dacite 中文意思是什麼
dacite
解釋
石英安山石-
By studying, the main conclusions have been achieved as follows : i. the volcanic rocks, as the result of the partial melting of enriched mantle, comprise calc - alkaline andesite and dacite and a few tholeiite
通過研究，得出以下主要認識： 1 、火山巖為一套以鈣堿性安山巖為主，含少量拉斑玄武巖和英安巖。 -
Xiongcun copper - gold ore deposit is located in gangdese metallogenetic belt with a large scale. the ore body mainly exists in the second lithoid unit ' s tuffs and the third lithoid unit ' s dacite tufa of the cretaceous volcanic stratum, which are not only mother rock but also mineralized body
雄村銅金礦床處于岡底斯成礦帶，礦床規模巨大，礦體主要賦存於白堊系火山巖地層第二巖性單元的黃鐵絹英巖化硅化凝灰巖和第三巖性單元英安質疑灰巖中，上述巖石既是賦礦圍巖又是礦化體。 -
The upper cretaceous jingzhushan formation in the biru basin, xizang consists of a succession of coarse - grained elastic rocks in the alluvial fan - fan delta depositional system, intercalated with intermediate - acidic volcanic rocks including dacite, andesite, quartz trachyandesite and rhyolite
摘要上白堊統競柱山組為一套沖積扇扇三角洲沉積體系的粗碎屑巖，間夾由英安巖、安山巖、石英粗安巖和流紋巖組成的中酸性火山巖。
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