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  • 2020-2024  (58)
  • 1980-1984  (659)
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  • 1
    Call number: 10.1144/SP516 (e-book)
    In: Special publications / the Geological Society, London, No. 516
    Description / Table of Contents: Gold occurs in many settings, but the dynamic nature of Earth's crust means overlapping and overprinting deposit styles are common. Characterization of mineralization from an early stage becomes important, particularly where the mineralization is complex, in order to maximize exploration and project development success and mining productivity. Various techniques are used at different stages of a project to characterize gold deposits. This Special Publication offers a cross-section of some specific techniques used to investigate a variety of gold deposit types. The papers highlight both the breadth of the available techniques and their utility in deposit characterization, but also the many significant remaining questions and problems related to the exploration and research of gold deposits. Several papers include suggestions of avenues for fruitful further research, including a paper discussing a new approach to classifying orogenic gold deposits, and a paper describing archaeological applications of natural gold analyses.
    Type of Medium: 12
    Pages: vi, 432 Seiten , Illustrationen, Diagramme, Karten
    ISBN: 9781786205490 , 978-1-78620-549-0
    ISSN: 0305-8719
    Series Statement: Special publications / the Geological Society, London No. 516
    Language: English
    Note: Contents Torvela, T., Chapman, R. and Lambert-Smith, J. / An introduction to Recent Advances in Understanding Gold Deposits: from Orogeny to Alluvium: the importance of multi-method approaches and developing a characterization Large-scale processes, models and multi-variate datasets Mortensen, J. K., Craw, D. and MacKenzie, D. J. / Concepts and revised models for Phanerozoic orogenic gold deposits Babedi, L., von der Heyden, B. P., Tadie, M. and Mayne, M. / Trace elements in pyrite from five different gold ore deposit classes: a review and meta-analysis Liu, Y., Zhao, Y., Xue, C., Yu, L., Chu, H. and Zhao, X. / The Changshagou gold deposit, Eastern Tianshan, NW China: orogenic gold mineralization overprinting a porphyry gold occurrence Mesquita, M. J., Gomes, M. E. B., Moreira, I. de C., Paes, R. A. S., Martins, H. E. da S., Matos, J. H., Ruggiero, A., Primo, G., Ducart, D. F., Poggi, L., Pimenta, V., de Laurentis, L. Z. and Kunifoshita, A. M. U. / Paleoproterozoic gold deposits at Alta Floresta Mineral Province, Brazil: two overprinted mineralizing events? Zhao, W., Zhao, X., Xue, C., Seltmann, R., Dolgopolova, A., Andersen, J. C., Cui, X. and Xing, L. / Thermochronological constraints on the exhumation history of the Carboniferous Katebasu gold deposit, western Tianshan gold belt, NW China Orogenic gold deposit case studies Combes, V., Eglinger, A., André-Mayer, A.-S., Teitler, Y., Heuret, A., Gibert, P. and Béziat, D. / Polyphase gold mineralization at the Yaou deposit, French Guiana Perret, J., André-Mayer, A.-S., Eglinger, A., Feneyrol, J., Voinot, A., Morlot, C., Barou, F., Teitler, Y., Seira, D. and Bosc, R. / Structural and geochemical ore-forming processes in deformed gold deposits: towards a multiscale and multimethod approach Smith, M., Banks, D., Ray, S. and Bowers, F. / Hypozonal gold mineralization in shear zone-hosted deposits driven by fault valve action and fluid mixing: the Nalunaq deposit, Greenland Alexandre, P. and Fayek, M. / Formation temperature and ages of the True North ‘orogenic’ gold deposit in Manitoba, Canada Gold in the surficial environment Chapman, R. J., Craw, D., Moles, N. R., Banks, D. A. and Grimshaw, M. R. / Evaluation of the contributions of gold derived from hypogene, supergene and surficial processes in the formation of placer gold deposits Chapman, R. J., Moles, N. R., Bluemel, B. and Walshaw, R. D. / Detrital gold as an indicator mineral Masson, F.-X., Beaudoin, G. and Laurendeau, D. / Multi-method 2D and 3D reconstruction of gold grain morphology in alluvial deposits: a review and application to the Rivière du Moulin (Québec, Canada) Combes, V., Teitler, Y., Eglinger, A., André-Mayer, A.-S., Heuret, A., Pochon, A., Cathelineau, M. and Gibert, P. / Diversity of supergene gold expressions and implications for gold targetting in an equatorial regolith (AMG’s Couriège Exploration Prospect, French Guiana) Leal, S., Lima, A. and Noronha, F. / Characterization of heavy mineral concentrates and detrital gold particles from the Bigorne granite-hosted gold deposit in the Iberian Variscan Belt Standish, C. D., Chapman, R. J., Moles, N. R., Walshaw, R. D. and Sheridan, J. A. / Archaeological applications of natural gold analyses Index
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  • 2
    Call number: 9/M 07.0421(516)
    In: Special publications / the Geological Society, London, No. 516
    Description / Table of Contents: Gold occurs in many settings, but the dynamic nature of Earth's crust means overlapping and overprinting deposit styles are common. Characterization of mineralization from an early stage becomes important, particularly where the mineralization is complex, in order to maximize exploration and project development success and mining productivity. Various techniques are used at different stages of a project to characterize gold deposits. This Special Publication offers a cross-section of some specific techniques used to investigate a variety of gold deposit types. The papers highlight both the breadth of the available techniques and their utility in deposit characterization, but also the many significant remaining questions and problems related to the exploration and research of gold deposits. Several papers include suggestions of avenues for fruitful further research, including a paper discussing a new approach to classifying orogenic gold deposits, and a paper describing archaeological applications of natural gold analyses.
    Type of Medium: Monograph available for loan
    Pages: vi, 432 Seiten , Illustrationen, Diagramme, Karten
    ISBN: 9781786205490 , 978-1-78620-549-0
    ISSN: 0305-8719
    Series Statement: Special publications / the Geological Society, London No. 516
    Language: English
    Note: Contents Torvela, T., Chapman, R. and Lambert-Smith, J. / An introduction to Recent Advances in Understanding Gold Deposits: from Orogeny to Alluvium: the importance of multi-method approaches and developing a characterization Large-scale processes, models and multi-variate datasets Mortensen, J. K., Craw, D. and MacKenzie, D. J. / Concepts and revised models for Phanerozoic orogenic gold deposits Babedi, L., von der Heyden, B. P., Tadie, M. and Mayne, M. / Trace elements in pyrite from five different gold ore deposit classes: a review and meta-analysis Liu, Y., Zhao, Y., Xue, C., Yu, L., Chu, H. and Zhao, X. / The Changshagou gold deposit, Eastern Tianshan, NW China: orogenic gold mineralization overprinting a porphyry gold occurrence Mesquita, M. J., Gomes, M. E. B., Moreira, I. de C., Paes, R. A. S., Martins, H. E. da S., Matos, J. H., Ruggiero, A., Primo, G., Ducart, D. F., Poggi, L., Pimenta, V., de Laurentis, L. Z. and Kunifoshita, A. M. U. / Paleoproterozoic gold deposits at Alta Floresta Mineral Province, Brazil: two overprinted mineralizing events? Zhao, W., Zhao, X., Xue, C., Seltmann, R., Dolgopolova, A., Andersen, J. C., Cui, X. and Xing, L. / Thermochronological constraints on the exhumation history of the Carboniferous Katebasu gold deposit, western Tianshan gold belt, NW China Orogenic gold deposit case studies Combes, V., Eglinger, A., André-Mayer, A.-S., Teitler, Y., Heuret, A., Gibert, P. and Béziat, D. / Polyphase gold mineralization at the Yaou deposit, French Guiana Perret, J., André-Mayer, A.-S., Eglinger, A., Feneyrol, J., Voinot, A., Morlot, C., Barou, F., Teitler, Y., Seira, D. and Bosc, R. / Structural and geochemical ore-forming processes in deformed gold deposits: towards a multiscale and multimethod approach Smith, M., Banks, D., Ray, S. and Bowers, F. / Hypozonal gold mineralization in shear zone-hosted deposits driven by fault valve action and fluid mixing: the Nalunaq deposit, Greenland Alexandre, P. and Fayek, M. / Formation temperature and ages of the True North ‘orogenic’ gold deposit in Manitoba, Canada Gold in the surficial environment Chapman, R. J., Craw, D., Moles, N. R., Banks, D. A. and Grimshaw, M. R. / Evaluation of the contributions of gold derived from hypogene, supergene and surficial processes in the formation of placer gold deposits Chapman, R. J., Moles, N. R., Bluemel, B. and Walshaw, R. D. / Detrital gold as an indicator mineral Masson, F.-X., Beaudoin, G. and Laurendeau, D. / Multi-method 2D and 3D reconstruction of gold grain morphology in alluvial deposits: a review and application to the Rivière du Moulin (Québec, Canada) Combes, V., Teitler, Y., Eglinger, A., André-Mayer, A.-S., Heuret, A., Pochon, A., Cathelineau, M. and Gibert, P. / Diversity of supergene gold expressions and implications for gold targetting in an equatorial regolith (AMG’s Couriège Exploration Prospect, French Guiana) Leal, S., Lima, A. and Noronha, F. / Characterization of heavy mineral concentrates and detrital gold particles from the Bigorne granite-hosted gold deposit in the Iberian Variscan Belt Standish, C. D., Chapman, R. J., Moles, N. R., Walshaw, R. D. and Sheridan, J. A. / Archaeological applications of natural gold analyses Index
    Location: Reading room
    Branch Library: GFZ Library
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  • 3
    Publication Date: 2023-06-20
    Description: In 2016, an application programming interface was added to the Android operating systems, which enables the access of GNSS raw observations. Since then, an in-depth evaluation of the performance of smartphone GNSS chips is very much simplified. We analyzed the quality of the GNSS observations, especially the carrier phase observations, of the dual-frequency GNSS chip Kirin 980 built into Huawei P30 and other smartphones. More than 80 h of static observations were collected at several locations. The code and carrier phase observations were processed in baseline mode with reference to observations of geodetic-grade equipment. We were able to fix carrier phase ambiguities for GPS L1 observations. Furthermore, we performed an antenna calibration for this frequency, which revealed that the horizontal phase center offsets from the central vertical axis of the smartphone and also the phase center variations do not exceed 1–2 cm. After successful ambiguity fixing, the 3D position errors (standard deviations) are smaller 4 cm after 5 min of static observation session and 2 cm for long observation session.
    Keywords: ddc:526 ; GNSS ; Smartphone ; Carrier phase ; Antenna calibration ; Centimeter-accuracy
    Language: English
    Type: doc-type:article
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  • 4
    Publication Date: 2023-07-20
    Description: GNSS satellite and receiving antennas exhibit group delay variations (GDV), which affect code pseudorange measurements. Like antenna phase center variations, which affect phase measurements, they are frequency-dependent and vary with the direction of the transmitted and received signal. GNSS code observations contain the combined contributions of satellite and receiver antennas. If absolute GDV are available for the receiver antennas, absolute satellite GDV can be determined. In 2019, an extensive set of absolute receiver antenna GDV was published and, thus, it became feasible to estimate absolute satellite antenna GDV based on terrestrial observations. We used the absolute GDV of four selected receiver antenna types and observation data of globally distributed reference stations that employ these antenna types to determine absolute GDV for the GPS, GLONASS, Galileo, BeiDou, and QZSS satellite antennas. Besides BeiDou-2 satellites whose GDV are known to reach up to 1.5 m peak-to-peak, the GPS satellites show the largest GDV at frequencies L1 and L5 with up to 0.3 and 0.4 m peak-to-peak, respectively. They also show the largest satellite-to-satellite variations within a constellation. The GDV of GLONASS-M satellites reach up to 25 cm at frequency G1; Galileo satellites exhibit the largest GDV at frequency E6 with up to 20 cm; BeiDou-3 satellites show the largest GDV of around 15 cm at frequencies B1-2 and B3. Frequencies L2 of GPS IIIA, E1 of Galileo FOC, and B2a/B2b of BeiDou-3 satellites are the least affected. Their variations are below 10 cm.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Technische Universität Dresden (1019)
    Keywords: ddc:526 ; Absolute group delay variations ; Code-minus-carrier combination ; GPS ; GLONASS ; Galileo ; BeiDou ; QZSS
    Language: English
    Type: doc-type:article
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Gamete Research 8 (1983), S. 295-307 
    ISSN: 0148-7280
    Keywords: sprem ; mitochondrion ; calcium ; calmodulin ; actin ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The ascidian sperm reaction, Which involves swelling, migration, and loss of the single large mitochondrion, can be triggered in vitro by raising the seawater pH to 9.3 or lowering Na+ to 20 mM, but only if the sperm are allowed to attach to a suitable Substate. Mitochondrial translocation does not usually occur in the absence of sperm attachment. Extracellular Ca2+ is necessary for triggering the reaction with low Na+ but not high pH; however, the intrecellular Ca2+ blocker, TMB-8, inhibits high pH-induced mitochondrial movement in the absence of extracellular Ca2+. After swelling, the mitochondrion fluoresces in the presence of chlortetracycline, suggesting that Ca2+ becomes membranebound after activation. Elevated cAMP and theophylline both inhibit mitochondrial move ment but not sperm motility. The antiactin drug cytochalasin B(10μM) and the calmodulinblocking drugs TFP (1 μM) and W-13 (10 μM) block mitochondrial movement, suggesting roles for actin and calmodulin in mitochondrial movement. A model is proposed relating intracellular alkalinization, Ca2+ influx, actin, myosin, and calmodulin in mitochondrial translocation.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 1982-12-01
    Print ISSN: 0167-4781
    Electronic ISSN: 1879-2634
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Published by Elsevier
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  • 7
    Publication Date: 1982-09-01
    Print ISSN: 0006-291X
    Electronic ISSN: 1090-2104
    Topics: Biology , Chemistry and Pharmacology , Physics
    Published by Elsevier
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  • 8
    Publication Date: 1982-07-01
    Print ISSN: 0006-291X
    Electronic ISSN: 1090-2104
    Topics: Biology , Chemistry and Pharmacology , Physics
    Published by Elsevier
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  • 9
    Publication Date: 1984-12-01
    Print ISSN: 0012-1606
    Electronic ISSN: 1095-564X
    Topics: Biology
    Published by Elsevier
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  • 10
    Publication Date: 1981-12-01
    Print ISSN: 0012-1606
    Electronic ISSN: 1095-564X
    Topics: Biology
    Published by Elsevier
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