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| A preliminary study on the metallogenic regularity of rare metal mineral resources of granitic pegmatite type in Shangdan area, Shaanxi Province |
| Received:September 10, 2018 Revised:September 10, 2018 |
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| DOI： |
| KeyWord:rare metal; metallogenic regularity; Shaanxi province; Shangdan area |
| Author | Institution |
| 杨文博 |
陕西省地质调查院 |
| 周海 |
西北大学地质学系 |
| 宋公社 |
陕西省地质调查院 |
| 吴鹏 |
陕西省地质调查院 |
| 王强 |
陕西省地质调查院 |
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| Abstract: |
| Rare metal deposits in Shaanxi, China are mainly in Qinba area, and the main metallogenic type is pegmatite type. Most of previous studies are focused on pegmatite concentrated area of Shangnan and Danfeng counties (Shangdan for short).The rare metals mineralizations in this area are mainly rubidium and niobium (tantalum), secondly lithium, strontium, beryllium, etc and the metallogenesis of pegmatite type rare metals is controlled by the conditions of regionalSstructural, structural joint fissures and its country rocks. The pegmatite type rare metal mineral deposits in Shangdan region are located in the southern margin of the North Qinling Orogenic belt. The mineralization period is mainly in the early Paleozoic. Most of the pegmatites in this area exhibit a certain extent of zoning features in their own structure and the regional distribution. Moreover, the parent rock of the pegmatites can be found. Through the investigation of the two typical oreSdeposits, we can know that the mineralization and enrichment of rubidium has no relationship with the zoning characteristics of pegmatite but is closely related to Rb-rich feldspar and muscovite in pegmatites. While other rare metal mineral deposits including lithium, niobium, tantalum, beryllium, etc. have their own independent minerals and thus their mineralizations are closely related to the zoning characteristics, and are mostly distributed in the marginal zones or the surrounding areas of the parent rocks with strong differentiation. Thus,the characteristics of the parent rock, regional structure, rock type of host rock, mineral type, alteration, primary halo, geochemical and heavySplacerSmineral anomalies are the important indicators for the Rare metal deposits in the Shangdan area of Shaanxi province. |
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