辉绿岩
3.The metaperidotite is strongly depleted in TiO_2. The dolerite has low TiO_2 and some of the granitoids on the FAM diagram show a Skaergaard liquid trend.
4.A dark-gray to black, fine-textured igneous rock composed mainly of feldspar and pyroxene and used for monuments and as crushed stone.
5.Cataclactic and mylonitic texture as well as massive structure can be found in the rim of diabase dikes and veins which have been strongly altered and mainly consist of albite, amphibole, chlorite, epidote and calcite with a little residual plagioclase and pyroxene.
6.Based on an analysis of geochemical characteristics of rocks and trace elements as well as rare earth elements, this paper holds that they are products of crystallization differentiation of the same magma, that the major ore resource of this area is copper, and that gabbro-diabase is the main ore-bearing horizon.
7.The structure and properties of process and mechanics were analyzed by torque rheometer, omnipotence mechanics tester, IR, SEM, DMA, DSC.
8.Through opencut mining of Cihai hidden iron ore deposit in recent years, it is found that there are multiperiodic diabase walls penetrated the steeply north-inclining iron ore bodies in different directions in early postmineral period so as to destroy the Integrity of the iron ore bodies and divide them into many small south-inclining bodies.
9.The diabases and basalts are the transitional MORB/IAB-type basalt. According to the trace elements in the ophiolite,the gabbros and basalts show the same characteristics as the island arc basalt,for the depletion elements of Nb,Ta and its relative enrichment of Rb,Sr and Ba.
10.The results showed that the continu- ous basalt fiber can be prepared with the length maximum of 15 m and diameter of 12.2μm by choosing Luoyang diabase in Shannxi Province as the source ore and adopting straticulate alumina and chromium oxide crucible ladder-shape with a orificed tip of 13 mm in height and 4 mm in diameter.
