International Journal of Earth Sciences最新文献_第2页

Geochemical vectors to ore and environmental significance at the Chatree epithermal low-sulfidation deposit, Thailand 泰国Chatree浅成低温低硫化矿床矿石地球化学矢量及环境意义

IF 2.3 3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-29 DOI: 10.1007/s00531-023-02367-6

Sirawit Kaewpaluk, Thitiphan Assawincharoenkij, Christoph Hauzenberger, Abhisit Salam

{"title":"Geochemical vectors to ore and environmental significance at the Chatree epithermal low-sulfidation deposit, Thailand","authors":"Sirawit Kaewpaluk, Thitiphan Assawincharoenkij, Christoph Hauzenberger, Abhisit Salam","doi":"10.1007/s00531-023-02367-6","DOIUrl":"https://doi.org/10.1007/s00531-023-02367-6","url":null,"abstract":"<p>Understanding geochemical zoning, including major components, minor components, and trace elements, in ore deposits can significantly improve Au exploration. Therefore, in this study, we focus on the geochemical characteristics of ore and alteration zones in the largest low-sulfidation (LS) epithermal Au–Ag deposit in Thailand, namely Chatree deposit. The occurrence of metal and metalloids can be distinguished into three groups: (1) major components in ore minerals (e.g., As, Cu, Fe, Pb, Sb, and Zn), (2) trace elements in ore minerals (e.g., As, Cd, Hg, and Mn), and (3) trace elements in gangue minerals (e.g., Mn). This study suggests that the ore minerals of a shallow system of the epithermal LS deposit are enriched in As, Sb, and Hg compared to the deeper system. Hydrothermal alteration leads to enrichment of K<sub>2</sub>O and depletion of Na<sub>2</sub>O and CaO. Besides major oxides, some low-field strength elements (e.g., Rb, and Ba) show the same behavior as K<sub>2</sub>O, whereas Sr is similar to CaO. In addition, positive Eu anomalies are associated with hydrothermal alteration. For metals and metalloids, arsenic is an important pathfinder element because its content is associated with the electrum occurrence and significantly increases toward the ore zone. Mn, Pb, and Cd are prominent in the ore zone; whereas, Ti, Al, and Cr decrease toward the ore zone due to dilution from silicification. Furthermore, even though the concentrations of As, Cd, Cr, Pb, and Ni in the ore and alteration zones are lower than Thailand's Total Threshold Limit Concentration (TTLC) for waste, the mine should still implement critical monitoring of these elements.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":13845,"journal":{"name":"International Journal of Earth Sciences","volume":"201 S603","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138497046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Terpenoids in resinites from middle Cretaceous karst infillings in the Rhenish Massif (Rhineland, Germany): botanical source and preservation 修正:德国莱茵兰(Rhineland, Germany)中白垩世岩溶填充物中树脂中的萜类化合物:植物来源和保存

IF 2.3 3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-29 DOI: 10.1007/s00531-023-02358-7

Bernd R. T. Simoneit, Daniel R. Oros, Angelika Otto, Christoph Hartkopf-Fröder, Volker Wilde

引用次数: 0

Using two-pyroxene mafic granulites to reconstruct ultra-high temperatures and the retrograde P–T path of metamorphism in the Socorro-Guaxupé Nappe (Southern Brasília Orogen, SE Brazil) 利用双辉石基性麻粒岩重建巴西东南部socoro - guaxup<e:1>推覆体(南Brasília造山带)的超高温和变质作用的逆行P-T路径

IF 2.3 3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-24 DOI: 10.1007/s00531-023-02361-y

Otavio Sant’ Anna G. Silva, George L. Luvizotto, Regiane A. Fumes, Renato Moraes, George W. Clemence Junior, Marcos Aurelio F. de Oliveira

{"title":"Using two-pyroxene mafic granulites to reconstruct ultra-high temperatures and the retrograde P–T path of metamorphism in the Socorro-Guaxupé Nappe (Southern Brasília Orogen, SE Brazil)","authors":"Otavio Sant’ Anna G. Silva, George L. Luvizotto, Regiane A. Fumes, Renato Moraes, George W. Clemence Junior, Marcos Aurelio F. de Oliveira","doi":"10.1007/s00531-023-02361-y","DOIUrl":"https://doi.org/10.1007/s00531-023-02361-y","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the southernmost part of the Southern Brasília Orogen (SE Brazil), regional ultra-high temperature metamorphism has been reported mainly in garnet-bearing granulites and (garnet)-orthopyroxene-bearing leucosomes at the base of the Socorro-Guaxupé Nappe, but detailed petrological studies focusing on garnet-absent mafic granulites at the upper crustal levels of this terrain are still scarce and the tectonic setting in which these extreme thermal conditions were attained are still under debate. In this study, we focus on reconstructing the metamorphic <i>P–T</i> paths of (garnet-absent) mafic granulites at intermediate crustal levels of the Socorro-Guaxupé Nappe using petrography, compositional maps, phase diagram modelling and Ti-in-quartz geothermometry. Our results indicate that the mafic granulites record peak <i>P–T</i> conditions of ~ 970 °C and 9.0–9.5 kbar (thermobaric ratio of ~ 1078 °C GPa<sup>−1</sup>) and their retrograde paths are characterized by both decompression and cooling, down to ~ 840–850 °C and 5.5–6.0 kbar. Our peak temperature results are consistent with other estimates for granulites and orthopyroxene-bearing leucosomes throughout the nappe, but the (peak) pressure results indicate points to its decrease towards the structural top. The similarity of retrograde paths throughout the Guaxupé Nappe suggests similar exhumation dynamics at different crustal depths. Furthermore, a prominent decompression vector along with the thermal peak, indicated by intergrowth microtextures and chemical zoning, coupled with compositional isopleths, suggests regional metamorphism during the continental collision between the Paranapanema and the São Francisco paleoplates.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":13845,"journal":{"name":"International Journal of Earth Sciences","volume":"202 1‐6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138497043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FRS (Fault Rating System): a quantitative classification of active faults for hazard evaluations FRS(故障等级系统):用于危害评估的活动断层的定量分类

IF 2.3 3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-24 DOI: 10.1007/s00531-023-02360-z

Levent Selçuk, Azad Sağlam Selçuk

{"title":"FRS (Fault Rating System): a quantitative classification of active faults for hazard evaluations","authors":"Levent Selçuk, Azad Sağlam Selçuk","doi":"10.1007/s00531-023-02360-z","DOIUrl":"https://doi.org/10.1007/s00531-023-02360-z","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The correct estimation of seismic hazards is a touchstone of seismic risk assessments. However, there is no quantitative or standard methodology to include the impacts of geological (i.e., seismo-tectonic) features of active faults or fault zones, and current classification schemes are not useful in hazard evaluations. Therefore, an attempt has been made to develop a methodology that integrates seismo-tectonic parameters of active faults to better inform urban and regional planning decisions. Fault rating system (FRS) provides a comparative review of faults/fault zones using a rating-based approach. In this approach, seven seismo-tectonic parameters are used to classify the fault/fault zone. Each of the seven parameters is assigned a value corresponding to the seismo-tectonic characteristics. The sum of the seven seismo-tectonic parameters is the fault index (FI) value, which lies in the range 0–100. A total of 64 important faults/fault zones were statistically analyzed to determine the best correlations with FI and moment magnitude (Mw) and peak ground acceleration (PGA). It was found that the FI values provide strong correlations with maximum Mw and PGA. It is proposed urban and regional planners use FRS to ensure a consistent approach in characterizing key aspects of active faults in earthquake-prone regions and in estimating ground motion parameters.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":13845,"journal":{"name":"International Journal of Earth Sciences","volume":"202 S606","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138497042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Mw = 5.8 2019 Silivri earthquake, NW Türkiye: is it a warning beacon for a big one? 2019年西北<s:1>西里夫里地震(Mw = 5.8):这是大地震的预警信号吗?

IF 2.3 3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-16 DOI: 10.1007/s00531-023-02359-6

Murat Utkucu, Fatih Uzunca, Hatice Durmuş, Süleyman Sami Nalbant, Cengiz İpek, Şefik Ramazanoğlu

{"title":"The Mw = 5.8 2019 Silivri earthquake, NW Türkiye: is it a warning beacon for a big one?","authors":"Murat Utkucu, Fatih Uzunca, Hatice Durmuş, Süleyman Sami Nalbant, Cengiz İpek, Şefik Ramazanoğlu","doi":"10.1007/s00531-023-02359-6","DOIUrl":"https://doi.org/10.1007/s00531-023-02359-6","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The September 26, 2019 Silivri earthquake (<i>M</i><sub>W</sub> = 5.8) occurred along the North Anatolian Fault beneath the Marmara Sea and its epicenter was in an identified seismic gap. Coseismic stress calculations demonstrate that the 1999 İzmit earthquake (<i>M</i><sub>W</sub> = 7.4) caused stress increase from 0.057 to 0.114 bars at its hypocenter, depending on the various reported rupture parameters. In addition, over 20 years following the 1999 earthquake, and constituting the main difference from previous studies, viscoelastic postseismic stress computations indicate stress increase from 0.081 to 0.135 bars at the hypocenter. In spite of the positive stress transfer, the 2019 earthquake occurred long after the end of the computed aftershock time span (~ 16 years) of the 1999 earthquake. Plots of the seismicity around selected points within the gap also show that the background seismicity level following the 1999 earthquake was reached in 2003. Therefore, it is suggested that the 2019 earthquake was not an aftershock but rather an independent event, and its occurrence was hastened about 4 years due to stress loading. Further analysis of the seismicity between 1978 and 2020 indicates that the <i>b</i> value increased from a range of 1.0–1.1 to 1.6–1.8 till 2002, then progressively decreased to 0.9–1.0, which is consistent with positive stress transfer. The stress increase ranging from 0.19 to 2.52 bars on the segments within the gap brought forward their seismic cycles about 33 and 2 years from east to west, respectively. These additional clock advances in the seismic cycles due to stress load urgently require risk mitigating actions.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":13845,"journal":{"name":"International Journal of Earth Sciences","volume":"202 S607","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138497041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Episodic magmatism at the Permian/Triassic crisis boundary and its linkage to underlying source rocks: constraints from conodont-based high-resolution geochemical proxies in marine carbonate successions, South China 二叠纪/三叠纪危界幕式岩浆活动及其与下伏烃源岩的联系:华南海相碳酸盐岩层序牙形刺高分辨率地球化学指标的约束

IF 2.3 3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-15 DOI: 10.1007/s00531-023-02357-8

Chao Liu, Jing Ding, Wenzhao Sun, Xueying Luan, Shasha Sun, Yong Yang, Mengsen Feng, Tanen Jiang, Jiayu Li

{"title":"Episodic magmatism at the Permian/Triassic crisis boundary and its linkage to underlying source rocks: constraints from conodont-based high-resolution geochemical proxies in marine carbonate successions, South China","authors":"Chao Liu, Jing Ding, Wenzhao Sun, Xueying Luan, Shasha Sun, Yong Yang, Mengsen Feng, Tanen Jiang, Jiayu Li","doi":"10.1007/s00531-023-02357-8","DOIUrl":"https://doi.org/10.1007/s00531-023-02357-8","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Frequent magmatism was a major event causing the mass extinction across the Permian/Triassic Boundary. In the current study, we determined magmatism characteristics from the Pingdingshan section at the Permian/Triassic Boundary using conodont-based geochemical proxies at a high-resolution scale (~ 50 kyr). Integrated trace elements (Mn, Sr, Rb, and Th) and stable/radioactive isotopes (δ<sup>18</sup>O, δ<sup>13</sup>C, and <sup>87</sup>Sr/<sup>86</sup>Sr) revealed that conodonts provided an ideal proxy for chemostratigraphic signatures of ancient seawater. The conodont-based, high-resolution <sup>87</sup>Sr/<sup>86</sup>Sr isotopes from the studied interval (250.50–252.00 Ma) displayed three decreasing cycles upwardly against a long-term increasing background, reflecting three episodes of magmatism. As a contrast, the conodont-based, high-resolution δ<sup>18</sup>O isotopes from this interval exhibited no episodic pattern, indicating that the δ<sup>18</sup>O isotopes of conodonts were limitedly influenced by marine magmatism. The high-resolution δ<sup>13</sup>C values of micrites displayed a pattern consistent with the trend of long-term background, revealing that the δ<sup>13</sup>C signatures of episodic magmatism were not inherited by micrites. The magmatism associated with the EPME event exerted great influences upon the Chihsian source rocks by introducing massive heat through hydrothermal fluids and causing pervasive oceanic anoxia.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":13845,"journal":{"name":"International Journal of Earth Sciences","volume":"9 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138517276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Provenance of far-traveled nappes in the eastern Mediterranean (Uppermost Unit, Crete): constraints from U–Pb zircon ages of detrital and igneous zircons 东地中海远行推覆体(克里特岛最上层)物源:来自碎屑和火成岩锆石U-Pb锆石年龄的制约

3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-04 DOI: 10.1007/s00531-023-02356-9

G. Zulauf, W. Dörr, R. Albert, S. O. Martha, P. Xypolias

{"title":"Provenance of far-traveled nappes in the eastern Mediterranean (Uppermost Unit, Crete): constraints from U–Pb zircon ages of detrital and igneous zircons","authors":"G. Zulauf, W. Dörr, R. Albert, S. O. Martha, P. Xypolias","doi":"10.1007/s00531-023-02356-9","DOIUrl":"https://doi.org/10.1007/s00531-023-02356-9","url":null,"abstract":"Abstract New U–Pb ages of detrital and igneous zircons of the Uppermost Unit of Crete shed light on its provenance and on Eohellenic to Eoalpine imprints in the eastern Mediterranean. The detrital zircons of all nappes show Variscan ages and are characterized by a Minoan-type age spectrum, which is typical for the NE margin of Gondwana. Parts of the metasedimentary rocks are unexpectedly young. Their detrital zircon ages continue via the Permian until the Late Triassic, Middle Jurassic and Early Cretaceous. The high-grade metamorphic rocks of the Asterousia crystalline complex are likely equivalents of the low-grade metamorphic trench and fore-arc deposits of the Vatos nappe pointing to Late Cretaceous slab roll back. The presence of both late Permian detrital zircons and Late Cretaceous arc-type granitoids suggest that the Uppermost Unit of Crete is derived from the late Permian/Late Cretaceous magmatic belt situated north of the Sava–Vardar–Izmir–Ankara Suture in the Strandja–Rhodope area. To achieve their recent position on Crete, the nappes had to travel more than 500 km. The traveling path is well tracked by rocks of the Upper Cycladic Unit, which are similar to those of the Uppermost Unit of Crete. The large displacement of the Cretan nappes was controlled not only by nappe transport, but probably also by dextral strike–slip along the North Anatolian Fault Zone and related counterclockwise rotation of the Anatolian block since the Eocene. Graphical abstract","PeriodicalId":13845,"journal":{"name":"International Journal of Earth Sciences","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135774734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface deformation and secondary effects of the January 18, 2021 (Mw 6.5) San Juan (Argentina) earthquake from remote sensing techniques 基于遥感技术的2021年1月18日(6.5 Mw)阿根廷圣胡安地震的地表变形和次生效应

3区地球科学

International Journal of Earth Sciences Pub Date : 2023-11-02 DOI: 10.1007/s00531-023-02354-x

Alejandro Oro, Pablo A. Blanc, Bruno Colavitto, Carolina Rivas, L. Martín Rothis, H. Nicolás Vargas, Laura P. Perucca

引用次数: 0

The anatomy of the 750 Ma Bavali shear zone in South India: did the integration of India into East Gondwanaland initiate in the mid-Neoproterozoic? 南印度750 Ma巴伐利剪切带的解剖:印度与东冈瓦纳大陆的整合是否开始于新元古代中期?

3区地球科学

International Journal of Earth Sciences Pub Date : 2023-10-30 DOI: 10.1007/s00531-023-02355-w

M. Swain, S. Rekha, S. Nanda, A. Bhattacharya

引用次数: 0

Establishment of the relationship between rock strength and topography: a novel approach to river morphometric analysis decoupling rock erodibility from active tectonics 岩石强度与地形关系的建立:一种新的河流形态分析方法，将岩石可蚀性与活动构造解耦

3区地球科学

International Journal of Earth Sciences Pub Date : 2023-10-26 DOI: 10.1007/s00531-023-02348-9

Dip Das, Jyotirmoy Mallik

引用次数: 0