维捷布斯克麻粒岩块体钻石鉴定标准及远景

V. Konishchev, Andrei M. Kovkhuto
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引用次数: 0

摘要

本文介绍了研究白俄罗斯境内构造结构中金刚石含量的历史。根据工业地质学家和科学家在过去50年中进行的磁力测量、矿物学和构造研究的结果,使用Clifford规则制定了新的科学证明的寻找爆炸管道的标准,根据该规则,金伯利岩爆炸管道在太古宙克拉通内发育,岩石圈厚度为175–270公里,在早元古代稳定和构造岩浆活化带中不存在。非洲-阿拉伯、东西伯利亚、中韩和东欧平台上的爆炸管表明,它们局限于太古代克拉通,可能与太古代克拉通下元古代海洋地壳的古俯冲带有关。基于此,作者科学地证实了这样一种假设,即在分隔芬诺斯堪的纳维亚克拉通与伏尔加-乌拉尔和萨尔马提亚克拉通的早元古代古海洋闭合期间,这些克拉通下方发生了年轻地壳的俯冲,白俄罗斯境内的西南角是维捷布斯克麻粒岩地块。文章得出的结论是,维捷布斯克麻粒岩地块是白俄罗斯境内最有前景的含金刚石地块,在其范围内——斯摩棱斯克区域深断层,位于该断层的东北走向与奥尔沙市南部的敖德萨-戈梅尔区域深断层的交汇处。提出了进一步研究有前景的地区以确定其钻石含量的建议。
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Criteries and prospects of diamonds of the Vitebsk granulite massif
The article describes the history of studying the diamond content of tectonic structures of the territory of Belarus. Based on the results of magnetometric, mineralogical, tectonic studies carried out by industrial geologists and scientists over the past 50 years, new scientifically substantiated criteria for the search for explosion pipes have been developed using Clifford’s rule, according to which kimberlite explosion pipes are developed within the Archean cratons, where the thickness of the lithosphere is 175–270 km, and are absent in the zones of Early Proterozoic stabilisation and tectonomagmatic activation. Explosion tubes on the African-Arabian, East Siberian, Sino-Korean and East European platforms demonstrate their confinement to the Archean cratons and may be associated with zones of paleosubduction of the Proterozoic oceanic crust beneath the Archean cratons. Based on this, the authors scientifically substantiated the hypothesis that during the closure of the Early Proterozoic paleoocean separating the Fenno-Scandinavian craton from the Volga-Ural and Sarmatian cratons, subduction of the younger crust took place under these cratons, the southwestern corner of which on the territory of Belarus is the Vitebsk granulite massif. The article concludes that the Vitebsk granulite massif is the most promising in terms of diamond-bearing on the territory of Belarus, and within its limits – the Smolensk regional deep fault at the intersection of this fault of northeastern striking with the Odessa-Gomel regional deep fault of submeridional striking south of the city of Orsha. Recommendations are given for further study of promising areas in order to determine their diamond content.
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审稿时长
12 weeks
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