March 3, 2017

Earliest life forms?

Filed under: Letters from Ionia — Tags: , — zankaon @ 3:27 pm

Recent reports suggest microbial life in ancient hydrothermal vents in rocks ~3.77- 4.28 Byrs ago – Nuvvuagittuq Supracrustal Belt (NSB). However is there the possibility of a later date infusion of fluid rock material?

For example, for Gunflint trail formation and vicinity, one has ancient shield rocks, but with later volcanic intrusion rocks, associates with the Mid-continental rift ~1 Byrs ago.

Just one billion years is an enormous geological time span, wherein almost any thing can occur. Animalia (such as sponges) might have arisen approximately 1 billion years ago; an almost inconceivable span of biological evolutionary time. 

So nature has had an enormous amount of time to try all possibilities. That is, a temporal series can be transformed into an ensemble of all spatial realized states. But is this sufficient? There also must be preservation, stability, allowing for an accumulation of mass, in regards to structural or functional elements; such as stabi!ity of amide bond for between amino acids (condensation dehydration polymer formation)?

For example, adsorption to a surface, or confined by gels, and/or a dryer environment. Perhaps nacent pre-biotic chemistry beneath a biofilm of a marine surface? Thus co-evolution of stabilizing preservation conditions, factors etc. would seem to be of equal importance.

Astrobiology Science Conference 2017 (LPI Contrib. No. 1965),

PREBIOTIC CHEMISTRY IN CHEMICAL GARDEN STRUCTURES AT HYDROTHERMAL VENTS:  THE IMPORTANCE OF GELS AND GRADIENTS.  L. M. Barge1 , O. Steinbock, J. H. E. Cartwright, NASA , Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena CA 91109, USA (; Florida State University, Tallahassee, FL 32306-4390, USA; Instituto Andaluz de  Ciencias de la Tierra, CSIC−Universidad de Granada, Granada, Spain

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