Экспедиция на метеоритный кратер Жаманшин, Казахстан. Экспедиция 2013 года. Импактная порода - Жаманшинит.
Expedition in a meteorite crater Zhamanshin.

An expedition to Zhamanshin meteorite crater, June, 2013. Irgiz district, Aktobe region, Republic of Kazakhstan. The purpose of the expedition to the crater was searching for impact melt rocks, formed during meteorite impact, as no meteorite itself was left after the impact. According to a local belief, "Zhamanshin" is translated as a "death trap", or, as the locals told us, "the valley of death." The coordinates of Zhamanshin crater are as follows: 48°24'00"N 60°58'00"E. The crater of Zhamanshin was formed as a result of impact of a meteorite of about three hundred meters. The crater diameter is 14 km, the depth - 800 meters.


It is difficult to assume unequivocally the age of the crater; according to various sources, it ranges from one million years to 50 million years. The impact structure itself was formed at a temperature of about 1700 degrees Celsius. It looks like solidified layers of brown and light brown volcanic lava.


Finding of bubbled quartz or lechatelierite - SiO2 - was of particular interest. Lechatelierite is usually found in places of meteorite impact, places with volcanic activity and places with high thunderstorm activity. Tektites, air-borne impact structures, can also be found near the crater. This refers Zhamanshin crater to the category of rare ones, as in most cases either tektites or impactites are found in impact craters.

Meteoritical Bulletin Database - meteorite crater Zhamanshin.