Deep kimberlite prospecting and thrust-nappe structure: Analysis of diamond metallogenic belt in Wafangdian, China

Structural and geochronological constraints for the Mesozoic nappe structures of the Taqian–Fuchun thrust zone, eastern Jiangnan orogenic belt, South China

“…The Neoproterozoic and Upper Paleozoic-Mesozoic strata crop out in the TFTZ (Figure 3). The Neoproterozoic Shuangqiaoshan Group, consisting of phyllite, sericite slate, metamorphic silt-fine sandstone and volcanic tuff, widely crops out in the study area and is regarded as the metamorphic basement (Chen et al, 2016) The faults are the main structures in TFTZ and constitute the basic structural framework of the region (Huo et al, 2018;Yang et al, 2015;Zhong, 1992;Zhu et al, 1987). According to the striking, the faults can be divided into three groups: (1) northeast (NE), ( 2) northwest (NW), and…”

“…The Taqian-Fuchun thrust zone (TFTZ) in north-east Jiangxi province is located in the eastern JNOB and eastern part of the Pingxiang-Leping complex nappe system (Figures 1 and 2; Zhong, 1992). Multi-phase compressional and extensional structures have been widely developed in TFTZ due to the tectonic transformation of the SCB since the Mesozoic (Yu et al, 2011(Yu et al, , 2020, resulting in the special spatial superimposition between sedimentary strata from the Late Paleozoic to Early Mesozoic and metamorphic rock series, as well as the widespread Late Mesozoic extensional sedimentary basins and magmatism.…”

“…Multi-phase compressional and extensional structures have been widely developed in TFTZ due to the tectonic transformation of the SCB since the Mesozoic (Yu et al, 2011(Yu et al, , 2020, resulting in the special spatial superimposition between sedimentary strata from the Late Paleozoic to Early Mesozoic and metamorphic rock series, as well as the widespread Late Mesozoic extensional sedimentary basins and magmatism. The strata in TFTZ are characterized by the Late Paleozoic to Triassic strata exposed in narrow belts among widely distributed metamorphic rock series (Figure 3; Zhong, 1992) and constitute a particular structural landscape in north-east Jiangxi Province (Huo et al, 2018;Yang et al, 2015). Furthermore, the recently discovered Zhuxi W-Cu deposit is located in the centre of the TFTZ (Chen et al, 2012(Chen et al, , 2016He et al, 2022;Pan et al, 2017Pan et al, , 2018Song et al, 2021;Zhang et al, 2021).…”

“…The Mesozoic intracontinental deformation and tectonic evolution of the JNOB have been widely concerned. The Mesozoic nappe structures were widely used to explain the distribution of the widely exposed Neoproterozoic basement rocks and banded Late Paleozoic–Mesozoic sedimentary strata in the JNOB (Du, 1998; Hsü et al, 1988; Song et al, 2003; Wu, 1990; Xu et al, 1987; Yan et al, 2003; Yu et al, 2020; Zhong, 1992; Zhu et al, 1987). However, the geometry, kinematics and ages of the nappe structures remain poorly constrained and are essential for understanding the Mesozoic deformation and tectonic evolution of the JNOB.…”

“…However, the geometry, kinematics and ages of the nappe structures remain poorly constrained and are essential for understanding the Mesozoic deformation and tectonic evolution of the JNOB. With the in‐depth study of the nappe structures in north‐east Jiangxi and north‐west Zhejiang, the basement thrust imbricate type (Zhong, 1992), basin‐range ramp type (Zhong, 1992), duplexes (Huo et al, 2018) and large‐scale low‐angle nappes (Hsü et al, 1988; Song et al, 2003) have been proposed in the eastern JNOB. The understanding of the banded Late Paleozoic–Mesozoic strata mainly include fault‐limited clips (Shu et al, 1994; Zhong, 1992; Zhu et al, 1987) and huge tectonic window (Xu et al, 1987; Hsü et al, 1988; Song et al, 2003).…”