青藏巨厚陸殼的性質(zhì)和形成機(jī)制,是重要的科學(xué)問(wèn)題.通過(guò)對(duì)青藏巖漿巖,特別是其N(xiāo)d、Hf同位素的研究,證明青藏高原并存著新生地殼和再循環(huán)地殼兩類(lèi)地殼.地殼的結(jié)構(gòu)和屬性對(duì)成礦礦種、礦床類(lèi)型和分布有重要的控制作用.青藏巨厚地殼是由兩種機(jī)制（構(gòu)造加厚;地幔物質(zhì)通過(guò)巖漿作用注入加厚）共同造成的,二者貢獻(xiàn)比例約6∶4.地殼增厚主要發(fā)生在50～25 Ma期間.大陸碰撞帶是造成地殼凈生長(zhǎng)的重要構(gòu)造部位. 

【文章來(lái)源】：地球科學(xué). 2020,45(07)北大核心EICSCD

【文章頁(yè)數(shù)】：13 頁(yè)

【文章目錄】：
1 青藏高原的兩類(lèi)陸殼
    1.1 2005年及其以前的工作
    1.2 對(duì)岡底斯帶（拉薩地塊）地殼的進(jìn)一步系統(tǒng)研究
    1.3 Hf同位素填圖及巖石圈架構(gòu)對(duì)礦產(chǎn)類(lèi)型的控制
2 青藏高原巨厚地殼形成的機(jī)制
    2.1 青藏高原地殼增厚的兩種機(jī)制
    2.2 地殼增厚的過(guò)程及兩種機(jī)制對(duì)增厚的相對(duì)貢獻(xiàn)
3 結(jié)語(yǔ)


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