porphyritic造句
1, The magma of porphyritic moyite -monzogranite series in the middle stage mainly originated from the lower crust, being the product of collision-orogeny.
2, The holocrystalline porphyritic olivine basalts and pyroclastic rocks are the components of Pleistocene to recent volcanic activities.
3, Compared with Porphyritic copper deposit, the deposit has a certain difference and it is similar to wolframium or molybdenum deposits.
4, Nanliang complex is mainly composed of porphyritic granite, granophyre, rhyolite - porphyry and rhyolitic agmatite-lava.
5, By contrast, the porphyritic distribution of mountain hazards caused by volcano-tectonic activity is quite obvious.
6, Crust source remelting series contains only anatectic magma stage. It experience the development processes from contaminated granite (porphyritic) to intrusive one (granular texture).
7, Wallrock alteration has character of porphyritic profile metallogenetic model in the spatial distribution.
8, The fine - grained crystalline base of porphyritic rock in which larger crystals are embedded.
9, Tongling quartz - vein type deposit lies in south - east Rushan , Shandong Province,[http:///porphyritic.html] within the Sanfushan porphyritic adamellite body.
10, Based on analysis of the geological characteristics and origin, the Jianbidong Cu-Pb-Zn deposit is regarded as a porphyritic type. Finally the criteria for prospecting are expounded.
11, Furtherly are discussed geological condition under which skarn - porphyritic molybdenum ore deposit are formed, alterations in wall rocks and the genesis of the Mo-deposit.
12, Potash feldspar porphyroblasts occur in large quantity in the granite closely related to the gold ore deposits in the Zhaoyuan-Yexian area, especially in the Guojialing porphyritic granite.
13, Baixiangshan iron deposit is located in the southern part of Ningwu Mesozoic faulted basin. It is classified as Fenghuangshan-type iron deposit in the model of Ningwu porphyritic type iron deposit.
14, The skarn wolfram deposits are formed in granite contact zone and crack of stratum. The porphyry and quartz vein molybdenum deposits are formed in porphyritic granite bodies and fissure vein.
15, The breakthrough advancement of exploration in recent years on granitic type, remelting porphyritic type and syntectic porphyritic type ore deposits was discussed in detail.
16, Yanshanian acid is a mountain of granite, mostly coarse - grained granite and porphyritic granite.
17, Theearly stage comprises fine grain adamellite and medium coarse grained porphyritic adamellite, while the late stage, it consists of medium grain adamellite with huge phenocryst.
18, Chondrules in the Jilin meteorite may be divided into two groups: normal rapid cooling(granular and porphyritic) chondrules and supercooling(grating and excentro-radial)chondrules.
19, The host rocks of the Mishuling intrusion consists of a grayish white porphyritic monzogranite-granodiorite-quartz diorite, in which mafic microgranular inclusions are well developed.