IRON DEPOSITS OF S. W. HUPEH

INTRODUCTION Iron deposits are widely distributed in S. W. Hupeh, especially in the districts of I Tu (宜都) and Changyang (长陽) where native mining industry has been carried on since very ancient time. Production from such mines     

DR.AMADEUS W.GRABAU A REMINISCENCE

It is a great privilege that I, as Dr. Grabau's first Chinese student, should be allowed to write a few words is this volume. I have always treasured the memory of the years when, as a student, I sat at his feet in Columbia University. Little did I dream then that in years to come, he, whom I revered as my master, would come to China to become the mentor and inspirer of so many young Chinese in the science of geology.     

A commented translation of the paper by C.W. Correns and W. Steinborn on crystallization pressure

Crystallization of salts is recognized to be a major factor of the degradation of porous materials such as stone and concrete. On the theoretical side, there is now general acceptance about the thermodynamic origin of this phenomenon. However, on the experimental side, there are only scarce quantitative data. In this respect, the reference work par excellence is that of Correns (Discuss Faraday Soc 5:267–271, 1949) who shows a good correlation between calculated and measured crystallization pressures. However, concerns about both the thermodynamic derivation and the experimental conditions raise the question about why Correns could have obtained such a good correlation. This issue is discussed extensively in this paper which is organized as a commented translation of a former paper by Correns, co-authored by Steinborn, and that is much richer in experimental details.

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OBITUARY NOTE ON MR.S.W.WANG

The untimely death of Mr.S.W.Wang on Feb.10th 1936 iscertainly a serious loss to the Chinese geology.Although his name is notso well known as others in the geological circle,Mr.Wang has indeedmade remarkable contribution to the study of Chinese crystals and     

Tridymitic jasperoid deposits in N. W. Queensland

A number of small, fault-controlled, siliceous, copper deposits in the Precambrian of North-West Queensland contain most of their silica as tridymitic jasperoid. The tridymite has pseudomorphically replaced the dynamic metamorphic assemblages that resulted from earlier fault movements. It is proposed that seismic pumping (Sibson et al., 1975) forced copper and silica-charged hydrothermal solutions along major faults. At elevated pressures quartz-copper lodes were emplaced but in lower pressure zones on feather faults at the end of major fault zones or in small fault off-shoots tridymitic jasperoid deposits formed. As tridymite is unstable at quite low burial pressure the preservation of the tridymitic jasperoid desposits reveals the limited amplitude of uplift and erosion in north-west Queensland since the deposits formed in the middle Proterozoic.     

CORUNDUM OF PING SHAN DISTRICT, W. CHIHLI.

I. GEOLOGY AND TOPOGRAPHY OF THE CORUNDUM DISTRTOT. The corundum is found in Ping Shan Hsien (平山縣) which is located in the south-western part of Chihli. It connects with Chin Hsing