Geochronology and Geochemistry of Li(Be)-Bearing Granitic Pegmatites from the Jiajika Superlarge Li-Polymetallic Deposit in Western Sichuan, China

Dai, Hongzhang; Denghong, Wang; Liu, Lijun; Yang, Yu; Dai, Jingjing

doi:10.1007/s12583-019-1011-9

Cited by 39 publications

(3 citation statements)

References 81 publications

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“…In view of hydromagnesite, a hydrous-hydroxyl carbonate mineral whose characteristic absorption is mainly in the short-wave infrared band, this paper uses the FieldSpec4 short-wave infrared spectrometer of the American Analytica Spectra Devices (ASD) company to determine hydromagnesite samples around Jiezecha Salt Lake. The ASD FieldSpec4 short-wave infrared spectrometer has two InGaAs detectors with a spectral resolution of up to 6 nm and sampling interval up to 1.1 nm and can obtain a continuous spectrum of determination range from 350-2500 nm [38] .…”

Section: End-member Extraction By Laboratory Spectral Measurementsmentioning

confidence: 99%

Hydromagnesite determination method based on Landsat8 and ZY1-02D data: A case study of the Jiezechaka Salt Lake in Tibet

Zhao,

Dai,

Zhao

et al. 2023

Preprint

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Hydromagnesite is a natural carbonate mineral that is widely distributed, but large sedimentary hydromagnesite deposits with industrial exploitation value are rare globally. In China, hydromagnesite is mainly distributed in the salt lake area of Qinghai-Tibet Plateau. Because of the harsh environment, it is difficult to use the traditional method to search for ore. Remote sensing technology has been successfully applied to research skarn, pegmatite lithium-beryllium, porphyry-epithermal, salt lake lithium, magmatic nickel-chromium, and orogenic gold deposits; however, research regarding remote sensing determination of hydromagnesite from salt lakes is lacking. We determined the mineral composition and content of hydromagnesite samples in the Jiezechaka area by X-ray diffraction (XRD), and the reflection spectral curve of the hydromagnesite samples was measured using an ASD FieldSpec4 short-wave infrared spectrometer. The analysis indicated three and seven absorption valleys with high and low absorption intensities, respectively, in the reflectance spectral curves of the hydromagnesite samples in the Jiezechaka area. Then, on this basis, we used Landsat8 OLI and ZY1-02D AHSI data, with the mixture tuned matched filtering (MTMF) method to extract hydromagnesite information around Jiezechaka Salt Lake in Tibet. A confusion matrix operation was used to compare the determination results of the two types of data. Among them, the overall accuracy of the extraction results based on Landsat8 data was > 67%, and the kappa coefficient was 0.668. The overall accuracy of the extraction results based on ZY1-02D data was > 72%, and the kappa coefficient was 0.743. Finally, using overlay analysis of the two kinds of data determination results, we concluded that hydromagnesite outcrops in the Jiezechaka area are mainly distributed in the northwestern and southeastern regions of the lake. This study provides a rapid assessment technique for measuring hydromagnesite information from salt lakes.

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Section: End-member Extraction By Laboratory Spectral Measurementsmentioning

confidence: 99%

Hydromagnesite determination method based on Landsat8 and ZY1-02D data: A case study of the Jiezechaka Salt Lake in Tibet

Zhao,

Dai,

Zhao

et al. 2023

Preprint

Self Cite

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“…Granitic pegmatite-type lithium deposits are the most important types of hard rocktype lithium deposits, which are dominant in China [4,5]. For hard rock lithium deposits, determining the processing characteristics of the ore and lithium-bearing minerals is an essential step in the development of a lithium resources.…”

Section: Introductionmentioning

confidence: 99%

Process Mineralogy Characteristics of Lijiagou Pegmatite Spodumene Deposit, Sichuan, China

Lai,

Chen,

Chen

et al. 2023

Minerals

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Ljiagou pegmatite spodumene deposit is part of the Ke’eryin ore-field in the central Songpan-Garze Fold Belt of Sichuan, China. After recent exploration and assessment, it has been established as a new super-large spodumene deposit. In order to determine the processing characteristics of the ore and assess its industrial value, based on detailed microscopic and hand specimen observations, this study employs various methods and techniques, including X-ray powder diffraction (XRD), electron probe microanalysis (EPMA), laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), chemical element analysis, chemical phase analysis and the mineral liberation analyzer system (MLA). The average grade of lithium ore is 0.86%, making it a low-grade ore with 84.1% of Li derived from spodumene. The Li grade decreases with increasing depth, and the samples from shallower depths are easier to dissociate. The spodumene exhibits a wide range of grain sizes and is highly heterogeneous, requiring multiple stages of grinding. Based on the liberation characteristics, it is recommended to grind the material to −0.075 mm before entering the final flotation process.

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“…However, some economically important lithium pegmatites, for example those in the Tin-Spodumene Belt, USA (Swanson 2012); the Central Iberian Zone of Spain and Portugal (Roda-Robles et al 2016); Mt. Cattlin, Australia (Sweetapple et al 2019); Jiajika, China (Dai et al 2019); and Goulamina, Mali (Wilde et al 2021), lack the classic concentric internal zonation described by Cameron et al (1949), Norton (1983), and London (2014). In recent years, there has been an increasing research focus on such pegmatites because of their importance for Li-Cs-Ta-Sn mineralization (Martins et al 2011, 2012, London 2018, Dai et al 2019, Ballouard et al 2020, Barros et al 2020, Simmons et al 2020.…”

Section: Introductionmentioning

confidence: 99%

The Magmatic–Hydrothermal Transition in Lithium Pegmatites: Petrographic and Geochemical Characteristics of Pegmatites from the Kamativi Area, Zimbabwe

Shaw

Goodenough

Deady

et al. 2022

The Canadian Mineralogist

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Lithium is a critical metal, vital for electrification of transport. Currently, around half the world's lithium is extracted from rare-metal pegmatites and understanding the genesis and evolution of these igneous rocks is therefore essential. This paper focuses on the pegmatites in the Kamativi region of Zimbabwe. A group of early pegmatites is distinguished from a late pegmatite suite which includes the ca. 1030 Ma Main Kamativi Pegmatite. Previously mined for tin, the mine tailings are now being investigated for lithium. Mineral-scale investigation of samples from the Main Kamativi Pegmatite has allowed recognition of a four-stage paragenesis: (1) an early magmatic assemblage dominated by quartz, alkali feldspar, spodumene (LiAlSi2O6) and montebrasite [LiAl(PO4)(OH, F)]; (2) partial alteration by widespread albitization, associated with growth of cassiterite and columbite group minerals; (3) irregular development of a quartz, muscovite, columbite group mineral assemblage; and (4) widespread low-temperature fluid-induced alteration of earlier phases to cookeite, sericite, analcime, and apatite. Whole-rock geochemistry indicates that the late pegmatites are enriched in Li, Cs, Ta, Sn, and Rb but depleted in Nb, Zr, Ba, Sr, and the rare earth elements relative to early pegmatites and country rock granitoids. A combination of field relationships and published dating indicates that the granitoids, and probably the early pegmatites, were emplaced toward the end of the ca. 2000 Ma Magondi Orogeny, whereas the late pegmatites are almost 1000 million years younger. The late pegmatites thus cannot be genetically related to the granitoids and are instead likely to have formed by partial melting of metasedimentary source rocks. The drivers for this melting may be related to crustal thickening along the northern margin of the Kalahari Craton during the assembly of Rodinia.

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Geochronology and Geochemistry of Li(Be)-Bearing Granitic Pegmatites from the Jiajika Superlarge Li-Polymetallic Deposit in Western Sichuan, China

Cited by 39 publications

References 81 publications

Hydromagnesite determination method based on Landsat8 and ZY1-02D data: A case study of the Jiezechaka Salt Lake in Tibet

Hydromagnesite determination method based on Landsat8 and ZY1-02D data: A case study of the Jiezechaka Salt Lake in Tibet

Process Mineralogy Characteristics of Lijiagou Pegmatite Spodumene Deposit, Sichuan, China

The Magmatic–Hydrothermal Transition in Lithium Pegmatites: Petrographic and Geochemical Characteristics of Pegmatites from the Kamativi Area, Zimbabwe

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