SHRIMP U-Pb zircon geochronological and geochemical evidence for Neoproterozoic arc-magmatism along the western margin of the Yangtze Block, South China.

Distinct mantle sources of low-Ti and high-Ti basalts from the western Emeishan large igneous province, SW China: implications for plume–lithosphere interaction

The Yanbian Terrane (Southern Sichuan Province, SW China): A Neoproterozoic arc assemblage in the western margin of the Yangtze Block

/pdf/reconstructing-south-china-in-phanerozoic-and-precambrian-1lurjj8jas.pdf

Reconstructing South China in Phanerozoic and Precambrian supercontinents

SHRIMP zircon U–Pb geochronological and whole-rock geochemical evidence for an early Neoproterozoic Sibaoan magmatic arc along the southeastern margin of the Yangtze Block

The Middle Proterozoic ophiolites from the Yanbian and Shimian areas (Sichuan Province, China), which occur as allochthonous fragments embedded within the Late Proterozoic orogenic belt on the western rim of the Yangtse Craton, consist of mantle-derived tectonite peridotites, plutonic cumulates, and submarine volcanics. The mantle sequence is made up of serpentinized harzburgites, representing an impoverished residual material after a high degree partial melting of upper mantle (>30%). The plutonic sequence comprises ultramafic cumulates, Mg-gabbros (troctolites, Ol-anorthosites and Ol-gabbros), gabbronorites (including Ol-free gabbros), ferrogabbros, and albitites

Proterozoic ophiolites from Yanbian and Shimian (Sichuan Province, China) : petrography, geochemistry, petrogenesis, and geotectonic environment

https://doi.org/10.1016/j.ultsonch.2022.106035

Combined suppression effects on hydrodynamic cavitation performance in Venturi-type reactor for process intensification

Synchrotron-based radiation techniques are increasingly used in the field of flow condition measurements. As a complicated multiphase flow, cavitation has been investigated in a wide variety of industrial fields, to prevent damages on spillways at large dams or intensify the bacteria eradication rate during water treatments. To control the detrimental effects of cavitating flows, the dynamics of and mechanisms affecting cavitation development shall be visualized and identified in real-time. Due to the large reflection and scattering effects of multiphase flow, standard visible-light imaging technologies cannot penetrate vapor bubbles and provide extremely limited information. In this study, the synchrotron source emitted high-flux X-ray pulses are used to capture flow motion and visualize internal structures with sufficiently high spatial and temporal resolutions. The image processing procedures on raw x-ray images are developed using 2D Fourier transform (FT) and wavelet transform (WT) to implement the contrast enhancement and de-noising. Through the edge detection algorithm, tracking either seeded particles or phase interfaces inside the opaque multiphase flow can be achieved to perform the particle image velocimetry. With decomposing particle-only and particle-eliminated subplots from the X-ray phase-contrast image, the time-resolved velocity and void fraction fields are obtained simultaneously, paving a way for further flow condition analysis such as densitometry. 

Chuan Min Sun

Papers

Proterozoic ophiolites from Yanbian and Shimian (Sichuan Province, China) : petrography, geochemistry, petrogenesis, and geotectonic environment

Combined suppression effects on hydrodynamic cavitation performance in Venturi-type reactor for process intensification

Synchrotron X-ray based particle image velocimetry to measure multiphase streamflow and densitometry