Spatial Variability of Composition of Mesozoic Volcanic Rocks and Metallogenic Regularity in
详细信息
- 责任者：Wang Jianxin (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Zhang Junhua
- 刊名：Journal of Jilin University
- 出版年：2010
- 卷期：40(4)
- 关键词：火山岩 ; volcanic rocks ; 东北地区 ; Northeast China
- 页码：p.752-763
- 图表：3 illus., 5 tables, 36 refs.
- 分类号：0801
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
///According to diagenetic epoch, composition, associated deposit types and metallogenic ages, the Mesozoic volcanic rocks in Northeast China can be divided into three volcanic belts. The diagenetic epoch of the western and southern volcanic belts change from 150 to 120 Ma and from 205 to 112 Ma, respectively. Volcanic rocks in both belt are potassium-rich alkaline-subalkaline trachybasalt-trachyandesite-trachyet, metallogenic epoch of the western belt change from 140 to 130 Ma. Metallogenic epoch of the southern concentrates in 200 to 108 Ma. There is a close relationship between mineralization and subvolcanic-hypabyssal granitic rocks. Mineral resources mainly contain silver, lead, zinc, copper, molybdenum and other polymetallic series. The diagenetic epoch of the eastern volcanic belts varies from 140 to 110 Ma, and the vocanic rocks mainly include potassium alkaline-subalkaline trachyandesite, trachyet, andesite, dacite, rhyolite. The metallogenic epoch changes from 130 to 110 Ma. Gold and polymetallic mineralization have genetic relationship with subvolcanic and hypabyssal dioritic rocks. Based on the comparison of typical gold deposits in NE China, the prospecting direction of gold is also discussed.
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