A5074338876- Planetary Science and Exploration
- Geological and Geochemical Analysis
- Astro and Planetary Science
- Space Exploration and Technology
- Geology and Paleoclimatology Research
- Space Satellite Systems and Control
- earthquake and tectonic studies
- Isotope Analysis in Ecology
- Astrophysics and Star Formation Studies
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Geologic Mapping
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
- Spectroscopy and Laser Applications
- Paleontology and Stratigraphy of Fossils
- Geological Studies and Exploration
- Laser Design and Applications
- Cardiac, Anesthesia and Surgical Outcomes
- High-Velocity Impact and Material Behavior
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- High-pressure geophysics and materials
- Spacecraft Design and Technology
The Open University
2001-2021
Technical University of Munich
2021
Space Applications Services (Belgium)
2021
Dynamic Imaging (United Kingdom)
2021
University College London
2013-2017
Transnational Press London
2015
Abstract Atlantic‐type continental margins have long been considered “passive” tectonic settings throughout the entire postrift phase. Recent studies question long‐term stability of these and shown that uplift reactivation preexisting structures may be a common feature margin's evolution. The Namaqualand sector western margin South Africa is characterized by ubiquitously faulted basement but lacks preservation younger geological strata to constrain fault activity. Here we present first...
We present the first in situ direct measurement of composition particles Saturn's rings. The Cassini cosmic dust analyser (CDA) measured mass spectra nearly 300 impacting during 2004 October E ring crossing. An initial interpretation data shows that are predominantly water ice, with minor contributions from possible combinations silicates, carbon dioxide, ammonia, molecular nitrogen, hydrocarbons and perhaps monoxide. This places constraints on both Enceladus, main source ring, as well grain...
Abstract The timing and mechanisms involved in creating the elevated, low‐relief topography of South African plateau remain unresolved. Here we constrain thermal history Southwest since 300 Ma by using apatite fission track (AFT) (U‐Th‐Sm)/He (AHe) thermochronology. Archean rocks from center Kaapvaal Craton yield AFT ages 331.0 ± 11.0 379.0 23.0 mean lengths (MTLs) 11.9 0.2 12.5 0.3 µm. Toward southwest margin craton adjacent Paleozoic mobile belt, are significantly younger range 58.9 5.9 to...
Cenozoic opening of the central Scotia Sea involved tectonic translation crustal blocks to form North Ridge, which today is a major topographic constriction flow deep Antarctic Circumpolar Current that keeps Antarctica thermally isolated from warmer ocean waters. How this ridge developed and whether it was barrier in past are unknown. To address we investigated history South Georgia microcontinental block, exposed part ridge. Detrital zircon U-Pb geochronology data confirm Cretaceous...
Abstract New data from a gem-quality feldspar Itrongay, Madagascar, record naturally occurring 40 Ar/ 39 Ar age profiles which can be numerically modelled by invoking single diffusion mechanism and show that microtexturally simple crystals are capable of recording complex thermal histories. We present the longest directly measured, produced Ar*-closure single, homogeneous orthoclase feldspar. These appear to confirm assumption laboratory derived parameters valid in nature over geological...
Our current knowledge about the Moon's resource potential is limited to remote-sensing measurements and analysis of Apollo-era samples. Even though there are persistent indications for substantial deposits water other volatiles—especially in lunar polar regions—high-resolution mapping situ required assess technical feasibility economic viability exploiting them. The LUVMI-X mission will use a 50-kg rover equipped with complementary instrumentation prospect illuminated shadowed areas regions...
New insights into interferences on helium isotope measurements, using a noble gas mass spectrometer, as function of ion source trap current and filament voltage.
An appeal for witnesses to a fireball on 24 September produced an excellent response from the public; 55 eyewitnesses sent accounts. From their observations we calculated radiant azimuth as 320°, and altitude angle ≤ 20°. Without video or CCTV footage control fireball's velocity pre-entry orbit, used software developed dust impact experiments, assess most likely orbital trajectory. The highest probability solutions have semimajor axis between 1.6 2.0 AU eccentricity of 0.4 0.5, corresponding...