megaporphyric

The Oulituozi and the Huangshatuo trachyte porphyry intrusions, that are separated less than 10 km apart, occur in the middle segment of the Eastern depression of the Liaohe basin and intrude in the Eocene carbonaceous and argillic hydrocarbon source beds of the third member of the Shahejie formation.

地球化学分析表明,两岩体均为粗面斑岩,成分非常一致,很可能在深部相连或来源于同一岩浆房。