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  • 2010-2014  (7,993)
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  • 1
    Publication Date: 2021-03-29
    Description: The paleosols of the Last Interglacial are presented in many loess sequences of the European temperate zone by soils with Argic horizon, that are considered to be the pedological response to the bioclimatic conditions of that period. We studied micromorphological, physical/chemical (bulk chemical composition, texture and dithionite-extractable iron) and mineralogical characteristics of two profiles – an Eemian Luvisol in Upper Austria (Oberlaab) and a Mikulino Albeluvisol in Central Russia (Alexandrov Quarry near Kursk) to compare them with recent analogous soils and to make further paleoecological and chronological inferences. Both profiles showed a set of characteristics indicative for weathering of primary minerals, clay transformation illuviation and surface redoximorphic (stagnic) processes. Paleosols demonstrate more advanced development than the Holocene analogues manifested however in different pedogenetic characteristics. The Eemian Luvisol in Upper Austria is characterized by stronger clay illuviation manifested in higher clay content and abundance of illuvial clay pedofeatures in the Bt horizon. Mikulino Albeluvisol in Central Russia is more strongly affected by eluvial and stagnic processes evidenced by deeper and more intensive accumulation of bleached silty material and clay depletion. We suppose that the properties of parent material are responsible for these differences. Russian Albeluvisol is formed on the Dnepr loess poor in weatherable minerals and having limited capacity for buffering acidity and clay formation. The higher development status of the Last Interglacial paleosols compared to the Holocene soils having however same type pedogenesis implies longer soil formation period, that agree with some of the paleobotanical proxies and could include besides MIS 5e part of MIS 5d; the warmer and moister paleoclimate during MIS 5e could also account for more advanced paleosol development Several phases of clay illuviation interrupted by frost structuring and deformation are detected in the Eemian Bt horizon in Upper Austria. It suppose even longer development that could extend to the Early Würmian interstadials (late substages of MIS5).
    Description: research
    Keywords: 551 ; paleosol ; paleoclimate ; last interglacial ; Argic horizon
    Language: English
    Type: article , Verlagsversion
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  • 2
    Publication Date: 2021-03-29
    Description: After a long decline of gold production in Ghana since 1986 the gold mining sector is recovering and mainly foreign investment led to substantial exploration efforts as well as to the opening up of new mines and/or rehabilitation and expansion of the existing mines after their divestiture (privatization). Foreign junior exploration and mining companies and established international mining houses are currently exploring the country in search of large, therefore commonly low-grade gold deposits which are amenable to highly mechanized open pit mining. Beside such orebodies of the disseminated type or in granites, Ghana is endowed with many occurrences of gold quartz veins and banket reefs, which vary in width from a few centimetres to several metres and have striking length from a few 10 meter to several kilometer. Whilst such larger orebodies with ore reserves of above 1 Mio. tons are a target for industrial mining operations, the smaller "stringer"-occurrences are not of interest, if not only as indicators in prospection for possible adjacent disseminated mineralization. Such restricted orebodies could offer investment and employment opportunities for Ghanaian owned mining groups and companies and should therefore contribute also to economic development of the hinterland. Some of these orebodies as well as the ubiquitous gold bearing alluvials are currently mined by artisanal small scale miners, commonly called "galamsey", which use manual labour only and employ simple handtools in their operations. A visit to such operations will convince any observer that in almost all cases the operations are either inefficient, including the skimming of orebodies, or dangerous, or environmentally unsound or a combination of these. This is due to the long oppression of small scale mining activities first by the Colonial Government from about 1920 ongoing, later by the Ghanaian authorities after Independence. Only in 1986 under the Minerals and Mining Law, PNDC-Law 153 was the small miner legally recognized and a basis laid for his operations. Vast experience in narrow vein mining, which was available among African small scale miners before and around the advent of this century has been lost. To prove this point, mention should be made of the African engineer T.B.F. Sam, who managed and operated singlehandedly the Adja Bippo Mine near Tarkwa before 1900, the only mine of all the mines in operation since 1880 which was profitable and declared dividends (Rosenblum, 1974). Today it can still be assumed that there will be no re-juvenation of skilfull vein mining by African small scale miners as long as it has not been proved to Ghanaian investors that such operations could be viable. The proof can be presented best by a few reference operations applying durable, locally available machinery, simple and sound mining and extraction methods, basic safety standards and bearable working conditions as well as in their effect on the environment controlled operations. Such reference mines could also provide the necessary information in respect of day-to-day running problems, required amounts of investment, minimum working capital, maintenance and repair needs and problems with unskilled labour drawn from the surroundings of such small mines, to mention only a few areas of missing experience.
    Description: My brother still wanted to publish this magazine article at the 15.05.2001 before his death. Unfortunately, it was not granted to him any more to do this. I have sighted his estate and processed according to these as his brother. Therefore I am publishing the last work of my brother Dipl engineer Winfried Peters now, too, so that his bequest is filled. I unfortunately can not guarantee for the scientific correctness of the work, however, have revised this work after best knowledge and conscience.
    Description: research
    Keywords: 622 ; ZU 000 ; Bergbau {Technik} ; Ghana ; Tetrem ; Small Scale Mining ; Gold
    Type: article , draft
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  • 3
    Publication Date: 2021-03-29
    Description: A detailed study of a loess-paleosol sequence in Oberlaab, Upper Austria, is presented with emphasis on macro- and micromorphological features, grain size distribution, rock magnetism properties, and weathering degree that allows correlation with other loess-paleosol sequences in neighboring areas, and interpretation of main pedogenic trends. The studied sequence comprises four paleosol complexes, which likely developed during four interglacial stages MIS 11, 9, 7 and 5e, and a modern soil. The oldest paleosol complex (OL5) represents three phases of soil formation, and distinct sedimentary events never reported in the area, with strong reductomorphic properties. The OL4 profile also results from three phases of pedogenesis with increased reductomorphic features in the deepest zone (affected by cryoturbation events). OL3 has abundant features related to gleyic/stagnic processes, but shows signs of clay illuviation. OL2 (Eemian soil) correlates with the MIS 5e. This paleosol shows higher degrees of clay illuviation and weathering, and fewer features related to reductomorphic processes. The modern soil is also polygenetic and constitutes a pedocomplex. Its lowermost part is formed by Würmian glacial deposits, where no well-developed soils are found; only reworked materials and pedosediments. Main pedogenic trends in the sequence are clearly differentiated. All of the paleosols were formed in humid environments, but differing in drainage conditions. The base, with OL5 and OL4 paleosols, was more affected by gleyic processes, while in the upper paleosols, especially OL2, clay illuviation is dominant. We interpret such differences to be caused by the topographic position. The basal paleosols were more affected by fluvioglacial processes due to their position on top of the terrace. The upper paleosols received increased amounts of sediment through fluvial, colluvial and aeolian (loess) input.
    Description: research
    Keywords: 551 ; loess ; paleosol ; pedogenesis ; middle pleistocene ; Oberlaab
    Language: English
    Type: article , Verlagsversion
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  • 4
    Publication Date: 2021-03-29
    Description: The more than 12 m thick loess-paleosol sequence in Paudorf, Lower Austria, has been known for decades as locus typicus of the “Paudorfer Bodenbildung” (Paudorf paleosol). The upper section of the outcrop contains an up to 1 m thick pedocomplex that developed during MIS 5. The differentiated sequence of loess-like sediment below, including a more than 2 m thick pedocomplex in its basal part, is an exceptional archive of landscape evolution from the Middle Pleistocene. Herein we present detailed paleopedological and sedimentological surveys, as well as first micromorphological observations to address the sequence in its entirety and the processes leading to its genesis. Furthermore, high resolution color and carbonate analyses, as well as detailed texture analyses, have resulted in a substantial database. The studies show that the loess sediments were subject to a polygenetic development under periglacial conditions reflected in eolian silt and fine sand accumulation, admixture of local material during (mostly solifluidal) redeposition and in situ processes. Horizons with signs of pedogenesis, particularly the two pedocomplexes, document longer phases of stability; the stages of development can be correlated to equivalent sequences and seen as paleoclimatic signals where chronological data are available. The upper pedocomplex is a Chernozem of the early last glacial (MIS 5c–[a?]), which developed in a solifluidal redeposited (MIS 5d) interglacial Cambisol (MIS 5e). Cryosols, typical for MIS 6 sequences, are present in the loess sediment below. The lower pedocomplex formed during several warm stages of varying intensities, with interruptions caused by colluvial processes and admixture of eolian sediment during colder stages.
    Description: research
    Keywords: 551 ; micromorphology ; loess ; lower austria ; paudorf ; middle pleistocene ; paleopedology ; landscape formation
    Language: English
    Type: article , Verlagsversion
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  • 5
    Publication Date: 2021-03-25
    Description: Die vorliegende quantitative Befragung unter den Bewohnern des Biosphärenreservates Südost-Rügen untersucht, wie die Menschen ihre Region, Natur und Landschaft und das Biosphärenreservat wahrnehmen und einschätzen. Die Ergebnisse liefern der Biosphärenreservatsverwaltung als ein Instrument für sozioökonomisches Monitoring damit empirische Daten, um das Management an die lokalen Bedürfnisse anzupassen.
    Description: Deutsche Bundesstiftung Umwelt (DBU)
    Description: research
    Keywords: 910 ; QFC 470 ; QEB 000 ; QGB 224 ; Biosphärenreservat Südost-Rügen ; Regionale Identität ; Sozioökonomisches System ; Umfrage ; Mecklenburgisch-Vorpommerscher Abschnitt {Geographie} ; Landschaftsbewertung {Angewandte Geographie} ; Umweltwahrnehmung und Raumbewertung {Geographie}
    Language: German
    Type: monograph , publishedVersion
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  • 6
    Publication Date: 2021-03-29
    Description: Since 1980 the Institute of Mining and Geosciences of the Technical University of Berlin carried out an educational project at the University of Science and Technology (UST) in Kumasi and the UST School of Mines in Tarkwa, Ghana, Westafrica. Eichmeyer (1) reported about this project already, in which this author did participate. This project of scientific cooperation in the areas of mining and minerals sciences is not the first contact between Germany and Ghana (earlier called Gold Coast or Guinea). At the end of the 17th Century the Brandenburg-Prussians had undertaken mining activities on the Gold Coast already apart from gold-trade. The historical background of these early mining activities will be presented in the light of the then prevailing political and economical conditions. In this context the early mining attempts of other European powers as well as the indigenous mining activities in those days are described. The development of the modern industrial gold mining sector in Ghana was presented by Gosten and Peters (2) elsewhere.
    Description: My brother still wanted to publish this magazine article at the 15.05.2001 before his death. Unfortunately, it was not granted to him any more to do this. I have sighted his estate and processed according to these as his brother. Therefore I am publishing the last work of my brother Dipl engineer Winfried Peters now, too, so that his bequest is filled. I unfortunately can not guarantee for the scientific correctness of the work, however, have revised this work after best knowledge and conscience.
    Description: research
    Keywords: 622 ; ZU 000 ; Bergbau {Technik} ; Ghana ; Gold ; Mining ; Brandenburg-Prussians ; Trade
    Type: article , draft
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  • 7
    Publication Date: 2021-03-29
    Description: This book attempts to outline the history of gold mining and related subjects like marketing, trading and use of gold from the legendary times until today. The work will not limit itself to the borders of present day Ghana but will have to consider also adjacent areas of today's Mali, Burkina Faso, Niger and Nigeria to put especially the earlier historical developments into their proper context. This History will attempt to piece together not only the technical development of gold mining, but the historical, political and socio-economical pressures which caused and were also generated by the development of the gold mining sector within this geographical area. A disadvantage for the historian digging into West African History is the fact that the peoples dwelling in these areas had not developed written records but rather depended on oral tradition of their history. Systematic attempts to preserve this oral history through taping or writing down were undertaken only over the last 100 to 150 years, in sporadic attempts may be a little earlier. The historical events of the last millenium, i.e. from 1000 A.D. to today can be reconstructed for the first half through the written records overcome by the efforts of the muslim scholars, which in a very scientific manner recorded historical, political, economical and social developments in West Africa and in the sub-Sahelian areas. Over the last 500 years the advent of European traders, missionaries and adventurers produced written records of events they encountered during their more or less long ventures at the shores of the West Coast. Of course, a lot of information they gathered and laid down in their records was based on hear-say sources because only very few adventurers penetrated the hinterlands. Nevertheless, we will realise that all these records, as one-sided and biased they might be in many cases, together with oral tradition culled from the traditional rulers and archeological evidence, can form a quite solid basis for the reconstruction of historic events in West Africa in general and the area of today's Ghana in particular. Completely different is the picture for the earlier times, i.e. before 1000 A.D. for the three millenia back to 2000 B.C. We are very certain that negroid ethnics were populating the West African lands but we do not know where they came from, how they called themselves, which political and socio-economic systems they had developed for themselves and whether or when they perished, migrated away or were absorbed by other negroid ethnic groups who themselves migrated from almost uncertain directions into these tropical rainforests. In short, whilst we can speak of the Bono, Gyaman, Guan, Asante for the last millenium, we can only call the previous inhabitants the black "West-African", sometimes differentiated according to distinct cultures named according to the location of their archeological finds, like Ntereso, Nok, Benin etc. These sites prove the existence of highly developed cultural and technical skills expressed in the overcome artefacts found in the excavations. But the curtain in respect of the true nature, descendancy, sociology of these people, who were the originators and perpetuators of these documented cultures, can not be lifted. Here reflection on the flow of historical events from the ancient times to modern times. Guggisberg's citation We will leave it to you, the esteemed reader to form an opinion on the question: Did the development of the gold mining sector benefit the People of Ghana ?
    Description: I have sighted his estate and processed according to these as his brother. Therefore I am publishing the last works of my brother Dipl. engineer Winfried Peters now, so that his bequest is filled. I have revised this work after best knowledge and conscience. I would be pleased if this work would find a wide audience and would activate to new and further researches.
    Description: research
    Keywords: 622 ; ZU 000 ; Bergbau {Technik} ; Goldbergbau ; Ghana ; Gold Mining ; History ; Geschichte
    Language: English
    Type: monograph , acceptedVersion
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  • 8
    Publication Date: 2021-03-29
    Description: This publication is the continuation of a previous presentation of the operation and cost analysis of the partly mechanised Tetrem small scale gold mine which discussed in detail the mining, safety and environmental aspects of the venture. At Tetrem, various experiments with different machinery for crushing and grinding the ore in preparation for gravity separation (sluicing) were carried out and the results are presented. The trials led to the construction and application of suitable, locally obtainable equipment for such milling operations. Continuous weighing and sample checks at the different stages of the comminution and gravity separation provided interesting production and recovery data which could be of help for similar operations. Trials for improved recovery of gold from sulphidic ores were carried out and showed the restrictions of gravity separation when confronted with such „fresh ores“. The amalgamation process, recirculation of tailings, special handling of tailings for recovery improvements are described. An overview about the results obtained during six months of operation is presented. Improvements for the locally produced machines and problems with maintenance and repairs of the equipment as well as strategies to solve them are discussed. The experiences obtained in the marketing of the final gold product are critically outlined.
    Description: My brother still wanted to publish this magazine article at the 15.05.2001 before his death. Unfortunately, it was not granted to him any more to do this. I have sighted his estate and processed according to these as his brother. Therefore I am publishing the last work of my brother Dipl engineer Winfried Peters now, too, so that his bequest is filled. I unfortunately can not guarantee for the scientific correctness of the work, however, have revised this work after best knowledge and conscience.
    Description: research
    Keywords: 622 ; ZU 000 ; Bergbau {Technik} ; Ghana ; Small Scale Mining ; Gold Ore Treatment
    Type: article , draft
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  • 9
    Publication Date: 2021-03-29
    Description: Die vorliegende Arbeit stellt die paläomagnetische Bearbeitung der Mittel- bis Oberpleistozänen Löss-/Paläoboden-Sequenz im Areal der ehemaligen Ziegelei Würzburger in Aschet bei Wels vor. Fünf intensiv entwickelte Paläoböden, bzw. Pedokomplexe wechseln mit dazwischen geschalteten Lößlehmlagen ab. Im Rahmen einer Aufbaggerung konnte ein Profil mit einer Mächtigkeit von über 12 m erschlossen werden. Für die magnetostratigraphischen Laboruntersuchungen im Paläomagnetiklabor der Montanuniversität Leoben wurden insgesamt 587 orientierte Proben entnommen, so dass eine beinahe lückenlose Beprobung vorliegt. Die Proben wurden mit magnetischen Wechselfeldern sowie thermisch abmagnetisiert. Zur Bestimmung der magnetischen Trägerminerale in den Sedimenten wurden Curiepunkt-Bestimmungen durchgeführt, die eine Hauptträgerphase mit einem Curie-Punkt bei ca. 580°C (Magnetit), sowie untergeordnete Anteile von Hämatit mit 670°C Curie-Punkt ergaben. Die magnetischen Parameter zeigen eine Folge von Bereichen mit intensiver Magnetitbildung in den Paläoböden, die dem relativ wärmeren Klima von Interglazialen zugeordnet werden können. Die Mehrzahl der Proben zeigen charakteristische Remanenzrichtungen im Bereich des normalen pleistozänen Erdmagnetfeldes. In einigen Profilabschnitten traten stark abweichende Remanenzrichtungen auf, die auf Exkursionen des Erdmagnetfeldes hinweisen. Die beobachteten Exkursionen im Profil Wels-Aschet werden aufgrund paläopedologischer-pedostratigraphischer Ergebnisse in das Zeitintervall von 570 ka (Emperor - Big Lost - Calabrian Ridge) bis 110 ka (Blake) gestellt. Die Brunhes/Matuyama-Grenze (776 ka) wurde nicht erreicht.
    Description: research
    Keywords: 551 ; pleistocene ; loess ; pléistocène ; chronostratigraphy ; palaeosol ; upper austria ; magnetic excursion ; rock magnetic properties
    Language: English
    Type: article , Verlagsversion
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  • 10
    Publication Date: 2021-03-29
    Description: Auf den mittelpleistozänen fluvioglazialen Terrassen der Traun-Enns-Platte in der Region um Wels (Oberösterreich) wurden drei Löss-/Paläobodensequenzen untersucht. Jedes dieser Profile ist für mittelpleistozäne Abfolgen im nordöstlichen Alpenvorland charakteristisch. Die Profile umfassen mächtige Pedokomplexe, welche eine Differenzierung und Einstufung von interglazialen Paläoböden erlauben. Die Löss-/Paläobodensequenz von Oberlaab ist auf der fluvioglazialen Terrasse des Mindel-Glazials im klassischen Sinne entwickelt (Jüngere Deckenschotter) und weist vier interglaziale Paläoböden auf. Diese Tatsache macht eine Einstufung der Jüngeren Deckenschotter mindestens in die fünftletzte Kaltzeit wahrscheinlich (MIS 12). Die Deckschichten auf den Günz-Deckenschottern im klassischen Sinn (Ältere Deckenschotter) beinhalten fünf Paläoböden. Beide Lokalitäten weisen eine sehr intensive Pedogenese in ihrem basalen Pedokomplex auf, die wesentlich ausgeprägter ist, als in den überlagernden Paläoböden. Die pedostratigraphischen Ergebnisse lassen eine Einstufung der Älteren Deckenschotter mindestens ins MIS 16 zu.
    Description: research
    Keywords: 551 ; loess ; quaternary stratigraphy ; Wels-Aschet ; Oberlaab ; landscape formation ; palaeosol
    Language: English
    Type: article , Verlagsversion
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