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Currie proposed a criterion for predicting liquid immiscibility in silicate melts with reference to their free energies before and after crystal fractionization of a melt. The present authors have calculated the rock analysis data given by Philpotts and proved the validity of Currie ’s method....
The effect of Rayleigh distillation by outgassing of SO 2 and H 2 S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the δ 34 S...
This work is intended to explore a fast and effective approach to the determination of various trace elements in geological samples through improvement and simplification of the method developed by Reynolds (1963, 1967). Absorption correction was made for the Fe content to eliminate the effect...
For the iron deposits occurring in andesitic volcanic rocks of the Lower Yangtze Area, the genetic model for porphyrite iron deposits was proposed by Chinese geologists more than ten years ago on the basis of their detailed studies in the Nanjing-Wuhu Basin. It comprises a set of deposits of...
Presented in this paper are the trace element abundances of 16 samples of Hannuoba ultramafic inclusion-bearing alkali basalts, which were determined by instrumental neutron activation analysis and X-ray fluorescence spectrometry. The petrogenesis of the alkali basalt suite has been modeled by...
The mammilated chert (MC) studied in this paper is a kind of silica-rich concretion (SiO 2 93%) occurring in the Upper Devonian argillaceous silicolites (SiO 2 ≈88%) in Mugui, Guangxi. Impurity components in the MC are relatively low and show systematic variations as compared with the country...
Based on the most recently available petrochemical data from China’s Continent and the thickness of the crust, the authors have calculated the contents of carbon, sulfur and phosphorus in the lithosphere of China’s Continent (including the sedimentary metamorphic structural layer, the granite...
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