(the silicate mineral grains found in meteorites) are clearly visible.
Chondrites - the most common type of meteorites found on Earth - are made up of chondrules
, which are small, spheroidal particles.
Lightning flashes in the huge cloud of primeval dust and gas from which the planets in the solar system condensed may have caused formation of the puzzling objects known as chondrules
TEHRAN (FNA)- Sulfide chondrules
, a new type of building blocks discovered in meteorites left over from the solar system's infancy, provide evidence for a previously unknown region in the protoplanetary disk that gave rise to the planets including Earth.
This will allow us to: 1) define the mechanism and timescale for the collapse of the protosolar molecular cloud and emergence of the protoplanetary disk, 2) constrain the source and locale of chondrule
-forming event(s) as well as the nature of the mechanism(s) required to transport chondrules
to the accretion regions of chondrites, and 3) provide robust estimates of the timing and mechanism of asteroidal differentiation.
The other colored bits are themselves probably pieces of other broken chondrules
Using improved methods of analysis of uranium and lead isotopes, the current study of primitive meteorites has enabled researchers to date the formation of two very different types of materials, so-called calcium-aluminum-rich inclusions (or CAI's for short) and chondrules
, found within the same meteorite.
are thought to predate the formation of the planets.
Clasts comprise the same mineral phases as the matrix, as well as chondrules
and larger (50-100 micron) single mineral grains (mainly olivine and orthopyroxene).
They are built mostly of small stony grains, called chondrules
, barely a millimeter in diameter.
The main scientific strategy of this proposal is based on reinvestigating with the best precision ever achieved the starting parameters of the 146Sm-142Nd systematic using the oldest objects of the solar system: Ca-Al inclusions and chondrules
The 'carbonaceous chondrite meteorite' was originally formed in the early solar system when microscopic dust particles gathered around larger grain particles called chondrules
, which were around one mm in size.