The pumice volcanic samples could have possible connections to the evolution of life and give us insight about their bio-geochemical processes related. In this regard, the samples from the volcanic eruption from La Restinga (El Hierro, Spain) in 2011 have been mainly studied by means of Raman spectroscopy. The research also includes analysis of XRD, Scanning Electron Microscopy and Optical Microscopy to support the Raman analysis. The results show that the Raman methods and mineral analyses are in strong agreement with the results obtained from other authors and techniques. The internal white foamy core (WFC) of the studied pumice samples shows amorphous silica, Fe-oxides, Ti-oxides, quartz, certain sulfates, carbonates, zeolites and organics. On the other hand, the external part (dark crust – DC) of these samples mainly presents primary-sequence mineralogy combined with some secondary alteration minerals such as olivine, feldspar, pyroxene, amorphous silica, and Fe-oxide. Raman spectroscopy detected other minerals not yet reported on these samples like barite, celestine and lepidocrocite. Also, the different chemometric and calibration methods for Raman spectroscopy in elemental composition, mineral classification and structural characterization has been successfully applied.

From the astrobiological perspective, the research was also complemented with comparisons to other similar samples from terrestrial analogs. The main consideration was taking into account the proposed hypothesis regarding the potential behavior of the pumice as a substrate for the evolution of life. Furthermore, the detailed analysis from La Restinga eruption is coherent with the mineral phases and processes discussed from previous literature. The white internal part fulfills the conditions to work as an organic reservoir, confirmed by the detection of organic matter and selected minerals that could be used as energy sources for bacterial communities. The external layers of the samples work as a shielding layer to protect the organics from decay in extreme conditions. Finally, here we have demonstrated that the characteristics and advantages of Raman spectroscopy could help to assess and understand the possible biogenicity and alteration processes of any geological sample to be found on Mars.

浮石火山岩样品可能与生命演化有关，并为我们提供了有关其生物地球化学过程的见解。在这方面，主要通过拉曼光谱法研究了2011年从La Restinga（西班牙埃耶罗，西班牙）喷发的火山喷出的样品。该研究还包括XRD分析，扫描电子显微镜和光学显微镜以支持拉曼分析。结果表明，拉曼方法和矿物分析与其他作者和技术获得的结果非常吻合。研究的浮石样品的内部白色泡沫核（WFC）显示出无定形二氧化硅，氧化铁，氧化钛，石英，某些硫酸盐，碳酸盐，沸石和有机物。另一方面，这些样品的外部（暗壳-DC）主要表现为一次层序矿物学，结合了一些次生蚀变矿物，例如橄榄石，长石，辉石，无定形二氧化硅和氧化铁。拉曼光谱法检测到这些样品上尚未报告的其他矿物，例如重晶石，天青石和纤铁矿。同样，在元素组成，矿物分类和结构表征方面已成功应用了拉曼光谱的不同化学计量和校准方法。

从天体生物学的角度来看，该研究还与来自陆地类似物的其他类似样品进行了比较。主要考虑因素是考虑到提出的关于浮石作为生命进化基质的潜在行为的假设。此外，La Restinga喷发的详细分析与先前文献中讨论的矿物相和过程是一致的。内部白色部分满足了作为有机储集层的条件，这通过检测有机物和选定的可用作细菌群落能源的矿物质得以证实。样品的外层充当屏蔽层，以保护有机物在极端条件下不会腐烂。最后，