Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Dorothee Hippler"'
The Calcium Isotope (δ44/40Ca) Record Through Environmental Changes: Insights From the Late Triassic
Autor:
Zsófia Kovács, Isaline Demangel, Andre Baldermann, Dorothee Hippler, Anne‐Désirée Schmitt, Sophie Gangloff, Leopold Krystyn, Sylvain Richoz
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 23, Iss 12, Pp n/a-n/a (2022)
Abstract Calcium isotopes (δ44/40Ca) are particularly useful in palaeo‐environmental studies due to the key role of carbonate minerals in continental weathering and their formation in seawater. The calcium isotope ratio can provide hints on past c
Externí odkaz:
https://doaj.org/article/5e50ba76f3bb43479d5262d1dd45385b
Autor:
Andre Baldermann, Florian Mittermayr, Stefano M. Bernasconi, Martin Dietzel, Cyrill Grengg, Dorothee Hippler, Tobias Kluge, Albrecht Leis, Ke Lin, Xianfeng Wang, Andrea Zünterl, Ronny Boch
Publikováno v:
Communications Earth & Environment, Vol 1, Iss 1, Pp 1-12 (2020)
Palaeo-environmental conditions can be recorded in low-temperature continental archives, according to geochemical and isotopic analyses of dolomitic fracture infills at Erzberg, Austria
Externí odkaz:
https://doaj.org/article/3f26728748e644b3874685dd1aa12816
Publikováno v:
MethodsX, Vol 7, Iss , Pp 100847- (2020)
We undertook 87Sr/86Sr analyses for a range of carbonate bearing geological reference materials, and combined these with δ26Mg for a subset of samples. Following chemical purification in a series of chromatographic extractions, isotope ratios were m
Externí odkaz:
https://doaj.org/article/9b632af6eafd4e2b8ed46f6907f7c3fc
Autor:
Jessica A. Stammeier, Bettina Purgstaller, Dorothee Hippler, Vasileios Mavromatis, Martin Dietzel
Publikováno v:
MethodsX, Vol 5, Iss , Pp 1241-1250 (2018)
Amorphous calcium phosphate (Ca3(PO4)2xnH2O; n = 3–4.5; ACP) is a precursor phase of the mineral hydroxyapatite (Ca5(PO4)3(OH); HAP) that in natural settings occurs during both authigenic and biogenic mineral formation. In aqueous solutions ACP tra
Externí odkaz:
https://doaj.org/article/fd83d3cf84fe4d5bab0c9a37ac763418
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-10 (2017)
The Ediacaran–Cambrian oxygenation of seawater is thought to have been caused by lifeforms engaging in ecosystem engineering. Here, the authors show that siliceous sponges increased seawater dissolved oxygen concentrations by redistributing organic
Externí odkaz:
https://doaj.org/article/8e56765edc78499c80fc45d1e8e13087
Autor:
Ronny Boch, Albrecht Leis, Edith Haslinger, Johann E. Goldbrunner, Florian Mittermayr, Heinz Fröschl, Dorothee Hippler, Martin Dietzel
Publikováno v:
Geothermal Energy, Vol 5, Iss 1, Pp 1-19 (2017)
Abstract Background Mineral precipitates (scaling) from deep saline thermal waters often constitute a major problem during geothermal energy production. The occurrence of scale-fragments accumulating and clogging pipes, filters, and heat exchangers i
Externí odkaz:
https://doaj.org/article/933699aa3cc84e299e96018f9f147cd1
Silicate mineral weathering and the resulting formation of clay minerals are key processes at the Earth’s surface. Reverse weathering reactions regulate the evolution of ocean pH and chemistry, atmospheric carbon dioxide budget, soil formation and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d7fa8cc1836ab1d4ed7f4a8c69fa34f
https://doi.org/10.5194/egusphere-egu23-14655
https://doi.org/10.5194/egusphere-egu23-14655
Publikováno v:
Hydrological Sciences Journal. 65:583-596
This study aims to differentiate the potential recharge areas and flow mechanisms in the North-eastern Basin, Palestine. The results differentiate the recharge into three main groups. The first is ...
Autor:
Stefanie Eichinger, Josef Nievoll, Doria Haller, Harald Fritz, Dorothee Hippler, Christoph Hauzenberger, Isabella Haas, Magdalena Mandl
Publikováno v:
Gondwana Research. 77:204-222
We compare detrital U/Pb zircon age spectra of Carboniferous and Permian / Lower Triassic sedimentary rocks from different structural positions within the Austroalpine nappe pile with published ages of magmatic and metamorphic events in the Eastern A
Autor:
Wencke Wegner, Dorothee Hippler, Monika Horschinegg, Urs Klötzli, Gabriella Ilona Kiss, László Palcsu, Gábor Újvári
Publikováno v:
Rapid Communications in Mass Spectrometry. 35
RATIONALE Complete decomposition of silicate rock matrices is crucial in determining their isotopic compositions, but acid dissolution in a high-pressure steel-jacketed bomb, which has been the only powerful, effective technique thus far, is time-con