In situ high-precision lithium isotope analyses at low concentration levels with femtosecond-LA-MC-ICP-MS

2019 ◽  
Vol 34 (7) ◽  
pp. 1447-1458 ◽  
Author(s):  
Lena K. Steinmann ◽  
Martin Oeser ◽  
Ingo Horn ◽  
Hans-Michael Seitz ◽  
Stefan Weyer
Keyword(s):  
High Precision ◽  
Signal Intensity ◽  
Lithium Isotope ◽  
Single Measurement ◽  
Low Concentration ◽  
Icp Ms ◽  
Isotope Analyses ◽  
Concentration Levels

Precision of a single measurement in the low signal intensity area is better with a combination of a 1013 Ω amplifier and a SEM.

Development of sulfide reference materials for in situ platinum group elements and S–Pb isotope analyses by LA-(MC)-ICP-MS

2018 ◽  
Vol 33 (12) ◽  
pp. 2172-2183 ◽  
Author(s):  
Yantong Feng ◽  
Wen Zhang ◽  
Zhaochu Hu ◽  
Yongsheng Liu ◽  
Kang Chen ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Reference Materials ◽  
Platinum Group Elements ◽  
Pb Isotopes ◽  
Synthetic Method ◽  
Pb Isotope ◽  
Icp Ms ◽  
Platinum Group ◽  
Isotope Analyses

A new synthetic method has been used to prepare sulfide reference materials for the in situ analysis of PGEs and S–Pb isotopes. The results indicate that the hydrothermal synthesis of the nanoparticles can serve as a potentially effective approach for the preparation of microanalysis reference materials.

High-precision in situ analysis of Pb isotopes in melt inclusions by LA-ICP-MS and application of Independent Component Analysis

2018 ◽  
Vol 52 (1) ◽  
pp. 69-74 ◽  
Author(s):  
Morihisa Hamada ◽  
Jun-Ichi Kimura ◽  
Qing Chang ◽  
Takeshi Hanyu ◽  
Takayuki Ushikubo ◽  
...  
Keyword(s):  
Independent Component Analysis ◽  
High Precision ◽  
Melt Inclusions ◽  
Component Analysis ◽  
Independent Component ◽  
Pb Isotopes ◽  
Icp Ms

High-precision Mg isotope analyses of low-Mg rocks by MC-ICP-MS

2014 ◽  
Vol 390 ◽  
pp. 9-21 ◽  
Author(s):  
Yajun An ◽  
Fei Wu ◽  
Yuanxin Xiang ◽  
Xiaoyun Nan ◽  
Xun Yu ◽  
...  
Keyword(s):  
High Precision ◽  
Icp Ms ◽  
Isotope Analyses

scholarly journals Combined U-Pb and Lu-Hf isotope analyses by laser ablation MC-ICP-MS: methodology and applications

2010 ◽  
Vol 82 (2) ◽  
pp. 479-491 ◽  
Author(s):  
Massimo Matteini ◽  
Elton L. Dantas ◽  
Marcio M. Pimentel ◽  
Bernhard Bühn
Keyword(s):  
Isotopic Ratio ◽  
Sediment Provenance ◽  
Significant Information ◽  
Icp Ms ◽  
Borborema Province ◽  
Isotopic Studies ◽  
The University ◽  
Isotope Analyses ◽  
Magmatic Event

The Lutetium-Hafnium isotopic system represents one of the most innovative and powerful tools for geochronology and isotopic studies. Combined U-Pb and Lu-Hf in situ analyses on zircon by LA-MC-ICP-MS permit to characterize isotopically the host magma from which it crystallized furnishing significant information for sediment provenance and crustal evolution studies. In this paper e describe the Lu-Hf systematic by LA-MC-ICP-MS developed in the laboratory of Geochronology of the University of Brasilia and report the results obtained by repeated analyses of 176Hf/177Hf isotopic ratio of three zircon standards: GJ-1 = 0.282022 ± 11 (n=56), Temora 2 = 0.282693 ± 14 (n=25) and UQZ = 0.282127 ± 33 (n=11). The 176Hf/177Hf ratio (0.282352 ± 22, n=14) of gem quality zircon used as in-house standard have been also characterized. As a geological application, we analyzed two complex zircons selected from a migmatitic rocks from the Borborema Province, NE Brazil. On the basis of U-Pb and Lu-Hf data, two main crystallization events have been identified in both studied zircons. An older event at ca. 2.05 Ga recognized in the inherited cores represents a well-characterized paleoproterozoic magmatic event that affected the whole Borborema Province. A second crystallization event at ~ 575 Ma, recognized at the rims, represents a Neoproterozoic (Brazilian) high grade metamorphic-magmatic event.

In situ high-precision Ni isotope analysis of metals by femtosecond-LA-MC-ICP-MS

2017 ◽  
Vol 32 (7) ◽  
pp. 1312-1319 ◽  
Author(s):  
Mona Weyrauch ◽  
Martin Oeser ◽  
Annika Brüske ◽  
Stefan Weyer
Keyword(s):  
Laser Ablation ◽  
High Precision ◽  
Isotope Analysis ◽  
Femtosecond Laser Ablation ◽  
Stable Isotope Ratios ◽  
Precision Determination ◽  
Icp Ms ◽  
High Precision Determination

In this study, an in situ technique for high-precision determination of Ni stable isotope ratios by femtosecond-laser ablation-multicollector-ICP-MS (fs-LA-MC-ICP-MS) was developed.

A new method for high-precision palladium isotope analyses of iron meteorites and other metal samples

2017 ◽  
Vol 32 (3) ◽  
pp. 647-656 ◽  
Author(s):  
Mattias Ek ◽  
Alison C. Hunt ◽  
Maria Schönbächler
Keyword(s):  
High Precision ◽  
Iron Meteorite ◽  
New Method ◽  
Iron Meteorites ◽  
Icp Ms ◽  
Isotope Analyses

We present a new method for separation of Pd from an iron meteorite matrix and high precision analyses of all isotopes via multi collector ICP-MS.

scholarly journals Resolving the timescales of magmatic and hydrothermal processes associated with porphyry deposit formation using zircon U–Pb petrochronology

Geochronology ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 209-230 ◽  
Author(s):  
Simon J. E. Large ◽  
Jörn-Frederik Wotzlaw ◽  
Marcel Guillong ◽  
Albrecht von Quadt ◽  
Christoph A. Heinrich
Keyword(s):  
Mass Spectrometry ◽  
Trace Element ◽  
High Precision ◽  
Magma Reservoir ◽  
Short Time Interval ◽  
Porphyry Deposit ◽  
Porphyry Cu ◽  
Hydrothermal Processes ◽  
Icp Ms

Abstract. Understanding the formation of economically important porphyry Cu–Au deposits requires knowledge of the magmatic-to-hydrothermal processes that act within the much larger magmatic system and the timescales on which they occur. We apply high-precision zircon geochronology (chemical abrasion–isotope dilution–thermal ionisation mass spectrometry; CA–ID–TIMS) and spatially resolved zircon geochemistry (laser ablation inductively coupled plasma mass spectrometry; LA-ICP-MS) to constrain the magmatic evolution of the underlying magma reservoir at the Pliocene Batu Hijau porphyry Cu–Au deposit. We then use this extensive dataset to assess the accuracy and precision of different U–Pb dating methods of the same zircon crystals. Emplacement of the oldest pre- to syn-ore tonalite (3.736±0.023 Ma) and the youngest tonalite porphyry to cross-cut economic Cu–Au mineralisation (3.646±0.022 Ma) is determined by the youngest zircon grain from each sample, which constrains the duration of metal precipitation to fewer than 90±32 kyr. Overlapping spectra of single zircon crystallisation ages and their trace element distributions from the pre-, syn and post-ore tonalite porphyries reveal protracted zircon crystallisation together with apatite and plagioclase within the same magma reservoir over >300 kyr. The presented petrochronological data constrain a protracted early >200 kyr interval of melt differentiation and cooling within a large heterogeneous magma reservoir, followed by magma storage in a highly crystalline state and chemical and thermal stability over several tens of thousands of years during which fluid expulsion formed the ore deposit. Irregular trace element systematics suggest magma recharge or underplating during this final short time interval. The comparison of high-precision CA–ID–TIMS results with in situ LA-ICP-MS and a sensitive high-resolution ion microprobe (SHRIMP) U–Pb geochronology data from the same zircon grains allows a comparison of the applicability of each technique as a tool to constrain dates and rates on different geological timescales. All techniques provide accurate dates but with different precision. Highly precise dates derived by the calculation of the weighted mean and standard error of the mean of the zircon dates obtained by in situ techniques can lead to ages of unclear geological significance that are older than the maximum ages of emplacement given by the CA–ID–TIMS ages of the youngest zircons in each sample. This lack of accuracy of the weighted means is due to the protracted nature of zircon crystallisation in upper crustal magma reservoirs, suggesting that standard errors should not be used as a means to describe the uncertainty in those circumstances. We conclude from this and similar published studies that the succession of magma and fluid pulses forming a single porphyry deposit and similarly rapid geological events are too fast to be reliably resolved by in situ U–Pb geochronology and that assessing the tempo of ore formation requires CA–ID–TIMS geochronology.

scholarly journals High precision Sr isotope analyses in apatite by LA-MC-ICP-MS: from mineral inclusions in zircon to crustal evolution models

2021 ◽  
Author(s):  
Anda Buzenchi ◽  
Hugo Moreira ◽  
Olivier Bruguier ◽  
Delphine Bosch ◽  
Bruno Dhuime
Keyword(s):  
High Precision ◽  
Crustal Evolution ◽  
Sr Isotope ◽  
Mineral Inclusions ◽  
Icp Ms ◽  
Isotope Analyses

scholarly journals In situ Sr isotope analyses by LA-MC-ICP-MS of igneous apatite and plagioclase from magmatic rocks at the CPGeo-USP

2016 ◽  
Vol 46 (suppl 1) ◽  
pp. 227-243
Author(s):  
Patricio Montecinos Munoz ◽  
Adriana Alves ◽  
Rogério Guitarrari Azzone ◽  
Pablo Cordenons ◽  
Sandra Morano ◽  
...  
Keyword(s):  
Magma Mixing ◽  
Successful Implementation ◽  
Geochemical Processes ◽  
Sr Isotope ◽  
Magmatic Rocks ◽  
Icp Ms ◽  
Isotope Analyses ◽  
Better Than

ABSTRACT: This contribution describes the successful implementation of in situ Sr isotope analyses by LA-MC-ICP-MS at the CPGeo-USP. The choice for an analytical configuration using measurements of half-masses allows the accurate assessment of lanthanide interferences, permitting the determination of Sr isotopes in important REE-rich accessory phases, such as apatite. Likewise, the on-peak-zero method effectively corrects the background contribution (both from Kr and residual Sr contributions from previous ablations) to the signals of the unknown samples. The analytical campaigns resulted in an accuracy, in respect to reference TIMS values, better than 57 ppm (~ ±0.000057 2σ SD) for a modern coral and the Batjberg clinopyroxene which impart significant quality to our data. Similarly, the majority of the stable Sr isotope ratios are close to the accepted values, which also confirms the effectiveness of the method. The achieved accuracy allows the identification and investigation of spatially-controlled isotopic heterogeneities on the micrometric scale in several Sr-rich minerals (apatite, carbonates, plagioclase, and clinopyroxene) with important implications to the understanding of relevant geochemical processes, particularly AFC, source geochemical heterogeneities and magma-mixing.

Sign in / Sign up

Export Citation Format

Share Document