Chiemgau impact – new article

Pink quartz – a new, meteorite impact-related origin? Part 1: Observations and first hypothesis of formation PDF DOWNLOAD

Kord Ernstson* (2018)

Abstract. – Pink quartz, not to be confused with rose quartz, is an extremely rare color variety, which is completely transparent and is only known from a few occurrences worldwide. It is believed that the pink color is due to small amounts of aluminum and phosphorus that substitute silicon, and exposure of the quartz to natural gamma radiation. Sands with a dominating proportion of pink quartz excavated from the soil and extracted from a breccia layer in the crater strewn field of the Chiemgau meteorite impact suggest that normally colorless quartz sand was irradiated during the impact event and may possibly be found at other impact sites.

Key words: Pink and rose quartz, Chiemgau meteorite impact, neutron-gamma radiation

*Faculty of Philosophy I, University of Würzburg, Germany, kernstson@ernstson.de

Contribution to American Geophysical Union (AGU) Fall Meeting – Chiemgau Impact “Earthquake” Features

  • EP53B-1700: Meteorite Impact “Earthquake” Features (Rock Liquefaction, Surface Wave Deformations, Seismites) from Ground Penetrating Radar (GPR) and Geoelectric Complex Resistivity/Induced Polarization (IP) Measurements, Chiemgau (Alpine Foreland, Southeast Germany)
Authors
  • Kord Ernstson 
    • Faculty of Philosophy I, University of Würzburg
  • Jens Poßekel
    • Geophysik Poßekel Hornhof 14, 45479 Mülheim

CLICK the AGU Fall Meeting website with Abstract, Plain Language Summary and link for the DOWNLOAD of the POSTER.

Direct DOWNLOAD of the POSTER. Note that for better legibility the poster PDF can considerably be enlarged on the monitor.

cit. AGU Fall Meeting is the largest and preeminent Earth and space science meeting in the world.

Meteorite craters: impact approachable

Already in the early days of the exploration of the Chiemgau impact crater strewn field at the beginning of the new millennium, a perfectly semicircular structure was discovered during a flight, which seemed to be punctured into the bank of the Inn river near Marktl. Geological research on the ground and sampling quickly proved the impact nature of this well 50 m measuring crater, which was introduced as No. 24 into the crater list of the Chiemgau impact, which had been meticulously conducted by local history researchers. The semicircular structure was easily explained by the erosion of floods in the valley of the Inn river

Not recorded in the topographical maps and soon blocked with a large stable it fell into oblivion and was only recently opened to the eye in full splendor by the Digital Terrain Model DGM 1 (Fig. 1).

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Fig. 1. Aiching semi crater in the Inn river bank vis-à-vis the town of Marktl (UTM coordinates 338863, 5346952). Digital Terrain Model. Continue reading

The Chiemgau meteorite impact at the Lunar and Planetary Science Conference (LPSC) 2017: new contributions (abstract articles)

At the this year’s prestigious meeting of  the Lunar and Planetary Institute in The Woodlands, Texas, the following abstract articles that relate to the Chiemgau meteorite impact have been published:

Molnár M. Ventura K. Švanda P. Štaffen Z. Rappenglück M. A., Ernstson, K.:

Chrudim – Pardubice: Evidence for a Young Meteorite Impact Strewn Field in the Czech Republic –  Widespread finds of rocks and glasses with shock metamorphism and typical of meteorite impact suggest a Holocene impact event in the Czech Republic.

The article reports on a newfound very young meteorite impact event in the Czech Republic amazingly similar to the Chiemgau and Saarland (Nalbach) impact events in Germany. A possibly simultaneous impact having affected Central Europe over a distance of more than 650 km is discussed. Click the abstract article!

Procházka V. Trojek T.
XRF- and EMP- Investigation of Glass Coatings and Melted Domains of Pebbles from Craters in Chiemgau, Germany
Shock-induced melting mainly of biotite (?) produced typically porous veinlets. External glass coatings are rich in K and Cu (from plant biomass?), rarely in Ni.

The Czech authors report on investigations of shocked cobbles excavated from the Kaltenbach and #004 impact craters belonging to the Chiemgau meteorite impact strewn field. Click the abstract article!

 

New article: The Digital Terrain Model (DTM) and the craters of the Chiemgau meteorite impact strewn field

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The Digital Terrain Model (DTM) and the evaluation of known and the search for new craters in the Chiemgau meteorite impact strewn field [PDF DOWNLOAD]

Kord Ernstson* (2017)

Abstract. – For several known and a few newly proposed meteorite craters in the Chiemgau meteorite impact strewn field the LiDAR data of the Digital Terrain Model DTM have been processed to reveal various maps and cross sections based on a high-resolution mesh down to 1 m and contour interval down to 0.2 m. The data processing highlights particular crater features that remain hidden in fieldwork and on conventional topographic maps and even may debunk mistaken structures.

********************************************************************************************************* *Faculty of Philosophy I, University of Würzburg, Germany, kernstson@ernstson.de

Content 1 Introduction – 2 The Chiemgau meteorite impact event 3 Data processing 3.1 Terrain imagery 3.2 Horizontal gradient 3.3 Data filtering 3.4 Cross sections 4 Examples 4.1 Small craters in the DTM 4.2 Peripheral depressions around small craters 4.3 Medium-sized craters in the DTM 4.4 Mistaken structures 5 A possible large-sized crater in the DTM 6 Discussion and conclusions 7 References Appendix

The Chiemgau impact at the LPSC 2016

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At the this year’s internationally prestigious Lunar and Planetary Science Conference in the Woodlands, Texas, two contributions on the Chiemgau meteorite impact crater strewn field in Germany have been presented (after preceding LPSC contributions in the years 2011, 2012 and 2014).

Our Czech colleagues presented their results on rock magnetic properties of shocked rocks from smaller craters in the strewn field (click to download the full abstract article):

Evidence for superparamagnetic nanoparticles in limestones from Chiemgau crater field, SE Germany. V. Procházka1 , G. Kletetschka1 , 1 Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Charles Univ., Albertov 6, CZ-12843 Praha 2, Czech Republic (vprochaska@seznam.cz)

and the Chiemgau Impact Research Team (CIRT) reported on the meteorite impact-induced Lake Chiemsee tsunami (click to download the full abstract article):

EVIDENCE OF A METEORITE IMPACT-INDUCED TSUNAMI IN LAKE CHIEMSEE (SOUTHEAST GERMANY) STRENGTHENED. K. Ernstson, Faculty of Philosophy I, University of Würzburg, D-97074 Würzburg, Germany, kernstson@ernstson.de

T. Shumilova, S.N. Tkachev, S. Isaenko, S. Shevchuk, M.A. Rappenglück & V.A. Kazakov: new article in the journal CARBON

Only recently an article has been published in the reputable journal Carbon with our colleague Dr. Tatyana Shumilova, Russian Academy of Sciences, as first author and Dr. M.A, Rappenglück from our CIRT research group as one of the co-authors:

T. Shumilova, S.N. Tkachev, S. Isaenko, S. Shevchuk, M.A. Rappenglück & V.A. Kazakov (2016): A “diamond-like star” in the lab. Diamond-like glass. – Carbon 100(100):703-709. Continue reading

A cross-bedded diamictite: evidence of a big Lake Chiemsee tsunami in the Chiemgau meteorite impact event strengthened

A cross-bedded diamictite: evidence of a big Lake Chiemsee tsunami in the Chiemgau meteorite impact event strengthened

Kord Ernstson*

Abstract. – Gravel exploitation near Lake Chiemsee has exposed a quarry face exhibiting a larger diamictite deposit with significant cross bedding. The grain size of the material varies between silt and sharp-edged blocks up to the size of 1 m. In the majority, even the smaller fraction of limestone particles does not show any roundness. Frequently, limestone cobbles are covered with multiple sets of scratches and polish. For the cross-bedded diamictite exposed at the edge of a flat chain of hills a glacial deposit, e.g., as an end moraine, can be excluded. The multiple, small-scale cross-bedding units as well as the transport over short distance point to a close-by, short-term process of formation. It is interpreted as the result of a big Lake Chiemsee tsunami that was triggered in the Holocene Chiemgau impact event. The deposit also raises issues relevant to a Lake Chiemsee glacier.

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* Faculty of Philosophy I, University of Würzburg, Germany; kernstson@ernstson.de

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Continue reading

The Nalbach (Saarland, Germany) impact at the LPSC 2015

At the this year’s Lunar and Planetary Science Conference in the Woodlands, Texas, the abstract article entitled “Strong shock metamorphism and a crater: evidence of a Holocene meteorite impact event near Nalbach (Saarland, Germany)” by Nico Berger, Werner Müller and Kord Ernstson was presented. Here, we in particular point out that the peculiar findings in the Nalbach area are revealing remarkable similarities to impact features in the Holocene large Chiemgau impact strewn field in southeast Germany, and meanwhile the possibility that the Nalbach impact is a companion to the Chiemgau impact is seriously being discussed. Click on the image to open the full text!

LPSC 2015 abstract Nalbach impact