Some new analytical data of siliceous and calc-sinters from Rekeng,Batang County,and Reshuitang,Litang County,are reported,indicating that gold mineralization in both area,with Au contents from <0.

Since the beginning of this century, a large number of different names have been given to this kind of deposit, such as sinter, calc-sinter, travertine, tufa or calctufa, Sinterkalk, Wiesenkalk, Dauch and Quellkalk.

The δ18O and δ13C values of ostracod shells and sinter carbonates from the drill holes of recent sediments in the bottom of the Qinghai Lake are determined.

Evaluation to the deposition rate of Huanglong travertine by calcium ion equilibrium;

Origin and forming mechanisms of travertine at Huanglong Ravine of Sichuan;

The bryophyte communities associated with travertine depositon in Northwestern England and North Wales,U.K.;

Process of Deposition and Climate Environment Information of Tufa at Binglingshan, Qinghai;

Changes in climate and vegetation in Niangziguan Spring Watershed of Shanxi Province since MIS12/11 recorded by the spring tufa

In order to select the suitable methods to record the environmental change by using tufa,a comparison of different dating methods for tufa was made.