Geology, Geophysics and Environment最新文献_第4页

Sulfur and lead isotope geochemical characteristics of Pb-Zn deposits in the Khau Loc zone, northeastern Vietnam, and their significance 越南东北部Khau Loc地区铅锌矿床硫、铅同位素地球化学特征及其意义

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Geology, Geophysics and Environment Pub Date : 2021-12-01 DOI: 10.7494/geol.2021.47.3.143

Hung The Khuong, Ta Dinh Tung, Do Quoc Binh, Pham Nhu Sang, N. Cuc, Nguyen Thi Hoang Linh, Q. Tin

{"title":"Sulfur and lead isotope geochemical characteristics of Pb-Zn deposits in the Khau Loc zone, northeastern Vietnam, and their significance","authors":"Hung The Khuong, Ta Dinh Tung, Do Quoc Binh, Pham Nhu Sang, N. Cuc, Nguyen Thi Hoang Linh, Q. Tin","doi":"10.7494/geol.2021.47.3.143","DOIUrl":"https://doi.org/10.7494/geol.2021.47.3.143","url":null,"abstract":"In northeastern Vietnam, the Khau Loc zone is considered to have high potential for lead-zinc mineralization. The lead isotope data for 18 galena samples and 18 ones of δ34S isotope data (including galena and pyrite samples) were collected from lead-zinc ore deposits in some areas in the Khau Loc zone, including Phia Dam, Khuoi Man, Ban Lin, Lung Dam, and Ta Pan. These were employed to investigate the sulfur and lead isotope geochemical characteristics of Pb-Zn deposits and their significance in this study. The samples were analyzed using the LA-ICP-MS to show that the Pb isotopic ratios of 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb in the galena samples range from 17.8908 to 18.6012, 15.5794 to 16.1025, 38.4420 to 39.2118, with the average values of 18.296, 15.749, and 38.812, respectively. The pyrite and galena samples had the δ34S isotope, ranging from 9.0 to 15.106. The sulfur isotope systematics implies that most of the lead-zinc ore formations originated from marine sedimentary evaporation deposits and magmatic intrusion-volcanic eruption sources rich in silica. The distribution of lead isotopic ratios had a well-defined cluster for each deposit, indicating the formation of lead-zinc deposits and lower crust and orogen trends. In addition, these findings of lead isotopic ratios and δ 34S isotopes proved that the Khau Loc zone is an activated structure with continuous growth in continental crust thickness during the early Proterozoic and Cenozoic periods. Furthermore, the study results also presented the evolution of material sources involved in the formation of lead-zinc ores in the Khau Loc zone.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"46 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82183183","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

Assessment of the health risk associated with exposure to heavy metals present in particulate matter deposition in the Małopolska Province 评估与接触Małopolska省颗粒物沉积中存在的重金属有关的健康风险

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Geology, Geophysics and Environment Pub Date : 2021-07-05 DOI: 10.7494/GEOL.2021.47.2.95

J. Wieczorek, A. Baran, Ewa Pawlik, Izabela Mądro, Anna Gąsienica, Iwona Wojtaszek, J. Antonkiewicz

{"title":"Assessment of the health risk associated with exposure to heavy metals present in particulate matter deposition in the Małopolska Province","authors":"J. Wieczorek, A. Baran, Ewa Pawlik, Izabela Mądro, Anna Gąsienica, Iwona Wojtaszek, J. Antonkiewicz","doi":"10.7494/GEOL.2021.47.2.95","DOIUrl":"https://doi.org/10.7494/GEOL.2021.47.2.95","url":null,"abstract":"The aim of the study was to investigate the content of trace elements in deposited particulate matter and to estimate the health risk to Kraków inhabitants, caused by the exposure to heavy metals in particulate matter deposition. The qualitative and quantitative assessments of selected heavy metals in deposited particulate matter have been carried out in the city of Kraków (Małopolska, southern Poland, 5 measuring points) for seven months, between February and September 2017. A comparative study was conducted at the same time in Małopolska (5 measuring points). The deposited particulate matter was collected gravitationally, using measurement plates covered with aluminum foil and paraffin jelly. The largest deposition of particulate matter was found in May and June. The highest amount of deposited particulate matter and metals present in it was determined in Kraków. The Hazard Quotient (HQ) evaluation for non-carcinogenic effect showed low risk for each metal. In the case of lead in particulate matter, the carcinogenic risk value did not reach 10−6 hence this risk is acceptable. The total carcinogenic risk for all routes of exposure to cadmium was higher, indicating the risk of cancer in children and adults, with children more exposed. However, the carcinogenic risk for cadmium was also acceptable. The study showed that the problem of poor air quality concerns not only the city of Kraków, but also the entire Małopolska region. Elevated metal concentrations in particulate matter indicate the need for monitoring it in the air.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"68 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76295243","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

Selected aspects of modern seismic imaging and near-surface velocity model building in the area of Carpathian fold and thrust belt 喀尔巴阡褶皱冲断带地区现代地震成像选择及近地表速度模型建立

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Geology, Geophysics and Environment Pub Date : 2021-05-03 DOI: 10.7494/GEOL.2021.47.2.71

A. Dalętka

{"title":"Selected aspects of modern seismic imaging and near-surface velocity model building in the area of Carpathian fold and thrust belt","authors":"A. Dalętka","doi":"10.7494/GEOL.2021.47.2.71","DOIUrl":"https://doi.org/10.7494/GEOL.2021.47.2.71","url":null,"abstract":"Despite the increasing technological level of the reflection seismic method, the imaging of fold and thrust belts remains a demanding task, and usually leaves some questions regarding the dips, the shape of the subthrust structures or the most correct approach to velocity model building. There is no straightforward method that can provide structural representation of the near-surface geological boundaries and their velocities. The in-terpretation of refracted waves frequently remains the only available technique that may be used for this purpose, although one must be aware of its limitations which appear in the complex geological settings.\u0000In the presented study, the analysis of velocity values obtained in the shallow part of Carpathian orogenic wedge by means of various geophysical methods was carried out. It revealed the lack of consistency between the results of 3D refraction tomography and both the sonic log and uphole velocities. For that reason, instead of the indus-try-standard utilization of tomography, a novel, geologically-consistent method of velocity model building is pro-posed. In the near-surface part, the uphole velocities are assigned to the formations, documented by the surface geologic map. Interpreted time-domain horizons, supplemented by main thrusts, are used to make the velocity field fully-compatible with the litho-stratigraphic units of the Carpathians. \u0000The author demonstrates a retrospective overview of seismic data imaging in the area of the Polish Carpathian orogenic wedge and discusses the most recent global innovations in seismic methodology which are the key to successful hydrocarbon exploration in fold and thrust regions.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"58 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80840099","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

A regurgitalite of the Middle Triassic (Muschelkalk) from Upper Silesia (Poland) 来自上西里西亚(波兰)的中三叠世(Muschelkalk)反流石

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Geology, Geophysics and Environment Pub Date : 2021-04-28 DOI: 10.7494/GEOL.2021.47.1.33

R. Niedźwiedzki, Dawid Surmik, Agnieszka Chećko, M. Salamon

引用次数: 2

Detrital zircon U-Pb geochronology of a metasomatic calc-silicate in the Tsäkkok Lens, Scandinavian Caledonides 斯堪的纳维亚喀里多尼系Tsäkkok Lens中交代钙硅酸盐碎屑锆石U-Pb年代学研究

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Geology, Geophysics and Environment Pub Date : 2021-04-23 DOI: 10.7494/GEOL.2021.47.1.21

Chris Barnes, J. Majka, M. Bukała, E. Nääs, S. Rousku

{"title":"Detrital zircon U-Pb geochronology of a metasomatic calc-silicate in the Tsäkkok Lens, Scandinavian Caledonides","authors":"Chris Barnes, J. Majka, M. Bukała, E. Nääs, S. Rousku","doi":"10.7494/GEOL.2021.47.1.21","DOIUrl":"https://doi.org/10.7494/GEOL.2021.47.1.21","url":null,"abstract":"The Tsäkkok Lens of the Seve Nappe Complex in the Scandinavian Caledonides comprises eclogite bodies hosted within metasedimentary rocks. These rocks are thought to be derived from the outermost margin of Baltica along the periphery of the Iapetus Ocean, but detrital records from the sedimentary rocks are lacking.Many metasedimentary outcrops within the lens expose both well-foliated metapelitic rocks and massive calc-silicates. The contacts between these two lithologies are irregular and are observed to trend at all angles to the high-pressure foliation in the metapelites. Where folding is present in the metapelites, the calc-silicate rocks are also locally folded. These relationships suggest metasomatism of the metapelites during the Caledonian orogenesis. Zircon U-Pb geochronology was conducted on sixty-one zircon grains from a calc-silicate sample to investigate if they recorded the metasomatic event and to assess the detrital zircon populations. Zircon grains predominantly show oscillatory zoning, sometimes with thin, homogeneous rims that have embayed contacts with the oscillatory-zoned cores. The zircon cores yielded prominent early Stenian, Calymmian, and Statherian populations with a subordinate number of Tonian grains. The zircon rims exhibit dissolution-reprecipitation of the cores or new growth and provide ages that span similar time frames, indicating overprinting of successive tectonic events. Altogether, the zircon record of the calc-silicate suggests that the Tsäkkok Lens may be correlated to Neoproterozoic basins that are preserved in allochthonous positions within the northern extents of the Caledonian Orogen.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"177 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79884472","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 application of volume texture extraction to three-dimensional seismic data – lithofacies structures exploration within the Miocene deposits of the Carpathian Foredeep 体积纹理提取在三维地震资料中的应用——喀尔巴阡前深中新世沉积岩相构造勘探

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Geology, Geophysics and Environment Pub Date : 2021-01-26 DOI: 10.7494/GEOL.2020.46.4.301

M. Łukaszewski

{"title":"The application of volume texture extraction to three-dimensional seismic data – lithofacies structures exploration within the Miocene deposits of the Carpathian Foredeep","authors":"M. Łukaszewski","doi":"10.7494/GEOL.2020.46.4.301","DOIUrl":"https://doi.org/10.7494/GEOL.2020.46.4.301","url":null,"abstract":"There are numerous conventional fields of natural gas in the Carpathian Foredeep, and there is also evidence to suggest that unconventional gas accumulations may occur in this region. The different seismic signatures of these geological forms, the small scale of amplitude variation, and the large amount of data make the process of geological interpretation extremely time consuming. Moreover, the dispersed nature of information in a large block of seismic data increasingly requires automatic, self-learning cognitive processes. Recent developments with Machine Learning have added new capabilities to seismic interpretation, especially to multi-attribute seismic analysis. Each case requires a proper selection of attributes. In this paper, the Grey Level Co-occurrence Matrix method is presented and its two texture attributes: Energy and Entropy. Haralick’s two texture parameters were applied to an advanced interpretation of the interval of Miocene deposits in order to discover the subtle geological features hidden between the seismic traces. As a result, a submarine-slope channel system was delineated leading to the discovery of unknown earlier relationships between gas boreholes and the geological environment. The Miocene deposits filling the Carpathian Foredeep, due to their lithological and facies diversity, provide excellent conditions for testing and implementing Machine Learning techniques. The presented texture attributes are the desired input components for self-learning systems for seismic facies classification.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"28 1","pages":"301-313"},"PeriodicalIF":0.8,"publicationDate":"2021-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89678369","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

Change-point detection and trend analysis in monthly, seasonal and annual air temperature and precipitation series in Bartın province in the western Black Sea region of Turkey 土耳其黑海西部Bartın省气温和降水序列月、季、年变化点探测及趋势分析

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Geology, Geophysics and Environment Pub Date : 2021-01-19 DOI: 10.7494/GEOL.2020.46.3.223

B. Yaman, M. Ertuğrul

{"title":"Change-point detection and trend analysis in monthly, seasonal and annual air temperature and precipitation series in Bartın province in the western Black Sea region of Turkey","authors":"B. Yaman, M. Ertuğrul","doi":"10.7494/GEOL.2020.46.3.223","DOIUrl":"https://doi.org/10.7494/GEOL.2020.46.3.223","url":null,"abstract":"Studies associated with climate change and variability are of great importance at both the global and local scale in the global climate crisis. In this study, change-point detection and trend analysis were carried out on mean, maximum, minimum air temperatures and total precipitation based on monthly, seasonal and annual scale in Bartin province located in the western Black Sea Region of Turkey. For this aim, 4-different homogenei - ty tests (von Neumann test, Pettitt test, Buishand range test and standard normal homogeneity test) for change- point detection, Modified Mann–Kendall test and Şen’s innovative trend test for trend analysis, and Sen’s slope test for the magnitude estimation of trends were used. According to the test results, the summer temperatures in particular show increasing trends at the 0.001 significance level. Mean maximum temperature in August, mean minimum temperature in June and August, and mean temperature in July and August are in increasing trend at the 0.001 significance level. Over a 51 year period (1965–2015) in Bartin province, the highest rate of change per decade in air temperatures is in August (0.55°C for T max , 0.46°C for T min and 0.43°C for T mean ) based on Sen’s slope. However, the study showed that apart from October precipitation, there is no significant trend in monthly, seasonal and annual precipitation in Bartin. Increasing trends in mentioned climate variables are also visually very clear and strong in Şen’s innovative trend method, and they comply with the statistical results. As a result, the study revealed some evidence that temperatures will increase in the future in Bartin and its environs.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"5 1","pages":"223-223"},"PeriodicalIF":0.8,"publicationDate":"2021-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78312451","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

Progress in the development of the semi-empirical calibration of neutron probes based on Monte Carlo modeling 基于蒙特卡罗模型的中子探测器半经验定标研究进展

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Geology, Geophysics and Environment Pub Date : 2021-01-19 DOI: 10.7494/GEOL.2020.46.3.251

U. Woźnicka

引用次数: 0

Statistical evaluation of the geochemical data for prospecting polymetallic mineralization in the Suoi Thau – Sang Than region, Northeast Vietnam 越南东北索陶-桑丹地区多金属成矿地球化学资料的统计评价

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Geology, Geophysics and Environment Pub Date : 2020-12-30 DOI: 10.7494/GEOL.2020.46.4.285

Pham Nhu Sang, N. Phuong, Vu Thai Linh, B. V. Sang

{"title":"Statistical evaluation of the geochemical data for prospecting polymetallic mineralization in the Suoi Thau – Sang Than region, Northeast Vietnam","authors":"Pham Nhu Sang, N. Phuong, Vu Thai Linh, B. V. Sang","doi":"10.7494/GEOL.2020.46.4.285","DOIUrl":"https://doi.org/10.7494/GEOL.2020.46.4.285","url":null,"abstract":"In Northeast Vietnam, Suoi Thau-Sang Than is considered as a high potential area of polymetallic deposits. 1,720 geochemical samples were used to investigate polymetallic mineralization; thereby polymetallic ore occurrences in this study region were discovered and the statistical and multivariate analysis helps to define geochemical anomalies in some northeastern regions, namely Suoi Thau, Sang Than, and Ban Kep. The statistical method and cluster analysis of geochemical data indicate that the Cu, Pb, and Zn elements are good indicators, and most of them comply with the lognormal or gamma distribution. Based on the third-order threshold, the geochemical anomalies of the content of the Cu, Pb, and Zn elements reflect the concentration of copper forming ore bodies in the mineralized zone, and clearly show the concentration in three distinct zones. The trend surface analysis which was employed to determine spatial variations and relationships among these good indicator elements and anomalous areas revealed relative changes in the content of the indicator elements, and they can be considered as regular. Moreover, the goodness of fit obtained trend functions of Pb and Zn, and Cu elements is a third-degree trend surface model. These results indicate that the models can be useful in studying geochemical anomalies and analyzing the tendency of the concentration of indicator elements in the Suoi Thau-Sang Than region. Additionally, it is suggested that the statistical analysis shows a remarkable potential to use the bottom river sediments in the region to investigate polymetallic mineralization. Moreover, geochemical data can help to evaluate geochemical anomalies of the pathfinder elements and potential mineral mapping of the Suoi Thau-Sang Than region in Northeast Vietnam.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"32 1","pages":"285-299"},"PeriodicalIF":0.8,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85484152","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

Seismic stratigraphic analysis for hydrocarbon exploration in the Beta Field, Coastal Swamp Depobelt, Niger Delta 尼日尔三角洲滨海沼泽沉积带Beta油田油气勘探地震地层分析

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Geology, Geophysics and Environment Pub Date : 2020-12-22 DOI: 10.7494/GEOL.2020.46.4.259

M. A. Adeleye, Kazeem Oladayo Yekeen, Sikiru A. Amidu

{"title":"Seismic stratigraphic analysis for hydrocarbon exploration in the Beta Field, Coastal Swamp Depobelt, Niger Delta","authors":"M. A. Adeleye, Kazeem Oladayo Yekeen, Sikiru A. Amidu","doi":"10.7494/GEOL.2020.46.4.259","DOIUrl":"https://doi.org/10.7494/GEOL.2020.46.4.259","url":null,"abstract":"Hydrocarbon exploration analysis from a seismic stratigraphic approach was carried out within the Beta Field, Coastal Swamp Depobelt, Niger Delta, to identify system tracts and sequence boundaries that could be associated with potential hydrocarbon accumulation. 3D seismic volume and data from four wells were analyzed. Depositional sequences, system tracts, sequence boundaries, and candidate maximum flooding surfaces were picked from logs, while reflection patterns and terminations were interpreted from seismic sections. Log shapes from gamma rays in combination with seismic facies analysis were interpreted in order to delineate lithology, depositional environments and depositional sequences. Seismic attributes were extracted and were draped on gridded surfaces from the interpreted seismic horizons. These were integrated with structure maps to obtain structural and stratigraphic trends, and possible presence of reservoir sand. Five depositional sequences and nine seismic facies were identified within the field. The depositional sequences were designated Sequences S1 to S5 based on the depth of the occurrences and stacking patterns. This study reveals a progression from fluvial depositional settings to the shelf. The main reservoirs identified are the sand units of the highstand and lowstand within three depositional sequences (S1, S4 and S5) although interbedded sands within the TST of S4 and S5 are also suspected of being potential reservoirs. The channel sand deposits within the study area are suspected to be hydrocarbon bearing as they occurred within the complex fault trapping system popular in the Niger Delta. The application of seismic stratigraphy, as shown in this study, serves to encourage exploration in the Niger Delta where it could be effectively employed for reducing risk in hydrocarbon exploration.","PeriodicalId":12724,"journal":{"name":"Geology, Geophysics and Environment","volume":"283 1","pages":"259-271"},"PeriodicalIF":0.8,"publicationDate":"2020-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80191704","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