The Allende meteorite gives us a window into the chaotic start of the Solar System. changing environments so extreme ... that is the portrait of the origins that we offer a continuous meteorite are fallin 'on Earth , all authentic fossils that have barely changed in thousands of millions of years. Or would it be better to say that is the information you provide something that we find inside, little known areas as CAIs (Calcium-rich inclusions in and Aluminum ) and now new technologies are beginning to figure out what to say.
And one of the mysteries related to the meteorites that most astronomers have puzzled over the last century is its apparent contradiction with the presence of minerals that can only be formed in cold environments and at the same time with other modified in hot ... like CAIs , just an inch spheres that were formed when heated to the melting point and then mixed with cold interstellar dust. Far from being "quietly" in a relatively stable environment the first groups of matter in the protoplanetary disk from which the planets were born, including Earth, lived a youth appear chaotic.
Taking advantage of rapid technological advances, researchers at the University of California at Berkeley, led by Justin I. Simon, have used a relatively recent instrument, the NanoSIMS (secondary ion mass spectrometer) to study the internal structure of a CAI extracted from the meteorite Allende , which is considered the most carbonaceous chondrite found in Earth. This object rushed Mexico in 1969, split into hundreds of fragments left on the land of Chihuahua , and it is estimated that the original body could be the size of a car.
The goal, once the CAI was cut into thin "slices", was to record the abundance of isotopes of oxygen , namely Oxygen-16 (16O) and 17 (17O), as their presence is directly related to the distance from the Sun at the time of its formation ... more 16O nearer the Sun and predominance of 17O if it was in remote regions. What was the outcome? The
response analysis is a real "guide" the adventures and misadventures of this CAI: A concentration of 17O on the rise (and the opposite in the case of 160) as one moves away from its core indicates that formed near the Sol to go away ... then to return later, because the biggest surprise of this study was to reveal the high concentration of 16O in its outer shell . Simon
a summary of how we imagine his long adventure, "If one were this point, would have been born close to the sun early, then he probably would have moved out to an area of \u200b\u200bplanet formation would then returned to the inner solar system and might have left the disc plane. Of course, one would have ended up as part of a meteorite, perhaps in the asteroid belt, before breaking and falling on the Earth .
estimated with respect to the actual planets (and who were still born at the time) this CAI was formed at some point in the orbit of Mercury , traveled to the space currently occupied by the asteroid belt between Mars and Jupiter, and then went back to Sun
" The CAI is one of the components most interesting of meteorites. Recorded the history of the solar system before planets form and were the first solids condensed from the gaseous nebula surrounding our early Sun "says Simon ... and certainly, like the rings we see in the trunk a tree, this study shows that an authentic record of a primal time still holds many mysteries to solve. His "pages" saved many of the keys we need to better understand what happened so long ago, when an extremely young Sol had just begun to shine and in the gas and dust swirling around him were beginning to take shape what would become their 'future family planet.
The February 8, 1969 the sky over Chihuahua shuddered with the arrival of a large meteorite, which fragment to enter the atmosphere and whose pieces are spread over a wide area, most of which were recovered for study. Today are considered the best source of information directly from the remote past of our world and solar system. Allende meteorite
Solar System's Story Revealed in a Pea
The story of a grain of dust than 4,500 million years
Reading the life history of a 4.5 billion-year-old meteorite
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