Geochemical and Nd isotopic constraints on provenance and depositional setting of the Shihuiding Formation in the Shilu Fe–Co–Cu ore district, Hainan Province, South China

Yu, Liangliang; Zou, Shaohao; Cai, Jianjun; Xu, Dong; Zou, Fenghui; Wang, Zhilin; Wu, Chen; Li, Meng

doi:10.1016/j.jseaes.2016.01.015

Cited by 23 publications

(5 citation statements)

References 61 publications

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“…Chondrite normalized REE patterns (a, c) and PAAS‐normalized multielement spidergrams (b, d) for samples from the Shilu Group and Shihuding Formation. Area in gray represents samples from the Kunyang group in Southwest Yangtze (Ji et al, 2016), and gray lines in Figure 4c represent samples of Shihuiding formation from Yu et al (2016). Chondrite and upper crust‐normalized data are from Sun and McDonough (1989) and Rudnick and Gao (2003).…”

Section: Resultsmentioning

confidence: 99%

Provenance Record of Late Mesoproterozoic to Early Neoproterozoic Units, West Hainan, South China, and Implications for Rodinia Reconstruction

et al. 2020

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Unraveling the character and source of late Mesoproterozoic‐early Neoproterozoic sedimentary sequences is crucial in constraining Rodinia reconstructions. We carried out an integrated geochemical, zircon U‐Pb geochronological and Lu‐Hf isotopic study of the Shilu Group and the overlying Shihuiding Formation in Hainan, South China. These two successions are chemically mature and dominated by siliceous components. The Shilu Group was mainly derived from felsic arc lithologies whereas the Shihuiding Formation was from recycled sedimentary materials and records a transition from convergent to passive margin settings during the late Mesoproterozoic‐early Neoproterozoic in Hainan. Detrital zircons from the Shilu Group and Shihuiding Formation yield similar age populations, with maximum depositional ages of ~1,100–1,000 Ma and ~900 Ma, respectively. The Shilu Group matches well with the Kunyang Group outcropped in the Yangtze Block in depositional age, detrital zircon age populations and Lu‐Hf isotopic compositions, and geochemical characteristics, whereas the Shihuiding Formation exhibits significantly different detrital age populations from the Wanquan Group in the Cathaysia Block. This indicates that Hainan was linked to the Yangtze Block rather than the Cathaysia Block in the late Mesoproterozoic‐early Neoproterozoic. The Shilu and Kunyang groups have similar detrital age patterns to the late Mesoproterozoic to early Neoproterozoic strata in northwest India and are distinct from their equivalents in west Laurentia, suggesting an external location of Hainan‐Yangtze in Rodinia.

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Section: Resultsmentioning

confidence: 99%

Provenance Record of Late Mesoproterozoic to Early Neoproterozoic Units, West Hainan, South China, and Implications for Rodinia Reconstruction

et al. 2020

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“…The Shihuiding Formation is a suite of siliciclastic clastic rocks that are unmetamorphosed and less deformed [81]. In contrast to the Shilu Group, it has a higher quartz content, is enriched in SiO 2 , and depleted in CaO, Na 2 O, and TiO 2 with more remarkable differentiation between light and heavy rare earth elements [71,82], implying that it should originate dominantly from recycled sediments. Furthermore, it yields an additional age peak at ~1390 Ma and a slightly younger maximum depositional age of ~930 Ma [40,71] (Figure 3).…”

Section: Tectonostratigraphic Relationships Between the Baoban Comple...mentioning

confidence: 99%

Precambrian Tectonic Affinity of Hainan and Its Evolution from Columbia to Rodinia

Zhang,

Cui,

Yang

et al. 2023

Minerals

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The assembly and break-up of supercontinents have been hot research topics in international earth sciences because they represent a breakthrough in reconstructing the history of continental evolution and deepening the theory of plate tectonics, which is of indispensable importance to the development of earth sciences. With the continuous enrichment of paleomagnetic, paleontological, chronological, and geochemical data in the last two decades, the evolution of the supercontinent from Columbia to Rodinia has gradually gained unified understanding, and the reconstruction of the major plates within the supercontinent has basically been constrained. In contrast, the reconstruction of microplates, such as South China, Tarim, and Kabul, is controversial and has now become a popular topic and frontier area of supercontinent reconstruction. Hainan lies at the southern tip of South China, and a few Proterozoic units are exposed on the island. At present, Hainan is often taken as a part of the Cathaysia Block. However, due to the lack of exposed Mesoproterozoic igneous and supercrustal rocks in Cathaysia, the reconstruction model of the Cathaysia Block and even the South China Craton based solely on Mesoproterozoic units in Hainan are distinct from those based on units in the Yangtze Block and younger Proterozoic units within the Cathaysia Block, which makes the paleoposition of the South China Craton controversial. In this paper, we provide new detrital zircon U–Pb age data for the Baoban Complex, Hainan, together with the available data to comment on the affinities between Hainan and the Yangtze and Cathaysia Blocks in the Proterozoic, and on this basis, we can reconstruct the South China Craton within the Proterozoic supercontinents.

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“…Late Paleozoic to early Mesozoic I-type granites are the most common and marked the beginning of the South China Indosinian Orogeny whereas the late Mesozoic calc-alkaline granites are considered as a response to the subduction of the Paleo-Pacific plate [26]. A few Mesozoic and Cenozoic basalts outcropped in several rift basins in northern Hainan Province [27]. More than 50 gold deposits and occurrences with a gold reserve of over 143 t have been discovered in Hainan Province, and most of them are located along the Gezhen ductile shear zone.…”

Section: Regional Geologymentioning

confidence: 99%

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

Ding¹,

Deng²,

Xu³

et al. 2020

Preprint

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Carbonaceous material (CM) is common in meta-sediments and is generally interpreted to be intimately associated with gold mineralization. For the Bumo deposit in Hainan Province, South China, CM is mainly hosted by greenschist facies- to amphibolite-facies metamophic rocks of the Paleo- to Mesoproterozoic Baoban Group and by auriferous veins and is used as an important gold prospecting indicator. However, the genesis of CM and the relationship with gold mineralization are still not clear. Field work and thin section observation indicates that two types of CM occur, i.e., layered and veinlet. Layered CM, up to meters thick, prevails in the deposit. More importantly, Au-bearing sulfides are commonly distributed along the boundary between the quartz veins and layered CM. In contrast, veinlet CM, co-precipitated with gold and sulfides, has the thickness of micro- to centi- meters, and these thin veins occur in quartz veins and hydrothermally altered rocks. Scanning Electron Microscope (SEM) analysis indicates that layered CM has a stringy shape and laminate structure, while veinlet CM occurs as isometric particles. Raman carbonaceous material geothermometer indicates that layered CM with high maturity is formed at elevated temperatures of 400 – 550°C, consistent with X-ray diffraction (XRD) analysis. In contrast, veinlet CM with low maturity is formed at 200 – 350°C, generally consistent with gold mineralization. In addition, layered CM has δ13C values ranging from -30 to -20%, demonstrating a biogenic origin. Consequently, it is interpreted that layered CM is formed by a pre-ore metamorphic event during Caledonian, and its reducing nature promotes gold precipitation via destabilization of aqueous Au bisulfide complexes or facilitating sulfidation. Veinlet CM is hydrothermal origin, and its precipitation modified the chemical conditions of ore fluids, leading to the destabilization of Au complexes and thus favorable for mineralization.

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Geochemical and Nd isotopic constraints on provenance and depositional setting of the Shihuiding Formation in the Shilu Fe–Co–Cu ore district, Hainan Province, South China

Cited by 23 publications

References 61 publications

Provenance Record of Late Mesoproterozoic to Early Neoproterozoic Units, West Hainan, South China, and Implications for Rodinia Reconstruction

Provenance Record of Late Mesoproterozoic to Early Neoproterozoic Units, West Hainan, South China, and Implications for Rodinia Reconstruction

Precambrian Tectonic Affinity of Hainan and Its Evolution from Columbia to Rodinia

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

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