Diamond and silicon carbide in impact melt rock from the Ries impact crater

Nature ◽  
1995 ◽  
Vol 378 (6552) ◽  
pp. 41-44 ◽  
Author(s):  
R. M. Hough ◽  
I. Gilmour ◽  
C. T. Pillinger ◽  
J. W. Arden ◽  
K. W. R. Gilkess ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Impact Crater ◽  
Impact Melt ◽  
Ries Impact Crater

scholarly journals Petrophysical properties, mechanical behaviour, and failure modes of impact melt-bearing breccia (suevite) from the Ries impact crater (Germany)

Icarus ◽  
2020 ◽  
Vol 349 ◽  
pp. 113873 ◽  
Author(s):  
Michael J. Heap ◽  
H. Albert Gilg ◽  
Paul K. Byrne ◽  
Fabian B. Wadsworth ◽  
Thierry Reuschlé
Keyword(s):  
Mechanical Behaviour ◽  
Impact Crater ◽  
Failure Modes ◽  
Petrophysical Properties ◽  
Impact Melt ◽  
Ries Impact Crater

scholarly journals Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Qinghong Zeng ◽  
Shengbo Chen ◽  
Yuanzhi Zhang ◽  
Yongling Mu ◽  
Rui Dai ◽  
...  
Keyword(s):  
Impact Crater ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Chemical Properties ◽  
Landing Site ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Chemical Compositions ◽  
Impact Melt ◽  
And Chemical Properties

AbstractWe report on the mineralogical and chemical properties of materials investigated by the lunar rover Yutu-2, which landed on the Von Kármán crater in the pre-Nectarian South Pole–Aitken (SPA) basin. Yutu-2 carried several scientific payloads, including the Visible and Near-infrared Imaging Spectrometer (VNIS), which is used for mineral identification, offering insights into lunar evolution. We used 86 valid VNIS data for 21 lunar days, with mineral abundance obtained using the Hapke radiative transfer model and sparse unmixing algorithm and chemical compositions empirically estimated. The mineralogical properties of the materials at the Chang’E-4 (CE-4) site referred to as norite/gabbro, based on findings of mineral abundance, indicate that they may be SPA impact melt components excavated by a surrounding impact crater. We find that CE-4 materials are dominated by plagioclase and pyroxene and feature little olivine, with 50 of 86 observations showing higher LCP than HCP in pyroxene. In view of the effects of space weathering, olivine content may be underestimated, with FeO and TiO2 content estimated using the maturity-corrected method. Estimates of chemical content are 7.42–18.82 wt% FeO and 1.48–2.1 wt% TiO2, with a low-medium Mg number (Mg # ~ 55). Olivine-rich materials are not present at the CE-4 landing site, based on the low-medium Mg #. Multi-origin materials at the CE-4 landing site were analyzed with regard to concentrations of FeO and TiO2 content, supporting our conclusion that the materials at CE-4 do not have a single source but rather are likely a mixture of SPA impact melt components excavated by surrounding impact crater and volcanic product ejecta.

The Projectile of the Lappajärvi Impact Crater

1980 ◽  
Vol 35 (2) ◽  
pp. 197-203 ◽  
Author(s):  
Elke Göbel ◽  
Uwe Reimold ◽  
Hildegard Baddenhausen ◽  
Herbert Palme
Keyword(s):  
Impact Crater ◽  
Carbonaceous Chondrite ◽  
Volatile Elements ◽  
Rich Phase ◽  
Impact Melt ◽  
Siderophile Elements ◽  
High Concentrations ◽  
Impact Melts

Abstract Two impact melt samples from the Lappajärvi crater (Scandinavia) are highly enriched in siderophile elements, such as Ir, Re, and Os. This indicates the presence of a meteoritic component. The simultaneous enrichments of Ni, Co, Cr, and Se suggest a chondritic projectile. Because of the relatively large indigenous contributions to Ni, Co, and Cr, it is not possible to distinguish between a normal and a carbonaceous chondrite. The high concentrations of relatively volatile elements could point towards a volatile-rich projectile.The two melt samples have high Re/Ir ratios compared to chondritic ratios. Enrichment of Re relative to Ir is very unusual in terrestrial impact melts. Loss of Re, because of volatilisation under oxidizing conditions or by weathering is frequently observed.The high Re/Ir ratios and the high abundances of relatively volatile elements either indicate the presence of a volatile rich phase or they characterize a type of meteorite, which has not been sampled. Some lunar highland rocks have a pattern of meteoritic elements rather similar to that observed for the Lappajärvi meteorite.The Lappajärvi crater is, after Rocheehouart, the second European crater where a significant amount of meteoritic component has been found.A melt sample from the Lake St. Martin crater (Manitoba), did not show any enrichment in meteoritic elements.

Planar Deformation Features in Quartz from the Ries Impact Crater: Advanced by Micro-Raman Spectroscopy

2011 ◽  
Vol 44 (7-8) ◽  
pp. 469-473 ◽  
Author(s):  
Arnold Gucsik ◽  
Tasuku Okumura ◽  
Masahiro Kayama ◽  
Hirotsugu Nishido ◽  
Kiyotaka Ninagawa
Keyword(s):  
Raman Spectroscopy ◽  
Impact Crater ◽  
Planar Deformation ◽  
Micro Raman Spectroscopy ◽  
Deformation Features ◽  
Planar Deformation Features ◽  
Ries Impact Crater

Stable isotope composition of impact glasses from the Nördlinger Ries impact crater, Germany

2001 ◽  
Vol 65 (8) ◽  
pp. 1325-1336 ◽  
Author(s):  
Torsten W Vennemann ◽  
Andreas Morlok ◽  
Wolf von Engelhardt ◽  
Kurt Kyser
Keyword(s):  
Stable Isotope ◽  
Impact Crater ◽  
Isotope Composition ◽  
Stable Isotope Composition ◽  
Ries Impact Crater

Chemical and ecological evolution of the Miocene Ries impact crater lake, Germany: A reinterpretation based on the Enkingen (SUBO 18) drill core

2013 ◽  
Vol 125 (7-8) ◽  
pp. 1125-1145 ◽  
Author(s):  
G. Arp ◽  
M. Blumenberg ◽  
B. T. Hansen ◽  
D. Jung ◽  
C. Kolepka ◽  
...  
Keyword(s):  
Impact Crater ◽  
Crater Lake ◽  
Drill Core ◽  
Ecological Evolution ◽  
Ries Impact Crater
Sign in / Sign up

Export Citation Format

Share Document