| 北岔沟门中生代岩浆侵入作用成矿系统 |
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| 关键词:Mesozoic intrusive rock zircon U-Pb age Beichagoumen |
| 基金项目:国土资源部资源与环境科技攻关项目(编号:950200302) |
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| Mesozoic Intrusive Magmatism-Related Metallogenetic System in Beichagoumen Area |
| TIMS U-Pb ages of the distinctive Mesozoic hypabyssal intrusions in Beichagoumen area of northern Hebei are presented in this paper,together with a discussion on their metallogenetic significance. These Mesozoic hypabyssal intrusions consist of dioritic porphyrite,monzonitic porphyry,amphibole biotite monzonite and granodiorite porphyry,and the last three sorts of intrusive rocks have TIMS U-Pb ages of 147.6±1.6 Ma,146.2±1.4 Ma and 146.2±3.9 Ma,respectively,which represent their formation ages. The formation of Beichagoumen gold-and silver-bearing polymetallic ore deposit is closely related to the development of these hypabyssal intrusions in time,space and genesis,thus making up a typical metallogenetic system of Mesozoic hypabyssal intrusive magmatism along the northern margin of North China platform. |
| CHEN Zhi-hong,MAO De-bao,ZUO Yi-cheng,LI Hui-min,ZHONG Chang-ting,XIANG Zhen-qun.2004.Mesozoic Intrusive Magmatism-Related Metallogenetic System in Beichagoumen Area[J].Acta Geoscientica Sinica,25(2):224-228. |
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