FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3107031427> ?p ?o ?g. }

• W3107031427 abstract "Introduction: Ultracarbonaceous Antarctic Micrometeorites (UCAMMs) are dominated by N-rich polyaromatic organic matter exhibiting large D enrichments [1-5]. The high abundance of organic matter exhibiting large D enrichment suggests a cometary origin for UCAMMs [1-3]. Three kinds of organic matter are identified in UCAMMs, with different nitrogen abundances and highly variable concentrations of small (typically 30-500 nanometer) mineral aggregates embedded in the organic matter [5-8]. We focus here on a mineral assemblage embedded in one UCAMM that exhibits evidence of ion irradiation, to get insight on the formation and evolution of this cometary particle. Sample and methods: A fragment of UCAMM DC06-06-43 (hereafter DC06-43) was carbon coated, observed by SEM/EDX, and a 100 nm thick FIB section of this fragment was made at IEMN Lille. The size of the initial UCAMM before fragmentation was ~ 25 x 30 µm. After STXM-XANES analysis, the mineralogy of the sample was investigated by TEM at UMET Lille using a FEI Tecnai G2 20 at 200 kV and FEI TITAN Themis at 300 kV [9]. Results : TEM examination reveals a large assemblage of crystalline minerals at the center of the DC06-43 UCAMM fragment, surrounded by organic matter (Figure 1) [9]. The assemblage consists of µm-to subµm sized Mg-rich pyroxenes, a large triskell-shaped Fe-sulfide, a few Mg-rich olivines, and minor Si-Al-Carich amorphous pockets and Fe-Ni metal. About 28 crystalline pyroxenes are identified whereas only 5 olivine crystals are observed in the section. GEMS are present embedded in the organic matter, close to the crystalline assemblage. We identified irradiation features (rims and tracks) in pyroxene grains. No rims or tracks were found in olivine. We observed irradiated rims around six pyroxenes at the top of the section (Figure 1, light blue labels). One pyroxene shows a continuous irradiated rim (Figure 2 top). Rim thicknesses range from 20 to 100 nm, with an average of 60 ± 20 nm (1σ) (Figure 2 bottom). Fe-rich deposits are occasionally found on top of irradiated rims. EDX mappings and profiles show that the rims are strongly depleted in Mg (Figure 3). The average track density in pyroxene grains measured over an area of 4.5 x 10-8 cm 2 is 1.3 x 10 10 cm-2 with one value at 3.8 x 10 9 cm-2 , the other values ranging from 9.5 x 10 9 to 3.2 x 10 10 cm-2 (Figure 4). Irradiation track lengths" @default.
• W3107031427 created "2020-12-07" @default.
• W3107031427 creator A5000351641 @default.
• W3107031427 creator A5010183654 @default.
• W3107031427 creator A5011178605 @default.
• W3107031427 creator A5012017317 @default.
• W3107031427 creator A5014069957 @default.
• W3107031427 creator A5025141070 @default.
• W3107031427 creator A5033702197 @default.
• W3107031427 creator A5065188913 @default.
• W3107031427 creator A5068025414 @default.
• W3107031427 creator A5073768133 @default.
• W3107031427 creator A5084943421 @default.
• W3107031427 date "2020-03-18" @default.
• W3107031427 modified "2023-10-11" @default.
• W3107031427 title "Evidence of irradiation in interplanetary space in minerals from an ultracarbonaceous Antarctic micrometeorites (UCAMM)" @default.
• W3107031427 hasPublicationYear "2020" @default.
• W3107031427 type Work @default.
• W3107031427 sameAs 3107031427 @default.
• W3107031427 citedByCount "0" @default.
• W3107031427 crossrefType "proceedings-article" @default.
• W3107031427 hasAuthorship W3107031427A5000351641 @default.
• W3107031427 hasAuthorship W3107031427A5010183654 @default.
• W3107031427 hasAuthorship W3107031427A5011178605 @default.
• W3107031427 hasAuthorship W3107031427A5012017317 @default.
• W3107031427 hasAuthorship W3107031427A5014069957 @default.
• W3107031427 hasAuthorship W3107031427A5025141070 @default.
• W3107031427 hasAuthorship W3107031427A5033702197 @default.
• W3107031427 hasAuthorship W3107031427A5065188913 @default.
• W3107031427 hasAuthorship W3107031427A5068025414 @default.
• W3107031427 hasAuthorship W3107031427A5073768133 @default.
• W3107031427 hasAuthorship W3107031427A5084943421 @default.
• W3107031427 hasBestOaLocation W31070314271 @default.
• W3107031427 hasConcept C108411613 @default.
• W3107031427 hasConcept C111337013 @default.
• W3107031427 hasConcept C111919701 @default.
• W3107031427 hasConcept C121332964 @default.
• W3107031427 hasConcept C127313418 @default.
• W3107031427 hasConcept C185544564 @default.
• W3107031427 hasConcept C194462397 @default.
• W3107031427 hasConcept C2778572836 @default.
• W3107031427 hasConcept C2993820636 @default.
• W3107031427 hasConcept C32449521 @default.
• W3107031427 hasConcept C41008148 @default.
• W3107031427 hasConcept C539450922 @default.
• W3107031427 hasConcept C82706917 @default.
• W3107031427 hasConcept C87355193 @default.
• W3107031427 hasConceptScore W3107031427C108411613 @default.
• W3107031427 hasConceptScore W3107031427C111337013 @default.
• W3107031427 hasConceptScore W3107031427C111919701 @default.
• W3107031427 hasConceptScore W3107031427C121332964 @default.
• W3107031427 hasConceptScore W3107031427C127313418 @default.
• W3107031427 hasConceptScore W3107031427C185544564 @default.
• W3107031427 hasConceptScore W3107031427C194462397 @default.
• W3107031427 hasConceptScore W3107031427C2778572836 @default.
• W3107031427 hasConceptScore W3107031427C2993820636 @default.
• W3107031427 hasConceptScore W3107031427C32449521 @default.
• W3107031427 hasConceptScore W3107031427C41008148 @default.
• W3107031427 hasConceptScore W3107031427C539450922 @default.
• W3107031427 hasConceptScore W3107031427C82706917 @default.
• W3107031427 hasConceptScore W3107031427C87355193 @default.
• W3107031427 hasLocation W31070314271 @default.
• W3107031427 hasLocation W31070314272 @default.
• W3107031427 hasLocation W31070314273 @default.
• W3107031427 hasLocation W31070314274 @default.
• W3107031427 hasOpenAccess W3107031427 @default.
• W3107031427 hasPrimaryLocation W31070314271 @default.
• W3107031427 hasRelatedWork W1512678301 @default.
• W3107031427 hasRelatedWork W1518659183 @default.
• W3107031427 hasRelatedWork W1612463350 @default.
• W3107031427 hasRelatedWork W2168795152 @default.
• W3107031427 hasRelatedWork W2909744464 @default.
• W3107031427 hasRelatedWork W2948555672 @default.
• W3107031427 hasRelatedWork W3010629308 @default.
• W3107031427 hasRelatedWork W3032510434 @default.
• W3107031427 hasRelatedWork W3045965657 @default.
• W3107031427 hasRelatedWork W65620266 @default.
• W3107031427 isParatext "false" @default.
• W3107031427 isRetracted "false" @default.
• W3107031427 magId "3107031427" @default.
• W3107031427 workType "article" @default.