Re: [meteorite-list] Composition of Tektites

Hi, to give you a fast answer, the vast majority of tectites and impact glasses from Earth are like average upper crust lithologies, i.e. granitic rocks. The exceptions are lonar glasses (basaltic) and libyan desert glasses (silica) because of the particular composition of the melted target

Re: [meteorite-list] Tektite Information

Hi, this book is interesting, but many works have been made on tektites since 1976... (See for example all the Christian Koeberl's papers...) By the way, a very interesting link for people interested by impact processes is the book entitled traces of catastrophe that can be downloaded on the lpi

Re: [meteorite-list] Any irons/stony-irons linked to known stones?

Hi, at present, excepted winonaites with IAB irons, no known group of iron is connected to a group of achondrite. The situation is slightly different for mesosiderites and pallasites. The silicate portion of the mesosiderites is certainly linked to HEDs but the metal and the silicates are not

Re: [meteorite-list] Fw: New Issue: Granite-like rocks on Vesta

Hello, HED meteorites contain often a silica phase... Anyway, the crust of Vesta is commonly thought to be made of basalts (eucrites) and mafic or ultramafic cumulates (diogenites and cumulate eucrites). We have studied a few howardites and found impact glass beads. Some of these glasses are

Re: [meteorite-list] Family Claims Meteorite Fell In TheirCourtyard inIndia

Martin, your answer to Chris is just perfect... cheers Jean-Alix Barrat Hi Chris, Some figures: The museum of the Indian Geological Survey opened in Calcutta in 1856, in 1867 the meteorite collection there already had 247 specimens. London achieved that number of specimens (250

Re: [meteorite-list] Family Claims Meteorite Fell InTheirCourtyardinIndia

! But they are not scientists!!! To answer to your question, you can be sure that you can find more than one meteoricist in India!!! Jean-Alix Barrat Professor of Geochemistry at UBO-IUEM Vice-President of the CNFG (French National committee of Geology) Selon Chris Peterson [EMAIL PROTECTED]: Hi Martin

Re: [meteorite-list] Vesta HED's

at present. The fact that Vesta exhibits diogenites AND eucrites is a strong argument for a link between HED and Vesta. Jean-Alix Barrat Selon Benjamin P. Sun bpsun2...@gmail.com: Yes, but aren't the relatively few non-Vesta eucrites classified as ungrouped achondrites or anomalous eucrites

Re: [meteorite-list] Diogenite Nomenclature

Hi, the problem of the taxonomy of diogenites has been discussed recently in this paper: Andrew W. BECK and Harry Y. McSWEEN Jr (2010),Diogenites as polymict breccias composed of orthopyroxenite and harzburgite, Meteoritics Planetary Science, Volume 45, Issue 5, May 2010, Pages: 850–872, DOI:

Re: [meteorite-list] Accepted Meteorite Classification

Hi Mendy, it is an excellent reference. Recently, Paul Warren has published an interesting paper in EPSL, and he proposes revisions based on stable isotopes, which are justified. Anyway, the MESSII paper is still an up to date reference. cheers Jean-Alix Selon Mendy Ouzillou

Re: [meteorite-list] Diogenite Nomenclature

Hi Mike, No. The Olivine diogenites do not display systematically a texture different to that of regular diogenites. Tatahouine is not a correct example because it is unbrecciated and have very large crystals. The largest I have seen is 5 cm in length! Tatahouine is unique. NWA 5480 is

Re: [meteorite-list] Pronunciation of Orgueil

Sorry, but it is not correct !!! By the way,the meaning of the word orgueil is pride ! cheers Jean-Alix Barrat Selon Rob Matson mojave_meteori...@cox.net: Now do you want to try Orgueil ? ;-) That one is MUCH harder for the non-French to pronounce. Again, accent is on the beginning

Re: [meteorite-list] Pronunciation of Orgueil

Jeff Frossman brings the best solution. I have just tried the link using the Claire's voice (french of course) and the result is just perfect. Jean-Alix Selon Jeff Grossman jgross...@usgs.gov: Try http://www.acapela-group.com/text-to-speech-interactive-demo.html and select one of the French

Re: [meteorite-list] Fake Moldavites

Just for the fun, I can analyze the fakes, for major and trace elements. Jean-Alix Barrat Professor of Geochemistry UBO-IUEM CNRS, UMR 6538 (Domaines Océaniques) Place Nicolas Copernic 29280 Plouzané Cedex Zelimir Gabelica a écrit : Mike, Bernd, Andi, Michael, all, Could be interesting

Re: [meteorite-list] Diamonds in Almahata Sitta

The paper on Almahata Sitta diamonds is in open access. You can read it following this link: https://www.nature.com/articles/s41467-018-03808-6 Cheers, Jean-Alix Le 18/04/2018 à 12:29, Mike Tettenborn via Meteorite-list a écrit : List, Following is a short article regarding possible

Re: [meteorite-list] Meteoritical Bulletin Main Mass photos

Hello, it could be a good idea to include some pictures. However, it could be a false good idea. Most meteorites are not spectacular and will not be studied by anyone other than those who make the initial description. Who is interested in ordinary rusty chondrites? What outstanding science

Re: [meteorite-list] Distinguishing volcanic from impact glasses

To differentiate between volcanic glasses and impact glasses is a classical problem that has been addressed by those who have studied glass beads found in lunar soils. For the latter, the homogeneity of chemical compositions within a bead is a very good criterion (except for volatiles). The