Bulletin of the Geological Society of Greece最新文献_第5页

The geology of Mount Orliakas and the Pindos Ophiolite, Greece. 奥利阿卡斯山和希腊品多斯蛇绿岩的地质。

Bulletin of the Geological Society of Greece Pub Date : 2019-12-27 DOI: 10.12681/bgsg.19376

Kevin Wong, K. Draper, Linshu Feng, Philip Hawkins, S. Oakley, Xiaowei Zheng

引用次数: 2

Mineralogical, Petrological and Geochemical Study of the Agios Ioannis Volcanic Rocks, Kamena Vourla Area, Greece 希腊Kamena Vourla地区Agios Ioannis火山岩的矿物学、岩石学和地球化学研究

Bulletin of the Geological Society of Greece Pub Date : 2019-12-19 DOI: 10.12681/bgsg.21128

C. Kanellopoulos, G. Vougioukalakis, C. Mavrogonatos, I. Megremi, I. Iliopoulos

{"title":"Mineralogical, Petrological and Geochemical Study of the Agios Ioannis Volcanic Rocks, Kamena Vourla Area, Greece","authors":"C. Kanellopoulos, G. Vougioukalakis, C. Mavrogonatos, I. Megremi, I. Iliopoulos","doi":"10.12681/bgsg.21128","DOIUrl":"https://doi.org/10.12681/bgsg.21128","url":null,"abstract":"The Plio-Pleistocene volcanic center of Lichades is located in the Northern Euboean Gulf, at the western extremity of the North Anatolian Fault and it is one of the most neo-tectonically active areas in Greece. Volcanic rocks are exposed in the form of lava flows and/or domes mostly in the small islands (Lichades) offshore Kamena Vourla, as well as in a small outcrop in mainland, namely the Agios Ioannis area. Based on the results of the present study, the Agios Ioannis volcanic rocks are characterized as trachyandesites with high-K calc-alkaline affinities, similar to several volcanic rocks from the South Aegean Volcanic Arc. The petrological and mineral-chemical study reveal that the studied volcanic rocks are characterized by vitrophyric texture and a matrix dominated by glass, numerous randomly-oriented microlites of plagioclase and minor sanidine, clinopyroxene and amphibole. Phenocrysts comprise of plagioclase, olivine, quartz, clinopyroxene and amphibole. Plagioclase composition ranges from andesine to bytownite (An 30 -An 73 ). Olivine cores are typically Mg-rich, and the rims display elevated FeO content. Clinopyroxenes display a narrow compositional range between augite and diopside, with the latter being more common. Amphiboles, are calcic and their composition ranges from tschermakite to tschermakitic hornblende. Mineralogical and geochemical similarities with other volcanic rocks in Greece such as Lesvos lamproites, may be helpful in understanding the genesis of the studied Agios Ioannis volcanics.","PeriodicalId":9519,"journal":{"name":"Bulletin of the Geological Society of Greece","volume":"27 1","pages":"274-289"},"PeriodicalIF":0.0,"publicationDate":"2019-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75354101","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: 4

Climate change in the recent geological past and the near future. Predicting its impacts: a Review 气候变化在最近的地质过去和不久的将来。预测其影响:综述

Bulletin of the Geological Society of Greece Pub Date : 2019-12-18 DOI: 10.12681/bgsg.20684

Constantinos Perisoratis

引用次数: 0

Re-assessment of depositional conditions of Cretaceous deposits around the Amfilochia and Arta areas Amfilochia和Arta地区白垩系沉积条件的再评价

Bulletin of the Geological Society of Greece Pub Date : 2019-12-11 DOI: 10.12681/bgsg.20769

N. Dimopoulos, E. Georgoulas, Savvas Peridis, G. Iliopoulos, Nikolina Bourli, P. Antoniou, A. Zelilidis

{"title":"Re-assessment of depositional conditions of Cretaceous deposits around the Amfilochia and Arta areas","authors":"N. Dimopoulos, E. Georgoulas, Savvas Peridis, G. Iliopoulos, Nikolina Bourli, P. Antoniou, A. Zelilidis","doi":"10.12681/bgsg.20769","DOIUrl":"https://doi.org/10.12681/bgsg.20769","url":null,"abstract":"Sedimentological studies of the Cretaceous limestones in the central Ionian basin (Amfilochia, Arta as well as Kerasonas areas) indicate that these deposits are composed of calciturbidites interbedded with breccia-microbreccia deposits. In the Amfilochia new cross-section, with a NNW-SSE direction, the lower Cretaceous Vigla limestones and Vigla shales were outcropped for the first time. This section is directed parallel to the paleo Ionian basin axis and the fact of the lateral discontinuity of Vigla limestones and Vigla shales indicate that during the sedimentation of these two Formations there was a restriction along the paleo basin axis, probably due to synsedimentary transfer fault activity. Forty-two (42) samples from Vigla shales were analyzed for their content in CaCO 3 and TOC, showed that these sediments present poor to fair hydrocarbon potential. In the Arta new cross-section, with a NE-SW direction, the Upper Cretaceous Senonian deposits showed strong deformation that took place during the compressional regime that affected the Ionian basin after sedimentation. This deformation appears stronger in the western part being close to a major thrust, and thus it is possible that this deformation could be responsible for the high secondary porosity of Upper Cretaceous deposits. Microfacies analysis of these deposits showed in general that deep-sea depositional environments prevailed, nevertheless in a few cases indications for the presence of environments with a shallow character imply the existence of isolated carbonate platforms close to the studied sections. In the studied sections with an E-W direction, no lateral changes were observed in the depositional conditions within the same Formation introducing standard depositional conditions across the paleo basin.","PeriodicalId":9519,"journal":{"name":"Bulletin of the Geological Society of Greece","volume":"24 1","pages":"241-259"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87901629","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

The use of geochemical ratios in groundwater quality assessment: the case of the Thriassion Plain, Attica, Greece 地球化学比值在地下水质量评价中的应用:以希腊阿提卡特里亚松平原为例

Bulletin of the Geological Society of Greece Pub Date : 2019-12-06 DOI: 10.12681/bgsg.20938

P. Makri, D. Hermides, M. Psychogiou, A. Ermidou

{"title":"The use of geochemical ratios in groundwater quality assessment: the case of the Thriassion Plain, Attica, Greece","authors":"P. Makri, D. Hermides, M. Psychogiou, A. Ermidou","doi":"10.12681/bgsg.20938","DOIUrl":"https://doi.org/10.12681/bgsg.20938","url":null,"abstract":"This paper is an effort to assess the groundwater quality and the geochemical processes mainly using the Chadha’s diagram which classifies natural waters and documents the Piper and extended Durov diagrams. Chadha’s diagram is a useful tool to interpret groundwater geochemical processes because it is produced by simple spreadsheets excel files. The example of hydrochemical analyses were given from groundwater samples of the Thriassion Plain. To attend our objective, 38 groundwater samples were collected. Hydrochemical sections, XY diagrams, distribution maps of ionic ratios as well as the Gibbs diagrams were used to identify origin of salinity and the hydrogeochemical processes that have taken place. The Gibbs diagrams have shown that evapotranspiration (ET) and rock-water interaction play an important role to the increase of groundwater salinity. The interpretation of Chadha diagram highlights that the stratigraphic factors and especially the clay strata occurrence have isolated fresh groundwater from seawater. The abundant occurrence of clay deposits to the depth of the plain work as barriers to direct seawater intrusion. Good quality groundwater identified confirms the important role of clay strata. Reverse cation exchange, is the predominant geochemical process in the Thriassion Plain aquifers, whereas evapotranspiration (ET) and rock-water interaction play an important role to the increase of groundwater salinity.","PeriodicalId":9519,"journal":{"name":"Bulletin of the Geological Society of Greece","volume":"37 1","pages":"223-240"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76450339","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

Mineralogical and Fluid Inclusions Study of Epithermal Type Veins Intruding the Volcanic Rocks of the Kornofolia Area, Evros, NE Greece. 侵入希腊东北部埃夫罗斯Kornofolia地区火山岩的浅成热液型脉体矿物学及流体包裹体研究

Bulletin of the Geological Society of Greece Pub Date : 2019-12-02 DOI: 10.12681/bgsg.20755

Foteini Aravani, L. Papadopoulou, V. Melfos, T. Soldatos, T. Zorba, P. Voudouris

引用次数: 0

Geology of the Northwestern Krania Basin 克拉尼亚盆地西北部地质

Bulletin of the Geological Society of Greece Pub Date : 2019-11-19 DOI: 10.12681/bgsg.19375

C. Caplan, Helen C. Gildersleeves, A. G. Harding, Benedict J. R. Harris, Benedict W. W. Johnson, James A. Kershaw, M. Maltby

{"title":"Geology of the Northwestern Krania Basin","authors":"C. Caplan, Helen C. Gildersleeves, A. G. Harding, Benedict J. R. Harris, Benedict W. W. Johnson, James A. Kershaw, M. Maltby","doi":"10.12681/bgsg.19375","DOIUrl":"https://doi.org/10.12681/bgsg.19375","url":null,"abstract":"We present a new map of 30 km2 of the northwestern Krania Basin at 1:10,000 scale, including rocks of the Pindos Ophiolite Group and associated units, and the sedimentary fill of the Krania Basin. The Krania Basin is a flexural basin developed in the Middle – Late Eocene and filled first with alluvial fan conglomerates and later with turbidite sandstones and siltstones, following a deepening of the basin. Analysis of the clasts within the sediment, combined with paleoflow analyses, suggest sediment input from the eroding Pindos Ophiolite to the west. The Pindos Ophiolite Group is represented in the area by pillow lavas, sheeted dykes and serpentinized harzburgites of the Aspropotamos Complex. The ophiolite forms imbricated, thrust bounded blocks which show two phases of thrusting, corresponding to Late Jurassic and Eocene stages of ophiolite emplacement. We identify five stages of deformation within the basin itself, starting with Early - Middle Eocene syndepositional extensional faulting associated with the formation of the basin. This was followed by four stages of post-depositional deformation, starting with Late Eocene compression associated with basin closure, which caused thrust faulting and folding of the sediments. Oligocene dextral faulting with a thrust component affected the basin margins. Finally, two normal faulting events with different orientations have affected the basin since the Miocene.","PeriodicalId":9519,"journal":{"name":"Bulletin of the Geological Society of Greece","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73611075","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

Study of the chromite mineralization associated to ophiolites from Tinos Island, Attico-Cycladic Massif 阿提科-基克拉迪地块蒂诺斯岛蛇绿岩铬铁矿成矿研究

Bulletin of the Geological Society of Greece Pub Date : 2019-11-14 DOI: 10.12681/bgsg.20777

M. Kokkaliari, K. S. Seymour, S. Tombros, E. Koutsopoulou

{"title":"Study of the chromite mineralization associated to ophiolites from Tinos Island, Attico-Cycladic Massif","authors":"M. Kokkaliari, K. S. Seymour, S. Tombros, E. Koutsopoulou","doi":"10.12681/bgsg.20777","DOIUrl":"https://doi.org/10.12681/bgsg.20777","url":null,"abstract":"This paper aims to study the chromitites, as well as their host rocks (meta-peridotites, meta-dunites and serpentinites) of the ophiolite complex of Mount Tsiknias, in Tinos Island. Recognition of their mineralogy and their textural features was carried out through detailed petrographic study. The mineral chemistry analysis contributed to the evaluation of the analyzed chromites, the chemical composition of which provides important information about the petrogenetic evolution of the chromitite ores. The chromites were in equilibrium with boninite melts derived from Supra-Subduction Zone, e.g., a depleted mantle wedge. In the binary classification diagram for spinels, the Tinos samples extend in the fields of Mg-chromite and chromite sensu strictu. In the TiO2 vs Al2O3 diagram, the chromites plot in the field of Supra-Subduction Zone (SSZ) peridotites and partly overlap the field of chromites in Back-Arc Basalts (BABB), however the same samples plot in the field of chromite of boninites. In the Al2O3 vs Cr2O3 diagram both groups of Tinos chromites plot in the field/extremity of “mantle chromites”.","PeriodicalId":9519,"journal":{"name":"Bulletin of the Geological Society of Greece","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79545184","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

Petrological and Geochemical Comparison of Rodingites from Kimi -Evia island with outcrops from adjacent regions 基米-埃维亚岛罗丁岩与邻近地区露头岩的岩石学地球化学比较

Bulletin of the Geological Society of Greece Pub Date : 2019-11-08 DOI: 10.12681/bgsg.19603

C. Karkalis, A. Magganas, P. Koutsovitis

{"title":"Petrological and Geochemical Comparison of Rodingites from Kimi -Evia island with outcrops from adjacent regions","authors":"C. Karkalis, A. Magganas, P. Koutsovitis","doi":"10.12681/bgsg.19603","DOIUrl":"https://doi.org/10.12681/bgsg.19603","url":null,"abstract":"The present study is focused on the geochemical and petrological comparison between rodingites from the Kimi region in Central Evia (Greece) with those from East and West Othris, as well as with rodingites from Skyros island. Based upon their whole rock geochemical and petrographical data it is suggested that rocks from Skyros island and Kimi-Evia display similar features. Kimi-Evia and Skyros rodingites are characterized by their highly comparable REE patterns with significant LREE enrichments. This is most likely attributed to the effects of carbonic rich fluids, enhancing the transfer of REE via CO3-2 ligands. The West Othris rodingites display similar MREE and HREE patterns with the least fractionated rodingites from Kimi-Evia and Skyros, whereas the LREE are significantly depleted. The East Othris rodingites differ from all other rodingite occurrences, since they exhibit much lower ΣREE contents. Rodingitization in all studied areas was associated with serpentinization processes and was evolved in several metasomatic stages, in which vesuvianite was formed during the last episodes at relatively low temperatures.","PeriodicalId":9519,"journal":{"name":"Bulletin of the Geological Society of Greece","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88174507","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

Textural, Mineralogical and Geochemical Assessment of the Pikrolimni Lake Sediments (Kilkis District, Northern Greece) and Suitability for use in Pelotherapy Pikrolimni湖沉积物(希腊北部Kilkis地区)的结构、矿物学和地球化学评估及其在Pelotherapy中的适用性

Bulletin of the Geological Society of Greece Pub Date : 2019-11-04 DOI: 10.12681/bgsg.21080

E. Sofianska, C. Athanassoulis, D. Tarenidis, N. Xirokostas, Maria Gkagka

{"title":"Textural, Mineralogical and Geochemical Assessment of the Pikrolimni Lake Sediments (Kilkis District, Northern Greece) and Suitability for use in Pelotherapy","authors":"E. Sofianska, C. Athanassoulis, D. Tarenidis, N. Xirokostas, Maria Gkagka","doi":"10.12681/bgsg.21080","DOIUrl":"https://doi.org/10.12681/bgsg.21080","url":null,"abstract":"Pelotherapy is the application of thermal muds (peloids) for recovering muscle, bone and skin pathologies. Specific criteria were established for the evaluation of the therapeutic suitability of peloids. Critical factors ruling the quality of the solid phase of peloids include granulometry, mineralogy, and physical-chemical properties. The aim of the present study was to investigate the textural, mineralogical and geochemical characteristics of the Pikrolimni Lake sediments (PLS), Kilkis district (N. Greece) in order to assess their suitability for application as raw material into mud therapy technologies. Representative PLS samples were collected and analyzed by means of different techniques at the analytical laboratories of the Hellenic Survey of Geology and Mineral Exploration (HSGME). Results showed that, texturally, the PLS were classified as sandy loam sediments. X-ray diffraction (XRD) study revealed that the PLS consist mainly of quartz, clay minerals (kaolinite, montmorillonite, illite), and muscovite, with minor feldspar and calcite. X-ray fluorescence (XFR) analysis showed that PLS samples have higher SiO2 and lower Al2O3 contents compared to the average shale composition. Among the analyzed, by means of inductively coupled plasma mass spectrometry (ICP-MS) technique, potentially toxic elements only As and Pb contents were found significantly higher than those of the average shale. Based on the calculated mean values of enrichment factor (EF) and geo-accumulation index (Igeo) PLS displayed minor enrichment and moderate contamination by Pb and As, respectively. In conclusion, an improvement of the grain size composition of PLS by means of a sieving process is needed. Besides, the study of the concentration and behavior of toxic elements in peloids formed by the mixing of the processed PLS with salty thermo-mineral water is proposed.","PeriodicalId":9519,"journal":{"name":"Bulletin of the Geological Society of Greece","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83555635","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