FORMATION OF VOIDS TEXTURES IN METEORITES.
Y. Miura1, 2, 3 and G.Iancu2. 1Yamaguchi University, Yamaguchi,
Japan. yasmiura50@gmail.com. 2Al.I.Cuza National University,Iasi. Romania. 3Caltech-JPL, USA.
Introduction: Meteorites from Asteroids are considered tobe mixtures of vapor-liquid-solid. (VLS in this paper) on solidrich rocks. Different from planet Earth with three VLS systems
covered on solid system, Asteroids have few air and liquid systems on solid rocks. The main purpose of the paper is to present
basic outline of meteorites with micro-mixtures of the VLSstates.
Mixtures of three states in meteorites: The three phases ofthe VLS states are found in any meteorites as impacted micromixtures (without any air and water systems around the rocks) as
follows [1-5]:
Mtotal = Mv + ML + MS
(1)
In the equation (1), Mtotal , Mv , ML and MS mean total materials, vapor, liquid and solid materials, respectively.
Planets with atmosphere and/or ocean water system: Any
Earth-type planets of the Solar System are considered to be any
micro- and macro-mixtures of the three VLS states as follows:
1) Planet without macro systems of air and water (i.e.
Mercury , also the Moon) is just increased from large Asteroids
with the three states Mtotal as shown in the equation (1).
2) Planet with macro air system and without water system(i.e. Venus and Mars) is considered to be evaporated from theinterior to form macro-air (CO2-rich) system, shown as solid state
Mtotal with two fluids and solid states ML and MS.
3) Planet Earth with major two air and water systems iscomplicated formation to form water system (such as giant impact to be evaporated from the older interior), shown as solidstate Mtotal mainly with solid state MS in the equation (1).
Voids textures in meteorite: Meteorites from any Asteroids
show relatively voids-bearing texture, because they are impacted
mixtures by formation processes (without air and liquid systems
around the Asteroids) [4, 5].
Evidences of voids-bearing textures: The Antarctic meteorites (Yamato86032 etc.) and Nio (Yamaguchi) chondrite reveal
the following textures [1-5]:
1) Various sizes (100nm to 0.1mm) of voids are connected
to meteorite surfaces of the fusion-crust to the interior deeply.
2) There are some voids-bearing textures in deeper interiorof the meteorites as basic impacted textures.
3) Shapes of macro-voids in the fusion-crust are almost circular, though micro-voids reveal rounded to irregular shapes withclear-rounded to rim-deposited textures from melted inclusions.
4) The micro-voids textures with irregular arrangements inmeteorites are considered to be formed in meteoritic interiorremnants of meteoritic interior solidified process during impact
process of meteorite formation.
5) The present micro-voids texture formation can be applied
to any Antarctic meteorites and Asteroids samples.
Summary: Voids-bearing textures are remnants of impact
process with three VLS states kept in the interior of meteorites.
References: [1] Miura, Y. 2011. Solid 2011, #9013. [2]Miura Y. 2012. NTMS-2012 (Houston), #3100. [3] Miura
Y. 2012. Met. Soc. Meet 75th (Cairns), #5115. [4] Miura
Y. 2012. SBAG Science, #9013. [5] Miura Y. 2013. 44thLunar and Planetary Science Conference. #1654, #3098.