RT Journal Article
T1 The Ardón L6 ordinary chondrite : a long-hidden Spanish meteorite fall
A1 Trigo Rodríguez, Josep María
A1 Llorca, Jordi
A1 Weyrauch, Mona
A1 Bischoff, Addi
A1 Moyano Cambero, Carles E.
A1 Keil, Klaus
A1 Laubenstein, Matthias
A1 Pack, Andreas
A1 Madiedo Gil, José María
A1 Alonso Azcárate, Jacinto
A1 Riebe, My
A1 Wieler, Rainer
A1 Ott, Uli
A1 Tapia, Mar
A1 Mestres, Narcís
AB We report and describe an L6 ordinary chondrite fall that occurred in Ardón, León province, Spain (longitude 5.5605°W, latitude 42.4364°N) on July 9th, 1931. The 5.5 g single stone was kept hidden for 83 yr by Rosa Gonzólez Perez, at the time an 11 yr old who had observed the fall and had recovered the meteorite. According to various newspaper reports, the event was widely observed in Northern Spain. Ardón is a very well-preserved, fresh, strongly metamorphosed (petrologic type 6), and weakly shocked (S3) ordinary chondrite with well-equilibrated and recrystallized minerals. The mineral compositions (olivine Fa23.v±o.3, low-Ca pyroxene Fs2o.4±o.2WoL5±o.2, plagioclase An10.3i0.5Ab84.3iL2), magnetic susceptibility (log v = 4.95 i 0.05 x 10-9 m3 kg-1), bulk density (3.49 i 0.05 g cm-3), grain density (3.58 i 0.05 g cm-3), and porosity (2.5 vol%) are typical for L6 chondrites. Short-lived radionuclides confirm that the meteorite constitutes a recent fall. The 21Ne and 38Ar cosmic ray exposure ages are both about 20-30 Ma, similar to values for many other L chondrites. The cosmogenic 22Ne/21Ne ratio indicates that preatmospheric Ardón was a relatively large body. The fact that the meteorite was hidden in private hands for 83 yr makes one wonder if other meteorite falls may have experienced the same fate, thus possibly explaining the anomalously low number of falls reported in continental Spain in the 20th century.
PB Meteoritical Society
SN 1086-9379
SN 1945-5100 (electrónico)
YR 2014
FD 2014
LK http://hdl.handle.net/10272/8767
UL http://hdl.handle.net/10272/8767
LA eng
NO Trigo Rodríguez, J.M., Llorca, J.,  Weyrauch, M., Bischoff, A., Moyano Cambero, C.E., Keil, K., Laubenstein, M., Pack, A., Madiedo Gil, J.M., Alonso Azcárate, J., Riebe, M., Wieler, R., Ott, U.,  Tapia, M., Mestres, N.: "The Ardón L6 ordinary chondrite : a long-hidden Spanish meteorite fall". Meteoritics and Planetary Science. Vol. 49, N. 8, págs. 1475–1484 (2014). ISSN 1086-9379
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026