Sicilian serpentinite xenoliths containing abiotic organics with nanodiamond clusters as key model for prebiotic processes

作     者：Sergei K.Simakov Vittorio Scribano Nikolai N.Mel’Nik Germana Barone Sergei K.Simakov;Vittorio Scribano;Nikolai N.Mel'Nik;Germana Barone

作者机构：LLC“ADAMANT”Skolkovo ParticipantTikhoretsky 10/1-61St.Petersburg194064Russia Department of BiologicalGeological and Environmental SciencesUniversity of CataniaCorso Italia 55-I-95129 CataniaItaly Lebedev Physics InstituteRussian Academy of SciencesLeninsky Pr.53Moscow119991Russia 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2021年第12卷第1期

页      面：255-263页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

主　　题：Hydrothermal systems Nanocarbons Sulfides Fr-t synthesis Abiogenesis LUCA,Sicily Micro-Raman 

摘      要：Rock fragments from the deepest parts of a buried hydrothermal system belonging to the Mesozoic Tethys Ocean entered as xenoliths in a Miocenic diatreme,hence brought to the surface,in the Hyblean Plateau(Sicily).Some xenoliths consist of strongly serpentinized ultramafic rocks bearing blebs of abiotic organic matter,where clusters of amorphous carbon nanoparticles,including nanodiamonds,are *** an occurrence conjures up established hypotheses that diamond surfaces are suitable catalytic platforms stimulating the assemblage of complex bio-organic molecules relevant to the emergence of life on *** appearance of bio-organic molecules under primitive Earth conditions is one of the major unsolved questions on the origin of *** we report new micro-Raman spectra on blebs of abiotic organic matter from a selected *** bands were related to hydrogenated nanocrystalline diamonds,with size of nearly 1-1.6 nm,formed from organics at low pressures and *** particular,diamond surfaces can give rise to crystalline interfacial water layers that may have played a fundamental role in the early biosphere evolution as a good medium for rapidly transporting positive charges in the form of hydrated ***,proton gradients in alkaline hydrothermal vents along oceanic ridges are generally viewed as key pre-biotic *** general,serpentinites span the entire geological record,including prebiotic *** hydrous ultramafic rocks often display evidence of abiotic carbon species,both organic and inorganic,including nanodiamonds,being also capable to give rise to chemiosmotic processes and proton gradients necessary to the organisms,such as theLast Universal Common Ancestor(LUCA),in the prebiotic Earth.