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Multi-stage magma evolution recorded by apatite and zircon of adakite-like rocks: A case study from the Shatanjiao intrusion, Tongling region, Eastern China by Jingya Cao; Huan Li; Xiaoyong Yang; Landry Soh Tamehe; Rasoul Esmaeili is a Earth and Planetary Sciences article available to read on EtoBox.

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The Shatanjiao pluton, located in the eastern Tongling region (Eastern China), is of great research significance for the study of magma evolutionary processes because this pluton is related to the regional Cu-Au mineralization. Zircon U-Pb dating on two granodiorite samples from this pluton yields ages of 141.9 ± 3.1 Ma (MSWD = 0.07) and 141.9 ± 3.3 Ma (MSWD = 0.03), respectively, which overlap the range of intense Late Jurassic to Early Cretaceous magmatism in the Tongling region. Based on the Sr content of apatite from the Shatanjiao granodiorites, they are subdivided into high-Sr apatite (apatite-I: 754-1242 ppm, mean = 1107 ppm) and low-Sr apatite (apatite-II: 415-613 ppm, mean = 507 ppm). Both apatite-I and apatite-II are characterized by high-Sr and -Sr/Y ratios and inconspicuous negative-Eu anomalies, indicating that these granodiorites have a likely adakite affinity. Considering their low-Rb contents (<0.05 ppm), in situ Sr isotopes of these apatite grains show 87 Sr/ 86 Sr ratios of 0.70848-0.71494 and 0.70767-0.71585 for apatite-I and apatite-II, respectively, indicating that the 87 Sr/ 86 Sr ratios of both apatite groups can represent the Sr isotopic compositions of thei

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Author

Jingya Cao; Huan Li; Xiaoyong Yang; Landry Soh Tamehe; Rasoul Esmaeili

Publisher

Mineralogical Society of America

Published

2022

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)