NWA 7397 Mars Meteorite, Martian Poikilitic Shergottite, .181g

A mass of approx. two kilograms was recovered from the Saharan Desert near Smara Morocco in June 2012. It was collected by local traders and samples were subsequently analyzed at UWS by Dr. Tony Irving. This meteorite is officially classified as a Martian achondrite, poikilitic shergottite type. It is composed of a tightly packed mass of crystals of pyroxene and olivine that has been highly shocked.

The specimen being offered here is an as-found fragment that is uncut and has some natural desert patina on it. It weighs .181g (181mg).

Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing the fragment shown. Your purchase will include an ID label and gemjar for safe storage.

From the Meteoritical Bulletin entry on NWA 7397 :

Purchased: 2012 Jun

Classification: Martian meteorite (Shergottite)

History: Found near Smara, Morocco in 2012 June.

Physical characteristics: A 2130 g, partially covered in fusion crust. Interior larger ovoid crystals in a finer grained matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Large oikocrysts (up to 1.5 cm across) of low-Ca pyroxene enclose multiple chadacrysts of olivine and Cr-rich chromite. Relatively equigranular domains between oikocrysts are composed of low-Ca and high-Ca pyroxene (showing very limited compositional zoning), maskleynite and olivine with accessory merrillite, Ti-chromite, pyrrhotite and ilmenite (with associated grains of baddeleyite up to 10 μm across). Olivine contains sparse melt inclusions composed of K-Na-Al-Si-rich glass surrounded by characteristic post-shock radial expansion microfractures.

Classification: Martian (shergottite, poikilitic).

Specimens: A total of 20 g of type material and one large polished thin section are on deposit at UWB

  • 1 available