Geochronology and geochemistry of the late Paleoproterozoic aluminous A-type granite in the Xiaoqinling area along the southern margin of the North China Craton: Petrogenesis and tectonic implications

Deng, Xiaoqin; Peng, Touping; Zhao, Taiping

doi:10.1016/j.precamres.2016.09.013

Cited by 65 publications

(24 citation statements)

References 108 publications

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“…As shown in Fig. 9, the zircon ε Hf (t) values and the whole-rock ε Nd (t) values of A-type granites at the southern NCC mostly plot in the evolution field of the Taihua Group, indicating that they were most likely derived from partial melting of basement rocks like those of the Taihua Group 12,[14][15][16]34 . The zircon ε Hf (t) values of the LWZ pluton vary between -6.4 and -1.1, and the Hf model ages fall within the range of 2.4-2.6 Ga 17,24 .…”

Section: Discussionmentioning

confidence: 92%

“…2). However, perthites, which form by high-temperature and low-pressure crystallization 15,37 , share similar features to A-type granite. The 10000Ga/Al ratios for the LWZ range from 4.10 to 7.28; these ratios are higher than the global average value (3.75) of A-type granites 18 .…”

Section: Discussionmentioning

confidence: 98%

“…With respect to the occurrence of mafic minerals, such as arfvedsonite, aegirine and augite, the LWZ pluton is similar to traditional A-type granites 47 . The metaluminous to weakly peraluminous character of the LWZ may be related to partial melting of tonalite and granodiorite with a plagioclase-rich residue at high temperature (950°C) at a shallow crustal level 15,16 . Widespread exposure of the basement rocks of the Taihua Group has been suggested as a potential source for the LWZ pluton 17,23 .…”

Section: Discussionmentioning

confidence: 99%

“…A substantial amount of late Paleoproterozoic to Mesoproterozoic magmatism also developed along the southern margin of the NCC, including mafic dyke swarms 3,4,11 , volcanic rocks 9,11 , and granite rocks 12,[15][16][17][22][23][24] . Notably, some of these rocks show an affinity to A-type granite (Fig.…”

Section: Geological Backgroundmentioning

confidence: 99%

“…1.6-Ga Longwangzhuang and Maping granites 17,[22][23][24]34 , and the ca. 1.53-Ga Zhangjiaping granite 15 . The majority of these granites intruded into the TTG gneiss basement or volcanic-sedimentary sequences.…”

Section: Geological Backgroundmentioning

confidence: 99%

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Geochemistry and tectonic significance of late Paleoproterozoic A-type granites along the southern margin of the North China Craton

Wang

Yang

Siebel

et al. 2020

Sci Rep

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The Longwangzhuang pluton is a typical example of Paleoproterozoic A-type granite intrusions at the southern margin of the North China Craton. This pluton is composed of arfvedsonite granite and minor aegirine-augite granites. Samples from both granite types display similar zircon U-Pb ages with 207 U-206 Pb ages of 1612 ± 19 Ma [mean square weighted deviation (MSWD) = 0.66] and 1609 ± 24 Ma (MSWD = 0.5), respectively. The granites exhibit similar high silica (SiO 2 = 71.1-73.4 wt.%), high alkaline (Na 2 o + K 2 o = 8.10-9.26 wt.%, K 2 o/na 2 o > 1), and low Al 2 o 3 (11.8-12.8 wt. %) contents and metaluminous to weakly peraluminous bulk chemistry. The chemical variations of the Longwangzhuang pluton suggest the effects of mineral fractionation. In addition, all samples show typical characteristics of A-type granites, such as high 10000Ga/Al ratios (4.10-7.28), high FeO tot /(FeO tot + MgO) ratios (0.88-0.99), and high Zr (484-1082 ppm), Ce (201-560 ppm), and Y (78-156 ppm) contents. The ε nd (t) values and the (206 pb/ 204 Pb) t , (207 pb/ 204 Pb) t , and (208 pb/ 204 Pb) t ratios of the arfvedsonite granite samples vary from −4.6 to-5.3, 15.021 to 17.349, 15.241 to 15.472, and 33.206 to 36.905, respectively, and those for the aegirine-augite granite sample amount at −0.2, 14.421, 15.175, and 33.706. The distinct and variable Nd and Pb isotope values indicate the presence of heterogeneous protoliths. Based on its geochemistry, its low initial Pb isotope ratios, and its enrichment in Nd isotopes, we infer that the Longwangzhuang A-type granite is the partial melting product of basement rocks such as the Taihua Group gneisses accompanied by some involvement of juvenile material from the mantle. Together with published data from other Paleoproterozoic A-type granite plutons exposed at the southern margin of the craton, our findings suggest that these granites had a similar origin. Furthermore, geochemically, they can be divided into two groups: A 2-type, which formed earlier (~1.8-1.6 Ga), and A 1-type, which formed later (~1.6-1.5 Ga). Combining this information with the variations in whole-rock Nd and zircon Hf isotopic composition at ca. 1.6 Ga, we propose that tectonic transformation from post-orogenic to anorogenic magmatism occurred at the southern margin of the North China Craton at that time.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Geological Backgroundmentioning

confidence: 99%

Section: Geological Backgroundmentioning

confidence: 99%

See 3 more Smart Citations

Geochemistry and tectonic significance of late Paleoproterozoic A-type granites along the southern margin of the North China Craton

Wang

Yang

Siebel

et al. 2020

Sci Rep

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A database of detrital zircon U–Pb ages in the North China Craton from the Paleoproterozoic to the early Palaeozoic

Dong,

Zuo,

Xiao

et al. 2023

Geoscience Data Journal

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U–Pb dating of detrital zircon is widely used in geology to identify the source of sediments and constrain palaeogeography and tectonic history. We collected the detrital zircon from the Paleoproterozoic to early Palaeozoic strata to understand the North China Craton's geological chronological characteristics. After screening and sorting out data information, we managed and analysed 84 papers from 2006 to 2022. Three hundred seventy‐nine samples comprising 29,431 pieces of U–Pb ages of detrital zircons gathered from the Proterozoic to Ordovician sedimentary rocks in North China Craton (NCC). Detrital zircons within five areas in the NCC, i. e., Xuhuai Basin, Zhaertai‐Bayan Obo‐Huade Basin, Yanliao Basin, Xiong'er Basin and Alxa Block, are discussed in detail. Meanwhile, we collected 2,588 pieces of Lu‐Hf detrital zircon data in the study. This Database can be helpful in understanding and explaining the tectonic evolution of the NCC from the Paleoproterozoic to the Early Palaeozoic.

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Multiphase magmatic overprinting in the Late Jurassic Laoniushan pluton at the SW margin of the North China Craton: Geochronological and petrogenetic constraints

et al. 2020

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Late Mesozoic granitoids are widely emplaced in the Qinling Orogen on the southern margin of North China Craton (NCC), and can provide important clues on the Late Mesozoic regional geodynamic setting. The Late Jurassic Laoniushan granitic pluton is located in the western end of the southern NCC margin. Zircon U-Pb dating for the granodiorite, quartz diorite, and biotite monzogranite of the pluton yielded 152.5 ± 1.6 Ma, 148.7 ± 1.2 Ma, and 149-146 Ma, respectively. Compilation of the single zircon ages revealed magmatic peaks at ca. 146, 152, and 163 Ma, suggesting multiphase Late Jurassic magmatism. These granitoids are high-K calc-alkaline, I-type, and metaluminous to weakly peraluminous. The rocks show chondrite-normalised LREE enrichments, HREE depletions and flat HREE patterns, together with (slightly) negative Eu, Nb, Ta, P, and Ti anomalies. The Laoniushan granodiorite and biotite monzogranite have similar REE patterns to the quartz diorite, but the former two have much smaller Eu anomalies than the latter. The negative zircon ε Hf (t) (−32.6 to −13.7), ε Nd (t) (−20.7 to −14.3) and crustal-like whole-rock trace-elemental ratios (e.g., Nb/Ta, Th/U, Nb/U, and Ce/Pb), together with the low Mg (MgO = 0.18-2.02 wt%, Mg # = 20-34), Cr (7.00-39.0 ppm), and Ni (0.80-4.00 ppm) contents, suggests that the Late Jurassic granitoids were probably derived from the partial melting of ancient crustal rocks with minor mantle-derived input. The granodiorite and quartz diorite have similar average ε Hf (t) (−26.5 and −26.7, respectively), ε Nd (t) (−20.5 and −20.2, respectively), T DM2 (Hf) (2880 and 2885 Ma, respectively) and T DM2 (Nd; 2607 and 2578 Ma, respectively), whereas the biotite monzogranite has higher average ε Hf (t) (−17.1) and ε Nd (t) (−15.3), and younger T DM2 (Hf) (2281 Ma) and T DM2 (Nd) (2176 Ma). This suggests that the biotite monzogranite has different magma sources and shallower magma formation depths compared to the granodiorite and quartz diorite. The latter two were likely formed by the partial melting of

show abstract

Geochronology and geochemistry of the late Paleoproterozoic aluminous A-type granite in the Xiaoqinling area along the southern margin of the North China Craton: Petrogenesis and tectonic implications

Cited by 65 publications

References 108 publications

Geochemistry and tectonic significance of late Paleoproterozoic A-type granites along the southern margin of the North China Craton

Geochemistry and tectonic significance of late Paleoproterozoic A-type granites along the southern margin of the North China Craton

A database of detrital zircon U–Pb ages in the North China Craton from the Paleoproterozoic to the early Palaeozoic

Multiphase magmatic overprinting in the Late Jurassic Laoniushan pluton at the SW margin of the North China Craton: Geochronological and petrogenetic constraints

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