porphyritic granite 中文意思是什麼
porphyritic granite
解釋
斑狀花崗巖- porphyritic : adj. 【地質學；地理學】斑巖的，斑狀的。
- granite : n. 1. 花崗巖，花崗石。2. 堅如磐石，堅韌不拔。
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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。
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