NEW LARGE LATE MESOZOIC ASTROBLEM OF WESTERN PACIFIC

According to the complex of the data ( geomorphological, structural - geological, geophisical, hydrochemical, the signs of an impact shock metamorphism in the rocks of Khabarovsk chaotic complex, different kinds of breccias ( from gries breccia to kllippen megabreccia and mixtites ), small iron meteorites and location of mass fossils remains of dinosaurs ) express suggest about the belonging of both Khehtsyr and Vandan arc ridges to the edge parts of Khabarovsk tremendous cosmogenic ring structure ( an astroblem «Dersu» ) - one of the largest in Russia and all of the world. The assume geographic coordinates of the centre of Khabarovsk astroblem are 48° 40' NL, 135° EL. Its central impact-explosive crater has a form of submeridian oval by size 100 x 90 km, under present depth near 1 km ! Alongside with central ring by diameter 100 km in present relief and hydrosystems are distinctly seen some segments of more large and high exterior ring ridge by diameter 280 - 300 km ! This ring structure are anologeus by scale to Popigai, Puchezh - Katunksky, Kara large impact craters in Russia, Acraman Neoproterozoic astroblem in South Australia, and Chicxulub far famed largest astroblem in North America which closely related with KTB global mass extinction such as the dinosaurs suffered total extinction all over the world, in Amur wide region of Russia, China, Japan and Korea in particular ( Blagoveschenskoe, Astashihinskoe, Gilichin, Kundur, West - Sahalinskoe ( Sinegorskoe, Russia ), Lun - Gu - Shan ( China ), Kitadany, Oyubary ( Japan ).and other “cemeteries”. Some dinosaur remains has evident signs of the violent disastrous event, including unprecendented high contents of iridium ( before 0,4 g/t !? ) and strontium ! Considering huge scale of the Khabarovsk ring structure ( Ø 280 - 300 km ! ), obviously that we deal with one of the the most tremendous Late Mesozoic astroblem, which formation could not have not only regional, but also global astrogeological and ecological consequences. One of the such global tectonic consequence could be formation at the same epoch in opposite "point" of Globe the insular Skotia arc - one of the the most whimsical and amazing structures of Pacific orogenic belt - in space between South Atlantics and Western Antarctics !