The Wulian metamorphic core complex: A newly discovered metamorphic core complex along the Sulu orogenic belt, eastern China

Ni, Jianjun; Liu, Junlai; Tang, Xiaoling; Yang, Haibo; Xia, Zengming; Guo, Qizhong

doi:10.1007/s12583-013-0330-5

Cited by 51 publications

(23 citation statements)

References 42 publications

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“…1), scattered metamorphic core complexes (MCCs) (Davis et al, 2002;Liu et al, 2005;Mazukabzov et al, 2011;Wang et al, 2011;Ni et al, 2013;Fig. 1), and large-scale gold mineralization (Deng et al, 2003a(Deng et al, ,b, 2009Goldfarb and Santosh, 2014;Song et al, 2015;Fig.…”

Section: Introductionmentioning

confidence: 99%

Thermochronologic constraints on evolution of the Linglong Metamorphic Core Complex and implications for gold mineralization: A case study from the Xiadian gold deposit, Jiaodong Peninsula, eastern China

Deng

Wang

et al. 2016

Ore Geology Reviews

103

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Section: Introductionmentioning

confidence: 99%

Thermochronologic constraints on evolution of the Linglong Metamorphic Core Complex and implications for gold mineralization: A case study from the Xiadian gold deposit, Jiaodong Peninsula, eastern China

Deng

Wang

et al. 2016

Ore Geology Reviews

103

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“…Mylonite often displays different combinations of deformed minerals with different deformation conditions. Temperature affects the predominant types of slip systems, thus affecting the preferred orientations of crystal axes (Ni et al, , 2016). Thus, we can back calculate the deformation temperature based on the deformation minerals or the preferred orientations of crystal axes (Simpson, ).…”

Section: Discussionmentioning

confidence: 99%

“…6.2 | The deformation temperature of the Hetai DSZ Mylonite often displays different combinations of deformed minerals with different deformation conditions. Temperature affects the predominant types of slip systems, thus affecting the preferred orientations of crystal axes (Ni et al, 2013(Ni et al, , 2016. Thus, we can Note.…”

Section: Chronologymentioning

confidence: 98%

Ductile shear deformation and gold mineralization in the Hetai goldfield of the Yunkai Massif, South China Block

Liu

Wang

et al. 2019

Geological Journal

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The Hetai goldfield, located at the northern edge of the Yunkai Massif in South China, is a significant gold deposit hosted within the Hetai ductile shear zone (HSZ). The deformation history of HSZ and its correlation with the gold mineralization are problematic. In this study, we conducted detailed field observations and microstructure analyses together with zircon U–Pb and muscovite 40Ar/39Ar geochronology on mylonitic granites, aiming to study the deformation features and processes of the ductile shear zone (DSZ) along with their further implications to the gold metallogenic mechanisms of the Hetai goldfield (HGF). The HGF and its periphery have undergone three phases of ductile shear event (DS) since the Palaeozoic: The first DS developed from 468 to 413 Ma, with deformation temperatures above 500°C, accompanied by the formation of large‐scale migmatite and magmatism. The second DS developed from 239 to 211 Ma, with deformation temperatures ranging from 400°C to 500°C and resulted in a low‐angle, top‐to‐the‐SE thrusting. The third DS developed from 198 to 162 Ma, with deformation temperatures between 300°C and 400°C and formed steep, dextral strike‐slip shear zones. The DSs in the HGF have close connection with the gold mineralization. The first DS is coeval with the small‐scale gold mineralization or sulfofication and laid the foundation for later large‐scale gold mineralization. The second DS had no obvious gold mineralization, but the DSZ that developed in this period, together with the earlier DSZs, may have provided a migration pathway for the later gold ore‐forming fluid. Occurrence of the third DS was combined with the main gold mineralization, but the large‐scale gold mineralization mainly occurred during 175–157 Ma, that is, the middle and later periods of dextral strike‐slip. Overall, multiphase DS dominated the large‐scale gold mineralization in this area.

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“…It has been widely proposed that NCC has undergone large-scale lithosphere thinning in the extensional regime since late Mesozoic [29,67,79]. A series of NE-NNE-striking detachment shear zones and MCCs have been identified in Jiaodong Peninsula during this period, e.g., the Linglong MCC [80], the Wulian MCC [81], the Queshan MCC [67] and the Kunyushan MCC [15]. In this study, the MR was located at the western part the Kunyushan MCC (Figure 1b).…”

Section: Geological Characteristics Of the Mrmentioning

confidence: 99%

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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The Wulian metamorphic core complex: A newly discovered metamorphic core complex along the Sulu orogenic belt, eastern China

Cited by 51 publications

References 42 publications

Thermochronologic constraints on evolution of the Linglong Metamorphic Core Complex and implications for gold mineralization: A case study from the Xiadian gold deposit, Jiaodong Peninsula, eastern China

Thermochronologic constraints on evolution of the Linglong Metamorphic Core Complex and implications for gold mineralization: A case study from the Xiadian gold deposit, Jiaodong Peninsula, eastern China

Ductile shear deformation and gold mineralization in the Hetai goldfield of the Yunkai Massif, South China Block

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

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