Velocity structure heterogeneity and tectonic motion in and around the Tan–Lu fault of China

Zhao, Zhao; Zhao, Zhidan; Xu, Jiren

doi:10.1016/j.jseaes.2012.05.019

Cited by 18 publications

(2 citation statements)

References 16 publications

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“…Despite ongoing controversy, it is now generally agreed that gold mineralization in the Jiaodong Terrane was related to a major period of transpression to transtension, with largely brittle deformation under a NNW–SSE principal stress orientation in the late Early Cretaceous (Deng et al, ; S. Li et al, ; Lu et al, ; L. Q. Yang, Deng, et al, ). The major lithospheric‐scale (L. Q. Yang, Deng, Wang, et al, ; Z. Zhao, Zhao, & Xu, ) strike‐slip structures active during this event were the NNE‐trending Tan‐Lu and NE‐NNE‐trending Wulian–Qingdao–Yantai faults (Figures and ).…”

Section: Regional Structural Controls On Gold Mineralizationmentioning

confidence: 92%

Regional structural control on the distribution of world‐class gold deposits: An overview from the Giant Jiaodong Gold Province, China

et al. 2018

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The Jiaodong gold province in northeastern China is the country's premier gold resource and globally one of the most important gold provinces. The late Early Cretaceous gold metallogeny in this belt remains an enigma as it is hosted in the Archean Jiaobei Terrane of the North China Block and, to a lesser extent, within the Palaeoproterozoic Sulu Terrane of the South China Block.The driving force for widespread Late Jurassic and Early Cretaceous granitic magmatism, the switchover from a compressional to extensional tectonic regime, and gold mineralization are considered to be a combination of plate subduction with lithospheric delamination and consequent asthenospheric upwelling. Although many aspects related to the genesis of the gold deposits in Jiaodong have been resolved, the spatial distribution of the world-class gold deposits in this belt, which is of vital importance to brownfields and greenfields exploration, has been poorly understood in terms of the structural evolution of the province. In the northwestern segment of the Jiaobei Terrane, the world-class gold deposits of Sanshandao in the west, through Jiaojia, to Linglong in the east define a broadly E-W corridor. This corridor links a series of east-verging jogs on ore-controlling NNE-trending oblique-slip faults that are subparallel to an lithospheric-scale Tan-Lu Fault to the west. There is cryptic evidence that these jogs line up in the E-W trend due to reactivation of Palaeoproterozoic to Mesozoic faults and folds that were part of the structural architecture of the terranes prior to the gold event. These jogs induced deviations in the local principal stresses relative to regional equivalent stresses, with resultant heterogeneous strain, increased rock permeability, and focussed ore-fluid ingress. Both disseminated/ microbreccia-stockwork and vein-type gold deposits formed in this corridor, with the former being predominant and the latter having a higher gold grade. In contrast, predominant vein-type gold deposits in the eastern segment of the Jiaobei and Sulu terranes tend to form N-S corridors.These vein-type ores may relate to rotational strain induced by movement on pairs of more linear NNE-trending faults with the same kinematic movement sense.

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Section: Regional Structural Controls On Gold Mineralizationmentioning

confidence: 92%

Regional structural control on the distribution of world‐class gold deposits: An overview from the Giant Jiaodong Gold Province, China

et al. 2018

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“…NNE-to NE-trending fault systems rigidly controlled most of the gold mineralization that is hosted in the Mesozoic granitoids in the Jiaobei uplift [9,26]. From west to east, these fault systems are the Sanshandao Fault, Jiaojia Fault, and Zhaoping Fault, which are considered to be second-order faults of the lithospheric-scale Tan-Lu Fault [48][49][50]. These NNE-to NE-trending fault systems mainly follow the contact boundary between Mesozoic granitoid rocks in the footwall and Precambrian metamorphic rocks in the hanging wall, and partially cut through the Mesozoic granitoids and Precambrian metamorphic rocks.…”

Section: Regional Geologymentioning

confidence: 99%

Geological and Geochemical Characteristics of the Archean Basement-Hosted Gold Deposit in Pinglidian, Jiaodong Peninsula, Eastern China: Constraints on Auriferous Quartz-Vein Exploration

Albert

Yun

et al. 2019

Minerals

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The gold deposits that are hosted in the Archean metamorphic rock, have yet to be explored beyond Pinglidian gold deposit in the northwestern Jiaodong Peninsula, eastern China. This kind of gold deposit differs from those that are hosted in Mesozoic granitoids, showing good potential for the prospecting of auriferous quartz-vein gold deposits controlled by the structures in greenfield Archean metamorphic rock. Pinglidian gold deposit is located in the hanging wall of the Jiaojia fault and consists of eight separated orebodies that are enveloped by altered rock in Archean biotite plagiogneiss. These orebodies and wall-rock alterations are strongly controlled by local structures that formed during the Mesozoic rotation and kink folding of the foliated and fissile Archean basement host. The major wall-rock alterations comprise sericitization, silicification, pyritization, and carbonation, which is up to 18 m in width and progressively increases in intensity towards the auriferous quartz vein. The visible gold is present as discrete native gold and electrum grains, which have basically filled in all manner of fractures or are adjacent to galena. We recognize two types of gold bearing quartz veins that are associated with mineral paragenetic sequences during hydrothermal alteration in the Pinglidian gold deposit. The petrological features and geochemical compositions in the reaction fronts of the alteration zone suggest variations in the physicochemical conditions during ore formation. These minerals in the wall rock, such as plagioclase, biotite, zircon, titanite, and magnetite, have been broken down to hydrothermal albite, sericite, and quartz in a K–Na–Al–Si–O–H system, and sulfides in a Fe–S–O–H system. The major and trace elements were calculated by the mass-balance method, showing gains during early alteration and losses during late alteration. The contents of K2O, Na2O, CaO, and LOI varied within the K–Na–Al–Si–O–H system during alteration, while Fe2O3 and MgO were relatively stable. Rare-earth elements (REE) changed from gains to losses alongside the breakdown of accessory minerals, such as large ion lithophile elements (LILE). The Sr and Ba contents exhibited high mobility during sericite-quartz alteration. Most of the low-mobility high-field strength elements (HFSE) were moderately depleted, except for Pb, which was extremely high in anomalous samples. The behavior of trans-transition elements (TRTE) was related to complicated sulfides in the Fe–S–O–H system and was constrained by the parameters of the mineral assemblages and geochemical compositions, temperature, pressure, pH, and fO2. These factors during ore formation that were associated with the extents and intensity of sulfide alteration and gold precipitation can be utilized to evaluate the potential size and scale of an ore-forming hydrothermal system, and is an effective exploration tool for widespread auriferous quartz veins in Archean metamorphic basements.

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Geochronological and sulfur isotopic evidence for the genesis of the post-magmatic, deeply sourced, and anomalously gold-rich Daliuhang orogenic deposit, Jiaodong, China

et al. 2019

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Velocity structure heterogeneity and tectonic motion in and around the Tan–Lu fault of China

Cited by 18 publications

References 16 publications

Regional structural control on the distribution of world‐class gold deposits: An overview from the Giant Jiaodong Gold Province, China

Regional structural control on the distribution of world‐class gold deposits: An overview from the Giant Jiaodong Gold Province, China

Geological and Geochemical Characteristics of the Archean Basement-Hosted Gold Deposit in Pinglidian, Jiaodong Peninsula, Eastern China: Constraints on Auriferous Quartz-Vein Exploration

Geochronological and sulfur isotopic evidence for the genesis of the post-magmatic, deeply sourced, and anomalously gold-rich Daliuhang orogenic deposit, Jiaodong, China

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