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Phthalates are used in a wide variety of personal care products (PCPs) as solubilizer, denaturant or color fixative. However, there are few studies referring the correlation between phthalate exposure and PCPs use among general population in China. In this study, ten metabolites of phthalates in spot urine samples (N = 500) were quantified using ultra-performance liquid chromatography tandem mass spectrometry. The frequency and duration of 12 types of PCPs were collected by questionnaire survey. The associations of phthalate metabolites and PCPs use were assessed by multivariable liner regression models. Median concentration of mono-benzylphthalate (MBzP) was significantly higher among frequent users of almost all PCPs. Low molecular weight phthalates (monomethyl phthalate (MMP), mono-n-butylphthalate (MnBP) and monoisobutylphthalate (MiBP)) were significantly lower among frequent user of some rinse-off PCPs (e.g., shampoo, facial cleanser, and body wash). Meanwhile, monoethylphthalate (MEP) was positive correlated with frequently use of facial moisturizer. Mono-2-ethylhexylphthalate (MEHP) and MBzP showed a significant positive association with frequently use of body lotion. Univariate linear analyses indicated a significant decreasing trend between urinary concentrations of MMP, MnBP, and the number of rinse-off PCPs being frequently used, and a significant increasing trend between urinary MBzP and the number of leave-on products being frequently used. These findings indicated that the use of some PCPs, especially leave-on PCPs, could be a potential source of exposure to some phthalates. [ABSTRACT FROM AUTHOR]

Leucogranites have a relatively narrow variation in SiO[sub2] content (70.5%-75.5%). Giving similar SiO[sub2] content, leucogranites have relatively higher Al[sub2]O[sub3] (>13.5%) and lower TFeO + MgO (<2.5%) contents than those of normal granites. These petrochemical characteristics suggest that leucogranites are derived from partial melting at relatively low temperature and are not significantly affected by fractional crystallization. In the present study, we propose that the Al[sub2]O[sub3] vs SiO[sub2] and TFeO + MgO vs SiO[sub2] diagrams can be used to distinguish leucogranites from normal granites. In addition, we report the major element compositions of the Jurassic granitic intrusions from Jingshan-Tushan-Mayishan in the Bengbu area, east-central China. Using the Al[sub2]O[sub3] vs SiO[sub2] and TFeO + MgO vs SiO[sub2] diagrams and the comparison with the High Himalayan leucogranites in mineralogical and petrochemical characteristics, we suggest that the Jingshan-Tushan-Mayishan intrusions belong to a leucogranite belt. Similar to those of the High Himalayan leucogranites, the Bengbu leucogranites have low Mg[sup#] values, indicating that they resulted from low temperature dehydration partial melting of the subducted continental crust of the South China Block at the crustal depth. [ABSTRACT FROM AUTHOR]

Reports on the decoupling of surface and subsurface sutures in the Dabie orogen and a continent-collisional lithospheric-wedging model. Differences of neodymium (Nd) and lead (Pb) isotopic compositions between Mesozoic mafic igneous rocks from the North China Block (NCB) and the South China Block (SCB); Subsurface suture between the NCB and SCB; Southward movement of subsurface suture in the Dabie-Sulu orogen.

Focuses on the lithosphere delamination of the Dabie Sulu orogen in China. Formation of syncollisional granites; Geological relationship between the mafic-ultramafic intrusions and granites; Dynamic causes of the mantle upwelling and underplating.

Examines the uranium-lead isotope composition of rutile, omphacite and garnets in the eclogite in China. Determination of the cooling ages of minerals in ultrahigh-pressure metamorphic rocks; Performance of magnetic and heavy liquid separations; Completion of the chemical and mass-spectrometric analyses.

Examines the characteristics of pyroxenite-gabbro intrusions in the Dabie Mountains in China. Geology of the Dabie Mountains; Isochron age of the intrusions; Mechanics of development of syncollisional granites.