Application of laser ablation-ICP-MS to determine high-resolution elemental profiles across the Cretaceous/Paleogene boundary at Agost (Spain)

Claudia Sosa-Montes de Oca; Gert J. de Lange; Francisca Martínez-Ruiz; Francisco J. Rodríguez-Tovar

doi:10.1016/j.palaeo.2018.02.012

Application of laser ablation-ICP-MS to determine high-resolution elemental profiles across the Cretaceous/Paleogene boundary at Agost (Spain)

Claudia Sosa-Montes de Oca^*
, Gert J. de Lange
, Francisca Martínez-Ruiz
, Francisco J. Rodríguez-Tovar

^*Corresponding author for this work

Departamento de Estratigrafía y Paleontología
University of Granada
CSIC

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

A high-resolution analysis of the distribution of major and trace elements across a Cretaceous/Paleogene boundary (KPgB) was done using Laser Ablation-Inductivity Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and was compared with traditional distinct sampling and analysis. At the Agost site (SE Spain) a 22-cm-long core containing the KPgB was recovered using a Rolatec RL-48L drill. Within this interval, the lowermost 5 cm correspond to the Maastrichtian and the uppermost 17 cm to the Danian. The core section was resin-embedded under O₂-free conditions, cut and polished for LA-ICP-MS continuous measurements with 10 μm increments and a laser-beam of 80 μm. Elemental concentrations in discrete samples taken prior to embedding from the same core interval were determined by Inductivity Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The LA-ICP-MS analyses in continuous mode considerably improve the resolution of geochemical profiles, allowing the compositional variability at a micrometer scale within the ejecta layer to be detected. In this study, we obtained profiles with 255 data points for the ejecta layer interval compared to 3 data points obtained by traditional manual sampling and ICP-OES analyses. Yet our recovered core section showed a rather limited preservation of the ejecta layer. This paper focuses on the presentation of LA-ICP-MS analysis as a particularly useful tool to investigate paleoenvironmental changes associated with bio-events. Additionally, the high-resolution of major and trace elemental distribution made it possible to study remobilization across thin but distinct boundaries such as the KPgB.

Original language	English
Pages (from-to)	128-138
Number of pages	11
Journal	Palaeogeography, Palaeoclimatology, Palaeoecology
Volume	497
DOIs	https://doi.org/10.1016/j.palaeo.2018.02.012
Publication status	Published - 15 May 2018

Funding

This research was funded through Projects CGL2012-33281 , CGL2012-32659 , CGL2015-66835 , and CGL2015-66830 , Project RNM-05212 ( Secretaría de Estado de I+D+I, Spain ), Research Groups RNM-178 and RNM-179 ( Junta de Andalucía ) and FEDER funds. The research of Sosa-Montes de Oca was supported by a pre-doctoral fellowship from the Spanish Ministry, MINECO. We are likewise grateful to Elisa Holanda for laboratory assistance at University of Granada and Amalia Filippidi, Anne Roepert and Alejandra Morera Chavarria for their help during the resin-embedding process at Utrecht University. Furthermore, we acknowledge access to the LA-ICP-MS facility at Geociences-Utrecht and in particular the skillful assistance of Helen de Waard during the LA-ICP-MS analysis, and thank Rick Hennekam for his valuable advice on data processing. SEM-analyses were performed at the Centre for Scientific Instrumentation (CIC), University of Granada (Spain). The manuscript greatly benefited from valuable comments and suggestions made by editor Tomas Algeo and reviewers Eustoquio Molina, Steve Goderis, and an anonymous 3rd reviewer.

Keywords

Bio-events
Ejecta layer
KPgB
LA-ICP-MS
Resin-embedding
Trace-element remobilization

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title = "Application of laser ablation-ICP-MS to determine high-resolution elemental profiles across the Cretaceous/Paleogene boundary at Agost (Spain)",

abstract = "A high-resolution analysis of the distribution of major and trace elements across a Cretaceous/Paleogene boundary (KPgB) was done using Laser Ablation-Inductivity Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and was compared with traditional distinct sampling and analysis. At the Agost site (SE Spain) a 22-cm-long core containing the KPgB was recovered using a Rolatec RL-48L drill. Within this interval, the lowermost 5 cm correspond to the Maastrichtian and the uppermost 17 cm to the Danian. The core section was resin-embedded under O2-free conditions, cut and polished for LA-ICP-MS continuous measurements with 10 μm increments and a laser-beam of 80 μm. Elemental concentrations in discrete samples taken prior to embedding from the same core interval were determined by Inductivity Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The LA-ICP-MS analyses in continuous mode considerably improve the resolution of geochemical profiles, allowing the compositional variability at a micrometer scale within the ejecta layer to be detected. In this study, we obtained profiles with 255 data points for the ejecta layer interval compared to 3 data points obtained by traditional manual sampling and ICP-OES analyses. Yet our recovered core section showed a rather limited preservation of the ejecta layer. This paper focuses on the presentation of LA-ICP-MS analysis as a particularly useful tool to investigate paleoenvironmental changes associated with bio-events. Additionally, the high-resolution of major and trace elemental distribution made it possible to study remobilization across thin but distinct boundaries such as the KPgB.",

keywords = "Bio-events, Ejecta layer, KPgB, LA-ICP-MS, Resin-embedding, Trace-element remobilization",

author = "\{Sosa-Montes de Oca\}, Claudia and \{de Lange\}, \{Gert J.\} and Francisca Mart{\'i}nez-Ruiz and Rodr{\'i}guez-Tovar, \{Francisco J.\}",

year = "2018",

month = may,

day = "15",

doi = "10.1016/j.palaeo.2018.02.012",

language = "English",

volume = "497",

pages = "128--138",

journal = "Palaeogeography, Palaeoclimatology, Palaeoecology",

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Application of laser ablation-ICP-MS to determine high-resolution elemental profiles across the Cretaceous/Paleogene boundary at Agost (Spain). / Sosa-Montes de Oca, Claudia; de Lange, Gert J.; Martínez-Ruiz, Francisca et al.
In: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 497, 15.05.2018, p. 128-138.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Application of laser ablation-ICP-MS to determine high-resolution elemental profiles across the Cretaceous/Paleogene boundary at Agost (Spain)

AU - Sosa-Montes de Oca, Claudia

AU - de Lange, Gert J.

AU - Martínez-Ruiz, Francisca

AU - Rodríguez-Tovar, Francisco J.

PY - 2018/5/15

Y1 - 2018/5/15

N2 - A high-resolution analysis of the distribution of major and trace elements across a Cretaceous/Paleogene boundary (KPgB) was done using Laser Ablation-Inductivity Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and was compared with traditional distinct sampling and analysis. At the Agost site (SE Spain) a 22-cm-long core containing the KPgB was recovered using a Rolatec RL-48L drill. Within this interval, the lowermost 5 cm correspond to the Maastrichtian and the uppermost 17 cm to the Danian. The core section was resin-embedded under O2-free conditions, cut and polished for LA-ICP-MS continuous measurements with 10 μm increments and a laser-beam of 80 μm. Elemental concentrations in discrete samples taken prior to embedding from the same core interval were determined by Inductivity Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The LA-ICP-MS analyses in continuous mode considerably improve the resolution of geochemical profiles, allowing the compositional variability at a micrometer scale within the ejecta layer to be detected. In this study, we obtained profiles with 255 data points for the ejecta layer interval compared to 3 data points obtained by traditional manual sampling and ICP-OES analyses. Yet our recovered core section showed a rather limited preservation of the ejecta layer. This paper focuses on the presentation of LA-ICP-MS analysis as a particularly useful tool to investigate paleoenvironmental changes associated with bio-events. Additionally, the high-resolution of major and trace elemental distribution made it possible to study remobilization across thin but distinct boundaries such as the KPgB.

AB - A high-resolution analysis of the distribution of major and trace elements across a Cretaceous/Paleogene boundary (KPgB) was done using Laser Ablation-Inductivity Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and was compared with traditional distinct sampling and analysis. At the Agost site (SE Spain) a 22-cm-long core containing the KPgB was recovered using a Rolatec RL-48L drill. Within this interval, the lowermost 5 cm correspond to the Maastrichtian and the uppermost 17 cm to the Danian. The core section was resin-embedded under O2-free conditions, cut and polished for LA-ICP-MS continuous measurements with 10 μm increments and a laser-beam of 80 μm. Elemental concentrations in discrete samples taken prior to embedding from the same core interval were determined by Inductivity Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The LA-ICP-MS analyses in continuous mode considerably improve the resolution of geochemical profiles, allowing the compositional variability at a micrometer scale within the ejecta layer to be detected. In this study, we obtained profiles with 255 data points for the ejecta layer interval compared to 3 data points obtained by traditional manual sampling and ICP-OES analyses. Yet our recovered core section showed a rather limited preservation of the ejecta layer. This paper focuses on the presentation of LA-ICP-MS analysis as a particularly useful tool to investigate paleoenvironmental changes associated with bio-events. Additionally, the high-resolution of major and trace elemental distribution made it possible to study remobilization across thin but distinct boundaries such as the KPgB.

KW - Bio-events

KW - Ejecta layer

KW - KPgB

KW - LA-ICP-MS

KW - Resin-embedding

KW - Trace-element remobilization

UR - https://www.scopus.com/pages/publications/85042314326

U2 - 10.1016/j.palaeo.2018.02.012

DO - 10.1016/j.palaeo.2018.02.012

M3 - Article

AN - SCOPUS:85042314326

SN - 0031-0182

VL - 497

SP - 128

EP - 138

JO - Palaeogeography, Palaeoclimatology, Palaeoecology

JF - Palaeogeography, Palaeoclimatology, Palaeoecology

ER -

Application of laser ablation-ICP-MS to determine high-resolution elemental profiles across the Cretaceous/Paleogene boundary at Agost (Spain)

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Keywords

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