松嫩地块北缘新元古代花岗岩类构造环境的地球化学研究

详细信息

收稿日期: 2001-03-15

GEOCHEMICAL STUDY ON TECTONIC SETTING FOR NEOPROTEROZOIC GRANITOIDS, NORTHERN MARGIN OF SONGNEN MASSIF, CHINA

Received Date: 15 March 2001

摘要: 花岗岩类岩石学和地球化学特征研究表明,松嫩地块北缘新元古代花岗岩类具有典型的板块会聚边缘型岩石组合和正序列岩浆演化系列。其中科洛岩体形成于活动陆缘环境,属Ⅰ型花岗岩;双合岩体形成于板块碰撞同期,属S型花岗岩;而九头山单元和柳屯单元则分别形成于造山期后和大陆造陆上升阶段。这一构造-岩浆作用暗示着松嫩地块北缘在新元古代板块构造体制就开始运行。
- 花岗岩类 /
- 构造环境 /
- 新元古代 /
- 松嫩地块北缘
Abstract: The characteristics of granitoids petrology and geochemistry in the north margin of Songnen Massif indicates that the Neoproterozoic granitic bodies have typical rock association and ortho-succession magmatic evolution series belonging to convergent plate boundary. The Keluo pluton is I-type granite and formed in a tectonic setting of the continental arc. The Shuanghe pluton is S-type granite and formed in the zone of the intercontinental collision. The Jiutoushan and the Liutun units formed in post-orogenic and epeirogenic uplift periods, respectivly. The tectonic magmatism suggests that the plate tectonics had operated in the north margin of Songnen Massif in the Neoproterozoic.
- granitoid /
- tectonic setting /
- Neoproterozoic /
- north margin of Songnen Massif