Geological Characteristics and Prospecting Targets of the Qagan Obo Fe-Zn Polymetallic Deposit in Inner Mongolia
详细信息
- 责任者：Chang Chunjiao (Institute of Gold Geology ; CAPF ; Langfang 065000 ; China) ; Cong Runxiang
- 刊名：Geology and Resources
- 出版年：2013
- 卷期：22(5)
- 关键词：铁矿 ; iron ores ; 锌矿 ; zinc ores ; 内蒙古 ; Inner Mongolia
- 页码：p.371-375
- 图表：1 illus., 1 table, 14 refs.
- 分类号：1001
- issnNo：ISSN1671-1947
- isbnNo：CN21-1458/P
摘要
The Qagan Obo Fe-Zn polymetallic deposit tectonically lies in the eastern part of the Early Paleozoic Qagan Obo-Aoyoute-Chaobuleng tectonomagmatic belt. The Middle Ordovician Duobaoshan Formation, serving as the main host,is closely related to the metallogenesis. The skarn zones with Fe-Zn and Mn layers commonly occur at the contact between Qagan Obo quartz diorite stock and the neritic facies sedimentary rocks of Duobaoshan Formation. The Fe-Zn orebodies are mainly hosted by the skarn in stratiform, banded or lenticular shapes. The Qagan Obo quartz diorite stock supplies not only the ore materials, but also the ore-forming fluid and dynamic. The regional NE-striking Qagan Obo-Dongwuqi deep fault controls the occurrences of rock bodies and polymetallic deposits. The secondary NE- and NW-trending fractures control the distribution Fe-Zn orebodies. The favorable areas for seeking Fe-Zn polymetallic deposits are the contact zones between the multi-staged acid-intermediate magmatic intrusions and the neritic facies sedimentary rocks of Middle Ordovician Duobaoshan Formation and the concentrated fissure belts in the wallrocks.