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RISS 인기검색어
- 검색키워드
- 저자 : Miruts Hagos (검색결과 2 건)
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Alebachew T. Kehali,Miruts Hagos,Zelalem L. Anteneh,Getnet T. Bawoke 한국지질과학협의회 2021 Geosciences Journal Vol.25 No.6
Matured continental rift zones that imprint the complete cycle of rifting are rare deformation environments in the globe. The western Afar margin is one that shows such a complete process. This research is aimed to understand the development of the lower part of the western Afar margin and determine the nature of transfer zones that host the mega dike injections, the elliptical scoria cones, and rhyolitic domes around Gulina area. To do so, structural analyses were conducted using intensive field measurements, Landsat ETM+, and SPOT imageries, and digital elevation models (DEM) data to comprehend chronologically distinct structures and magmatic series. The result shows that marginal structures are represented by older rift bounding NNW-SSE trending faults and younger NE-SW oriented transverse structures. Mode of emplacement of these two structurally and chronologically distinct structures are found associated with the evolution of the marginal magmatic series. The study has also investigated NE-SW trending offset faults and NE-SW striking transversal structures. Moreover, this work shows that the marginal structures are inactive but the younger structures (mega dikes and scoria cones are active and controlled by regional transversal structures that separate the Erta’Ale range and Tendaho-MandaHararo rift segment). From the recognition of the cross-cutting relationship, the marginal faults are identified as firstgeneration fractures, whereas the deformed domical silicified rhyolite outcrops situated in the marginal areas are classified under the second generation. The preserved rhyolite dome in the rift floor, the scoria cones, rift floor fractures, and dikes are found to be thirdgeneration structures.
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The Europlanet Research Infrastructure: Planetary Field Analogues
Barbara Cavalazzi,Fulvio Franchi,Viggo Marteinsson,Keld Rasmussen,Jon Merrison,Felipe Gomez,Fernando Gomez,Miruts Hagos,Yang Liu,Anita Heward,Nigel Mason,Gareth Davies 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
The Europlanet 2024 Research Infrastructure provides access to well characterised field sites that represent the most realistic terrestrial geological-geomorphological analogues for volcanic, dry-and humid-cold, hot, highly saline and metalliferous and impact conditions for studies in support of current and forthcoming missions to Mars, the Moon and the icy moons of Jupiter. Europlanet 2024 RI offers free ‘transnational access’ to seven diverse PFA sites around the world that have been comprehensively characterised. This enables researchers to undertake multi-disciplinary research programmes in support of planetary missions allowing to: • quantify the complex (bio) geo-chemical feed-back processes that control planetary evolution: • develop (quantified) models to explain observations of planets in our Solar System from rovers: orbiting instruments, and ground-based observations and (potentially) interpret data from exoplanets. • study the processes that influence the strategy and adaption of life to extreme conditions: • test our ability to detect unambiguously records of past or present biological activity: • test new instrumentation and operational systems for future planetary space missions under fully operational conditions: Iceland offers a multitude of different environments, including glacial and sub-glacial environments, lava fields of different ages, volcanic areas and active hydrothermal systems. The Greenland Kangerlussuaq field site provides excellent access to a glacial ice sheet and regions with permafrost, glacial sediment deposits and also glacial run-off which meets the ocean. The Makgadikgadi pans of Botswana represent the largest inland evaporitic basin in the world. The pans provide different environments that vary from the playa lake with the ephemeral spring to a fossil dunes field. The unique nature of Rio Tinto, Spain, is caused by rock-water-biology interactions that produces a river with a pH of ~ 2.3 over a length of ~ 100 km. Unfortunately, due to political instability, the acidic hydrothermal and highly saline environments of the Danakil Depression in Ethiopia are currently inaccessible. However, two new field areas will be made available for Europlanet TA access in subsequent calls: i) the Qaidam Basin in the north of the Tibetan Plateau includes Mars-analog lacustrine environments and ii) the Puna, Patagonia and Tierra del Fuego regions in Argentina provide access to cold and wet-cold, extreme glacial and lacustrine environments. The presentation will briefly review the characteristics of the Planetary Field Analogues. More details are available at: https://www.europlanet-society.org/europlanet-2024-ri/ta1-pfa/
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