Multi-isotope tracing of the 1.3–0.9 Ga evolution of Fennoscandia; crustal growth during the Sveconorwegian orogeny

Granseth, Anette; Slagstad, Trond; Hagen‐Peter, Graham; Kirkland, Christopher L.; Møkkelgjerd, Steinar Halvdan Hansen; Røhr, Torkil S.; Coint, Nolwenn; Sørensen, Bjørn Eske

doi:10.1016/j.gr.2020.10.019

Cited by 11 publications

(1 citation statement)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hf-Nd isotopic data were used to distinguish between juvenile and old crustal components (Wang et al, 2009;Mole et al, 2013;Wang et al, 2016;Granseth et al, 2021;Xu et al, 2021). Juvenile crust, with isotopic values that plot on or close to the depleted mantle evolution line, is regarded as crustal material that is generated directly from the depleted mantle or remelted from material recently extracted from the depleted mantle.…”

Section: Distribution and Formation Of Crustal Componentsmentioning

confidence: 99%

Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China)

Yuan,

Chai,

Hou

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

The Sanjiang orogenic belt, located in southwestern China and the southeastern Tibetan Plateau, includes a variety of economically important metal deposits. Previous studies have focused on Lu-Hf isotopic mapping to suggest its lithospheric architecture and mineralization. In this study, we provide the results of Nd isotopic mapping and compare them with the results of Hf isotopic mapping based on the similarity of Sm-Nd and Lu-Hf isotope systems, which indicate three juvenile domains with high εNd(t) and young Nd model ages within the Eastern Qiangtang-Simao terrane, while presenting negative εNd(t) values over the entire horizon. The very negative εNd(t) and old Nd model ages found in the Tengchong-Baoshan terrane and Changning-Menglian suture suggest that these terranes are old and might be reworked. The Nd isotopic mapping of the Sanjiang orogenic belt also suggests a relationship between different lithospheric architectures and the locations of distinct ore deposits. Porphyry-skarn Cu–Mo–(Au) deposits occur in the juvenile crust, which has relatively high εNd(t) (−3.3–5.1) and young TDM ages, whereas skarn and hydrothermal vein-type W–Sn deposits and Pb‒Zn‒Cu‒Ag deposits are located in the low-εNd(t) area.

show abstract