Rapid change from compression to extension in the North China Craton during the Early Cretaceous: Evidence from the Yunmengshan metamorphic core complex

Zhu, Guang; Chen, Yin; Jiang, Dazhi; Liu, Shangjun

doi:10.1016/j.tecto.2015.06.009

Cited by 110 publications

(58 citation statements)

References 100 publications

(182 reference statements)

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“…Previous studies have shown that the eastern NCC was subjected to intense extension, lithospheric thinning, and craton destruction in the Early Cretaceous (Davis et al, , ; Wu, Lin, et al, ; F. Q. Zhang, Dilek, et al, ; B. L. Zhang et al, ; G. Zhu et al, , , , G. Zhu, Jiang, et al, ; R. X. Zhu, Xu, et al, ). The Early Cretaceous basins around the YRFZ are a result of this regional extension (G. Zhu et al, , , G. Zhu, Jiang, et al, ). Normal faulting along the YRFZ controlled the development of rift basins (S. Z. Li, Liu, et al, ; J. L. Liu et al, ; Pei et al, ; X. F. Wang et al, ; Wu, Lin, et al, ; G. R. Zhang et al, ), including the Dandong, Gulouzi, Jianchanggou, Lujiangcun, Liangshui, and Ji'an basins (from southwest to northeast).…”

Section: Geological Settingmentioning

confidence: 99%

Strike‐Slip Motion Within the Yalu River Fault Zone, NE Asia: The Development of a Shear Continental Margin

et al. 2018

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The ca. 700-km long Yalu River Fault Zone (YRFZ) is a major component of the NE striking strike-slip fault system of the East Asia continental margin, which was active during the late Mesozoic. Despite its importance, the origin and timing of activity along the fault zone remain unclear. We present structural data that indicate that the NE striking YRFZ was initiated as a sinistral strike-slip fault zone. Ductile, brittle-ductile, and brittle structures are exposed along its length, with more ductile structures in the southwest. The shear belts and faults predominantly dip steeply to the southeast and have a minor reverse component of motion. Microstructures indicate deformation temperatures of~300°C-500°C for the ductile region and~200°C-300°C for the brittle-ductile region. Inversion of fault slip data measured from brittle faults indicates that the sinistral motion was a result of N-S compression. We present in situ zircon U-Pb dating results for deformed and undeformed igneous rocks sampled from the ductile shear belts, indicating that sinistral faulting occurred between 146 and 131 Ma. This result correlates with the timing of a regional N-S shortening event during the earliest Early Cretaceous. Our data, together with other published studies of this strike-slip fault system, suggest that the East Asia shear margin was initiated at the beginning of the Early Cretaceous with the synchronous formation of a series of NE to NNE striking sinistral faults. This brief transpressive event along the shear margin was a result of the rapid, oblique subduction of the Izanagi Plate along a NNE trending trench.

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Section: Geological Settingmentioning

confidence: 99%

Strike‐Slip Motion Within the Yalu River Fault Zone, NE Asia: The Development of a Shear Continental Margin

et al. 2018

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“…Following the calculation method proposed by [59,60], the principal stress orientations (σ 1 , σ 2 and σ 3 ) were inverted from the measured fault-slip datasets, using software SG2PS developed by [61]. From this technique we can constrain the principle extension direction (σ 3 ) recorded on the study faults, although it is still in debate [49]. All the average angular difference (ANG) between predicted and actual striations are less than 25 • , which suggests that the calculated stress orientations are reliable [62].…”

Section: Ductile Deformation Of the Mrmentioning

confidence: 99%

“…The regional ore-controlling structures in Jiaodong Peninsula are NE-NNE-striking shear zones developed in the Mesozoic granitoids or along the contact zone between Precambrian metamorphic basement and Mesozoic granitoids [15]. These shear zones are considered as the minor structures of Tan-Lu shear zone [48], and most of them went through the switch from late Jurassic transpression to early Cretaceous extension [15,49].Minerals 2019, 9, x FOR PEER REVIEW 3 of 23 subduction of the Pacific Plate and the upwelling of asthenosphere [41][42][43]. Mafic to felsic dykes are also commonly distributed in Jiaodong Peninsula, e.g., dolerite, lamprophyre, diorite (porphyry), granodiorite, granitic porphyries and syenite.…”

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confidence: 99%

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New Insight into the Genetic Mechanism of Shear Zone Type Gold Deposits from Muping-Rushan Metallogenic Belt (Jiaodong Peninsula of Eastern China)

et al. 2019

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Most gold deposits are genetically controlled by shear zones, which are called shear zone type gold deposits (SZTGD). A better understanding of kinematics of shear zones and its constraint on the ore-forming process is critical to reveal the genetic mechanism of the SZTGD and favorable to mineral exploration. By conducting detailed structural analysis including field and microscopic observations and electron backscatter diffraction (EBSD) and fractal dimension analysis in the Muping-Rushan shear zone (MR) as well as several gold deposits, the kinematic characteristics of the MR are well recognized and the metallogenic process of the SZTGD are discussed. The main conclusions are as follows: (1) petrology, geometry, kinematics, macro-and micro-structures imply that the MR has experienced a progressive shearing history exhumed via middle crust to subsurface level under the NW-SE extensional regime from late Jurassic to early Cretaceous; (2) in the MR, gold may precipitate both in the brittle fractures at middle crust level and brittle deformation part at shallow crust level during the stress-chemical process and (3) comparison of gold deposits between the MR and other areas show that the SZTGD has a uniform metallogenic mechanism, which is from (multi-stage) pluton emplacement, hydrothermal fluid action, shearing action, brittle fracturing, sudden reduction of fluid pressure, flash vaporization to (gold) mineralization.Minerals 2019, 9, 775 2 of 22 greenstone belt in west Australia and Jiaodong Peninsula in China [18][19][20]. A better understanding of the mineralization process in the SZTGD is indispensable to the evolution history of the Earth and gold exploration.Although previous studies about kinematics and dynamics of shear zones and the relationship between shear zones and gold mineralization have been made great progress [18,[21][22][23][24], there still have some questions remain further consideration. On one hand, field works show that most gold ores are localized in shear zones. Even in the same shear zone, the distribution of ore bodies is not homogenous for everywhere (such as Jiaodong Peninsula, see [15,25]). It is suggested from these facts that different parts in the same shear zone have different abilities to make gold precipitate. In addition, previous studies about the ore-host rock environment, gold-ore occurrence conditions, metallogenic characteristics, the nature and origin of ore-forming fluids and the deformation of ore-controlling shear zones show that magma activation, shearing activities, preferential fluid transportation and the gold remobilization and concentration, are as the same-order processes that act in cyclic synchronicity to generate gold mineralization [26]. Therefore, the consideration of the mineralization process from the whole geological process needs more attention. To unveil the genetic mechanism of SZTGD, the best way is to investigate widely local structures developed during gold mineralization covering as many deposits as possible to get enough data and make regional c...

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“…After ca. 135 Ma, the Izanagi (or Palaeo-Pacific) Plate underwent NE-directed subduction parallel to the Eurasian continental margin (Engebretson, Cox, & Gordon, 1985;Kimura, Takahashi, & Kono, 1990;Maruyama, Isozaki, Kimura, & Terabayashi, 1997), which is thought to have initiated or reactivated NE-striking left-lateral faults (e.g., the Tan-Lu Fault) in eastern China (Engebretson et al, 1985;Lee, 1999;Xu & Zhu, 1994;Yang, Tian, Bai, & Zhang, 2016;Zhang, Shi, & Dong, 2003;Zhu, Chen, Jiang, & Lin, 2015). This deduction is supported by the suggestion that the NNE-trending Tan-Lu fault zone over a strike length of more than 5,000 km yields muscovite Ar-Ar ages of 132.5 to 124.7 Ma (Zhu, Niu, Liu, Wang, & Song, 2002;Zhu, Song, Wang, Liu, & Xu, 2001).…”

Section: Geodynamic Significancementioning

confidence: 99%

Early Cretaceous granitic dykes in the western Dabie Orogen, China: Geochronology, petrogenesis, and tectonic implications

Zhu

Wang

et al. 2018

Geological Journal

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Whole‐rock major‐trace elemental, whole‐rock Sr–Nd, and zircon U–Pb–Hf isotopic analyses have been carried out on two suites of Early Cretaceous granitic dykes in the western Dabie Orogen (Central China) with the aim of addressing their petrogenesis and geodynamic significance. LA‐ICPMS zircon U–Pb dating reveals that the E‐W‐trending granitic dykes have emplacement ages of 133.9 ± 1.6 and 132.8 ± 1.0 Ma, while the NW‐trending granitic dykes have emplacement ages of 121.4 ± 0.9 and 120.5 ± 0.7 Ma. These rocks have high concentrations of SiO2 and K2O, belonging to the high‐K calc‐alkaline and shoshonitic series. They are metaluminous to peraluminous and are mainly fractionated I‐type granite. The E‐W‐trending granites have moderate initial 87Sr/86Sr ratios (0.70614 to 0.70878) and negative εNd(t) values varying from −16.2 to −17.2 with two‐stage Nd model ages of 2.20 to 2.43 Ga. They exhibit a narrow range of zircon εHf(t) values (−22.34 to −23.70) with two‐stage Hf model ages of 2.31 to 2.36 Ga. These isotopic signatures suggest a homogeneous crustal source without significant magma contamination or mixing. The NW‐trending granites have initial 87Sr/86Sr ratios ranging from 0.70774 to 0.71034 and negative εNd(t) values varying from −10.9 to −9.5 with two‐stage Nd model ages of 1.69 to 1.80 Ga. They yield variable zircon εHf(t) values of −17.06 to −0.39 with two‐stage Hf model ages of 1.07 to 1.99 Ga, implying heterogeneous crustal signatures with minor mantle materials involved. Combining the geological, geochemical, and isotopic evidences, the E‐W‐trending granitic dykes are considered to be derived from partial melting of crustal materials under normal thickness during a transitional period following the tectonic collapse, while the NW‐trending granitic dykes resulted from crust melting in an extensional setting, most likely induced by the asthenospheric upwelling. Our results support that the western Dabie Orogen could have experienced S‐N‐directed compression (pre. 133 Ma), S‐N‐directed extension (ca. 133 Ma), and general E‐W‐directed extension (ca. 120 Ma). We propose that the Dabie Orogen has experienced tectonic collapse of the thickened lower crust and also has been affected by the subduction of the Izanagi (or Palaeo‐Pacific) Plate during the Early Cretaceous.

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Rapid change from compression to extension in the North China Craton during the Early Cretaceous: Evidence from the Yunmengshan metamorphic core complex

Cited by 110 publications

References 100 publications

Strike‐Slip Motion Within the Yalu River Fault Zone, NE Asia: The Development of a Shear Continental Margin

Strike‐Slip Motion Within the Yalu River Fault Zone, NE Asia: The Development of a Shear Continental Margin

New Insight into the Genetic Mechanism of Shear Zone Type Gold Deposits from Muping-Rushan Metallogenic Belt (Jiaodong Peninsula of Eastern China)

Early Cretaceous granitic dykes in the western Dabie Orogen, China: Geochronology, petrogenesis, and tectonic implications

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