俄罗斯东北部 Balygychan-Sugoy 河槽低温成岩条件下大河谷溪流沉积物取样的特点

IF 1.4 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Artem S. Makshakov, Raisa G. Kravtsova
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引用次数: 0

摘要

为了提高在低温成岩条件下形成的溪流沉积物(SSs)的地球化学勘测效率,开展了综合研究。作者分析了通过 IV 级大河谷 SSs 发现的外源异常地球化学场(AGF)的组成、结构和形成的具体特征。在我们的案例中,这些河谷是马利肯河谷、肯河河谷和塔普河河谷。这些河流位于俄罗斯东北部马加丹地区所包围的 Balygychan-Sugoy 河槽的中部和南部。作者提出了一种新技术,在沿剖面的大河谷中对 SS 的松散冲积层进行取样。剖面横跨河谷。研究了金、银、铅、锌、锡、铋、钼和钨的 AGFs。元素之间的相关性已经确定。这些元素是研究地点发生的金-银、银-铅、锡-银、钼-钨和锡-钨矿化的主要指示元素。研究结果与 SSs 地球化学调查的结果进行了比较。结论是,沿剖面确认的 AGF 反映了侵蚀和排水矿带的成分和结构,完整而准确地揭示了大水流松散沉积物中的元素分布模式。从实际意义上讲,0.25 毫米的冲积物部分似乎最为重要,因为它集中了大量的矿石元素。在 IV 级河谷中对这一部分取样并不困难,因为这类材料非常丰富。所开发的大河谷冲积层取样技术可在预探矿的各个阶段有效地寻找各种矿化物。该技术适用于在俄罗斯东北部以及其他气候条件类似的地区对 SSs 进行不同规模的地球化学勘测,因为 SSs 是在低温成岩条件下形成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Features of sampling stream sediments of large river valleys under cryolithogenesis conditions in the Balygychan–Sugoy trough, North–East of Russia

Comprehensive research has been implemented to raise the efficiency of the geochemical survey of stream sediments (SSs) that formed under the cryolithogenesis conditions. The authors analysed the composition, structure and specific features of the formation of exogenous anomalous geochemical fields (AGFs) identified through SSs of large river valleys of IV order. In our case, these were the valleys of Maly Ken, Ken and Tap Rivers. These rivers are located in the central and southern parts of the Balygychan–Sugoy trough enclosed in the Magadan region, North–East of Russia. The authors proposed a new technique to sample loose alluvium of SSs in the large river valleys along the profiles. The profiles were located across the valleys. The AGFs of Au, Ag, Pb, Zn, Sn, Bi, Mo and W were studied. Correlations between elements have been established. These elements are the main indicator elements of Au–Ag, Ag–Pb, Sn–Ag, Mo–W and Sn–W mineralization occurring on the sites under study. The results obtained were compared with the results of geochemical surveys of SSs. It is concluded that the AGFs recognized along the profiles reflect the composition and structure of eroded and drained ore zones, uncover completely and precisely the pattern of element distribution in loose sediments of large water flows. The alluvium fraction < 0.25 mm seems to be most significant in a practical sense, as it concentrated numerous ore elements. Sampling of this fraction in the river valleys of IV order does not cause any difficulty, for this kind of material is plentiful. The developed technique of alluvium sampling within large river valleys is efficient in searching for diverse mineralization at all stages of prognostic prospecting. It is applicable for geochemical survey of SSs performed at different scales both in the North–East of Russia, as well as other regions with similar climatic conditions, where the SSs are formed under the cryolithogenesis conditions.

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来源期刊
Acta Geochimica
Acta Geochimica GEOCHEMISTRY & GEOPHYSICS-
CiteScore
2.80
自引率
6.20%
发文量
1134
期刊介绍: Acta Geochimica serves as the international forum for essential research on geochemistry, the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth‘s crust, its oceans and the entire Solar System, as well as a number of processes including mantle convection, the formation of planets and the origins of granite and basalt. The journal focuses on, but is not limited to the following aspects: • Cosmochemistry • Mantle Geochemistry • Ore-deposit Geochemistry • Organic Geochemistry • Environmental Geochemistry • Computational Geochemistry • Isotope Geochemistry • NanoGeochemistry All research articles published in this journal have undergone rigorous peer review. In addition to original research articles, Acta Geochimica publishes reviews and short communications, aiming to rapidly disseminate the research results of timely interest, and comprehensive reviews of emerging topics in all the areas of geochemistry.
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