Showing papers by "Shao-Yong Jiang published in 2014"
TL;DR: In this article, the major and trace-element compositions, zircon U-Pb dates, and Sr-Nd-Hf isotopic compositions of these rocks were investigated.
96 citations
TL;DR: In this paper, the authors reported a systematic study on two Devonian A-type granites in the central Jiangxi Province, which indicated that the Wuyi-Yunkai orogeny in South China had changed from syncollisional crustal thickening to post-collisionally extension at least from 415-Ma.
47 citations
TL;DR: In this article, the authors carried out a SHRIMP U-Pb dating for high-U zircons and the results showed that the high U (12,007-26,706) rim domains of the zirons always yield older 206 Pb/ 238 U ages than the low-U (558-3667) mantle domains (228,±-11,Ma, n = 4, MSWD = 3.1), and both of these ages are older than the emplacement age (211 ǫ± ǔ 3 �
43 citations
TL;DR: In this article, a detailed geochemical and isotopic study was performed to constrain the petrogenesis of Jiurui granitoids and coeval mafic rocks, and they concluded that the granitoid are similar to adakites that were likely related to the delamination processes.
36 citations
TL;DR: The Dawan deposit in southern Hunan Province is one of the large-scale metasedimentary rock-hosted uranium deposits in China as mentioned in this paper, where the dominant uranium ore minerals include pitchblende and coffinite, and it is suggested that the coffinite was most likely formed by initial reduction of U 6+ to U 4+ by pyrite from an oxidized Si-rich fluid at an early mineralization stage.
21 citations
TL;DR: In this article, the boron isotope fractionation between modern marine corals and their coexisting seawater collected along shallow area in Sanya Bay, South China Sea was studied.
Abstract: The boron isotope paleo-pH proxy has been extensively studied due to its potential for understanding past climate change, and further calibrations were considered for accurate applications of the proxy because of significant variability related to biocarbonate microstructure. In this work, we studied the boron isotopic fractionation between modern marine corals and their coexisting seawater collected along shallow area in Sanya Bay, South China Sea. The apparent partition coefficient of boron (KD) ranged from 0.83×10−3 to 1.69×10−3, which are in good agreement with previous studies. As the analyzed coral skeleton (∼5 g) spanned the growth time period of 1–2 years, we discussed the boron isotopic fractionation between pristine corals and modern seawater using the annual mean seawater pH of 8.12 in this sea area. Without taking the vital effect into account, (11B/10B)coral values of all living corals spread over the curves of (11B/10B)borate vs. (11B/10B)sw with the α4−3 values ranging from 0.974 to 0.982. After calibrating the biological effect on the calcifying fluid pH, the field-based calcification on calcifying fluid pH (i.e., Δ(pHbiol-pHsw)) for coral species of Acropora, Pavona, Pocillopora, Faviidae, and others including Proites are 0.42, 0.33, 0.36, 0.19, respectively, and it is necessary to be validated by coral culturing experiment in the future. Correlations in B/Ca vs. Sr/Ca and B/Ca vs. pHbiol approve temperature and calcifying fluid pH influence on skeletal B/Ca. Fundamental understanding of the thermodynamic basis of the boron isotopes in marine carbonates and seawater will strengthen the confidence in the use of paleo-pH proxy as a powerful tool to monitor atmospheric CO2 variations in the past.
4 citations
TL;DR: In this article, the authors show that granular nanoparticles are widespreadly distributions in narrow friction zones and that some few complex idea fields, including structural stress, physics and chemistry field, with spatial and temporal evolution exist in the narrow friction zone, moreover, they viably regulate the nanoparticle distribution.
Abstract: Through scanning electron microscope (SEM) observation on kinetic friction and static friction deformation, our data show that granular nanoparticles (commonly 60-80nm with diameter, d) are widespreadly distributions in narrow friction zones. Furthermore, the identification markings, such as nature, experiment and fabric orientation etc., usefully deal with the mechanical analysis,and the granular nanoparticle distributions in narrow friction zones could be subdivided into three kinds, i.e. simple shear, pure shear and rotational shear pattern. Additionally, note that under stress action physico-chemical phase changes might be respectively caused by internal cohesion and dynamic differentiation in the narrow friction zones. These analyses deduce that some few complex idea fields, including structural stress, physics and chemistry field, with spatial and temporal evolution exist in the narrow friction zones, moreover, they viably regulate the nanoparticle distribution.
1 citations