de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Noble gases in enstatite chondrites II: The trapped component

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons101174

Patzer,  A.
Cosmochemistry, Max Planck Institute for Chemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons101260

Schultz,  L.
Cosmochemistry, Max Planck Institute for Chemistry, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Patzer, A., & Schultz, L. (2002). Noble gases in enstatite chondrites II: The trapped component. Meteoritics and Planetary Science, 37(4), 601-612.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-9124-E
Zusammenfassung
The trapped noble gas record of 57 enstatite chondrites (E chondrites) has been investigated. Basically, two different gas patterns have been identified dependent on the petrologic type. All E chondrites of type 4 to 6 show a mixture of trapped common chondritic rare gases (Q) and a subsolar component (range of elemental ratios for E4-6 chondrites: Ar-36/Xe-132 = 582 +/- 270 and Ar-36/Kr-84 = 242 +/- 88). E3 chondrites usually contain Q gases, but also a composition with lower Ar- 36/Xe-132 and Ar-36/Kr-84 ratios, which we call sub-Q (Ar- 36/Xe-132 = 37.0 +/- 18.0 and Ar-36/Kr-84 = 41.7 +/- 18.1). The presence of either the subsolar or the sub-Q signature in particular petrologic types cannot be readily explained by parent body metamorphism as postulated for ordinary chondrites. We therefore present a different model that can explain the bimodal distribution and composition of trapped heavy noble gases in E chondrites. Trapped solar noble gases have been observed only in some E3 chondrites. About 30% of each group, EH3 and EL3 chondrites, amounting to 9% of all analyzed E chondrites show the solar signature. Notably, only one of those meteorites has been explicitly described as a regolith breccia.