| 与海相火山作用有关的铁-铜-铅-锌矿床成矿系列类型及成因初探 |
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| 引用本文：.2001.A Preliminary Study on the Metallogenic Series Type of Fe-Cu-Pb-Zn Ore Deposits Related to Submarine Volcanism and Its Origin[J].Mineral Deposits,20(2):112~118 |
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| 基金项目:国家重点基础研究项目(G1999043203)和地质调查项目(K1. 4-3-4) |
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| 中文摘要:文章初步厘定了与海相火山作用有关的铁、铜、铅、锌矿床成矿系列类型的概念，并对其进行了分类，讨论了其成因，认为内生外成（沉）是其主要特征，即成矿物质主要由火山作用从深部提供，而矿石又是通过沉积作用在海底形成的。在一定程度上，可从成矿类型的角度将块状硫化物矿床与BIF型或磁铁石英岩型矿床联系起来考虑。该类矿床成矿系列类型的演化特点在一定程度上可以反映地球演化的历史轨迹。 |
| 中文关键词:矿床成矿系列类型 海相火山作用 块状硫化物矿床 层状氧化物矿床 |
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| A Preliminary Study on the Metallogenic Series Type of Fe-Cu-Pb-Zn Ore Deposits Related to Submarine Volcanism and Its Origin |
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| Abstract:This paper presents a concept of metallogenic series type of Fe-Cu-Pb-Zn mineral deposits related to submarine volcanism and deals briefly with its classification and genesis. This type of metallogenic series can be divided into seven subtypes: (1) Fe-Cu-Pb-Zn subtype related to basic volcanism in continental rift; (2) Fe-Cu-Co subtype related to basic volcanism in back-arc basin, which includes oxide mineral deposits such as the Shilutype Fe-Cu-Co deposit; (3) Pb-Zn-Cu-Fe subtype related to acidic volcanism at island arc or back-arc, consisting of sulfide mineral deposits such as the Gacun deposit in Sichuan, the Keketale deposit in Xinjiang, and the Shanghua-Yunpan deposit in Liaoning; (4) Fe-Cu-Pb-Zn subtype related to middle and basic volcanic rocks in epicontinental rift, comprising oxide deposits such as the Zhaokalong deposit in Sichuan, the Etouchang deposit and the Huimin deposit in Yunnan, sulfide deposits such as Tongyugou, Laochang, Tongkuangpo, Dongchuan, Huogeqi and Qingchengzi, and oxide-sulfide coexisting deposits such as Dahongshan, Lalachang and Chenjiamiao; (5) Fe-Cu-Pb-Zn subtype related to bimodal volcanism in epicontinental rift, embracing oxide mineral deposits such as Yudongzi and Gongchangling, and sulfide mineral deposits such as Ashele, Xitieshan, Honggou, Baiyinchang, Caozigou, Zhongtiaoshan, and Hongtoushan; (6) Fe-Mn-Cu-polymetallic subtype related to basic volcanism in ocean basin, made up of oxide deposits such as Fe-Mn nodule; (7) Fe-Cr-Cu-Zn subtype related to basic-ultrabasic volcanism in mid-ocean ridge, consisting of oxide deposits such as the Luobusha deposit in Tibet, and sulfide deposits such as the Yindonggou deposit, the Cyprus deposit and the De 'erni deposit. These kinds of Fe-Cu-Pb-Zn mineral deposits, formed at the bottom of seabasin or in rifting environment with ore-forming materials originating from a deep source by submarine volcanism, can be classified as the same type of metallogenic series. This concept can be used to study the relationship between submarine volcanogenic massive sulfide deposits and bedded oxided iron deposits or BIF type iron deposits. Massive sulfide deposits are usually distributed near exhalative vents, while oxide deposits are spread on the seabottom far away from the vent. The evolution characteristics of this type of metallogenetic series show a clue of the evolution history of the earth. For example, submarine volcanic rocks related to massive sulfide copper deposits formed at different stages show a trend of increasing initial Sr value from early to late, namely from 0. 703268~0. 703860 in Xiqiu ( Pti ; Huang Y. N.0.7075-0.7093 in 1992 ) to 0.705171~0.706453 in Baiyinchang ( E2, Ren Bincheng et al., 1992) to Ashele ( Li Huaqin et al. , 1998). |
| keywords:metallogenic series type of ore deposits, submarine volcanism, massive sulfide deposit, banded oxide deposit |
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