scholarly journals Leaching behavior of Li and Ga from granitic rocks and sorption on kaolinite: Implications for their enrichment in the Jungar Coalfield, North China

China Geology ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 1-13
Author(s):  
Bang-jun Liu ◽  
◽  
Guang-chen Chu ◽  
Cun-liang Zhao ◽  
Yu-zhuang Sun ◽  
...  
Keyword(s):  
North China ◽  
Granitic Rocks ◽  
Leaching Behavior ◽  
Jungar Coalfield

Leaching Behavior of Heavy Metals from the Coal Gangue under the Impact of Site Ordovician Limestone Karst Water from Closed Shandong Coal Mines, North China

2019 ◽  
Vol 33 (10) ◽  
pp. 10016-10028 ◽  
Author(s):  
Dongjing Xu ◽  
Longqing Shi ◽  
Xingyue Qu ◽  
Jinjin Tian ◽  
Ke Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
North China ◽  
Coal Mines ◽  
Coal Gangue ◽  
Karst Water ◽  
Leaching Behavior ◽  
Ordovician Limestone ◽  
The Impact

Structural characteristics and LA–ICP-MS U–Pb zircon geochronology of the deformed granitic rocks from the Mesozoic Xingcheng-Taili ductile shear zone in the North China Craton

2015 ◽  
Vol 650 ◽  
pp. 80-103 ◽  
Author(s):  
Chenyue Liang ◽  
Yongjiang Liu ◽  
Franz Neubauer ◽  
Wei Jin ◽  
Zuoxun Zeng ◽  
...  
Keyword(s):  
Shear Zone ◽  
North China Craton ◽  
North China ◽  
Structural Characteristics ◽  
Granitic Rocks ◽  
Zircon Geochronology ◽  
Ductile Shear Zone ◽  
The North ◽  
Icp Ms ◽  
Ductile Shear

Late Jurassic, high Ba–Sr Linglong granites in the Jiaodong Peninsula, East China: lower crustal melting products in the eastern North China Craton

2017 ◽  
Vol 155 (5) ◽  
pp. 1040-1062 ◽  
Author(s):  
LI-QIANG YANG ◽  
YILDIRIM DILEK ◽  
ZHONG-LIANG WANG ◽  
ROBERTO F. WEINBERG ◽  
YUE LIU
Keyword(s):  
North China Craton ◽  
Late Jurassic ◽  
North China ◽  
Eastern China ◽  
Ultrahigh Pressure ◽  
Granitic Rocks ◽  
Crustal Melting ◽  
Heavy Rare Earth Element ◽  
The North ◽  
Lower Crustal

AbstractThe Jurassic Linglong granites, intrusive into the North China Craton (NCC) in eastern China, provide a critical record of the first major episode of lithospheric-scale extension and magmatism in NE China during Mesozoic time. Our U–Pb zircon dating reveals that the Linglong granites were emplaced during 161–158 Ma, shortly after the inception of a shallow subduction of the Palaeo-Pacific plate beneath East Asia during Middle Jurassic time. These granites have high alkali contents (K2O + Na2O = 8–9 wt%), low MgO and Mg no. values and variable Cr–Ni abundances. Their relatively high Ba and Sr concentrations, relatively low heavy rare Earth element (HREE) and strongly fractionated REE patterns characterize them as high Ba–Sr granites. The negative whole-rock εNd(t) values ranging from −22.4 to −10.9 and wide-ranging zircon εHf(t) values of −39.1 to −1.5 suggest that magmas of the Linglong granites were produced by partial melting of a garnet-amphibolite-bearing lower crust of the Jiaobei Terrane and by re-melting of the Triassic ultrahigh-pressure (UHP) metamorphic rocks and alkaline suites of the Sulu Terrane. The occurrence in the granitic rocks of inherited zircons of the Neoarchaean, Palaeoproterozoic, Neoproterozoic, Palaeozoic and Triassic ages suggests that magmas of the Linglong granites interacted with the ancient crust in these terranes during their ascent. Asthenospheric upwelling, induced by the steepening and rapid rollback of the Palaeo-Pacific slab during Late Jurassic time, provided the heat source for the inferred lower crustal melting. Trench migration and thermal weakening of the crust caused extensional deformation and thinning in the eastern part of the NCC.

Early Permian East-Ujimqin mafic–ultramafic and granitic rocks from the Xing’an–Mongolian Orogenic Belt, North China: Origin, chronology, and tectonic implications

2014 ◽  
Vol 96 ◽  
pp. 361-373 ◽  
Author(s):  
Yinhang Cheng ◽  
Xuejian Teng ◽  
Yanfeng Li ◽  
Min Li ◽  
Tianfu Zhang
Keyword(s):  
North China ◽  
Orogenic Belt ◽  
Granitic Rocks ◽  
Early Permian ◽  
Tectonic Implications

Numerical modeling of mullions in the Taili high deformation zone, North China: Implications for the rheology of granitic rocks

2017 ◽  
Vol 139 ◽  
pp. 6-14 ◽  
Author(s):  
Zhiyong Li ◽  
Zuoxun Zeng ◽  
Adil S. Mohammed
Keyword(s):  
Numerical Modeling ◽  
Deformation Zone ◽  
North China ◽  
Granitic Rocks ◽  
High Deformation

Genesis of Kaolinite Deposits in Jungar Coalfield, North China: Petrological, Mineralogical and Geochemical Evidence

2020 ◽  
Author(s):  
Linsong LIU ◽  
Tongjun ZHANG ◽  
Jianping LIU ◽  
Qinfu LIU ◽  
Kuo LI ◽  
...  
Keyword(s):  
North China ◽  
Geochemical Evidence ◽  
Jungar Coalfield

A Palaeoproterozoic basement beneath the Rangnim Massif revealed by the in situ U–Pb ages and Hf isotopes of xenocrystic zircons from Triassic kimberlites of North Korea

2019 ◽  
Vol 156 (10) ◽  
pp. 1657-1667 ◽  
Author(s):  
Yu-Sheng Zhu ◽  
Jin-Hui Yang ◽  
Hao Wang ◽  
Fu-Yuan Wu
Keyword(s):  
North China Craton ◽  
North Korea ◽  
North China ◽  
Hf Isotope ◽  
Granitic Rocks ◽  
Crustal Evolution ◽  
The North ◽  
Deep Crust ◽  
Crustal Reworking

AbstractIn situ U–Pb and Hf analyses were used for crustal zircon xenocrysts from Triassic kimberlites exposed in the Rangnim Massif of North Korea to identify components of the basement hidden in the deep crust of the Rangnim Massif and to clarify the crustal evolution of the massif. The U–Pb age spectrum of the zircons has a prominent population at 1.9–1.8 Ga and a lack of Archaean ages. The data indicate that the deep crust and basement beneath the Rangnim Massif are predominantly of Palaeoproterozoic age, consistent with the ages of widely exposed Palaeoproterozoic granitic rocks. In situ zircon Hf isotope data show that most of the Palaeoproterozoic zircon xenocrysts have negative ϵHf(t) values (−9.7 to +0.7) with an average Hf model age of 2.86 ± 0.02 Ga (2σ), which suggests that the Palaeoproterozoic basement was not juvenile but derived from the reworking of Archaean rocks. Considering the existence of Archaean remanent material in the Rangnim Massif and their juvenile features, a strong crustal reworking event is indicated at 1.9–1.8 Ga, during which time the pre-existing Archaean basement was exhausted and replaced by a newly formed Palaeoproterozoic basement. These features suggest that the Rangnim Massif constitutes the eastern extension of the Palaeoproterozoic Liao–Ji Belt of the North China Craton instead of the Archaean Liaonan Block as previously thought. A huge Palaeoproterozoic orogen may exist in the eastern margin of the Sino-Korean Craton.

Palaeoproterozoic metasedimentary rocks of the Ji'an Group and their significance for the tectonic evolution of the northern segment of the Jiao–Liao–Ji Belt, North China Craton

2017 ◽  
Vol 155 (1) ◽  
pp. 149-173 ◽  
Author(s):  
EN MENG ◽  
CHAO-YANG WANG ◽  
ZHUANG LI ◽  
YAN-GUANG LI ◽  
HONG YANG ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Tectonic Setting ◽  
Active Continental Margin ◽  
Volcanic Rocks ◽  
Granitic Rocks ◽  
Geochemical Data ◽  
Metasedimentary Rocks ◽  
The North ◽  
Northern Segment

AbstractIn this paper we present new petrological and whole-rock geochemical data for the Palaeoproterozoic metasedimentary rocks in the upper part of the Ji'an Group within the Jiao–Liao–Ji Belt, China, as well as zircon U–Pb age dates andin situLu–Hf isotope data. The new data improve our understanding of the original nature of the metasedimentary rocks, further providing insights into their tectonic setting and the evolutionary history of the northern segment of the Jiao–Liao–Ji Belt. The zircons can be divided into two groups, viz., one of magmatic origin and the other of metamorphic origin. Zircon U–Pb dating gave mean or statistical peak ages for the magmatic zircons at 2035, 2082, 2178, 2343–2421, 2451–2545, 2643–2814 and 2923–3446 Ma, and mean peak ages for the metamorphic zircons at 1855 and 1912 Ma, which indicate a maximum depositional age of 2.03 Ga and two-stage metamorphic events atc. 1.91 and 1.85 Ga for the metasedimentary rocks. Geochemical data show that (1) the protoliths of these rocks were mainly sandstones, greywackes and claystones, together with some shales; (2) the main sources of the sedimentary material were Palaeoproterozoic granites and acid volcanic rocks, with minor contributions from Archaean granitic rocks; and (3) the sediments were deposited in an active continental margin setting. Moreover, along the northeastern margin of the Eastern Block of the North China Craton there is evidence of ancient crustal materials as old as 3.76 Ga, and multiple crustal growth events at 3.23–3.05, 2.80–2.65, 2.54–2.45 and 2.28–2.08 Ga.

The Tongkuangyu Cu Deposit, Trans-North China Orogen: A Metamorphosed Paleoproterozoic Porphyry Cu Deposit

2020 ◽  
Vol 115 (1) ◽  
pp. 51-77
Author(s):  
Xuyang Meng ◽  
Jeremy Richards ◽  
Jingwen Mao ◽  
Huishou Ye ◽  
S. Andrew DuFrane ◽  
...  
Keyword(s):  
North China ◽  
Porphyry Copper ◽  
Volcanic Rocks ◽  
Copper Deposit ◽  
Granitic Rocks ◽  
Weighted Mean ◽  
Porphyry Cu ◽  
Copper Mineralization ◽  
Biotite Schist ◽  
Granodiorite Porphyry

Abstract The Tongkuangyu copper deposit in the Zhongtiaoshan region, southern Trans-North China orogen, is hosted by a poorly constrained sequence of Paleoproterozoic volcano-sedimentary (quartz-sericite schist and biotite schist) and granitic rocks that have been metamorphosed to lower greenschist facies and variably deformed. The deposit has previously been proposed to be either a porphyry-type or a sediment-hosted stratiform Cu deposit, and its age of formation has been debated. The quartz-sericite schist is interpreted to be a felsic crystal tuff and consists of angular quartz crystals in a fine-grained sericite-altered matrix. Two quartz-sericite schist samples yielded zircon U-Pb upper concordia intercept ages of 2512 ± 12 (2σ, mean square of weighted deviates [MSWD] = 0.19) and 2335 ± 16 Ma (2σ, MSWD = 0.80). Biotite schist, which is interleaved locally with the quartz-sericite schist and is interpreted to be a basaltic-andesitic sill, yielded a younger zircon U-Pb upper concordia intercept age of 2191 ± 10 Ma (2σ, MSWD = 1.7). Five samples of granodiorite and granodiorite porphyry that intruded the schist sequence yielded similar zircon U-Pb ages, with a weighted mean upper concordia intercept age of 2182 ± 7 Ma (2σ, MSWD = 1.3). These results suggest that the volcanic sequence was deposited between ∼2.5 and 2.3 Ga and was intruded by basaltic-andesitic sills and a suite of granodiorite and granodiorite porphyry intrusions at ∼2.19 to 2.18 Ga. Two stages of copper mineralization are interpreted to have formed after pervasive sericite alteration of the felsic volcanic rocks. Stage 1 mineralization includes disseminated and deformed quartz veinlets containing chalcopyrite ± pyrite ± magnetite ± molybdenite associated with biotite ± K-feldspar alteration in granodiorite porphyry and schist. Stage 2 comprises undeformed quartz-chlorite-carbonate veins with bornite ± chalcopyrite ± magnetite associated with local chlorite and silicic alteration. Allanite crystals intergrown with chalcopyrite in the granodiorite porphyry yielded an approximate concordia U-Pb age of 2115 ± 31 Ma (2σ, MSWD = 2.3). Two molybdenite samples in a deformed quartz-chalcopyrite-molybdenite vein yielded Re-Os model ages of 2106 ± 9 and 2089 ± 9 Ma (2σ), consistent with previously published results. Hydrothermal monazite grains with Cu-Fe sulfide inclusions in the granodiorite porphyry, quartz-sericite schist, and undeformed chlorite-bornite-quartz veins yielded much younger U-Pb upper concordia intercept ages of 1832 ± 16 (2σ, MSWD = 0.48), 1810 ± 14 (2σ, MSWD = 0.92), and 1809 ± 12 Ma (2σ, MSWD = 0.38), respectively. The results are in agreement with four Re-Os model ages for pyrite mineral separates from undeformed quartz-sulfide veins, which yielded a weighted mean age of 1807 ± 4 Ma (2σ, n = 4, MSWD = 0.42). In contrast, hydrothermal rutile crystals in the quartz-sericite schist and biotite schist yielded a range of roughly concordant ages between 2.1 and 1.8 Ga, reflecting isotopic disturbance. We interpret these results to indicate original copper mineralization at ∼2.1 Ga that is significantly later than the granodiorite (∼2.18 Ga) and schists (∼2.5–2.2 Ga), followed by hydrothermal remobilization and metamorphism at ∼1.8 Ga. The metavolcanic and granodiorite porphyry host rocks, alteration styles, and disseminated and veinlet form of the earlier mineralization are strongly reminiscent of porphyry Cu deposits, and ages of ∼2.1 Ga have been reported for one intrusion and three volcanic rock samples from the district. The Tongkuangyu, therefore, represents one of the oldest known porphyry copper deposits. Remobilization of copper occurred at ∼1.8 Ga during the Zhongtiao orogeny.

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