what meant of low hydrogen to carbon
ratio
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Answer:
The Correct Answer is mentioned below
Explanation:
The look for hydrocarbon molecular biomarkers in Archean metasediments is of high significance for decoding the early evolution of life. Suitable standards are required to pick out promising objectives for similarly molecular biomarkers. Possible standards consist of the Hydrogen-to-Carbon (H/C) atomic ratio used as a proxy of the aliphatic content material of the kerogen matrix. However, H/C ratio values show off massive variant in Archean kerogens and their importance stays poorly understood. In this study, we hence look at the importance of the H/C ratios of Archean kerogens with the aid of using combining elemental analyses, Nanoscale Secondary Ion Mass Spectrometry (NanoSIMS), Rock-Eval pyrolysis and Raman spectroscopy. First, NanoSIMS investigations display the H/C ratio of kerogen may be compromised with the aid of using residual minerals. In addition, Rock-Eval pyrolysis underlines the reality that thermal cracking of Archean kerogens does now no longer simply launch hydrocarbon covalently related to the macromolecular community however additionally a complicated aggregate of natural swimming pools outstanding with the aid of using their thermal maturity. Therefore, the H/C ratio by myself can not be used to probe the protection of aliphatic compounds sure to kerogen because it could be biased with the aid of using the presence of (i) residual bitumen, as properly as (ii) refractory natural depend in secondary hydrothermal veins whose syngenecity is debatable. Rock-Eval pyrolysis then offers a beneficial and complementary technique to test the importance of H/C atomic ratio as a proxy for hydrocarbon protection in Archean kerogens.