摘要
大数据研究表明,全球新生代埃达克岩主要出现在中新世时期,主要是C型的,与地壳加厚有关。根据中新世埃达克岩在欧亚大陆上的分布,可以识别出一个从青藏高原经巴基斯坦、伊朗、土耳其、小高加索、希腊、马其顿、塞尔维亚、匈牙利直至波兰的中新世的埃达克岩带。许多学者认为,该带的埃达克岩指示该区存在地壳加厚事件,该区从地貌上属于高原。该区由于情况复杂,资料缺乏,资料的精细程度也不尽相同,因此,对高原的描述不可能很清楚。我们大体知道,在始新世时期,印度-非洲板块与欧亚板块发生碰撞,部分地区在始新世-古新世即出现埃达克岩,至渐新世晚期-中新世,埃达克岩广泛出露,暗示板块强烈碰撞作用主要出现在中新世。巨型的欧亚高原可能从渐新世晚期-中新世早期开始形成,一直持续到现在,现在的喀尔巴阡、土耳其、伊朗、巴基斯坦、阿富汗、西藏、青海、蒙古以及四川和云南的西北部,仍然属于高原的范围。
Big data shows that the global Cenozoic adakites mainly formed in the Miocene period. They are mainly C type and associated with crustal thickening. According to the distribution of Miocene adakites in the Eurasia Plate, Miocene adakite belt from Tibetan Plateau through Pakistan, Iran, Turkey, small Caucasus, Greece, Macedonia, Serbia, Hungary to Poland could be identified. Many scholars believed that the occurrence of this adakite belt indicated a crustal thickening event. The area belongs to the plateau from topographic feature with complexity situation, so that geological information is lacked and the description of the plateau can not be very clear. From limited documents, we preliminarily addressed that the India-Africa Plate collides with the Eurasian Plate in the Eocene epoch, forming adakite in Eocene-Paleocene, Miocene to late Oligocene. The extensive distribution of adakites, suggests that strong collision mainly occurred in Mio- cene. The giant Eurasian Plateau may been formed since the late Oligocene to present, Carpathian, Balkans, Turkey, I- ran, Pakistan, Afghanistan, Tibet, Qinghai, Mongolia and Sichuan and the northwest of Yunnan, are still a part of this plateau.
出处
《矿物岩石地球化学通报》
CSCD
北大核心
2017年第6期920-926,共7页
Bulletin of Mineralogy, Petrology and Geochemistry
作者简介
马珊珊（1993-），女，硕士研究生，研究方向：裂缝预测及大数据．E-mail：mashanshan-cu@163．com;张旗（1937-），男，研究员，研究方向：埃达克岩、花岗岩和矿床学．E-mail：zql937@126．com．
