PTAL multi-spectral database of planetary terrestrial analogues: Raman data overview

TL;DR

This paper presents an overview of a comprehensive multi-spectral database of terrestrial analogues, focusing on Raman spectroscopy data, to support Mars exploration and planetary geology studies.

Contribution

It provides the first extensive collection of Raman spectra for terrestrial analogues, accessible via a web platform, aiding planetary exploration research.

Findings

Confirmed Raman spectroscopy's effectiveness in mineral detection

Collected over 4500 Raman spectra from terrestrial analogues

Insights into Mars-like geological processes from simulated data

Abstract

The multi analytical study of terrestrial analogues is a useful strategy to deepen the knowledge about the geological and environmental evolution of Mars and other extraterrestrial bodies. In spite of the increasing importance that LIBS, NIR and Raman techniques are acquiring in the field of space exploration, there is a lack web-based platform providing free access to a wide multi-spectral database of terrestrial analogue materials. The Planetary Terrestrial Analogue Library (PTAL) project aims at responding to this critical need by developing and providing free web accessibility to LIBS, NIR and Raman data from more than 94 terrestrial analogues selected according to their congruence with Martian geological contexts. In this framework, the present manuscript provides the scientific community with a complete overview of the over 4500 Raman spectra collected to feed the PTAL database. Raman data, obtained through the complementary use of laboratory and spacecraft-simulator systems, confirmed the effectiveness of this spectroscopic technique for the detection of major and minor mineralogical phases of the samples, the latter being of critical importance for the recognition of geological processes that could have occurred on Mars and other planets. In light of the forthcoming missions to Mars, the results obtained through the RLS ExoMars Simulator offer a valuable insight on the scientific outcome that could derive from the RLS spectrometer that will soon land on Mars as part of the ExoMars rover payload.