The Sariçiçek howardite fall in Turkey: Source crater of HED meteorites on Vesta and impact risk of Vestoids
Makaleler > Tam Makale · 2019
Yazarlar: OZAN ÜNSALAN, Peter Jenniskens, QingZhu YIN, Ersin Kaygısız, Jim Albers, David L Clark, Mikael Granvik, İSKENDER DEMİRKOL, İBRAHİM YASİN ERDOĞAN, AYDIN ŞÜKRÜ BENGÜ, Mehmet Emin Özel, Zahide Terzioğlu, Nayeob Gi, Peter Brown, EŞREF YALÇINKAYA, Tuğba Temel, Dinesh K Prabhu, Darrel K Robertson, Mark Boslough, Daniel R Ostrowski, Jamie Kimberley, Selman Er, Douglas J Rowland, Kathryn Bryson, Çisem ALTUNAYAR ÜNSALAN, Bogdan Ranguelov, Alexander Karamanov, Dragomir Tatchev, ÖZLEM KOCAHAN YILMAZ, Michael Oshtrakh, Alevtina Maksimova, Maxim Karabanalov, Kenneth L Verosub, Emily Levin, İBRAHİM UYSAL, Viktor Hoffmann, Takahiro Hiroi, Vishnu Reddy, GÜLCE ÖĞRÜÇ ILDIZ, OLCAY BÖLÜKBAŞI YALÇINKAYA, Michael Zolensky, Rupert Hochleitner, Melanie Kaliwoda, Sinan Öngen, Rui Fausto, Bernardo A Nougeira, Chukin Andrey, Daniela Karashanova, Vladimir Semionkin, MEHMET YEŞİLTAŞ, Timothy Glotch, AYBERK YILMAZ, John M Friedrich, Matthew E Sanborn, Magdalena Huyskens, Karen Ziegler, Curtis Williams, Maria Schonbachler, Kerstin Bauer, Matthias M M Meier, Colin Maden, Henner Busemann, Kees Welten, Marc W Caffee, Laubenstein Matthias, Qin Zhou, Qiu Li Li, Xian Hua Li, Yu Liu, Guoqiang Tang, Derek W G Sears, Hannah L McLain, Jason P Dworkin, Jamie E Elsila, Daniel P Glavin, Philippe Schmitt Koplin, Alexander Ruf, Lucille Le Corre, Nico Schmedemann
Meteoritics & Planetary Science, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2019, cilt 54, ss 953-1008
DOI: 10.1111/maps.13258
Özet
Abstract The Sariçiçek howardite meteorite shower consisting of 343 documented stones occurred on September 2, 2015 in Turkey and is the first documented howardite fall. Cosmogenic isotopes show that Sariçiçek experienced a complex cosmic‐ray exposure history, exposed during ~12–14 Ma in a regolith near the surface of a parent asteroid, and that an ~1 m sized meteoroid was launched by an impact 22 ± 2 Ma ago to Earth (as did one‐third of all HED meteorites). SIMS dating of zircon and baddeleyite yielded 4550.4 ± 2.5 Ma and 4553 ± 8.8 Ma crystallization ages for the basaltic magma clasts. The apatite U‐Pb age of 4525 ± 17 Ma, K‐Ar age of ~3.9 Ga, and the U,Th‐He ages of 1.8 ± 0.7 and 2.6 ± 0.3 Ga are interpreted to represent thermal metamorphic and impact‐related resetting ages, respectively. Petrographic; geochemical; and O‐, Cr‐, and Ti‐isotopic studies confirm that Sariçiçek belongs to the normal clan of HED meteorites. Petrographic observations and analysis of organic material indicate a small portion of carbonaceous chondrite material in the Sariçiçek regolith and organic contamination of the meteorite after a few days on soil. Video observations of the fall show an atmospheric entry at 17.3 ± 0.8 km s −1 from NW ; fragmentations at 37, 33, 31, and 27 km altitude; and provide a pre‐atmospheric orbit that is the first dynamical link between the normal HED meteorite clan and the inner Main Belt. Spectral data indicate the similarity of Sariçiçek with the Vesta asteroid family (V‐class) spectra, a group of asteroids stretching to delivery resonances, which includes (4) Vesta. Dynamical modeling of meteoroid delivery to Earth shows that the complete disruption of a ~1 km sized Vesta family asteroid or a ~10 km sized impact crater on Vesta is required to provide sufficient meteoroids ≤4 m in size to account for the influx of meteorites from this HED clan. The 16.7 km diameter Antionia impact crater on Vesta was formed on terrain of the same age as given by the 4 He retention age of Sariçiçek. Lunar scaling for crater production to crater counts of its ejecta blanket show it was formed ~22 Ma ago.