Dr. Lourdes Fernández-Díaz Profile

Dr. Lourdes Fernández-Díaz

at Univ Complutense de Madrid

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 12 September 2021 Poster + Paper

Application of laboratory reflectance spectroscopy in the characterization of uranium-bearing minerals associated with fossils remains

Juncal Cruz, Ismael Coronado, Montserrat Ferrer-Julià, Lourdes Fernández-Díaz, Eduardo Garcia-Melendez, Elena Colmenero-Hidalgo, Esperanza Fernández-Martínez

Proceedings Volume 11863, 118631D (2021) https://doi.org/10.1117/12.2600332

KEYWORDS: Bone, Mica, Reflectivity, Molecules, Fermium, Infrared spectroscopy

Read Abstract +

The characterization of uranium-bearing minerals by different remote sensing technologies is a challenging task due to the implications for the exploration or the protection of uranium deposits. In nature, uranium-rich mineral ores are often associated with phosphates. Fossil bones may contain almost 1% of uranium as a result of interaction with ground water or other uranyl-bearing mineralizing fluids during fossil diagenesis. Sediments in the Lower Miocene fossil site of Córcoles (Guadalajara, Spain), in the Tajo Basin, host uranyl-vanadate metatyuyamunite associated with mammal fossils, constituting a remarkable example of the relationship between uranium ores and phosphates. The mineralogical composition and the spectral response of different phosphates (geological fluorapatite, fossil fluorapatite from Paracuellos III fossil site, and Recent hydroxyapatite) and uranyl-bearing minerals (metatorbernite, metautunite, metauranocircite and fossils from Córcoles Fm with metatyuyamunite) were studied through laboratory reflectance spectroscopy. Spectral features of the different samples were compared with XRD, XRF and FTIR-ATR to determine the relationships between reflectance spectral curves, mineralogy and chemical composition. It should be highlighted that reflectance signatures of uranyl micas and Ca-phosphates allow for the mineral identification. Fluorapatite samples show absorption bands at 586, 737, 750, 805 nm related to the phosphate anion, not always present in uranyl-phosphate micas and a characteristic chemical heterogeneity probably caused by REE content. Uranyl-bearing minerals show absorption features at 1100, 1330 and 1672 nm attributed to uranyl anions (UO₂ ²⁺). Although further research is needed this study highlights the use of laboratory reflectance spectroscopy in uranium detection.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years