Petrological and geochemical characteristics of Zhaibei granites in Nanling region, Southeast China: Implications for REE mineralization

Wang, Lize; Xu, Cheng; Zhao, Zheng; Song, Wenlei; Kynický, Jindřích

doi:10.1016/j.oregeorev.2014.04.004

Cited by 38 publications

(29 citation statements)

References 36 publications

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“…South‐eastern China records widespread Mesozoic magmatism that has significance for tectonism and metallogenesis in this region, meaning that it has been the focus of several previous studies (Chen & Jahn, ; Li & Li, ; Wang, Xu, et al, ; Wang, Xu, Zhang, Song, & Kynicky, ; Zhao, Jiang, et al, ; Zhao et al, ; Zhou & Li, ; Zhou et al, ). Although slab roll‐back and changing subduction angle (Zhou & Li, ), flat westward subduction (Li & Li, ), and ocean‐ridge subduction (Sun et al, ; Sun et al, ) models have been proposed for the magmatism in this region, Mao et al () suggested that Southern China also records post‐Indosinian multiplate interactions, and Wang et al () suggested that this region was influenced by Yanshanian multiplate interactions.…”

Section: Discussionmentioning

confidence: 99%

Petrogenesis of two stages of Cretaceous granites in south‐west Fujian Province: Implications for the tectonic transition of South‐east China

Zhao

Jiang

et al. 2018

Geological Journal

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Zircon U-Pb data indicate that Cretaceous magmatism in Fujian Province occurred in two pulses, with the Xiyang, Yangshan, Wuci, Dehua, Juzhou, and Xiandu plutons emplaced between 147 ± 1 and 126 ± 1 Ma and the Hutou and Guangqiao plutons emplaced at 109 ± 1 Ma. Combining these previously published ages with the new data obtained during this study indicates that the magmatism in the study area occurred in two distinct stages at 145-125 and 110-100 Ma, both have I-type characteristics. The earlier I-type granites are characterized by relatively high concentrations of SiO 2 (mean = 75.73 wt.%) and low concentrations of MgO (mean of 0.21 wt.%) and are metaluminous to weakly peraluminous (mean A/CNK = 1.03). They contain relatively high total rare-earth element (ΣREE) concentrations (mean of 139.3 ppm) with well-developed Eu anomalies and are relatively enriched in the large-ion lithophile elements (LILE) and the light REE (LREE) but depleted in Ba, Sr, P, Ti, Nb, and Ta. In contrast, the younger I-type granites contain lower concentrations of SiO 2 (mean of 67.63 wt.%), higher concentrations of MgO (mean of 1.47 wt.%), and are metaluminous to weakly peraluminous (mean A/CNK = 0.96). They also have moderate REE values (mean of 150.26 ppm) without significant Eu anomalies and are relatively enriched in LREE, Rb, Th, U, K, Sr, and Pb and depleted in Nb, Ta, P, Ti, Y, and Yb. The two-stage Nd model ages (T 2DM ) of Cretaceous granites are 1.46 to 1.88 Ga (mean of 1.57 Ga) and 1.16-1.60 Ga (mean of 1.36 Ga), respectively. The two-stage Hf model ages (T 2DM ) of Cretaceous gran-ites are 1.19-1.82 Ga (mean of 1.54 Ga) and 0.46-1.20 Ga (mean of 0.91 Ga), respectively. It is likely that the earlier I-type granites were derived from magmas generated by the partial melting of Mesoproterozoic metabasaltic material, whereas the later I-type granites were derived from magmas generated by partial melting of a mixed lithology containing Mesoproterozoic to Neoproterozoic metabasaltic to metatonalitic rocks that were underplated by medium-to high-K basaltic magmas. A geological comparison between south-western Fujian Province and adjacent areas indicates that the earlier I-type granites were emplaced in a compressional environment associated with the subduction of the paleo-Pacific Plate at 145-125 Ma. In contrast, the later I-type plutons are associated with intraplate extension accompanied by the post-subduction slab roll-back of the paleo-Pacific Plate. The two magmatic stages represent a transition from compressional to intraplate extensional tectonics between 125 and 110 Ma, with mantle-derived material playing a crucial role in the formation of the I-type granites.

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Section: Discussionmentioning

confidence: 99%

Petrogenesis of two stages of Cretaceous granites in south‐west Fujian Province: Implications for the tectonic transition of South‐east China

Zhao

Jiang

et al. 2018

Geological Journal

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“…Rare earth elements are mainly found in halides, carbonates, oxides, phosphates, and silicates (Liang et al, 2014). The geochemistry of REEs in different parent materials and their derived soils has been previously investigated due to their importance in explaining pedogenetic (Laveuf et al, 2012;Vermeire et al, 2016), petrogenetic (Peng et al, 2014;Wang et al, 2015), and geochemical processes (Duddy, 1980;Middelburg et al, 1988;Cao et al, 2016;Wang and Liang, 2016). Rare earth elements are economically important, especially in the high-technology industry (Dutta et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The global demand for REEs is increasing at a rate of 3.7-8.6% annually (Tan et al, 2015). Although few granitoids in the world can form economic REE ore, weathering crust derived from S-type granites can be important REE deposits, as observed in Nanling, Southeast China (Wang et al, 2015). S-type granites are formed from sedimentary protolith (or supracrustal material) (Chappell and White, 1984).…”

Section: Introductionmentioning

confidence: 99%

Rare earth element geochemistry during weathering of S‐type granites from dry to humid climates of Brazil

Silva

Nascimento

Biondi

et al. 2018

J. Plant Nutr. Soil Sci.

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S‐type granites are igneous rock types that are widespread in all continental crust. These granites play a key role in global weathering patterns and can be important economic ores of rare earth elements (REEs). This study provides insights into the geochemical and mineralogical signatures of REEs in S‐type granites and their derived soil profiles along a climosequence from dry to humid climates of Brazil. Mineralogical, petrographic, geochemical and soil analyses (physical and chemical) were used to evaluate the geochemistry of REEs in rock and soil samples. The granites were characterized as strongly peraluminous, being classified as typical S‐types. Both the granites and their derived soils contained high contents of REEs, with monazite and apatite being the major source of REEs. The high enrichment of light REEs (LRREs) in monazite and apatite explained the REE fractionation evidenced in the S‐type granites. The normalized REE distribution patterns for soil profiles along the climosequence revealed the fractionation between light and heavy REEs (HREEs). The ratio of La/YbN > 1 also confirmed the LREEs/HREEs fractionation. The mineralogical composition of the parent material and the clay minerals (kaolintes) seemed to govern the fractionation between LREEs and HREEs in these soils. Chemical index of alteration (CIA) values, REE fractionation and kaolinite proportions in soil profiles increased from dry to humid climates. These results suggest that the degree of weathering plays an important role in the type and volume of secondary minerals, as well as the REE fractionation. Among the phyllosilicates, kaolinite seems to be the most important adsorbent of light REE. The higher positive Eu anomalies with advanced weathering are explained by the breakdown of plagioclase. The weathering of monazite and apatite was the main reason for the slight negative Ce anomalies in the soil profiles. This study can be used to comprehend the geochemistry of REEs in other parts of the tropics underlain by S‐type granites.

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“…Southeast China is characterized by widespread Mesozoic igneous rocks, which have drawn a great deal of attention in recent decades because of their tectonic significance and related large-scale mineralization (Jahn et al, 1976;Chen and Jahn, 1998;Zhou and Li, 2000;Wang et al, 2006bWang et al, , 2011Zhou et al, 2012). Mesozoic granitoids which are distributed in Southeast China can be divided into 3 stages -Triassic, Jurassic and Cretaceous (M.F.…”

Section: Introductionmentioning

confidence: 99%

Compression between microcontinents in the Cathaysian Block during the early Yanshanian: petrogenesis of the Tangquan pluton in Southwest Fujian Province, Southeast China

Zhao

Mao

et al. 2016

Geological Journal

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Southeast China is characterized by widespread Mesozoic igneous rocks, which have drawn a great deal of attention in recent decades because of their tectonic significance and related large‐scale mineralization. Among these igneous rocks, The Tangquan pluton in Southwest Fujian Province is the only adakitic pluton that has been discovered within the Cathaysian Block. It is mainly composed of a central unit of granodiorite with peripheral granodioritic porphyries. Two medium‐grained granodiorite samples have zircon U‐Pb ages of 162.2 ± 2.0 Ma and 163.0 ± 1.4 Ma, indicating intrusion in Middle Jurassic times. Adakite‐like geochemical features of the pluton include high Sr/Y (46.7) and (La/Yb)N (25.5) values, and low Y (12.2 ppm) and Yb (1.04 ppm) abundances. All samples have low εNd(t) values (average −9.49) and high initial 87Sr/86Sr ratios (average 0.708242). These results suggest that the adakitic rocks were generated by partial melting in thickened crust. The Tangquan pluton probably formed during the extrusion collision of microcontinents within the Cathaysian Block related to subduction of the Pacific Plate, which caused crustal thickening and partial melting of Neoproterozoic crust with arc‐like magmatic characteristics. Because the extrusion collision occurred between microcontinents in an intraplate (Cathaysian Block) setting, the effects of the extrusion collision were not as strongly felt as those involved in the Jiangshan‐Shaoxing Fault along which numerous adakitic rocks were emplaced with related porphyry‐type copper deposits. Copyright © 2016 John Wiley & Sons, Ltd.

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Petrological and geochemical characteristics of Zhaibei granites in Nanling region, Southeast China: Implications for REE mineralization

Cited by 38 publications

References 36 publications

Petrogenesis of two stages of Cretaceous granites in south‐west Fujian Province: Implications for the tectonic transition of South‐east China

Petrogenesis of two stages of Cretaceous granites in south‐west Fujian Province: Implications for the tectonic transition of South‐east China

Rare earth element geochemistry during weathering of S‐type granites from dry to humid climates of Brazil

Compression between microcontinents in the Cathaysian Block during the early Yanshanian: petrogenesis of the Tangquan pluton in Southwest Fujian Province, Southeast China

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