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Precipitation mechanism, REE characteristics of anhydrite in Nihe deposit and its relation to mineralization

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Liu, Y, Fan, Y and Zhang, L 2017 , 'Precipitation mechanism, REE characteristics of anhydrite in Nihe deposit and its relation to mineralization' , Acta Petrological Sinica, vol. 33, no. 11 , pp. 3531-3544 .

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Abstract

Nihe is a major magnetite-apatite deposit located in the northwestern the Lu-Zong volcanic basin in the Middle-Lower Yangtze River Valley Metallogenic Belt. Anhydrite is extensively developed in the deposit. Based on the betailed field geological work and petrographic observation, the anhydrite can be divided into three types on the basis of the mineral assemblage and stage: Type I, tabular violet crystals coexisting with diopside, magnetite, pyrite and apatite; Type II tabular white crystals coexisting with pyrite; and Type III, equant pink or white crystals in carbonate-anhydrite veins. We present in situ LA-ICP-MS geochemical data for the three different types of anhydrite in Nihe deposit. LA-ICP-MS data indicate that type I anhydrite contains much more REE than the other two types, and the REE pattern and Eu anomaly is also quite different ((La/Yb)N = 1.1 ~466,

Item Type: Article
Authors/Creators:Liu, Y and Fan, Y and Zhang, L
Keywords: Luzong volcanic basin, Nihe iron deposit, LA-ICPMS, REE, anhydrite
Journal or Publication Title: Acta Petrological Sinica
Publisher: Science China Press
ISSN: 1000-0569
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Copyright 2017 Science China Press

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