全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
中外文文献  中文文献  外文文献
作者:Tobias Häger , Regina Mertz-Kraus
来源:[J].Mineralium Deposita(IF 2.147), 2017, Vol.52 (5), pp.641-649Springer
摘要:Direct dating of corundum and the establishment of age constraints for corundum crystal growth are restricted due to the absence of a geochronometer. Syngenetic mineral inclusions may help define minimum ages for corundum growth. Here, we present results of in situ LA-ICP-MS...
作者:Tobias Häger , Aron Salvona
来源:[J].Journal of Structural Geology(IF 2.285), 2016, Vol.88, pp.46-62Elsevier
摘要:Abstract(#br)The Lower Cretaceous Twyfelfontein sandstone formation in the Huab Basin in NW Namibia shows the effects of volcanic activity on a potential reservoir rock. The formation was covered by the Paraná-Etendeka Large Igneous Province shortly before or during the onse...
作者:... Mathias Mehofer , Eugen Libowitzky , Tobias Häger
来源:[J].Mineralogy and Petrology(IF 1.681), 2009, Vol.97 (1-2), pp.129-138Springer
摘要:Abstract(#br)Zircon samples without and with secondary chemical alteration from diverse sources were subjected to heat treatment at 1400 °C for 96 h. Resulting new phases and textures suggest that decomposition of zircon into component oxides occurred in all experiments to v...
作者:Tobias Häger , Nguyen Van Nam
来源:[J].Neues Jahrbuch für Mineralogie - Abhandlungen(IF 0.755), 2016, Vol.193 (2), pp.161-181Schweizerbart
摘要:Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietn...
作者:Tobias Häger , Alfred Kröner
来源:[J].Geostandards and Geoanalytical Research(IF 2.77), 2008, Vol.32 (3), pp.247-265Wiley
摘要:We introduce and propose zircon M257 as a future reference material for the determination of zircon U‐Pb ages by means of secondary ion mass spectrometry. This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14 g (25.7 carats). Zircon M257 has TIMS‐d...
作者:Tobias Häger , Regina Mertz-Kraus ...
来源:[J].American Mineralogist(IF 2.204), 2016, Vol.101 (12), pp.2716-2722De Gruyter
摘要:Abstract The term “ontogeny,” which is commonly used in biology, was introduced into the Earth sciences in 1961 to include the genesis and evolution of single crystals and crystal aggregates. The term encompasses nucleation, growth, alteration , and destruction . We present ...
作者:Tobias Häger , Pornsawat Wathanakul
来源:[J].Applied Mechanics and Materials, 2017, Vol.4430, pp.15-19Trans Tech
摘要:The red color of ruby is caused by Cr3+ impurities substituting Al3+ in Al2O3 structure. The complete substitution of Al3+ by Cr3+ produces Cr2O3 that has the green color. In this study, we focused on the phase transition of solid solut...
作者:... Dariusz Malczewski , Tobias Häger , Wolfgang Hofmeister
来源:[J].Solid State Phenomena, 2013, Vol.2500, pp.331-334Trans Tech
摘要:Metamict minerals contain radioactive elements that degrade their crystal structure. During the annealing process under ambient pressure in argon atmosphere the sample of metamict rinkite recrystallizes to the primary crystalline form at 700°C. Further heating leads to the f...

我们正在为您处理中,这可能需要一些时间,请稍等。

资源合作:cnki.scholar@cnki.net, +86-10-82896619   意见反馈:scholar@cnki.net

×