| Reference Type | Journal (article/letter/editorial) |
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| Title | Tourmaline constraints on Li enrichment in the Huanglongling super-large pegmatite-type lithium deposit, Altyn Tagh, NW China |
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| Journal | Ore Geology Reviews |
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| Authors | Zhang, Song | Author |
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| Wang, He | Author |
| Liu, Jin-Heng | Author |
| Zhang, Xiao-Yu | Author |
| Huang, Liang | Author |
| Wang, Kun-Yu | Author |
| Du, Xiao-Fei | Author |
| Shen, Ming-Hong | Author |
| Cai, Ming-Ze | Author |
| Year | 2026 | Volume | < 191 > |
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| Page(s) | 107188 |
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| URL | |
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| DOI | doi:10.1016/j.oregeorev.2026.107188Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 19718666 | Long-form Identifier | mindat:1:5:19718666:6 |
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| GUID | 0 |
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| Full Reference | Zhang, Song; Wang, He; Liu, Jin-Heng; Zhang, Xiao-Yu; Huang, Liang; Wang, Kun-Yu; Du, Xiao-Fei; Shen, Ming-Hong; Cai, Ming-Ze (2026) Tourmaline constraints on Li enrichment in the Huanglongling super-large pegmatite-type lithium deposit, Altyn Tagh, NW China. Ore Geology Reviews, 191. 107188 doi:10.1016/j.oregeorev.2026.107188 |
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| Plain Text | Zhang, Song; Wang, He; Liu, Jin-Heng; Zhang, Xiao-Yu; Huang, Liang; Wang, Kun-Yu; Du, Xiao-Fei; Shen, Ming-Hong; Cai, Ming-Ze (2026) Tourmaline constraints on Li enrichment in the Huanglongling super-large pegmatite-type lithium deposit, Altyn Tagh, NW China. Ore Geology Reviews, 191. 107188 doi:10.1016/j.oregeorev.2026.107188 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | Lithium deposits are of increasing economic importance due to the surging global demand for energy storage materials. Fluids play a crucial role in rare-metal enrichment and in modulating the physical properties of granitic-pegmatitic systems. However, key uncertainties remain regarding when fluids exsolve from evolved melts, how Li and other metals partition between melt and fluid, and whether fluid exsolution and accumulation are required for Li enrichment. The Huanglongling deposit, Situated within the Central Altyn Block, represents a newly identified giant pegmatite-type Li deposit, offering an ideal site to explore the debated mechanisms of fluid evolution and Li enrichment. Integrated analyses of geochronology, Nd isotopes, and tourmaline geochemistry and boron isotopes (δ11B) were conducted to constrain the timing of magmatism-mineralization, as well as the magmatic-hydrothermal evolution. The muscovite granite (Monazite U-Pb age: 419.2 ± 1.3 Ma; εNd(t) = -7.8 to −7.4) and two-mica granite (Monazite U-Pb age: 413.1 ± 1.0 Ma; εNd(t) = -6.7 to −6.1) exhibit Nd isotopic compositions and emplacement ages comparable to those of the pegmatites (εNd(t) = -9.5 to −6.2), suggesting that they were derived from a common magma system. This magmatic system was generated by partial melting of the host strata (εNd(t) = -8.6 to −7.8). In contrast, the biotite granite (444.6 ± 1.7 Ma; εNd(t) = -4 to −2.6) originated from a relatively juvenile crustal source, which likely provided the thermal energy required to initiate crustal anatexis and subsequent magmatic evolution. The tourmaline compositions display a systematic evolution from dravite to schorl and finally to elbaite, with the most evolved compositions showing a trend toward the rossmanite. This compositional transition, together with progressive increases in YAl, (Li + Mn), and Li/Sr ratios indicates that fractional crystallization was the dominant process controlling the early-stage progressive Li enrichment (up to ∼ 6000 ppm). However, a significant increase in Li, Be, Nb, and Ta concentrations (with Li up to 10,000 ppm) occurs in the mineralized pegmatites. Meanwhile, the boron isotopic composition of the melts inferred from tourmaline shows a systematic evolution from the TMG-type (−10.65‰) to the MG-type (−13.23‰; reflecting fluid exsolution within the magma chamber), followed by the TUR-G/R-type (mean −12.31‰; accumulation of fluid), and finally to the PG-type (−11.39‰; continuous accumulation of fluid). This isotopic evolution reveals a progressive process of fluid exsolution, migration, and injection within the magmatic system, which collectively represents the key mechanism driving the extraordinary Li enrichment in the Huanglongling pegmatite system. In summary, we propose that the genesis of the Huanglongling Li deposit was governed by a coupled process of magmatic fractional crystallization and successive fluid exsolution-migration-injection. This model highlights the pivotal role of melt-fluid coupling in controlling rare-metal enrichment and provides new insights into the metallogenic processes of giant pegmatite-type Li deposits. |
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