The mafic dikes , volcanic rocks and alkalic - ultramafic dikes are terrestrial , and were all formed in the extensional settings . 3 三类岩石在侵位结晶过程都不存在明显的地壳混染。
5.
The mineralization temperature is in a range of 90 ~ 300 , and the mineralization fluid is a combination of slightly acidic - slightly alkalic precipitations , seawater and magmatic water 其成矿温度在90 ~ 300之间，成矿流体为低盐度的弱酸性弱碱性大气降水、海水和岩浆水的混合溶液。
6.
Resistance to chlorine - and oxygen - bleaching : having extremely strong resistance to chlorine - and oxygen - bleaching , and having very good whitening effect even if under strong acidic and alkalic conditions 耐氯漂氧漂性：具有极强的耐氯漂和氧漂性能，且在强酸强碱性条件下，依然具有很好的增白效果。
7.
Therefore , based on the isotopic chorology , petrochemistry , geochemisty and sr , nd , pb isotope , the ph . d dissertation mainly studied some yanshanian mafic dikes , volcanic rocks and alkalic - ultramafic dikes in shandong province 本论文主要从同位素年代学、岩石化学、地球化学和sr ? nd ? pb同位素方面对山东地区燕山期基性脉岩、火山岩和碱性超基性脉岩进行了系统研究。
8.
Integrating the ages of the mafic dikes and alkalic - ultramafic dikes in this paper , and the known data of mafic dikes and volcanic rocks , at least , there existed four episodes mesozoic crustal extension in shandong province , namely , 80ma , 100ma , 120 ma and140ma , which is similar to that of sc ( south china ) , indicating that maybe the effect of the subductio 但鲁东地区在地壳拉张方面可能存在着与鲁西地区不同的制约因素：即鲁东地区存在拆沉作用和可能存在地慢柱的影响’ 、而鲁西地区可能受到了郊庐断裂的左行走滑剪切和拉张活动的影响。
9.
During diagenetic process , there may exist the fractional crystallization of clino - pyroxene , plagioclase , olivine and ti - fe oxide , and the accumulation of olivine . the alkalic - ultramafic dikes formed by low degree partial melting ( 3 . 4 % ) of enriched mantle , consist of single olivine pyroxenolite , the dominating olivine fractionation is evident 成因上为富集地幔部分熔融作用的结果，但在成岩过程中也可能存在单斜辉石、斜长石、橄榄石和ti - fe氧化物等矿物的分离结晶作用。
10.
The study shows that cretaceous volcanics mainly consist of medium acidic volcanic lava and volcanoclastic rocks , with locally developed basic lava ; medium acidic volcanics mainly consists of calc - alkalic series , was formed in compressive orogenic environment , and has good reservoir property , while cretaceous basis lava mainly consists of alkalic series , was formed in rift environment , and has poor reservoir property 结果认为，白垩纪火山岩以中酸性火山熔岩和火山碎屑岩为主，局部发育基性熔岩；中酸性火山岩以钙碱性系列为主，形成于挤压造山环境，储集性能较好，而白垩纪基性熔岩以碱性系列为主，形成于裂谷环境，储集性能较差。
