Geochronology, petrology, and lithium isotope geochemistry of the Bailongshan granite-pegmatite system, northern Tibet: Implications for the ore-forming potential of pegmatites

Zhou, Jian; Wang, Qiang; Xu, Yi‐Gang; Cempírek, Jan; Wang, He; Ma, Jun; Wei, Gangjian; Huang, Tong‐Yu; Zhu, Guanhong; Le, Zhang

doi:10.1016/j.chemgeo.2021.120484

Cited by 30 publications

(5 citation statements)

References 81 publications

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“…(a) Histograms and relative probability of mineralizing ages (only CGMs ages are plotted) of the Jiajika (blue, Hao et al, 2015; Zhu et al, 2023), Bailongshan (grey, Wang, Han, et al, 2020; Zhou, Wang, et al, 2021) and Chaqiabeishan (red, Liu, Wang, et al, 2022; Lv et al, 2023; Pan et al, 2021; Sun, Zhao, Mo, et al, 2023; this study) pegmatite lithium deposits. (b) Relative probability of Chaqiabeishan CGMs ages, with two age peaks of 241 and 216 Ma.…”

Section: Discussionmentioning

confidence: 99%

“…significantly controlled by regional major tectonic events (Li et al, 2019), the Chaqiabeishan pegmatites still show distinctly enriched ε Nd (t) values (À14.4 to À12.8) relative to those at Bailongshan and Jiajika (ε Nd (t) values: À11.9 to À8.9, Figure 9b). The magma source for the Bailongshan and Jiajika deposits is similar to that of the contemporaneous granites, while the pegmatite magma F I G U R E 9 (a) Histograms and relative probability of mineralizing ages (only CGMs ages are plotted) of the Jiajika (blue, Hao et al, 2015;Zhu et al, 2023), Bailongshan (grey, Wang, Han, et al, 2020;Zhou, Wang, et al, 2021) and Chaqiabeishan (red, Liu, Wang, et al, 2022;Lv et al, 2023;Pan et al, 2021;Sun, Zhao, Mo, et al, 2023;this source at Chaqiabeishan is more enriched compared with the contemporaneous granites (Figure 9b). This is a similar observation to that made for rare-metal pegmatites in the Altaids, which are related to a more evolved regional ancient crust, according to the 3D lithospheric compositional architecture of the Altaids defined by Nd-Hf isotopic contour maps (Wang et al, 2023).…”

Section: Geodynamic Implicationsmentioning

confidence: 99%

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Late Triassic lithium pegmatites in Northwest China: A response to continental collision during Paleo‐Tethys Ocean closure

Zhao,

Qin,

Evans

et al. 2024

Geological Journal

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Spodumene‐bearing pegmatite dyke swarms have recently been discovered in the Chaqiabeishan area, at the northeastern margin of the Qinghai‐Tibet Plateau in northwest China. In order to elucidate the connection between the Chaqiabeishan lithium pegmatites and Triassic magmatism and mineralization within the West Kunlun – Songpan ‐Garzê rare‐metal belt, this study presents new columbite‐group mineral and monazite U–Pb dating results, mineral chemistry, monazite in situ Nd isotope analyses and gamma‐ray spectrometric measurements. Magmatism and mineralization at Chaqiabeishan mainly occurred ca. 216 Ma, and the mineralized pegmatites (Mn‐rich columbite‐group minerals, highly evolved monazite compositions and high effective uranium contents in the gamma‐ray survey) were generated from the high degree of the fractional crystallization in a volatile‐rich granitic magma. The source material of the Chaqiabeishan lithium pegmatites (εNd(t) values from −14.4 to −12.8) was more enriched than that of other pegmatite‐type lithium deposits (Jiajika and Bailongshan) in the West Kunlun – Songpan – Garzê rare‐metal belt and is ascribed to melting of ancient crustal materials in the basement. These late‐Triassic mineralizing events were closely related to the collision‐related tectonic setting at the northeastern margin of the Tibetan‐Qinghai Plateau, a product of Paleo‐Tethys Ocean closure.

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Section: Discussionmentioning

confidence: 99%

Section: Geodynamic Implicationsmentioning

confidence: 99%

Late Triassic lithium pegmatites in Northwest China: A response to continental collision during Paleo‐Tethys Ocean closure

Zhao,

Qin,

Evans

et al. 2024

Geological Journal

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“…Several large-scale rare-metal mineralization belts have been discovered in China with distributions in the West Kunlun-Songpan-Ganzi orogenic belt, Tianshan orogenic belt, Altai orogenic belt, Qinling-Dabie orogenic belt, Himalaya orogenic belt, Sanjiang orogenic belt, Wuyi-Yunkai orogenic belt, and Jiangnan orogenic belt in recent years [8,9]. Extensive work has been carried out by previous researchers on the formation age of pegmatites [10][11][12][13][14][15][16][17], petrogenesis [18][19][20][21], mineralogical characteristics [22][23][24][25], magma evolution [26][27][28][29][30][31], ore-forming fluids [32][33][34], and genesis mechanisms of granitic pegmatites [35][36][37][38][39][40], which significantly enhanced the understanding of rare-metal pegmatites in China.…”

Section: Introductionmentioning

confidence: 99%

“…Tectonic collisions and continental accretion have led to a thickening of the crust in the region, creating conditions that favor the generation of significant magma volumes. Consequently, this has facilitated the formation of highly differentiated pegmatitic magmas [9,37,43]. In recent years, multiple survey results pointed out the significant rare-element mineralization potential in the area.…”

Section: Introductionmentioning

confidence: 99%

Geochronology and Geochemistry of Granitic Pegmatites from Tashidaban Li Deposit in the Central Altun Tagh, Northwest China

Kang,

Ma,

Zhang

et al. 2024

Minerals

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The Central Altun orogenic system is a result of the amalgamation of multiple micro-continental blocks and island arcs. This complex system originated from subduction–accretion–collision processes in the Proto-Tethys Ocean during the Early Paleozoic. Research has reported the discovery of several Li-Be granitic pegmatite deposits in the Central Altun Block, including the North Tugeman granitic pegmatite Li-Be deposit, Tugeman granitic pegmatite Be deposit, Tashisayi granitic pegmatite Li deposit, South Washixia granitic pegmatite Li deposit, and Tamuqie granitic pegmatite Li deposit. The Tashidaban granitic pegmatite Li deposit has been newly discovered along the northern margin of the Central Altun Block. Field and geochemical studies of the Tashidaban granitic pegmatite Li deposit indicate: (1) Spodumene pegmatites and elbaite pegmatites, as Li-bearing granitic pegmatites that form the Tashidaban granitic pegmatite Li deposit, intrude into the two-mica schist, and marble of the Muzisayi Formation of the Tashidaban Group. (2) Columbite–tantalite group minerals and zircon U-Pb dating results indicate that the mineralization age of Tashidaban Li granitic pegmatites is 450.2 ± 2.4 Ma with a superimposed magmatic event at around 418–422 Ma later. (3) Whole-rock geochemical results indicate that the Kumudaban rock sequence belongs to the S-type high-K to calc-alkaline granites and the Tashidaban Li granitic pegmatites originated from the extreme differentiation by fractional crystallization of the Kumdaban granite pluton.

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“…2020, Zhou et al . 2021). To the best of our knowledge, no Li isotope data of spodumene samples from the above four deposits have been published until now.…”

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confidence: 99%

Lithium Isotope Determination in Spodumene by fs‐LA‐MC‐ICP‐MS with Non‐Matrix‐Matched Calibration: Insights into ICP Operating Conditions and Data Evaluation

Tan,

Koch,

Günther

et al. 2023

Geostandard Geoanalytic Res

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Lithium isotope measurement in spodumene by femtosecond LA‐MC‐ICP‐MS was investigated and the influence of plasma operating conditions and data reduction strategy on accuracy and precision was studied. It was found that “hot” plasma conditions led to an unstable baseline signal and substantial variations in the Li isotope ratios. By adding a constant amount of water to the carrier gas, a stable baseline was achieved and isotope ratios became reproducible and were consistent with data from solution‐based MC‐ICP‐MS. The resulting biases were within ± 0.51‰ and the reproducibility was better than 0.09‰. Comparison of Li isotope ratios resulting from different data evaluation schemes showed that the mean of the transient intensity ratios, integration of the entire or a user‐defined period of the ion signals resulted in good agreement with solution‐based data, while linear regression underestimated the Li isotope ratios. It was also found that “cool” plasma operation produced a stable baseline signal, but the Li isotope results were biased by up to ‐4.3%, irrespective of water introduction and the data evaluation scheme. With the optimised “hot‐wet” conditions, the Li isotope ratios in eleven spodumene materials were determined which successfully allowed distinguishing regional deposits and partially veins of the available samples.

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Geochronology, petrology, and lithium isotope geochemistry of the Bailongshan granite-pegmatite system, northern Tibet: Implications for the ore-forming potential of pegmatites

Cited by 30 publications

References 81 publications

Late Triassic lithium pegmatites in Northwest China: A response to continental collision during Paleo‐Tethys Ocean closure

Late Triassic lithium pegmatites in Northwest China: A response to continental collision during Paleo‐Tethys Ocean closure

Geochronology and Geochemistry of Granitic Pegmatites from Tashidaban Li Deposit in the Central Altun Tagh, Northwest China

Lithium Isotope Determination in Spodumene by fs‐LA‐MC‐ICP‐MS with Non‐Matrix‐Matched Calibration: Insights into ICP Operating Conditions and Data Evaluation

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