Geochemical evidence for original minerology of middle Ordovician limestones;

Characteristics of Middle Ordovician Organic Reefs in Bachu Area;

By means of core observation and log analysis of reservoir,it is recognized that widely distributed Tazhong uplift is formed from the late of Middle Ordovician to the early of Late Ordovician(from Llandeilo to Early Caradoc).

The middle Ordovician volcanic rocks of the Daliugou Group in the Hami-Wupu area of the Eastern Tianshan seem to be the oldest strata of the studied area.

The common traits of the ores, ore body conformation and ore-bearing rock series of Middle Ordovician Epoch in central Hunan were briefly introduced; the traits of organic geochemistry, RE, stable isotopes, microelements and macro-elements of the kind of Mn-ores were summarized emphatically.

Hydrocarbon generation capacity of marine carbonatite of the middle Ordovician on the south slope of Huimin sag;

Carbonate Microfacies Analysis of Middle Ordovician Majiagou Formation in Tangshan Area,Hebei Province;

Divide Middle Ordovician Series and Research on the Characteristic of Water Carrier;

Review and expectation on the discovery of Ordovician Lunnan-Tahe Oilfield,Tarim Basin;

The Paleo-Karst Feature of Ordovician Carbonate Rocks in Lunnan Area;

Dissolution Kinetic Characteristics of Ordovician Marine Carbonate in Central Tarim Basin;