alkali granite 中文意思是什麼
alkali granite
解釋
堿性花崗石-
The qiongzhong and danxian batholiths, as the largest early mesozoic syntectonic granite intrusions in hainan island, are mainly composed of porphyritic biotite two - feldspars granitoids, in which alkali - feldspar phenocrysts and dark minerals are foliated mostly in we - direction. the granites are of metaluminous i - type. major and trace elements show co - variations with sio2, suggesting the fractional crystallization of plagioclase, hornblende, apatite and ti - fe oxides in the evolution of the granites
花崗巖的主量元素和部分微量元素成分與sio _ 2呈良好的相關關系，顯示出明顯的斜長石、角閃石、磷灰石和ti - fe氧化物等的分離結晶作用，總體上它們與大陸島弧花崗巖的微量元素豐度和分佈特徵相似，系統地虧損ba 、 nb 、 sr 、 p和ti等元素。 -
Calc - alkali granite
鈣堿花崗巖 -
Comparing with the granitoid from jiaodong guojialing in mineralogy, the minerals in the granitoid in nimu - qushui granitoid crystallized in the environment of oxidization, the granitoid has a characteristic of rich volatile components and a high content of alkali, the rock - forming minerals and accessory minerals have a characteristic of i - type granite, and the granite shows a characteristic in favor of an and cu ore formation
通過與膠東郭家嶺地區的花崗巖類的礦物學進行對比，可知本區花崗巖類礦物結晶時處于氧化狀態，具有富含揮發分的特徵，堿質含量高，造巖礦物及副礦物表現出型花崗巖特徵，具有殼幔混源物質，表現出有利於金、銅礦形成的花崗巖類的礦物特徵。
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