| 土屋-延东铜钼矿田与成矿有关问题的讨论 |
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| 引用本文：.2003.A Discussion on Problems Related to Mineralization of Tuwu-Yandong Cu-Mo Orefield in Hami, Xinjiang[J].Mineral Deposits,22(4):334~344 |
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| 基金项目:国家科技攻关项目(2001BA609A_07_18A)和国家973项目(G1999043201) |
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| 中文摘要:为查明新疆土屋-延东铜矿的围岩地层时代、成矿时代和成矿环境等问 题，文章通过野外调查、岩矿鉴定、古生物化石鉴定和同位素年代学等方面的研究，提出围 岩地层为石炭系而不是泥盆系；锆石SHRIMP定年结果表明334.6～320 Ma为围岩火山岩的形 成时代，另外还有两期岩浆活动(434～426 Ma和260 Ma)；含矿直接围岩主要是斜长花岗斑 岩而不是闪长玢岩；矿田隶属觉罗塔格构造_成矿带而不是哈尔里克带；矿田内斑岩类以及 矿带中的石炭纪花岗岩类具埃达克岩特征，表明区域上具良好的斑岩铜矿成矿远景。 |
| 中文关键词:地质学 成岩成矿时代 斑岩铜矿 埃达克岩 土屋-延东 新疆 |
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| A Discussion on Problems Related to Mineralization of Tuwu-Yandong Cu-Mo Orefield in Hami, Xinjiang |
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| Abstract:The Tuwu_Yandong Cu-Mo deposit is a super-large porphyry deposit discovered in r ecent years. Fossils indicate that the host rocks are of Carboniferous inste ad of Devonian. SHRIMP dating results of zircons from the host volcanic rocks gi ve three groups of data, in which the ages from 334.6 Ma to 320 Ma indicate the rock-forming epoch of host rocks, while the ages from 434 Ma to 426 Ma and the a ge of 260 Ma show other two epochs of magmatism. The host rocks of mineraliz ation are plagiogranitic porphyry rather than dioritic porphyry. The orefield is located in the Jueluotage tectonic-mineralization belt, not in the Haerlik belt . The adakite features of the porphyry rocks in the orefield and the Carbonifero us grani toids in this region suggest good prospects in search for porphyry_type copper d eposits in East Tianshan region. |
| keywords:geology, ore-forming and rock-forming ages, porphyry copper deposit, adakite, Tuwu_Yandong, Xingjiang |
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