Sm and Nd isotopic geochemistry of Paleo-Mesoproterozoic meta-basic volcanics from Middle Hainan,China;

Chronology and geological implication of the Paleo-Mesoproterozoic alkaline-rich intrusions belt from the northern part in the North China Craton.;

The Fabric Characteristics and Origin of the Mesoproterozoic Pyritic Stromatolite from the Gaobanhe Deposits, East Hebei Province;

Third Member of Mesoproterozoic Gaoyuzhuang Formation at Qiangou Section in Yanqing County of Beijing:a typically non-stromatolitic carbonate succession of the Precambrian;

Glauconites formed in the high-energy shallow-marine environment of the late Mesoproterozoic:a case study from Tieling Formation at Jixian section in Tianjin,North China;

They formed in Mid-Proterozoic period with zircon SHRIMP U-Pb age of 1 343 Ma±30 Ma.

According to field investigation,the Yingfeng rapakivi granite is formed in mid-Proterozoic and located between shear belts as a lentiform in the structural belt of north margin of Qaidam basin.

We make conclusion that a rift-limited ocean basin had been developed on the basis of the Yangtze continental margin in the mid-Proterozoic accompanying the extension.

Discovery of Middle Proterozoic Ophiolite in the West Part of North Qilian Mountains and Its Geological Significance;

the Huangmailing Formation of Hongan Group of Middle Proterozoic at the Huangmailing Phosphoric Ore, Central China.

The correlation and division of Middle Proterozoic-Sinian Period stratigraphy of south China orogen are described in this paper?Based on the feature of Nanhua-Qingbaikou strata at Huaiyushan area,the area can be regarded as a model section of Nanhua system base boundary.