| 辽宁营口后仙峪硼矿区超镁橄榄岩的控矿作用 |
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| 引用本文：.2006.Ore-control role of ultra-magnesium peridotite in Houxianyu boron ore district, Yingkou, Liaoning Province[J].Mineral Deposits,25(6):683~692 |
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| 基金项目:国家自然科学基金项目（40073013） |
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| 中文摘要:为了研究辽宁营口后仙峪硼矿区超镁橄榄岩与硼矿的关系，作者通过 硼矿与超镁橄榄岩两者在产出空间关系、岩石学和地球化学方面的比较，发现：①硼矿体与 超镁橄榄岩空间关系上具一致性；②硼矿体与超镁橄榄岩在岩石学上具继承性；③硼 矿石、超镁橄榄岩的地球化学特征具相似性，从而得出超镁橄榄岩不仅是该区硼矿的容矿岩 石，而且对硼矿的形成有决定性的岩控作用，进一步认为辽东硼矿的容矿岩石不全是镁质大 理岩，其他富镁岩石在一定条件下也可成为硼矿的容矿岩石。 |
| 中文关键词:地质学 硼矿 超镁橄榄岩 控矿作用 后仙峪 辽宁 |
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| Ore-control role of ultra-magnesium peridotite in Houxianyu boron ore district, Yingkou, Liaoning Province |
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| Abstract:Located in Yingkou of Liaoning Province, the Houxianyu boron deposit is of the s uanite_szaibelyite type, with the host rock being the serpentinized and magnesit ized ultra_magnesium peridotite. A comparison of spatial relationship, petrology and geochemistry between the boron deposit and the ultra_magnesium peridotite has led to the following conclusions：(1) the ore bodies have the same spatial relationship with the ultra_magnesium peridotite, because the boron bodies are h osted in the ultra _magnisium peridotite and magnesite marble in lamellar, lame llated and lentoid forms；(2) the ores show inheritance relationship with the ul tra_magnesium peridotite in mineral formation, texture and structure. The metaso matic relict texture and the metasomatic pseudomorphic texture find expression i n the metasomatic relationship of szaibelyite with forsterite, serpenite and ear ly ore minerals. The relict structure is obvious, and such structures as the bla sto_nodule structure，the blasto_ball structure，the jet brecciated structure, t he blasto_banded structure, the brecciated structure, the anti_brecciated struct ure，the granophyric structure, and the tripod structure all have to do with the ultra_magnisium peridotite and serpenitinized peridotite；(3) the ores show inh eritance in geochemistry, especially in REE. The boron ores and the ultra_magnis ium peridotite both show magnesium-rich, iron-rich and boron-rich characteristic s, and also show close relationship in the evolution of rock formation. They are similar in trace elements. They have the same kinds and contents of trace eleme nts, and their features of evolution are similar. They are consistent in REE evo lution, and both have the "V" type REE pattern. It is thus held that the ultra-m agnisium peridotite not only is one kind of host rocks, but also controls the ch aracteristics of the boron ores in the boron deposit. In addition, magnesium mar ble is not the only host rock in eastern Liaoning_southern Jilin boron deposits and other magnesium_rich rocks can also serve as the host rocks of boron deposi ts under certain conditions. |
| keywords:geology, boron deposit, ultra-magnesium peridotite, metallogenic activity, Houxianyu,Liaoning Province |
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