Precise micrometre-sized Pb-Pb and U-Pb dating with NanoSIMS

Yang, Wei; Lin, Yangting; Zhang, Jianchao; Hao, Jialong; Shen, Wenjie; Hu, Sen

doi:10.1039/c2ja10303f

Cited by 42 publications

(155 citation statements)

References 27 publications

(45 reference statements)

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“…The Pb isotopic IMF was less than 0.9% and thus negligible (Yang et al. ). The raw isotopic ratios and analytical errors of 204 Pb/ 206 Pb, 207 Pb/ 206 Pb, 206 Pb/ 238 U, and 238 U 16 O 2 / 238 U were extracted from each cycle of the selected regions of interests (ROIs).…”

Section: Sample and Experimentsmentioning

confidence: 99%

Ancient geologic events on Mars revealed by zircons and apatites from the Martian regolith breccia NWA 7034

Lin

Zhang

et al. 2019

Meteorit & Planetary Scien

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Zircons and apatites in clasts and matrix from the Martian breccia NWA 7034 are well documented, timing ancient geologic events on Mars. Furthermore, in this study, zircon trace elemental content, apatite volatile content, and apatite volatile isotopic compositions measured in situ could constrain the evolution of those geologic events. The U‐Pb dates of zircons in basalt, basaltic andesite, trachyandesite igneous clasts, and the matrix are similar (4.4 Ga) suggesting intense volcanism on ancient Mars. However, two metamict zircon grains found in the matrix have an upper intercept date of ~4465 Ma in crystalline, whereas amorphous areas have a lower intercept date of 1634 ± 93 Ma. The younger date is consistent with the date of apatites (1530 ± 65 Ma), suggesting a metamorphic event that completely reset the U‐Pb system in both the amorphous areas of zircon and all apatites. δD values in all apatites negatively correlate with water content in a two‐endmember mixing trend. The D (δD up to 2459‰) and 37Cl heavy core (3.8‰) of a large apatite grain suggest a D‐, 37Cl‐rich fluid during the metamorphic event ~1.6 Ga ago, consistent with the trace elements Y, Hf and Ti and P in zircons. The fluid was also therefore P‐rich. The D‐, 37Cl‐poor H2O‐rich rim (<313‰) suggests the degassing of water from the Martian Cl‐poor interior at a later time. This D‐, 37Cl‐poor Martian mantle reservoir could have derived from volcanic intrusions postdating the younger metamorphic event recorded in NWA 7034.

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Section: Sample and Experimentsmentioning

confidence: 99%

Ancient geologic events on Mars revealed by zircons and apatites from the Martian regolith breccia NWA 7034

Lin

Zhang

et al. 2019

Meteorit & Planetary Scien

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“…In addition, the NanoSIMS has an obvious advantage on spatial resolution over all sector SIMS instruments. Yang et al has tuned a 1.7‐μm primary beam with an intensity of approximately 500 pA using a NanoSIMS, which has far more density than the primary beam achieved in this study. However, because of the small geometry design and the lack of oxygen flooding technique, the secondary ion sensitivity for Pb + is only approximately 4 cps/nA/ppm, significantly lower than that obtained by IMS‐1280HR in this method (>23 cps/nA/ppm, measured using M257 zircon with 206 Pb concentration of approximately 75 ppm, under condition of O − primary beam combined with oxygen flooding).…”

Section: Discussion and Concluding Remarksmentioning

confidence: 82%

“…In addition, the NanoSIMS has an obvious advantage on spatial resolution over all sector SIMS instruments. Yang et al 8 NanoSIMS is preferentially chosen to satisfy the high spatial resolution requirement firstly; for beam size >2-μm scale situation, IMS-1280HR can achieve a better precision than that of the NanoSIMS.…”

Section: Qinghu Zirconmentioning

confidence: 99%

“…On the basis of the design of coaxial primary and secondary ion path, NanoSIMS analytical method can achieve spatial resolutions up to approximately 50 nm. By using this instrument, Stern et al proposed a zircon Pb–Pb dating method of approximately 5‐μm scale, and Yang et al improved zircon Pb–Pb dating and U–Pb dating methods to spatial scales of approximately 2 and approximately 5 μm, respectively. Hu et al further developed an imaged zircon U–Pb dating method, in which U–Pb age can be calculated for a selected area in the image.…”

Section: Introductionmentioning

confidence: 99%

“…In order to improve the spatial resolution of the SIMS analytical method, many attempts have been carried out in previous works. [3][4][5][6][7][8] On the basis of the design of coaxial primary and secondary ion path, NanoSIMS analytical method can achieve spatial resolutions up to approximately 50 nm. By using this instrument, Stern et al 6 Significant advances in spatial resolution were obtained in these methods.…”

Section: Introductionmentioning

confidence: 99%

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Breakthrough of 2‐ to 3‐μm scale U–Pb zircon dating using Cameca IMS‐1280HR SIMS

Liu

et al. 2020

Surface & Interface Analysis

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A zircon U–Pb dating method with a high spatial resolution of 2‐ to 3‐μm was successfully implemented by using Cameca IMS‐1280HR SIMS in this study. Homemade cathode and modified intermediate pole were used to improve the intrinsic performance of duoplasmatron ion source. An O− primary beam with intensity of approximately 3 μA and stability of 0.68% over 40 minutes was achieved and could be used continuously for more than 240 hours under high current conditions. Under Gaussian illumination mode, a 2‐ to 3‐μm O− primary beam was obtained with an intensity of approximately 200 pA. Four standard zircons, namely, 91500, Temora, Plešovice, and Qinghu, were dated using the 2‐ to 3‐μm high spatial resolution U–Pb isotopic analysis, yielding U–Pb ages consistent with their recommended values, within errors. Our work shows that zircon U–Pb dating with high accuracy and spatial resolution can be achieved, on the basis of a series of duoplasmatron modification and instrumental optimization.

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Novel Methods for Bioimaging Including LA‐ICP‐MS , NanoSIMS , TEM / X‐EDS , and SXRF

Schaumlöffel

Hutchinson²,

Malherbe

et al. 2016

Metallomics

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DOI: 10.1002/9783527694907.ch4International audienceThis chapter presents four complementary element-specific bioimaging techniques: laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), nano secondary ion mass spectrometry (NanoSIMS), transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy (TEM/X-EDS), and synchrotron-based X-ray fluorescence (SXRF). LA-ICP-MS is a spatially resolved analytical technique mainly measuring metallic elements in solidmaterials. LA-ICP-MS bioimaging analysis has been applied to cancer studies to investigate metal-ion distribution changes in diseased versus healthy tissues. SIMS is an analytical technique that relies on the sputtering of ions from a solid surface by focused positive or negative primary ion beams and the subsequent analysis of the produced secondary ions by a mass spectrometer under high vacuum. NanoSIMS and TEM/X-EDS are operated under high vacuum where the sample is exposed to a high-energy ion beam or electron beam. These facts demand specific sample preparation strategies for biological samples, which are similar for both techniques and can be regarded together

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Precise micrometre-sized Pb-Pb and U-Pb dating with NanoSIMS

Cited by 42 publications

References 27 publications

Ancient geologic events on Mars revealed by zircons and apatites from the Martian regolith breccia NWA 7034

Ancient geologic events on Mars revealed by zircons and apatites from the Martian regolith breccia NWA 7034

Breakthrough of 2‐ to 3‐μm scale U–Pb zircon dating using Cameca IMS‐1280HR SIMS

Novel Methods for Bioimaging Including LA‐ICP‐MS , NanoSIMS , TEM / X‐EDS , and SXRF

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