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X-ray computed tomography study for drill core of the Drazhnoe orogenic-type gold deposit (Sakha (Yakutia), Russian Federation) 俄罗斯萨哈(雅库特)地区Drazhnoe造山型金矿岩心x射线计算机断层成像研究
Ores and metals Pub Date : 2022-01-10 DOI: 10.47765/0869-5997-2021-10027
V. Chikatueva, N. Stepanov, A. Chitalin, D. Korost
{"title":"X-ray computed tomography study for drill core of the Drazhnoe \u0000orogenic-type gold deposit (Sakha (Yakutia), Russian Federation)","authors":"V. Chikatueva, N. Stepanov, A. Chitalin, D. Korost","doi":"10.47765/0869-5997-2021-10027","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10027","url":null,"abstract":"Orogenic gold-quartz deposits have a clear structural \u0000control and are accompanied by wallrock metasomatic \u0000alteration. However, in detailed modeling of such deposits, \u0000there is often a mismatch between the structural \u0000plans for high-grade ore zone distribution and metasomatite \u0000zones, and the latter are not always associated \u0000with faults. This is explained by the evolution of the hydrothermal \u0000process and the pulsating nature of the development \u0000of the territory. In the early stages of the mineral \u0000deposit study, it is very important to reliably determine \u0000the distribution of ore zones, since the correct targeting \u0000of the drilling program and the economic deposit \u0000assessment depend on it. The problem can be solved using \u0000the method of X-ray computed tomography (СТ) in the \u0000core study. \u0000This paper presents the methodology of studying fullsize \u0000core samples of gold deposits by using CT. A core \u0000sample characterizing the central part of ore body of \u0000Drazhnoye deposit (Tarynskoye ore field, Republic of Sakha \u0000(Yakutia)) was used as the study material. The sample \u0000studied was scanned by a SIEMENS Somatom Perspective \u0000tomograph at two energies (80 and 130 keV). As \u0000a result, a detailed three-dimensional stereological model \u0000of the core was obtained, which made it possible not \u0000only to study the distribution of ore minerals in the volume \u0000of the entire sample, but also to identify vein bodies \u0000of different ages, as well as to study their morphology \u0000and trace the distribution patterns of ore mineralization \u0000in them. Based on the study results, we can offer a \u0000preliminary interpretation of ore mineralization and \u0000vein formation sequence.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90383669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gold and silver accessory minerals in ultramafites of the Kyzyr-Burlyuksky ultramafic massif (Western Sayan) 西萨延Kyzyr-Burlyuksky超镁质地块超镁铁中金银辅助矿物
Ores and metals Pub Date : 2022-01-10 DOI: 10.47765/0869-5997-2021-10031
A. Yurichev
{"title":"Gold and silver accessory minerals in ultramafites \u0000of the Kyzyr-Burlyuksky ultramafic massif (Western Sayan)","authors":"A. Yurichev","doi":"10.47765/0869-5997-2021-10031","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10031","url":null,"abstract":"The study focuses on gold and silver accessory minerals \u0000(native silver, cuprous gold, luanheite (Ag3Hg), \u0000unspecified mineral phase (Cu,Ag,Hg), first diagnosed \u0000in dunites and apodunite serpentinites of the Kyzyr-Burlyuksky \u0000ultramafic massif, which is part of the Kurtushibin \u0000ophiolite belt of Western Sayan. The revealed \u0000ore minerals are mainly observed in the form of single \u0000hypidiomorphic, irregular microscopic precipitates (0.5– \u00003.0 μm) mainly inside magnetite, much less often in \u0000grains of avaruite. Typomorphic and chemical features \u0000of ore minerals, their natural setting in rock-forming \u0000silicate matrix are characterized. Formation and concentration \u0000of these accessory minerals is associated with \u0000superimposed low-temperature transformation (hydration) \u0000processes affecting original ultramafic rocks. At the \u0000same time, the presence of luanheite and an unnamed \u0000phase (Cu,Ag,Hg), along with the previously identified \u0000potarite (PdHg), is probably evidence of low-temperature \u0000conditions of mineral formation during the manifestation \u0000of epigenetic processes of serpentinization (lowgrade \u0000metamorphism) due to solutions enriched in mercury. \u0000The source of such solutions could be gabbro intrusions \u0000that penetrated later into the main ultramafic body.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77434206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The role of plicative structures as forecast criteria in the Alakit-Мarkhinsky field (western Yakutia) 应用结构在Alakit-Мarkhinsky油田(西雅库特)作为预测标准的作用
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-10014
D. Ivanov, A. Tolstov, V. Ivanov
{"title":"The role of plicative structures as forecast criteria in the Alakit-Мarkhinsky field (western Yakutia)","authors":"D. Ivanov, A. Tolstov, V. Ivanov","doi":"10.47765/0869-5997-2021-10014","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10014","url":null,"abstract":"This paper describes the tectonic features of the Alakit-Markha kimberlite field, regional factors of kimberlite magmatism control in this area, structural and tectonic preconditions for kimberlite pipe prospecting. The paper highlights kimberlite pipe formation features and the role of tectonics in this process. The most promising areas are those related to low-amplitude negative structures (e.g. depressions), especially transverse low-amplitude complications of the opposite sign for the main plicative structure: for antiforms (elevations), these are saddle-shaped depressions, and antiform elevations are for synforms (depressions).","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"113 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73273697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Unaltered kimberlite of Internationalnaya pipe (Mirny field) 国际纳亚管道(米尔尼油田)未改变的金伯利岩
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-10022
Bogdan Pomazansky, R. Monkhorov, T. Antonova, V. Malkovets, A. Kulagin, Marina Shalkina, Viktoria Batyr, A. Sobakin
{"title":"Unaltered kimberlite of Internationalnaya pipe (Mirny field)","authors":"Bogdan Pomazansky, R. Monkhorov, T. Antonova, V. Malkovets, A. Kulagin, Marina Shalkina, Viktoria Batyr, A. Sobakin","doi":"10.47765/0869-5997-2021-10022","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10022","url":null,"abstract":"The porphyry kimberlite block (intrusive coherent kimberlite, after Scott-Smith, 2013) on the deep horizons of the Internationalnaya pipe is characterized by the lack of olivine macrocryst serpentinization, and the minimum degree of postmagmatic alteration in the matrix minerals. Garnet keliphitization and the composition of olivine and phlogopite outer zones are due to the interaction of deep minerals and the surrounding kimberlite melt at depth. The rapid melt crystallization contributed to the heterogeneous magma structure represented by the macrocryst (porphyry) and aphyric schlieren.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"163 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75966256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diamonds of Russia's «midnight lands» 俄罗斯“午夜土地”的钻石
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-10019
V. Karzhavin
{"title":"Diamonds of Russia's «midnight lands»","authors":"V. Karzhavin","doi":"10.47765/0869-5997-2021-10019","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10019","url":null,"abstract":"Carbon and carbon-rich organics were identified throughout the Kola peninsula. Based on petrological and geochemical study of basic and ultrabasic rock metamorphism, diamond occurrences are assumed in the northwestern Kola peninsula.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88932510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polyphase nature of Grib pipe formation and its manifestation in paleomagnetic rock properties and sieve diamond characteristics Grib管地层多相性及其在古地磁岩石性质和筛金刚石特征中的表现
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-10021
Roman Pendelyak
{"title":"Polyphase nature of Grib pipe formation and its manifestation in paleomagnetic rock properties and sieve diamond characteristics","authors":"Roman Pendelyak","doi":"10.47765/0869-5997-2021-10021","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10021","url":null,"abstract":"Paleomagnetic pipe rock properties and sieve diamond characteristics are discussed. To determine paleomagnetic characteristics, 59 samples (41 kimberlites and 18 xenotuff breccias) were taken from pipe rocks in 2019- 2020. Based on analysis results and the obtained data comparison, reasons of magnetic anomaly epicenter shift are validated and polyphase nature of Grib pipe formation is proved. The results suggest complex pipe structure with abnormally magnetized kimberlites. They could be the main anomaly, a focus of early prospecting, which resulted in the pipe discovery. Their location, mostly in the central and eastern pipe combined with primarily east-trending residual magnetization, can account for the eastward anomaly shift and partly beyond the pipe contour. Polyphase pipe nature is also confirmed by various sieve characteristics of diamonds from the orebody.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88995794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ratio of structural impurity distribution in diamond crystals and kimberlite pipe diamond potentiak (case study of Arkhangelsk region and Yakutia) 钻石晶体中结构杂质分布与金伯利岩管状钻石电位的比值(以阿尔汉格尔斯克地区和雅库特地区为例)
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-10023
G. Khachatryan, N. Anashkina
{"title":"Ratio of structural impurity distribution in diamond crystals and kimberlite pipe diamond potentiak (case study of Arkhangelsk region and Yakutia)","authors":"G. Khachatryan, N. Anashkina","doi":"10.47765/0869-5997-2021-10023","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10023","url":null,"abstract":"IR spectroscopy was used to compare diamonds from 12 pipes, Arkhangelsk region. Based on positive correlation between average N and H values in diamonds from various deposits, it was found that crystals from low-grade diamond pipes are relatively enriched in hydrogen compared with diamonds from Lomonosov and Grib deposits. In terms of structural impurity distribution, Arkhangelsk deposit diamonds differ from Yakutian diamonds; it could be due to various composition of compared diamonds’ source matter and thermodynamic conditions of their growth. It is shown that hydrogen is a negative factor of diamond potential in both Yakutian and Arkhangelsk diamonds. This can partly be explained by impuri-ty blocking effect on diamond crystal growth.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78385981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Drag folds in sedimentary rocks hosting kimberlites, West Yakutia 西雅库特，含金伯利岩的沉积岩中的拖曳褶皱
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-10020
P. Ignatov, N. Zaripov, Konstantin Novikov, A. Tolstov
{"title":"Drag folds in sedimentary rocks hosting kimberlites, West Yakutia","authors":"P. Ignatov, N. Zaripov, Konstantin Novikov, A. Tolstov","doi":"10.47765/0869-5997-2021-10020","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10020","url":null,"abstract":"Drag folds were revealed in Lower Paleozoic sedimentary strata of Mirny, Nakyn and Syuldyukar diamondiferous fields, West Yakutia. They consist of minor anticlinal forms (3-5 to 15-20 cm thick) and cut marl, clayey limestone and dolomite bands located between monolith seams of carbonate rocks. Some folds as monocline, flexures and S- or Z-shaped folds reflect the degree of shearrelated interlayer offset. Drag folds are among shear zone occurrences including microfaults, slickensides with slip groove horizontal planes, and schistosity zones. Drag folds reflect local extension points while schistosity zones indicate compression points. For Syuldyukar field, detailed mapping results for drag folds and schistosity zones are provided at 3 scales: across 20 × 20 m observation grid within a local 2 km2 site; across 200 × 200 m grid within 20 km2 area; across 500 × 500 m grid within ~100 km2 territory. For all scales, drag fold halos are restricted to schistosity zones. Within a local site adjacent to kimberlites, drag folds mark ore-hosting fault controlling long axes of kimberlite areal projections. Within large areas, drag fold halos are 1,2-2 km, which compares with kimberlite group areal parameters. Drag fold halos reflect shear junctions, with some of them hosting kimberlites. Local occurrences of drag folds mark a major shear hosting a kimberlite body. Drag fold analysis combined with other evidence should be used as an indirect prospecting indicator of concealed shears and local extension areas controlling kimberlites.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81122854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prospects for diamond potential of the Charo-Sinskaya fault zone Charo-Sinskaya断裂带金刚石远景展望
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-10017
A. Tolstov, L. Maksimkina, A. Kolesnik, Vadim Abramov, N. Antonova
{"title":"Prospects for diamond potential of the Charo-Sinskaya fault zone","authors":"A. Tolstov, L. Maksimkina, A. Kolesnik, Vadim Abramov, N. Antonova","doi":"10.47765/0869-5997-2021-10017","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-10017","url":null,"abstract":"New data on the geological structure of the CharoSinskaya zone of deep faults located on the southern side of the Vilyui syneclise are presented. Based on the processing of the seismic survey results, the deep structure of the territory has been analyzed, and graben-like structures similar to those found near the known kimberlite fi lds of Yakutia have been identifi d. Taking into account the results on the mineralogy of the indicator minerals of kimberlite, a new kimberlite field location is predicted.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"183 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80442324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diamond study features in forecasting and prospecting (Siberian platform) 金刚石预测找矿研究特点(西伯利亚地台)
Ores and metals Pub Date : 2021-11-03 DOI: 10.47765/0869-5997-2021-100018
N. Zinchuk, L. Bardukhinov
{"title":"Diamond study features in forecasting and prospecting (Siberian platform)","authors":"N. Zinchuk, L. Bardukhinov","doi":"10.47765/0869-5997-2021-100018","DOIUrl":"https://doi.org/10.47765/0869-5997-2021-100018","url":null,"abstract":"Based on the completed research and data summary on diamonds specific features (an example from the Siberian platform), conclusions were made that indications exist at all levels of their location: from kimberlite-related provinces, subprovinces, fields, diatremes to ore shoots. Population of diamond varieties in kimberlite rocks forms parasteric, rather than paragenetic, associations related to their coexistence in kimberlites. Morphological criteria of kimberlite diamond potential were defined depending on rounded diamonds content in them. Significant differences in kimberlites diamond potential were not revealed to the explored depth of diatremes. A conclusion about the absence of horizontal concentric zonality in the change of diamond typomorphic features was made.","PeriodicalId":19636,"journal":{"name":"Ores and metals","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88014260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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