Evolution and REE geochemistry of Huangsha-Tieshanlong ore-bearing granite |
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| Authors: | Xia Hongyuan Liang Shuyi |
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| Institution: | (1) Chengdu College of Geology, China |
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| Abstract: | Our studies show that the granite bodies (γ
5
2 − 1
and γ
5
3
) which constitute the Huangsha-Tieshanlong composite granitic intrusion in Jiangxi are characterized by their similarities
in mineral assemblage, petrochemistry, trace element and REE distribution pattern. The values of ΣREE, ΣLREE, ΣHREE, ΣCe/ΣY,
δEu and La/Yb apparently decrease from γ
5
2 − 1a
to γ
5
2 − 1b
, γ
5
3
and γ
5
3
. It is shown that the early Yenshanian W(Ta, Nb)-bearing granite (γ
5
2 − 1
) and late Yenshanian Ta, Nb-bearing granite (γ
5
3
) may have been derived from the differentiation and evolution of granitic magmas due to repeated remelting of the crust and
their earlier and later intrusion. Although the earlier (γ
5
2 − 1b
and later (γ
5
3
) albitized Ta, Nb-bearing granites show some obvious differences in REE content, their δEu values and La/Yb ratios are similar
to each other. Therefore, it may be concluded that the early and late Ta, Nb-bearing granites were derived from a congenetic
magma. |
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| Keywords: | |
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