Magnetic Properties of Tektite-like Impact Glasses from Zhamanshin Astrobleme, Kazakhstan

Starunov, V. A.; Kosterov, Andrei; Sergienko, E. S.; Yanson, Svetlana; Markov, G. P.; Харитонский, П. В.; Sakhatskii, Aleksandr S.; Lezova, I. E.; Shevchenko, E. V.

doi:10.1007/978-3-319-90437-5_30

Cited by 9 publications

(11 citation statements)

References 16 publications

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“…A frequent characteristic of these glasses is also large frequency dependence of susceptibility (Table 3), indicative of the abundance of superparamagnetic (SP) grains (grain size below about 20 nm). This abundance is confirmed by the hysteresis parameters and viscosity tests (e.g., Figures 5 and 6 in [9]); in the case of irghizite, liquid helium temperature remanence warming curves also indicated abundant SP grains [12]. Note that low fd% may either be due to the lack of SP particles or to a predominance of paramagnetic contribution in susceptibility.…”

Section: Overview Of Impact Glasses With Variable Ferromagnetic Contentmentioning

confidence: 56%

“…Table 3. Synthesis on magnetic properties of non paramagnetic impact glasses, after [9] complemented with data from [10][11][12]20,50,52,53] and this work. Sites are ordered by increasing mean susceptibility, with impact melt sheets at the end.…”

Section: Overview Of Impact Glasses With Variable Ferromagnetic Contentmentioning

confidence: 88%

“…The present synthesis will build on the two new Siberian impact glasses studied above, previous synthesis [9] as well as magnetic studies on Lappajärvi crater melt rocks [50], Lonar crater glass [51,52], of Mistastin crater melt rocks [53], of Jänisjärvi crater melt rocks [10], of Pantasma crater glass [11], complemented with M RS data from [20]. Data from [12] on irghizites will also be used to complement the database [9]. New magnetic data on glasses from Lonar, Ries, Kamil, Monturaqui, Lappajärvi, and Henbury craters have also been acquired for this study.…”

Section: Overview Of Impact Glasses With Variable Ferromagnetic Contentmentioning

confidence: 99%

“…The purpose of the present paper, besides a summary of early studies, is to present a synthesis review of the magnetic properties of impact glasses, updating [9] using recent publications [10][11][12] as well as new results. These include a specific effort on glasses from Siberia (site 7-10 in Figure 1) either associated to a known crater (Popigai and El'gygytgyn) or not (Urengoite and South-Ural glass; [13]).…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Properties and Redox State of Impact Glasses: A Review and New Case Studies from Siberia

et al. 2019

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High velocity impacts produce melts that solidify as ejected or in-situ glasses. We provide a review of their peculiar magnetic properties, as well as a new detailed study of four glasses from Siberia: El’gygytgyn, Popigai, urengoites, and South-Ural glass (on a total of 24 different craters or strewn-fields). Two types of behavior appear: 1) purely paramagnetic with ferromagnetic impurities at most of the order of 10 ppm; this corresponds to the five tektite strewn-fields (including the new one from Belize), urengoites, and Darwin glass. Oxidation state, based in particular on X-ray spectroscopy, is mostly restricted to Fe2+; 2) variable and up to strong ferromagnetic component, up to the 1 wt % range, mostly due to substituted magnetite often in superparamagnetic state. Accordingly, bulk oxidation state is intermediate between Fe2+ and Fe3+, although metallic iron, hematite, and pyrrhotite are sometimes encountered. Various applications of these magnetic properties are reviewed in the field of paleomagnetism, magnetic anomalies, recognition of glass origin, and formation processes.

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Section: Overview Of Impact Glasses With Variable Ferromagnetic Contentmentioning

confidence: 56%

Section: Overview Of Impact Glasses With Variable Ferromagnetic Contentmentioning

confidence: 88%

Section: Overview Of Impact Glasses With Variable Ferromagnetic Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic Properties and Redox State of Impact Glasses: A Review and New Case Studies from Siberia

et al. 2019

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“…8d) (Genge et al 2008). They have also been described in glasses at the El'gygytgyn (Pittarello and Koeberl 2013) and Zhamanshin (Kosterov et al 2019) impact craters.…”

Section: Discussionmentioning

confidence: 82%

Pantasma: Evidence for a Pleistocene circa 14 km diameter impact crater in Nicaragua

Rochette

Alac

Beck

et al. 2019

Meteorit & Planetary Scien

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The circa 14 km diameter Pantasma circular structure in Oligocene volcanic rocks in Nicaragua is here studied for the first time to understand its origin. Geomorphology, field mapping, and petrographic and geochemical investigations all are consistent with an impact origin for the Pantasma structure. Observations supporting an impact origin include outward‐dipping volcanic flows, the presence of former melt‐bearing polymict breccia, impact glass (with lechatelierite and low H2O, <300 ppm), and also a possible ejecta layer containing Paleozoic rocks which originated from hundreds of meters below the surface. Diagnostic evidence for impact is provided by detection in impact glass of the former presence of reidite in granular zircon as well as coesite, and extraterrestrial ε54Cr value in polymict breccia. Two 40Ar/39Ar plateau ages with a combined weighted mean age of 815 ± 11 ka (2 σ; P = 0.17) were obtained on impact glass. This age is consistent with geomorphological data and erosion modeling, which all suggest a rather young crater. Pantasma is only the fourth exposed crater >10 km found in the Americas south of N30 latitude, and provides further evidence that a significant number of impact craters may remain to be discovered in Central and South America.

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Analysis of Strong-Field Hysteresis in High Coercivity Magnetic Minerals

Kosterov

Sergienko

Iosifidi

et al. 2019

Springer Proceedings in Earth and Environmental Sciences

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Magnetic Properties of Tektite-like Impact Glasses from Zhamanshin Astrobleme, Kazakhstan

Cited by 9 publications

References 16 publications

Magnetic Properties and Redox State of Impact Glasses: A Review and New Case Studies from Siberia

Magnetic Properties and Redox State of Impact Glasses: A Review and New Case Studies from Siberia

Pantasma: Evidence for a Pleistocene circa 14 km diameter impact crater in Nicaragua

Analysis of Strong-Field Hysteresis in High Coercivity Magnetic Minerals

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