Understanding VNIR plagioclase signatures on Mars through petrographic, geochemical and spectral characterization of terrestrial feldspar‐bearing igneous rocks

نویسندگان

چکیده

Plagioclase feldspar is a common mineral in terrestrial rocks and has recently been detected on Mars surface with visible near-infrared (VNIR) spectroscopy. The presence of plagioclase using this method determined through the identification an absorption band centered around 1.3 µm reflectance spectra which requires incorporation Fe2+ lattice. Previous laboratory studies powder mixtures showed that should only be detectable if present amounts >90% as its can masked by those mafic minerals. composition, but also size grains associated minerals rock, influence spectral signature feldspars. Thus, analysis whole, uncrushed appears to relevant, for comparisons remote sensing observations have shown plagioclase-like signatures. In work, we performed measurements five feldspar-bearing various nature chosen because they reflect first order magmatic variability. mineralogical composition these samples, chemical crystals, total rock well each were microscopy, electron microprobe, VNIR Our study shows macroscopic containing between 30% 80% different compositions (An25-An67). findings strong implications interpretation signatures belong range could thus give information about formation Mars’ crust.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Río Tinto: A Geochemical and Mineralogical Terrestrial Analogue of Mars

The geomicrobiological characterization of the water column and sediments of Río Tinto (Huelva, Southwestern Spain) have proven the importance of the iron and the sulfur cycles, not only in generating the extreme conditions of the habitat (low pH, high concentration of toxic heavy metals), but also in maintaining the high level of microbial diversity detected in the basin. It has been proven th...

متن کامل

Magma Composition and Igneous Rocks

Introduction In the following chapters we will find that nearly all of the varied aspects of volcanism are either directly or indirectly controlled by the chemical composition of magma and the rate at which it cools and solidifies. If you are to understand and appreciate subsequent discussions of volcanoes and related volcanic phenomena, it is essential that you have a good grasp of the basic c...

متن کامل

Determination of Geochemical Bio-Signatures in Mars-Like Basaltic Environments

Bio-signatures play a central role in determining whether life existed on early Mars. Using a terrestrial basalt as a compositional analog for the martian surface, we applied a combination of experimental microbiology and thermochemical modeling techniques to identify potential geochemical bio-signatures for life on early Mars. Laboratory experiments were used to determine the short-term effect...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal Of Geophysical Research: Planets

سال: 2023

ISSN: ['2169-9100', '2169-9097']

DOI: https://doi.org/10.1029/2022je007680