Refertilization of lithospheric mantle beneath the North China Craton in Mesozoic: Evidence from in situ Sr isotopes of Fuxin peridotite

Zou, Dongya; Zhang, Hongfu; Zhang, Xiaoqi; Zhang, Huiting; Su, Ben‐Xun

doi:10.1016/j.lithos.2020.105478

Cited by 8 publications

(7 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… b Calculated by assuming an ancient NCC peridotite composed of 72% olivine, 25% orthopyroxene, and 3% clinopyroxene (D. Zou et al., 2020). …”

Section: Discussionmentioning

confidence: 99%

“…Considering the probable presence of hydrous phases in the intensely hydrated Jurassic to Early Cretaceous lithospheric mantle, we only used the lowest H 2 O estimations of the lithospheric mantle (<1,500 ppm), which are below the water solubility in the upper mantle (Hauri et al., 2006; Padrón‐Navarta & Hermann, 2017), to constrain H 2 O in the equilibrated olivine. A previous petrologic study has shown that the ancient NCC peridotite was composed of 72% olivine, 25% orthopyroxene and 3% clinopyroxene (D. Zou et al., 2020). We also made an assumption of 50% olivine and 50% clinopyroxene in peridotite to constrain the minimum water content in olivine (Xia et al., 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Calculated viscosity ratios between the lithospheric mantle and the asthenosphere (using an average value of 3.7 × 10 18 Pa s) versus age. (a-d) Viscosity ratios for the >120 Ma lithospheric mantle based on modal proportions of 72% olivine + 25% orthopyroxene + 3% clinopyroxene (D Zou et al, 2020;. and 50% olivine + 50% clinopyroxene(Xia et al, 2013;.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Craton Destruction Induced by Drastic Drops in Lithospheric Mantle Viscosity

Wang

Liu

et al. 2022

Earth and Space Science

View full text Add to dashboard Cite

The disruption of the mantle roots of cratons is common after cratonization. Craton destruction, which is characterized by severe lithospheric thinning, extensive thrust and extensional deformation, basin filling, and intense thermal activities, is relatively rare and is generally attributed to intensely reduced viscosity contrasts between the lithospheric mantle root and the underlying asthenosphere. However, the extent of the required viscosity contrast remains unclear. The North China craton (NCC) is a typical example of a partially destroyed craton, with its eastern part experiencing destruction in the Early Cretaceous. In this study, we measured the water content of clinopyroxene phenocrysts in Middle Jurassic lithospheric mantle‐derived, weakly alkaline volcanic rocks from the Shanhaiguan area. Our data and those of previous studies show that the lithospheric mantle in the eastern NCC contained substantial amounts of water (650–2,900 ppm) before craton destruction. In addition, the continuous supply of water by the subducted Paleo‐Pacific slab resulted in a more hydrous lithospheric mantle (up to ca. 9,000 ppm) during the craton destruction. The viscosity contrasts between the lithospheric mantle root and the asthenosphere (with an average viscosity of 3.7 × 1018 Pa s) were 2–8 and 0.3–2 before and during the craton destruction, respectively. Our study indicates that a drastic drop in the lithospheric mantle viscosity, which is controlled by the synergic effects of a high water content and elevated temperature, is required to induce craton destruction.

show abstract

“… b Calculated by assuming an ancient NCC peridotite composed of 72% olivine, 25% orthopyroxene, and 3% clinopyroxene (D. Zou et al., 2020). …”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Craton Destruction Induced by Drastic Drops in Lithospheric Mantle Viscosity

Wang

Liu

et al. 2022

Earth and Space Science

View full text Add to dashboard Cite

show abstract

“…Average profiles for porphyroclast and recrystallized dolomites are shown for comparison. Archean-Paleoproterozoic and Mesozoic mantle peridotite xenoliths from the North China craton show that the subcontinental lithospheric mantle is characterized by relatively low Sr isotope ratios (0.7030-0.7060; Zhang et al, 2020;Zou et al, 2020). Thus, a mantle origin for the fluids can probably be ruled out based on the high levels of radiogenic Sr in the recrystallized samples (Fig.…”

Section: Ordovician-silurian Arc-continent Collisionmentioning

confidence: 99%

“…(B) A binary plot of 87 Sr/ 86 Sr vs. d 13 CV-PDB, for dolomite grains and whole-rock samples from drill core. The Sr isotope composition of Bayan Obo group sediment (Yang et al, 2019), subduction-derived fluids (Scott et al, 2019), Silurian-Devonian (S-D) granitoids from the north margin of the North China craton (Zhang et al, 2014), and Archean-Paleoproterozoic (A-P) and Mesozoic (M) subcontinental lithosphere mantle (SCLM) of the North China craton (Zhang et al, 2020;Zou et al, 2020) reworking of the H8 unit (Ling et al, 2013). The northernmost margin of the North China craton is delineated by the Solonker suture, along which the Paleo-Asian Ocean closed to form the southern sections of the Central Asian orogenic belt (Fig.…”

Section: Ordovician-silurian Arc-continent Collisionmentioning

confidence: 99%

Mineralization of the Bayan Obo Rare Earth Element Deposit by Recrystallization and Decarbonation

Wei

Deng

et al. 2022

Economic Geology

View full text Add to dashboard Cite

The genesis of the Bayan Obo giant rare earth element (REE) deposit has been debated for several decades. Here, we report the isotopic effects of dynamic recrystallization in the H8 carbonatite, which is the principal ore carrier in the deposit. We studied fresh drill core to a depth of 1.78 km and documented the elemental and C-O-Sr isotope evolution of rock-forming dolomite during its deformation and reaction with fluids. The precursor dolomite and the products of its recrystallization differ in δ13CVienna-PeeDee Belemnite (V-PDB) (–1.09 to 2.37 vs. –3.59 to 0.79‰, respectively) and 87Sr/86Sr (0.70241–0.70394 vs. 0.70288–0.71409, respectively), and show a similar δ18Ovienna-standard mean ocean water (V-SMOW) range (10.3–16.9‰). The strong negative shift in δ13CVPDB indicates that, locally, there was as much as 40% loss of CO2 from the precursor dolomite, although most of the recrystallized dolomite experienced decarbonation on a smaller scale. Clumped monazite grains associated with apatite in paragenetically similar samples yielded variable in situ Th-Pb dates (980–340 Ma), whereas those in monomineralic veinlets give a consistent age of ~400 Ma and consistent initial Nd isotope ratios. This indicates that the wide range of dates may not represent real REE depositional events, and that the primary REE minerals deposited in the Mesoproterozoic underwent isotopic reequilibration and REE remobilization in the mid-Paleozoic. Recrystallization and decarbonation of dolomite in the H8 unit were facilitated by its reaction with subduction-derived silica- and halogen-rich fluid, genetically linked to plate-convergence processes along the northern margin of the North China craton and did not require an influx of REEs from an external source.

show abstract

Destruction of Archean lower crust recorded in granulite and pyroxenite xenoliths of Mesozoic basalts from Western Liaoning, North China Craton

Zou

Zhang

2022

Contrib Mineral Petrol

View full text Add to dashboard Cite

Refertilization of lithospheric mantle beneath the North China Craton in Mesozoic: Evidence from in situ Sr isotopes of Fuxin peridotite

Cited by 8 publications

References 75 publications

Craton Destruction Induced by Drastic Drops in Lithospheric Mantle Viscosity

Craton Destruction Induced by Drastic Drops in Lithospheric Mantle Viscosity

Mineralization of the Bayan Obo Rare Earth Element Deposit by Recrystallization and Decarbonation

Destruction of Archean lower crust recorded in granulite and pyroxenite xenoliths of Mesozoic basalts from Western Liaoning, North China Craton

Contact Info

Product

Resources

About