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REE distribution in sequential leached phases from deep-sea polymetallic nodules and sediments 深海多金属结核和沉积物连续浸出相中的 REE 分布
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.105
A. Hikov, Z. Milakovska, Valentina Lyubomirova, Nadezhda Lihareva
{"title":"REE distribution in sequential leached phases from deep-sea polymetallic nodules and sediments","authors":"A. Hikov, Z. Milakovska, Valentina Lyubomirova, Nadezhda Lihareva","doi":"10.52215/rev.bgs.2023.84.3.105","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.105","url":null,"abstract":"The distribution of main elements and REE in sequential leached phases from deep-sea polymetallic nodules and sediments from the eastern part of the Clarion-Clipperton fractures zone, NE Pacific are studied. Results show extraction of Mn in the leach 2 in both nodules and sediments. The extraction of Fe, P and REE is different for leach 2, 3 and residual fraction for nodules and sediments. Phosphorous and REE have strong positive correlation which suggests that the phosphate component is the main important carrier of REE in both nodules and sediments but Fe-Mn oxyhydroxides and clay minerals cannot be excluded as carriers of REE.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"48 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139192606","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
Conodont biostratigraphy, carbonate microfacies and climate changes during the Late Devonain (Frasnian–Famennian) in the Preslavtsi 2 well (Moesian Terrane, NE Bulgaria) 普雷斯拉夫齐 2 号井（保加利亚东北部莫埃西亚地层）泥盆系晚期（弗拉斯年-法门年）的冠齿生物地层学、碳酸盐微地貌和气候变化
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.165
I. Boncheva, P. Andreeva, V. Sachanski
{"title":"Conodont biostratigraphy, carbonate microfacies and climate changes during the Late Devonain (Frasnian–Famennian) in the Preslavtsi 2 well (Moesian Terrane, NE Bulgaria)","authors":"I. Boncheva, P. Andreeva, V. Sachanski","doi":"10.52215/rev.bgs.2023.84.3.165","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.165","url":null,"abstract":"Five conodont zones (falsiovalis, rhenana, triangularis, marginifera, and praesulcata) were recognized within the Upper Devonian carbonate sequence in the Preslavtsi 2 well from the Moesian Terrane in NE Bulgaria. Microfacies study indicates a climate change (from the Subtropical Arid to the Warm Temperate Climatic Zones) recorded in the Frasnian–Famennian succession. Thus, during the Givetian and early Frasnian, sedimentation took place in an arid tidal flat setting, where microbial mats and lagoon carbonates have been formed. In the late Frasnian, a transgression, followed by a rapid regression was recorded that are presumably related to the Late Devonian Kellwasser event. At the beginning of the Famennian, a climate change has occurred and various shallow- and open-marine carbonates have been formed under warm temperate climate conditions.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"34 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193777","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
Temperature gradient along the northern slope of the Western Rhodopes 西罗多佩山脉北坡的温度梯度
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.249
Simeon Matev, Petko Bojkov, Dimitar Krenchev, Nina Nikolova
{"title":"Temperature gradient along the northern slope of the Western Rhodopes","authors":"Simeon Matev, Petko Bojkov, Dimitar Krenchev, Nina Nikolova","doi":"10.52215/rev.bgs.2023.84.3.249","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.249","url":null,"abstract":"The article examines the values of the vertical temperature gradient along the northern slope of the Western Rhodopes Мountain. The average monthly temperatures in three stations located between 290 and 1535 m a.s.l. were used as the basis of the calculations. Calculations were made for the following temperature indicators: monthly average, average minimum and average maximum, and absolute minimum and absolute maximum. The study covers the period July 2022 – August 2023. The values of the vertical temperature gradient are greatest in the summer and smallest in the autumn-winter period. In the lower part of the studied territory, in winter the gradient also has negative values, due to temperature inversions, and in summer its values are three times greater than in the upper part, due to the greater turbulence of the atmosphere.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"20 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193851","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
From pluton intrusion to its exhumation: a case study from Barnard Point Batholith, Livingston Island, South Shetland Archipelago, Antarctica 南极洲南设得兰群岛利文斯顿岛巴纳德角岩浆岩从侵入到喷出的案例研究
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.89
Stoyan Georgiev, Eleonora Balkanska, Stefan Velev, Stefan Metodiev, Neven Georgiev, M. Guillong, Sergiy Kurylo
{"title":"From pluton intrusion to its exhumation: a case study from Barnard Point Batholith, Livingston Island, South Shetland Archipelago, Antarctica","authors":"Stoyan Georgiev, Eleonora Balkanska, Stefan Velev, Stefan Metodiev, Neven Georgiev, M. Guillong, Sergiy Kurylo","doi":"10.52215/rev.bgs.2023.84.3.89","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.89","url":null,"abstract":"Three samples from the main phase of the Barnard Point Batholith of granodiorite from the sea level up to 463 m of Mac Kay Peak – are analyzed. The U-Pb zircon geochronology reveals magmatic crystallization at 43.89±032 Ma. The Ca-amphibole thermobarometry shows a shallow crustal level emplacement (5–3.5 km and temperatures of 810–750 °C). Two main episodes that correspond to the uplift of the Tangra Mountain and exhumation of the batholith are distinguished using apatite fission-track analysis. The models reveal initial very rapid cooling to ~ 80–90 °C between 40 and 33 Ma and a second episode of uplift and moderate cooling to surface temperatures between 22 and 15 Ma. The obtained positive age-altitude correlation suggests moderate exhumation rate of 340 m/Ma. The thermal modelling of the hypsometrically lowest sample reveals a later moderate cooling event to surface temperatures from 8 Ma to recent times, which corresponds to the Bransfield Rift initiation.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139194350","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
Planerite with aheylite and faustite from the Chala deposit, Spahievo Ore Field 斯帕希耶沃矿区查拉矿床出产的带有黑云母和辉石的榍石
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.43
Larisa Nesheva, Denka Yanakieva, P. Petrov, Stela Atanasova-Vladimirova, Nadia Petrova, R. Vassileva, Ivanina Sergeeva, Z. Cherkezova-Zheleva, Daniela Paneva
{"title":"Planerite with aheylite and faustite from the Chala deposit, Spahievo Ore Field","authors":"Larisa Nesheva, Denka Yanakieva, P. Petrov, Stela Atanasova-Vladimirova, Nadia Petrova, R. Vassileva, Ivanina Sergeeva, Z. Cherkezova-Zheleva, Daniela Paneva","doi":"10.52215/rev.bgs.2023.84.3.43","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.43","url":null,"abstract":"Planerite, aheylite and faustite are minerals of the turquoise group. They were found in samples from the Chala deposit, Spahievo Ore Field. The samples consist of a small crystalline mass of the investigated mineral phases among quartz. Single spherulites up to 2 mm in size and aggregates of spherulites with a yellowish-greenish color are observed in small cavities. Transparent, colorless wavellite crystals and aggregates are crystallized on spherulites. For the first time in Bulgaria, the presence of aheylite was established.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"19 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139194402","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
Different graphitization degrees of carbon matter in rocks of a same metamorphic evolution 变质演化相同的岩石中碳物质的石墨化程度不同
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.141
Alexander Vlahov, Rositsa Ivanova
{"title":"Different graphitization degrees of carbon matter in rocks of a same metamorphic evolution","authors":"Alexander Vlahov, Rositsa Ivanova","doi":"10.52215/rev.bgs.2023.84.3.141","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.141","url":null,"abstract":"Two X-ray diffraction methods were chosen to determine the degree of structural order (degree of graphitization) of natural carbonaceous matter. Factors influencing the graphitization processes during the progressive and regressive stages of metamorphism are examined. The correlation of the degrees of structural order of the carbonaceous material with the sequence of mineral growth allows the metamorphic history of the graphite-bearing rocks to be traced. The obtained data can be used for the evaluation of graphite as a raw material.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"305 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139195473","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
Anthropogenic impact on the groundwater regime: Case study of the Velika Morava alluvium 人类活动对地下水系统的影响：Velika Morava 冲积层案例研究
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.295
Jovana Mladenović, Vesna Ristić Vakanjac, M. Kresojević, B. Vakanjac, Jugoslav Nikolić, D. Polomcic, Dragoljub Bajić
{"title":"Anthropogenic impact on the groundwater regime: Case study of the Velika Morava alluvium","authors":"Jovana Mladenović, Vesna Ristić Vakanjac, M. Kresojević, B. Vakanjac, Jugoslav Nikolić, D. Polomcic, Dragoljub Bajić","doi":"10.52215/rev.bgs.2023.84.3.295","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.295","url":null,"abstract":"The Velika Morava River originates at the junction of the Južna Morava and Zapadna Morava at the town of Stalać in Serbia. It is 185 km long and empties into the Danube. The Velika Morava River Basin occupies a land area of 37 444 km2. The river flows through central Serbia, which features the most fertile land and the highest population density in the country. Public water supply in this region of Serbia relies on groundwater formed in alluvial sediments of the Velika Morava. Both industry and agriculture are well developed. There is intensive sand and gravel mining along the riverbanks, which has deepened the river channel by as much as 4 m and lowered water surface elevations at Ljubičevski Most. Given that, there is a hydraulic connection between groundwater and the Velika Morava, water levels in wells have also declined. The paper analyzes the elevations of the Velika Morava’s water surface and the water table.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"56 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139195941","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
Incorporation of As, Sb and Tl in pyrite from the epithermal Kandilka prospect, Eastern Rhodopes, south Bulgaria 保加利亚南部东罗多佩山脉 Kandilka 矿区表生黄铁矿中 As、Sb 和 Tl 的掺入情况
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.39
Yana Georgieva, R. Vassileva, Sylvina Georgieva
{"title":"Incorporation of As, Sb and Tl in pyrite from the epithermal Kandilka prospect, Eastern Rhodopes, south Bulgaria","authors":"Yana Georgieva, R. Vassileva, Sylvina Georgieva","doi":"10.52215/rev.bgs.2023.84.3.39","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.39","url":null,"abstract":"The major and trace-element chemistry of two pyrite generations (Py1 and Py2) from the Kandilka epithermal prospect was studied by EDS-scanning electron microscopy and laser ablation ICP-MS techniques. Both generations of pyrite are distinguished by occurrence and chemical properties. Pyrite from the first generation (Py1) is established as trace-element poor, sub- to euhedral (mainly single) crystals up to 200 µm. The later As-bearing pyrite (Py2) forms fine-grained semi-massive aggregates with increased contents of trace-elements. Except for arsenic, Py2 is enriched in gold and antimony. The As content of Py2 increases in an oscillatory manner from core to rim, reflecting changes in As activity and the chemical evolution of ore-bearing fluids. The oscillatory-zoned pyrite is composed of complex rhythmic overgrowths of alternating As-rich and As-poor bands. Positive correlation between As- and Au-content in Py2 is characteristic. According to the current results, the Kandilka prospect could be concerned as a low-sulphidation deposit.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"108 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139196011","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
Millerite from the Madan ore field 来自马丹矿区的米勒铁矿
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.67
P. Petrov
{"title":"Millerite from the Madan ore field","authors":"P. Petrov","doi":"10.52215/rev.bgs.2023.84.3.67","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.67","url":null,"abstract":"Millerite is discovered in samples from Krushev Dol and Mogilata deposits in the Madan ore field. It was found in two associations different in appearance and mineral composition. One of them is with light green ferro­dolomite, and the other with bright green mariposite (chromium-bearing phengite). Only cobalt and iron are detected as impurity elements in some analyses. They are in small concentrations (below 0.01 apfu). The Ni/S ratio is 0.95. The nickel source is associated with bodies of serpentinized ultramafics cut by ore-bearing veins.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"42 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191351","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
Pegmatites from western Rhodope Mts.: zircon data 罗多彼山脉西部的伟晶岩：锆石数据
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.101
V. Grozdev, R. Vassileva, Sylvina Georgieva
{"title":"Pegmatites from western Rhodope Mts.: zircon data","authors":"V. Grozdev, R. Vassileva, Sylvina Georgieva","doi":"10.52215/rev.bgs.2023.84.3.101","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.101","url":null,"abstract":"Ages of pegmatites from two localities (Rakitovo, Lepenitsa) from the western Rhodope Mts. were acquired by U-Pb geochronology on zircon with LA-ICP-MS. The pegmatites are hosted by the metamorphic rocks of the Chepino lithotectonic unit. The large pegmatite/s accumulation from the “Suhata Reka” quarry (Rakitovo locality) is formed at 68.7±1.3 Ma, while small deformed body southwards of Velingrad town (Lepenitsa locality) yielded age of 63.4±1.2 Ma. Crosscutting altered andesite dyke is presumed to intrude the metamorphic rocks and pegmatite at 59 Ma in the Lepenitsa locality. The data suggests connection with the initial stage of the magmatic activity of the Rila-West-Rhodope Batholith (RWRB).","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"64 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139192571","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
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