36 Progress Towards Geologic CO2 Storage in the Eastern United States

Tuesday, 16 April 2024
8:00 AM - 12:00 PM
Victoria

QUANTIFICATION OF BRUCITE AND SERPENTINE IN PERIDOTITE ROCKS WITH UV/VIS/NIR SPECTROSCOPY AND CHEMOMETRIC MODELING

Paper number: 36-10
Program: Theme Sessions
Time: 10:45 AM – 11:05 AM

Authors

Abstract

Brucite rich serpentinized peridotite (BRSP) rocks can be used as the storage for greenhouse gas as Brucite is known to react with carbon dioxide (CO2). Therefore, it is important to characterize the brucite content in the BRSP rocks before they can be applied for the carbon capture and storage (CCS) projects. Additionally, characterizing brucite from serpentine in these deposits can be challenging, resulting in a need for more precise technology.

UV/Vis/NIR spectroscopy has been proven as a promising tool in characterizing minerals. In this study, a full range (350nm – 2500nm) ultra high-resolution spectrometer is used to measure the UV/Vis/NIR spectra of brucite and serpentine rich rock powders. The full range spectral analysis allows for the identification and quantification of brucite and serpentine minerals with ultra high spectral resolution.
This study aims to educate on the basis of technology and give a detailed instruction on chemometric model building. A case study was completed to build a Partial Least Square Regression (PLSR) model to quantify the brucite concentration in unknown samples. UV/Vis/NIR is used as an identification and validation tool with other types of quantitative technologies.

Geological Society of America Abstracts with Programs. Vol. 56, No. 2

doi: 10.1130/abs/2024SE-397121

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