Codru Unit, Tisza Mega-unit) were examined, consisting mainly of two-feldspar augengneiss, garnet-andalusite-staurolite-bearing micaschist and paragneiss. The protolith of the plagioclase-microcline-augengneiss was found to be S-type granite (syenogranite) of unknown age. According to the major element analyses the protoliths of the studied metagranitoids of this basement can be classified as a syenogranite of metaluminous and peraluminous character displaying subalkaline affinity and a calcic granitic composition. The REE patterns are characterized by a slight enrichment of the light REEs and negative Eu and Yb anomalies. On the basis of discrimination diagrams for major and trace elements, the studied rocks were formed in a syn-collisional (continent-continent collision zone) tectonic environment. The low-pressure amphibolite facies metamorphism, which affected this basement, can be assigned to the Variscan.","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125994322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Formation and deformation of the Derecske Trough, Pannonian Basin: Insights from analog modeling 潘诺尼期盆地Derecske海槽的形成与变形:模拟模拟的启示
Acta Geologica Hungarica Pub Date : 2005-12-01 DOI: 10.1556/AGEOL.48.2005.4.1
G. Windhoffer, G. Bada
{"title":"Formation and deformation of the Derecske Trough, Pannonian Basin: Insights from analog modeling","authors":"G. Windhoffer, G. Bada","doi":"10.1556/AGEOL.48.2005.4.1","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.4.1","url":null,"abstract":"We present the results of a fault reactivation study that used the analog modeling technique. The modeled tectonic processes represent the formation and subsequent deformation of the Derecske Trough and have implications for the evolution of the entire Pannonian basin system. Structural inversion of former thrusts led to normal faulting during the Miocene and corresponds to the formation, whereas subsequent reactivation of these faults in a strike-slip manner during the late Miocene to Quaternary represents neotectonic deformation of the basin. Modeling results show that reactivation of thrust faults in a transtensional manner can occur in a broad range of dip angles, and of angular differences between the maximum principal stress axis and the strike of the fault. The reactivation pattern of strike-slip zones in sandbox models critically depends on the orientation of the fault system with respect to the confining stress field, on the material property of the sand, and on the presence of a lubricant layer, representing a potential detachment horizon at the base of the models. The shear zones at the border zones of the Derecske pull-apart basin are prone to further reactivation, regarding the present-day stress field in the area. These inferences are confirmed by the recent seismic activity of the area, and point to the key importance of fault reactivation studies during seismic hazard assessment.","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133858706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Metamorphic history of the Algyő High (Tisza Mega-unit, basement of Great Hungarian Plain) A counterpart of crystalline units of the Koralpe-Wölz nappe system (Austroalpine, Eastern Alps). algy匈牙利高地(大匈牙利平原基底的Tisza巨型单元)的变质史与Koralpe-Wölz推覆体系统(奥地利阿尔卑斯山脉，东阿尔卑斯山)的结晶单元相对应。
Acta Geologica Hungarica Pub Date : 2005-12-01 DOI: 10.1556/AGEOL.48.2005.4.2
G. Lelkes-Felvári, R. Schuster, W. Frank, R. Sassi
{"title":"Metamorphic history of the Algyő High (Tisza Mega-unit, basement of Great Hungarian Plain) A counterpart of crystalline units of the Koralpe-Wölz nappe system (Austroalpine, Eastern Alps).","authors":"G. Lelkes-Felvári, R. Schuster, W. Frank, R. Sassi","doi":"10.1556/AGEOL.48.2005.4.2","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.4.2","url":null,"abstract":"The Dorozsma Complex (DC) is defined and its main lithologies are described. The complex makes up the bulk of the Algyo basement high, representing an outlier of a Cretaceous nappe system in the southernmost part of the Tisza Mega-unit (Great Hungarian Plain). The DC exhibits a polymetamorphic history characterized by a Permian, low-pressure amphibolite facies metamorphism, overprinted by a pressure-dominated eo-Alpine, amphibolite facies metamorphism, accompanied by penetrative mylonitization. \"Carboniferous breccias\" described by earlier authors and covering the metamorphic rocks sporadically are redefined as tectonized, mostly cataclastic rocks. The uppermost unit of the basement below the Neogene sediments is a nappe composed of Triassic clastic and carbonate sediments. Petrographic similarities of the DC with several units of the Koralpe-Wolz nappe system in the Eastern Alps indicate that both units were formed within a continuous belt in the Cretaceous.","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128159564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Early Paleozoic formations within pre-Alpine fragments incorporated into the Internal Dinarides 早古生代的前阿尔卑斯碎块中的构造并入了内迪纳里德
Acta Geologica Hungarica Pub Date : 2005-09-29 DOI: 10.1556/AGEOL.48.2005.2.5
I. Jurković
{"title":"Early Paleozoic formations within pre-Alpine fragments incorporated into the Internal Dinarides","authors":"I. Jurković","doi":"10.1556/AGEOL.48.2005.2.5","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.2.5","url":null,"abstract":"The Internal Dinarides include ten larger allochthonous pre-Alpine complexes, similar in many respects to those in the Eastern Alps, Carpathians and Rhodopes. The Dinaride Paleozoic complexes consist mainly of Devonian to Permian formations and are commonly associated with abundant Triassic sediments. In addition, the largest Paleozoic complexes contain subordinate Cambrian-Ordovician formations. The best developed Early Paleozoic complex, which occurs in western Macedonia, is composed of fossiliferous Cambrian metasediments with ophiolites and fossiliferous Ordovician metasediments, interlayered with subordinate metavolcanics and intruded by coeval Ordovician granitoids (461-465 Ma) that were overprinted during the Variscan and Alpine tectonogeneses. It is underthrust by Variscan formations and overthrust by Neoproterozoic Pelagonide formations. Parts of the Paleozoic Drina-Ivanjica complex are composed of fossiliferous Cambrian-Ordovician metasediments containing metamafics and metatuff that were overpr...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126900127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
MORB-type vs. BARB-type ophiolites of the Dinarides: geologic and geochemical data Dinarides的morb型与barb型蛇绿岩:地质与地球化学资料
Acta Geologica Hungarica Pub Date : 2005-09-29 DOI: 10.1556/AGEOL.48.2005.2.7
Damir Slovenec, J. Pamić
{"title":"MORB-type vs. BARB-type ophiolites of the Dinarides: geologic and geochemical data","authors":"Damir Slovenec, J. Pamić","doi":"10.1556/AGEOL.48.2005.2.7","DOIUrl":"https://doi.org/10.1556/AGEOL.48.2005.2.7","url":null,"abstract":"The Dinaridic Alpine ophiolites can be divided into two groups: 1) those of the Jurassic Dinaride Ophiolite Zone (DOZ) and 2) those of the Cretaceous-Early Paleogene (?) Sava-Vardar Zone (SVZ). However, geologically and petrologically they have so far been treated as a whole, and their geotectonic setting has not been reliably established. We have investigated ophiolite terranes from both regions in order to determine their tectonic setting. Our comparison is based on trace element data and characteristic elemental ratios correlated with ophiolite settings in recent oceans. We show that the DOZ tectonite peridotites are enriched in LREE and have high Ti/V ratios (up to 23), whereas the SVZ mantle rocks are LREE-depleted and have low Ti/V ratios (1-4). The DOZ cumulate gabbros and peridotites are characterized by increased Ni content and high Ba/Sr ratio, positive Eu anomalies and lower Cr# of spinels, comparable with MORB cumulates. The SVZ cumulates do not show a positive Eu anomaly and are characterized...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132044085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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