大兴安岭莫尔道嘎地区新元古代巨斑状碱长花岗岩地球化学特征

详细信息

收稿日期: 2004-12-01

修回日期: 2005-03-22

刊出日期: 2005-09-30

GEOCHEMICAL CHARACTERISTICS OF NEOPROTEROZOIC LARGE-PORPHYRITIC ALKALI-FELDSPAR GRANITE IN MORDAGA AREA

Received Date: 01 December 2004

Revised Date: 22 March 2005

Publish Date: 30 September 2005

摘要: 莫尔道嘎地区巨斑状碱长花岗岩是额尔古纳地块最早的岩浆活动的产物.对巨斑状碱长花岗岩的地质学、岩石地球化学特征进行了阐述,确定岩体形成于新元古代,属同碰撞期陆壳改造型钙碱性花岗岩.认为自新元古代开始,额尔古纳地块进入了强烈碰撞增生演化阶段.
- 巨斑状碱长花岗岩 /
- 同碰撞期 /
- 新元古代 /
- 额尔古纳地块 /
- 莫尔道嘎地区
Abstract: The large-porphyritic alkali-feldspar granite in Mordaga area is the product of the first magmatic activity of Ergun block. Study on the geological and geochemical characteristics of the large-porphyritic alkali-feldspar granite shows that the batholith was formed in Neoproterozoic Era during the continental crust evolution in syn-collision setting. From then on, the Ergun block started its intense collision-accretion period.
- large-porphyritic alkali-feldspar granite /
- syn-collision stage /
- Neoproterozoic /
- Ergun block /
- Mordaga area