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A model is described with which abiotic RNA -the admitted key for life appearance on earth- can be synthetized near some deep-sea volcano. This is considered with asymmetric chiral amino-acids and nucleobases being produced in an UREY-MILLER discharge with circular polarized light in the early earth atmosphere and which are selectively adsorbed on SWCNT formed during ultramafic volcano extrusion. All this in agreement with Precambrian carbonated rocks containing also graphenic particles and marks of early life and considering recent carbon phase transition theory and early earth conditions which can be deducted from meteorite and chondrite analysis and some revisited formation mechanisms. Those are for instance concerning the properties of diamond formed during some specific volcano extrusion and the discovered graphenic carbon residues in some carbon chondrites.  Origin of last ones is proposed by condensation and accretion in the solar nebula of star dust and relics of Supernova destructed water and carbon rich red dwarf planets which have undergone some thermal differentiation. Further on, we show how earth atmosphere lightning can produce circular polarized light able to produce significant enantiomeric dissymmetry. Selective adsorption of life molecule enantiomers on CNT is suggested to cause L-type enrichment with another mechanism we newly describe basing on recently discovered selective buoyancy effect in water of CNT/life-molecule which can separate L- and D- enantiomers. RNA separation from a CNT template appears possible by its etching in pressurized sulfuric ~200°C hot water. Analysis of the sequences and effects concerning the possibility of life molecules to be assembled with exclusive L-chirality and reduced probability of destruction suggest that extraterrestrial import will be likely excluded. We discuss then how similar processes can exist elsewhere in the universe and which possibly continue to exist near some deep-sea volcanoes with femto-plankton synthesis.