کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5745684 | 1412411 | 2017 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The Braunschweig meteorite â a recent L6 chondrite fall in Germany
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
On April 23rd 2013 at 2:07 a.m., a 1.3 kg meteorite fell in the Braunschweig suburb Melverode (52° 13â² 32.19â³ N. 10° 31â² 11.60â³ E). Its estimated velocity was 250 km/h and it formed an impact pit in the concrete fall site with a diameter of 7 cm and a depth of 3 cm. Radial dust striae are present around the impact pit. As a result of the impact, the meteorite disintegrated into several hundred fragments with masses up to 214 g. The meteorite is a typical L6 chondrite, moderately shocked (S4) - but with a remarkably high porosity (up to 20 vol%). The meteorite was ejected from its parent body as an object with a radius of about 10-15 cm (15-50 kg). The U,Th-He gas retention age of â¼550 Ma overlaps with the main impact event on the L-chondrite parent body â¼470 Ma ago that is recorded by many shocked L chondrites. The preferred cosmic-ray exposure age derived from production of radionuclides and noble gas isotopes is (6.0 ± 1.3) Ma.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemie der Erde - Volume 77, Issue 1, April 2017, Pages 207-224
Journal: Chemie der Erde - Volume 77, Issue 1, April 2017, Pages 207-224
نویسندگان
Rainer Bartoschewitz, Peter Appel, Jean-Alix Barrat, Addi Bischoff, Marc W. Caffee, Ian A. Franchi, Zelimir Gabelica, Richard C. Greenwood, Mourad Harir, Dennis Harries, Rupert Hochleitner, Jens Hopp, Matthias Laubenstein, Barbara Mader, Rosa Marques,