Ewald Hejl

ORCID: 0000-0003-3011-9232
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Geological and Geochemical Analysis
  • Geology and Paleoclimatology Research
  • earthquake and tectonic studies
  • Geological Formations and Processes Exploration
  • Image Processing and 3D Reconstruction
  • Geological Studies and Exploration
  • Ancient and Medieval Archaeology Studies
  • Geochemistry and Geologic Mapping
  • Marine and environmental studies
  • Maritime and Coastal Archaeology
  • Paleontology and Stratigraphy of Fossils
  • Landslides and related hazards
  • Geological Modeling and Analysis
  • High-pressure geophysics and materials
  • Ancient Mediterranean Archaeology and History
  • Origins and Evolution of Life
  • Geological and Geophysical Studies Worldwide
  • Geological and Tectonic Studies in Latin America
  • Nuclear Physics and Applications
  • Hydrocarbon exploration and reservoir analysis
  • Civil and Structural Engineering Research
  • Archaeology and ancient environmental studies
  • Engineering and Materials Science Studies
  • Historical and Archaeological Studies
  • Molecular spectroscopy and chirality

University of Salzburg
1997-2023

Goethe University Frankfurt
1997

Max Planck Institute for Nuclear Physics
1990-1994

Max Planck Society
1991

The post‐Carboniferous crustal evolution of the German Continental Deep Drilling Program (KTB) area, as summarized in this paper, could not be predicted from surface observations: deep drilling was essential for its revelation. most conspicuous and unexpected feature discovered drill hole is absence marked gradients with respect to pre‐Carboniferous record. There are no depth‐related differences K‐Ar cooling ages hornblende white mica, petrology or lithology. All metamorphic rocks...

10.1029/96jb02565 article EN Journal of Geophysical Research Atmospheres 1997-08-10

We summarize the available geological information on Sierra Maestra Mountains in southeastern Cuba and report new zircon fission track biotite Ar-Ar ages for this region. Two different genetically unrelated volcanic arc sequences occur Maestra, one Cretaceous age (pre-Maastrichtian) restricted to a few outcrops southern coast, other Palaeogene age, forming main expression of mountain range. These two are overlain by middle late Eocene siliciclastic, carbonatic terrigenous rocks as well...

10.1344/105.000000361 article EN Geologica Acta 2006-01-11

We have investigated the low‐temperature history of pre‐Neogene basement areas adjacent to western extension North Anatolian Fault zone (NAFZ) by apatite fission track thermochronology 33 samples taken from Marmara island, Kapidag peninsula (both in Sea Marmara), Samothrake and Chalkidike Aegean region). Together with already published data 30 other sampling localities region, these (63 total) been evaluated mainly regard transitional period Mesohellenic orogeny (Eocene‐Oligocene)...

10.1029/2010jb007402 article EN Journal of Geophysical Research Atmospheres 2010-10-01

43 samples from Aegean islands, Thessaly, Mt.Ossa and Pelion were investigated by apatite fi ssion-track thermochronology.The measured cooling ages of the Cyclades Ikaria have a distinct frequency maximum between 7 11 Ma (Tortonian, Late Miocene) which was time strong crustal extension in south back-arc position.These also refl ect stage primary peneplanation with fast denudation intensive weathering under warm humid conditions.The subsequent exhumation peneplainʼs basal relief occurred...

10.1127/1860-1804/2008/0159-0495 article EN Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 2008-09-01

Abstract Resolving the Mesozoic and Cenozoic palaeogeography geomorphologic development of outcropping Variscan basement is a pre-condition for understanding central European geodynamics. For our study, we have applied apatite fission-track (AFT) (U–Th)/He (AHe) thermochronology to surface rocks southeastern Bohemian Massif. 46 samples were examined by AFT method. Additional AHe dating was 8 them. The ages range from 251 ± 60.2 4.8 Ma. 25 525 Ma with rather high intra-sample scatter. On...

10.1007/s00531-023-02294-6 article EN cc-by International Journal of Earth Sciences 2023-02-15

10.1127/njma/2017/0049 article EN Neues Jahrbuch für Mineralogie - Abhandlungen Journal of Mineralogy and Geochemistry 2017-01-01

10.1016/0009-2541(95)00014-d article EN Chemical Geology 1995-05-01

10.1016/0168-9622(91)90029-v article EN Chemical Geology Isotope Geoscience section 1991-08-01

Chromatographic interaction between infiltrating solutions of racemic mixtures enantiomers and enantiomorphic minerals with chiral excess has been proposed as a scenario for the emergence biomolecular homochirality. Enantiomer separation is supposed to be produced by different partition coefficients both regard crystal faces or walls capillary tubes in mineral. Besides quartz, nepheline only common magmatic mineral symmetry. It crystallizes from SiO2-undersaturated melts low viscosity...

10.3390/sym10090410 article EN Symmetry 2018-09-18

Homochiral proteins orchestrate biological functions throughout all domains of life, but the origin uniform l-stereochemistry amino acids remains unknown. Here, we describe enantioselective adsorption experiments racemic alanine and leucine onto homochiral d- l-quartz as a possible mechanism for abiotic emergence homochirality. Substantial racemate resolution with enantiomeric excesses up to 55% are demonstrated potentially occur in interstitial pores, along grain boundaries or small...

10.3390/life11111222 article EN cc-by Life 2021-11-11
Coming Soon ...