NDLI: Problems Involved in Using Improper Calibration CRMs in Geochemical Analyses: A Case Study on Mafic Rocks of Boggulakonda Pluton, East of Cuddapah Basin, India

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Problems Involved in Using Improper Calibration CRMs in Geochemical Analyses: A Case Study on Mafic Rocks of Boggulakonda Pluton, East of Cuddapah Basin, India

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Problems Involved in Using Improper Calibration CRMs in Geochemical Analyses: A Case Study on Mafic Rocks of Boggulakonda Pluton, East of Cuddapah Basin, India

Content Provider	Springer Nature Link
Author	Subramanyam, K. S. V. Balaram, V. Reddy, U. V. B. Satyanarayanan, M. Sawant, S. S.
Copyright Year	2012
Abstract	The performance and response of two commonly used certified reference materials (CRMs) for mafic rocks MRG-1 (CANMET, Canada) and JGb-1 (Geological Survey of Japan), both gabbroic in composition, are evaluated for a set of mafic plutonic rocks (gabbros) from Boggulakonda (BK) occurring to the east of Proterozoic Cuddapah Basin, South India. In this study, quadrupole-inductively coupled plasma mass spectrometry was used to generate trace and rare earth element (REE) data using MRG-1 and JGb-1 as calibration standards separately for a comparative study. It is found that the two CRMs show highly variable major, minor and trace element compositions except ΣREE. When used for BK gabbros, JGb-1 has yielded better results than MRG-1 with respect to trace elements (HFS elements Nb and Ta in specific), whereas a good agreement was observed between both CRMs for REE concentrations when compared with certified data. The Nb–Ta element distribution patterns for BK gabbros in the spidergrams plotted using JGb-1 as CRM show relatively prominent and pronounced negatively spiking anomalies with reference to Th, whereas using MRG-1 as calibration CRM yielded unresolved and unclear Nb–Ta anomalies in the present study. The geochemistry (major, minor and trace) of MRG-1 is different when compared to that of JGb-1. Probably this is reason for the disparity in the results obtained by inductively coupled plasma mass spectrometry on mafic plutonic rocks. The study conducted on the BK gabbros, reveals better and reliable results using JGb-1 as CRM. This study also reveals the importance of using proper CRM for calibration having closely matching trace and REE concentrations in addition to major and minor elements, for obtaining reliable data in geological samples.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	09703950
Journal	MAPAN
Volume Number	28
Issue Number	1
e-ISSN	09749853
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-10-16
Publisher Institution	Metrology Society of India
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Boggulakonda gabbro ICP-MS Certified reference material MRG-1 JGb-1 Trace and REE geochemistry Measurement Science and Instrumentation Theoretical, Mathematical and Computational Physics Mathematical Methods in Physics Numerical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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