摘要
本文根据新近资料分析冀东北地区的大地构造演化规律对金矿成矿规律的控制作用.由于该区的地壳经过前地槽、地槽、地台和地洼四大不同发展阶段,因而在不同大地构造发展阶段中形成不同的金矿类型:前地槽阶段形成含金矿源层;地槽发展阶段,由于多期混合岩化、多期变质分异和侧分泌作用使矿源层中的金矿质富集溶移而在扩容构造中充填和交代形成变质热液型金矿床,地洼发展阶段,由于古地台的构造岩浆活化解体,在巨厚的的地槽构造层的基底上形成大量的岩浆热液型金矿床和叠加(再造)富化型金矿床.
The author analyses the control of tectonic evolution on the gold mineralization of Northeast Hebei Province according to recomt data. The tectonic evolution of the region has undrergone four different stages: pregeosyncline, geosyncline, platform and diwa, consequently forming different types of gold deposits. In the pregeosyncline stage, the gold-bearing source bed was formed. In the geosyncline stage, polyphasic migmatization, polyphasic metamorphic differentiation and lateral secretion have made the gold in the source bed rich, fill the cavities and experience metasomasis in dilatant structures, forming metamorphic-hydrothermal type gold deposits. In the diwa stage, tectono-magmatic activization of the platform has brought about magmatic-hydrothermal and superposed enrichment types of gold deposits on the base of the huge pregeosyncline tectonic layer.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1992年第4期355-365,共11页
Geotectonica et Metallogenia
关键词
金矿床
成矿规律
大地构造
演化
source bed, metamorphic hydrothermal, magmatic hydrothermal, gold deposit, Northeast Hebei Province.
