Zircon LA-ICP-MS U-Pb ago and whole-rock geochemistry data are presented for the Dongxigao dioritoporphyries in Pingyi , western Shandong , to restrict its petr
The mylonites occurred in the fracture zones are studied by dynamically recrystallized quartz grains.The natural microstructures in mylonites are simulated and
Drilling operations in polar regions and mountainous areas are complicated by nature of the extreme environment. Yet conventional rotary drilling technologies c