Mesozoic gold mineralization in Hainan Province of South China: Genetic types, geological characteristics and geodynamic settings

Xu, Deru; Wang, Zhilin; Wu, Chuanjun; Zhou, Yueqiang; Shan, Qiang; Hou, Maozhou; Fu, Yangrong; Zhang, Xiaowen

doi:10.1016/j.jseaes.2016.09.004

Cited by 28 publications

(33 citation statements)

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“…1.8 -1.45 Ga); [16], Meso-Neoproterozoic Shilu Group (ca. 1075 -880 Ma); [19] and Neoproterozoic-Sinian Shihuiding Formation [12]. The Baoban Group predominantly distributed in the central Hainan Province, is composed of migmatitic gneisses, black shales, plagioclase-amphibole gneisses, and quartz-muscovite schists with amphibolite to granulite facies metamorphism [9,20].…”

Section: Regional Geologymentioning

confidence: 99%

“…It is noteworthy to mention that all the Precambrian metasediments are characterized with high contents of CM, up to volumetrically >10%, and it is hosted in the black shales, slates and carbonaceous shales, carbonaceous phyllites and carbonaceous mudstones [12,16,17]. These carbonaceous rocks commonly occur over many tens of kilometers rock band in the central Hainan Province [23].Previous research indicates that CM is likely to be generated by metamorphism during Caledonian period, and soured from Precambrian [24].…”

Section: Regional Geologymentioning

confidence: 99%

“…The Quaternary loose sediments are mainly composed of unconsolidated sediments of sand [25]. CMbearing rocks are quite common within the Baoban and Shilu groups in the Bumo deposit, such as carbonaceous phyllites, carbonaceous mudstones and shales [12]. Locally, CM was aggregated along faults to form CM layer with the thickness up to one meter, and they are commonly associated with gold-quartz veins [12,19].…”

Section: Ore Deposit Geologymentioning

confidence: 99%

“…Previous fluid inclusion research suggests that the Bumo deposit is form at 180-350 °C [45], significantly lower temperature of layered CM. Meanwhile, the Baoban group went through greenschist-to amphibolite-grade metamorphism during Caledonian [28] which reach up to 500 °C [12,16], similar to that of layered CM. In addition, δ13 C values of layered CM, ranging from -20 to -27%, demonstrate the origin of organic carbon [46].…”

Section: The Genesis Of Layered and Veinlet CMmentioning

confidence: 99%

“…Among all the gold deposits along the Gezhen shear zone, the Bumo deposit is the one closest correlated with CM-bearing rocks. Major ore veins are located near CM, and the gold grade in individual veins is strongly affected by amount of CM [11,12]. However, the CM in the Bumo deposit has never been studied previously.…”

Section: Introductionmentioning

confidence: 99%

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Genesis of Two Types of Carbonaceous Material and Associated with Gold Mineralization in the Bumo Deposit, Hainan Province, South China

Ding

Deng

et al. 2020

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

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Section: Regional Geologymentioning

confidence: 99%