Ein neues Euklasvorkommen in den Ostalpen     

Heinz Meixner 《Mineralogy and Petrology》1957,6(3):246-251

Ohne ZusammenfassungMit 2 Textabbildungen  相似文献   

Pumpellyit in Miarolen des Granits vom Königskopf bei Braunlage im Harz,Deutschland     

Prof. Dr. Heinz Meixner 《Mineralogy and Petrology》1965,10(1-4):341-348

Zusammenfassung Abweichend zu den bisher bekannten Pumpellyitparagenesen in vorwiegend basischen Gesteinen, wird hier das etwas überraschende Auftreten von Pumpellyit in Granitmiarolen des harzes beschrieben. Pumpellyit schiebt sich in der Sukzession und danach wohl auch im Bildungsverlauf zwischen Epidot und Zeolithen ein. Das Mineral, oft übersehen oder nicht richtig erkannt, ist ebenso in granitischen Miarolen anderer Gebiete zu erwarten, wie auch seine Erkennung als Schwermineral erst in den Anfängen steckt.

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Summary In contrast to hitherto known parageneses of pumpellyite in predominantly basic rocks, the somewhat surprising occurrence of pumpellyite in miaroles of granite of the Harz mountains is here reported. Pumpellyite enters in the succession between epidote and zeolite. This mineral, often overlooked or not correctly recognized, can also be expected to occur in miaroles of granites in other areas. It is only beginning to be recognized as a heavy mineral.

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Herrn Professor Dr.F. Machatschki zum 70. Geburtsag gewidmet.  相似文献   

Interdecadal modulation of the relationship between ENSO,IPO and precipitation: insights from tree rings in Australia     

Ingo Heinrich  Kathrin Weidner  Gerhard Helle  Heinz Vos  Janette Lindesay  John C. G. Banks 《Climate Dynamics》2009,33(1):63-73

Australian climate-proxy reconstructions based on tree rings from tropical and subtropical forests have not been achieved so far due to the rarity of species producing anatomically distinct annual growth rings. Our study identifies the Australian Red Cedar (Toona ciliata) as one of the most promising tree species for tree-ring research in Australasia because this species exhibits distinct annual tree rings, a prerequisite for high quality tropical dendroclimatology. Based on these preliminary studies, we were able, for the first time in subtropical and tropical Australia, to develop a statistically robust, precisely dated and annually resolved chronology back to AD1854. We show that the variability in ring widths of T. ciliata is mainly dependent on annual precipitation. The developed proxy data series contains both high- and low-frequency climate signals which can be associated with the El Niño Southern Oscillation (ENSO) and the Interdecadal Pacific Oscillation (IPO). A comparison of different data sets (Brisbane precipitation, tree rings, coral luminescence record from the Great Barrier Reef, ENSO and IPO) revealed non-stationary correlation patterns throughout the twentieth century but little instability between the new tree-ring chronology and Brisbane precipitation.  相似文献   

基于离散元方法对走滑拉分盆地演化及次级断裂扩展过程研究     

刘源  KONIETZKY Heinz 《地质力学学报》2019,25(5):840-852

拉分盆地是一种与走滑断裂带密切相关的特殊拉张构造,因其重要的构造意义,及其与火山活动、中小地震群集、特殊的成矿作用间的伴生关系而受到研究者的高度重视。关于拉分盆地的形成演化过程,已有较多的研究成果,但是由于研究手段的限制,缺少对盆地演化中次级断裂扩展过程的研究。基于离散元的数值计算方法是研究断裂扩展方式的理想方法。本文采用基于离散元的颗粒流方法,揭示纯走滑拉分盆地发育过程中的断裂扩展和连接过程,为拉分盆地演化机理和断裂扩展提供新的研究方法。同时,根据主走滑断层与块体运动方向的夹角不同,建立不同的张扭性拉分盆地模型,系统研究张扭性盆地的断裂扩展和演化机理。将上述理论研究结果与死海盆地等经典拉分盆地实例相结合,探讨了死海盆地、土耳其Cinarcik盆地、哥伦比亚El Paraiso盆地等的形成演化机理和断裂扩展方式。   相似文献   

Bonded-particle model-based simulation of artificial rock subjected to cyclic loading     

Song  Zhengyang  Konietzky  Heinz  Herbst  Martin 《Acta Geotechnica》2019,14(4):955-971

A nonlinear parallel-bonded stress corrosion (NPSC) model is proposed to simulate the fatigue characteristics of artificial rock (concrete) during cyclic loading. Numerical simulations of fatigue tests replicate the main mechanical features of concrete specimens subjected to cyclic loading observed in the laboratory. A nonlinear reduction speed of the bond diameter between two bonded particles represents the damage rate induced by the fatigue load. The damage rate is proportional to the maximum cyclic load level when the minimum cyclic load level is fixed. Compared with laboratory data, a logarithmic function of bond diameter in the NPSC model resulted in the best fit to simulate the fatigue behaviour of concrete. The simulation includes acoustic emission (AE) monitoring during fatigue tests. The axial strain of the assembly is governed by the evolution of bond breakages. The sum of released bond strain energy is documented as value proportional to cumulative AE energy. The simulation results show very similar evolution compared with laboratory data, which verifies the effectiveness of AE energy simulation.

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Quantitative Untersuchungen über Echolotungen mit Magnetostriktionsschwingern     

Heinz Gabler 《Ocean Dynamics》1950,3(5-6):341-353

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Mitigation of Oceanic Tidal Aliasing Errors in Space and Time Simultaneously Using Different Repeat Sub-Satellite Tracks from Pendulum-Type Gravimetric Mission Candidate     

Basem Elsaka  Karl Heinz Ilk  Abdulaziz Alothman 《Acta Geophysica》2015,63(1):301-318

This contribution investigates two different ways for mitigating the aliasing errors in ocean tides. This is done, on the one hand, by sampling the satellite observations in another direction using the pendulum satellite mission configuration. On the other hand, a mitigation of the temporal aliasing errors in the ocean tides can be achieved by using a suitable repeat period of the sub-satellite tracks.The findings show, firstly, that it is very beneficial for minimizing the aliasing errors in ocean tides to use pendulum configuration; secondly, optimizing the orbital parameter to get shorter repeat orbit mode can be effective in minimizing the aliasing errors. This paper recommends the pendulum as a candidate for future gravity mission to be launched in longer repeating orbit mode with shorter “sub-cycle” repeat periods to improve the temporal resolution of the satellite mission.  相似文献   

Statement to comment by K. Föllmi on ,,Neubenennungen lithostratigraphischer Einheiten in der helvetischen Kreide“     

Schweizerisches Komitee für Stratigraphie  Thierry Adatte  Jean-Pierre Berger  Hansruedi Bläsi  Reto Burkhalter  Stephan DallAgnolo  Danielle Decrouez  Hanspeter Funk  Heinz Furrer  Yves Gouffon  Hansruedi Graf  Werner Heckendorn  Wilfried Winkler 《Swiss Journal of Geoscience》2009,102(3):519-519

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Automated mapping of rock slope geometry,kinematics and stability with RSS-GIS   总被引：2，自引：0，他引：2  

Andreas Günther  Jan Wienhöfer  Heinz Konietzky 《Natural Hazards》2012,61(1):29-49

A GIS-implemented, deterministic approach for the automated spatial evaluation of geometrical and kinematical properties of rock slope terrains is presented. Based on spatially distributed directional information on planar geological fabrics and DEM-derived topographic attribute data, the internal geometry of rock slopes can be characterized on a grid cell basis. For such computations, different approaches for the analysis and regionalization of available structural directional information applicable in specific tectonic settings are demonstrated and implemented in a GIS environment. Simple kinematical testing procedures based on feasibility criteria can be conducted on a pixel basis to determine which failure mechanisms are likely to occur at particular terrain locations. In combination with hydraulic and strength data on geological discontinuities, scenario-based rock slope stability evaluations can be performed. For conceptual investigations on rock slope failure processes, a GIS-based specification tool for a 2-D distinct element code (UDEC) was designed to operate with the GIS-encoded spatially distributed rock slope data. The concepts of the proposed methodology for rock slope hazard assessments are demonstrated at three different test sites in Germany.  相似文献   

Lippmann Diagrams: Theory and Application to Carbonate Systems     

Heinz Gamsjäger  Erich Königsberger  Wolfgang Preis 《Aquatic Geochemistry》2000,6(2):119-132

Since 1980 when F. Lippmann's seminal paper appeared, ourunderstanding of solubility equilibria involving ionic solidsolutions has been advanced by theoretical considerations as wellas careful experimental studies designed to determine excess Gibbsfunctions. A unified theory of solid-solution aqueous-solutionequilibria as well as the thermodynamic background of thephenomenon of ``stoichiometric saturation' are reviewed.It is shown that Lippmann diagrams effectively summarize thethermodynamic basis of solid-solute aqueous-solution equilibria ofsparingly soluble metal carbonate systems. Clearly, the predictivepower of these diagrams may be limited due to kineticrestrictions. Only when dissolution and precipitation areessentially reversible, favourable conditions to synthesizehomogeneous solid phases can be derived from studies of equilibria.  相似文献