加拿大中部斯拉夫克拉通(Ekati 钻石矿)41 块夕卡岩和辉绿岩地幔异岩石的地球化学特征

IF 3.3 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
D. E. Jacob, A. Fung
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引用次数: 0

摘要

这篇文章描述了从埃卡提钻石矿(加拿大中斯莱夫克拉通)的四个金伯利岩管中提取的非含钻夕照岩和石榴石辉石的新数据集。由金伯利岩喷发带到地表的闪长岩是地球地幔成分和演化信息的直接来源。特别是夕阳辉石和石榴石辉石析出物,是地幔俯冲到克拉通下面并发生变质作用的见证。此外,这些岩石是金刚石的主要宿主,因此也是深层碳循环的重要组成部分。这套样本包括从钻探岩心回收的 41 块小型异岩石(2-5 厘米)。数据集包括石榴石、倩辉石和钛铁矿的主要元素和微量元素浓度,以及石榴石的稳定氧同位素组成。报告了石榴石和霞石的锶和钕同位素组成,其中有四个样本的体积足够大,可以进行分析。总体而言,该数据集极大地扩展和补充了加拿大斯莱弗克拉通含钻和不含钻异质岩的现有数据集,进一步加深了我们对斯莱弗次克拉通岩石圈成分的了解。该数据集包括几个具有稀有矿物组合的样本,其中包括一个含橄榄石的斜长岩以及含钛铁矿和磷灰石的石榴石-辉绿岩,因此提供的数据揭示了很少报道的金伯利岩中发现的独居石套件的成分细微差别。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Geochemistry of forty-one eclogitic and pyroxenitic mantle xenoliths from the Central Slave Craton, Canada (Ekati Diamond Mine)

Geochemistry of forty-one eclogitic and pyroxenitic mantle xenoliths from the Central Slave Craton, Canada (Ekati Diamond Mine)

This article describes a novel dataset on non-diamondiferous eclogite and garnet pyroxenite xenoliths from four kimberlite pipes of the Ekati Diamond Mine (Central Slave Craton, Canada). Xenoliths brought to the surface by kimberlite eruptions are direct sources of information on the composition and evolution of the Earth's mantle. Eclogite and garnet pyroxenite xenoliths, specifically, are testimony of subduction into, and metasomatism of, the mantle beneath cratons. Furthermore, these rocks are major hosts for diamond and thus an important part of the deep carbon cycle. The sample suite consists of 41 small xenoliths (2–5 cm) recovered from drill cores. The dataset includes major and trace element concentrations for garnet, clinopyroxene and ilmenite, as well as stable oxygen isotope compositions of garnets. Strontium and neodymium isotopic compositions are reported for garnet and clinopyroxene for four samples which were large enough to allow for analysis. Overall, this dataset significantly expands and complements existing datasets on diamondiferous and non-diamondiferous xenoliths from the Slave Craton in Canada, furthering our understanding of the composition of the Slave subcratonic lithosphere. The dataset includes several samples with rare mineral assemblages, including an olivine-bearing eclogite as well as ilmenite and apatite-bearing garnet-pyroxenites, and thus provides data shedding light on rarely reported compositional nuances in xenolith suites found in kimberlites.

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来源期刊
Geoscience Data Journal
Geoscience Data Journal GEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY-METEOROLOGY & ATMOSPHERIC SCIENCES
CiteScore
5.90
自引率
9.40%
发文量
35
审稿时长
4 weeks
期刊介绍: Geoscience Data Journal provides an Open Access platform where scientific data can be formally published, in a way that includes scientific peer-review. Thus the dataset creator attains full credit for their efforts, while also improving the scientific record, providing version control for the community and allowing major datasets to be fully described, cited and discovered. An online-only journal, GDJ publishes short data papers cross-linked to – and citing – datasets that have been deposited in approved data centres and awarded DOIs. The journal will also accept articles on data services, and articles which support and inform data publishing best practices. Data is at the heart of science and scientific endeavour. The curation of data and the science associated with it is as important as ever in our understanding of the changing earth system and thereby enabling us to make future predictions. Geoscience Data Journal is working with recognised Data Centres across the globe to develop the future strategy for data publication, the recognition of the value of data and the communication and exploitation of data to the wider science and stakeholder communities.
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