Geochronometria最新文献_第6页

Chronology of seafloor massive sulfides formation within the Pobeda hydrothermal cluster (Mid-Atlantic Ridge) 波贝达热液群（大西洋中脊）海底块状硫化物形成的年代

IF 1.2 4区地球科学

Geochronometria Pub Date : 2020-01-01 DOI: 10.2478/geochr-2020-0019

V. Kuznetsov, G. Cherkashov, K. Kuksa, A. Firstova, F. Maksimov, V. Bel’tenev, L. Lazareva, S. Levchenko, N. Baranova

引用次数: 4

Oxygen isotopic fractionation in rat bones as a result of consuming thermally processed water – bioarchaeological applications 消耗热处理水导致大鼠骨骼中的氧同位素分馏——生物考古学应用

IF 1.2 4区地球科学

Geochronometria Pub Date : 2020-01-01 DOI: 10.2478/geochr-2020-0001

A. Lisowska-Gaczorek, K. Szostek, J. Pawlyta, Beata Cienkosz-Stepańczak

{"title":"Oxygen isotopic fractionation in rat bones as a result of consuming thermally processed water – bioarchaeological applications","authors":"A. Lisowska-Gaczorek, K. Szostek, J. Pawlyta, Beata Cienkosz-Stepańczak","doi":"10.2478/geochr-2020-0001","DOIUrl":"https://doi.org/10.2478/geochr-2020-0001","url":null,"abstract":"Abstract Stable isotope analyses of oxygen are used in anthropology for such purposes as determination of origin of individuals, tracking migration routes or dynamics of human community relocation. The methodology related to oxygen isotope analysis has been founded on the relationship between its isotopic composition within phosphate groups of bone tissue (δ18Op) in individuals being analysed and the water consumed by such individuals (δ18Ow). Such a relationship has been observed in many species of mammals, including humans. However, the influence of culinary practices on the isotopic delta values of apatite phosphates of individuals has not yet been researched. The present study, which was conducted using laboratory rats, is an investigation of the influence of the thermal processing of water drank by such rats on the isotopic composition (δ18Op) of bone apatite. Increasing the value of the isotopic composition of water by about 6.1 ‰ during boiling resulted in an increase in the oxygen isotopic value δ18Op of rats drinking the water by about 4 ‰ (29%). It can be expected that regular consumption of heavily isotopic drinks and foods by humans may cause the δ18Op of individuals to exceed the range of isotopic environmental variability, even by a few per mille.","PeriodicalId":50421,"journal":{"name":"Geochronometria","volume":"47 1","pages":"1 - 12"},"PeriodicalIF":1.2,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44710644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3

A new quartz for 𝛾-transfer calibration of radiation sources 一种用于𝛾-transfer辐射源校准的新型石英

IF 1.2 4区地球科学

Geochronometria Pub Date : 2020-01-01 DOI: 10.2478/geochr-2020-0020

D. Richter, C. Woda, K. Dornich

引用次数: 6

Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai 富有机矿床的放射性碳定年：俄罗斯阿尔泰高原古地理解释的难点

IF 1.2 4区地球科学

Geochronometria Pub Date : 2020-01-01 DOI: 10.2478/geochr-2020-0018

R. Nepop, A. Agatova, M. Bronnikova, E. Zazovskaya, I. Ovchinnikov, P. Moska

{"title":"Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai","authors":"R. Nepop, A. Agatova, M. Bronnikova, E. Zazovskaya, I. Ovchinnikov, P. Moska","doi":"10.2478/geochr-2020-0018","DOIUrl":"https://doi.org/10.2478/geochr-2020-0018","url":null,"abstract":"Abstract The high mountainous southeastern part of Russian Altai is characterized by complicated sedimentation history. As a result of tectonic movements, Paleogene, Neogene, and even more old Carboniferous and Jurassic organicrich deposits had been partly uplifted and exhumed on the ridge’s slopes, where during the Pleistocene, they were affected by various exogenous processes including glaciation, glacio-fluvial erosion, winnowing activity of ice-dammed lakes, sliding during lake-draining events, followed by further intensive Holocene erosion, pedogenesis, and permafrost formation/degradation. Remobilized ancient organic matter had been involved into geomorphic and pedogenesis processes and affected the results of radiocarbon dating. Numerous radiocarbon ages obtained revealed several typical problems in interpretation of dating results, which was confirmed by multidisciplinary investigations of associated sediments in a wider regional context. This article presents a discussion on obtained apparent radiocarbon dates of organic material from ten sections of the SE Altai. In addition to radiocarbon analysis, in each case multidisciplinary study was carried out in order to properly interpret obtained dates, as well as to explain the inability of directly using apparent 14C ages as a geochronological basis for paleogeographical reconstruction. The analysis presented is of vital importance for establishing the chronology of formation of large ice-dammed lakes and their cataclysmic draining; revealing chronology and paleoenvironmental conditions of pedogenesis in the highlands of the SE Altai; and estimating the range and magnitude of the tectonically driven topography rebuilding in the post-Neogene time.","PeriodicalId":50421,"journal":{"name":"Geochronometria","volume":"47 1","pages":"138 - 153"},"PeriodicalIF":1.2,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44496350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3

14C Dating of mortar from ruins of an early medieval church Hohenrätien GR, Switzerland 14C中世纪早期教堂废墟中灰泥的年代测定Hohenrätien GR，瑞士

IF 1.2 4区地球科学

Geochronometria Pub Date : 2020-01-01 DOI: 10.2478/geochr-2020-0027

I. Hajdas, M. Maurer, Maria Belen Röttig

引用次数: 0

Tree-ring reconstruction of June-July mean temperatures in the northern Daxing’an Mountains, China 大兴安岭北部6-7月平均气温的树木年轮重建

IF 1.2 4区地球科学

Geochronometria Pub Date : 2020-01-01 DOI: 10.2478/geochr-2020-0007

Yangao Jiang, Yu Wang, Jun-hui Zhang, Shijie Han, C. Coombs, Maricely Escobedo, Junwei Wang, Xiaoguang Wang, Lin Hao, Guode Li, Yijiang Tong, Yue Gu, Shengzhong Dong, Haisheng He, Jingyu Yang

{"title":"Tree-ring reconstruction of June-July mean temperatures in the northern Daxing’an Mountains, China","authors":"Yangao Jiang, Yu Wang, Jun-hui Zhang, Shijie Han, C. Coombs, Maricely Escobedo, Junwei Wang, Xiaoguang Wang, Lin Hao, Guode Li, Yijiang Tong, Yue Gu, Shengzhong Dong, Haisheng He, Jingyu Yang","doi":"10.2478/geochr-2020-0007","DOIUrl":"https://doi.org/10.2478/geochr-2020-0007","url":null,"abstract":"Abstract In this study, the mean temperature of June to July was reconstructed for the period of 1880 to 2014 by using the Larix gmelinii tree-ring width data for the Mangui region in the northern Daxing’an Mountains, China. The reconstruction accounts for 43.6% of the variance in the temperature observed from AD 1959–2014. During the last 134 years, there were 17 warm years and 17 cold years, which accounted for 12.7% of the total reconstruction years, respectively. Cold episodes occurred throughout 1887–1898 (average value is 14.2°C), while warm episodes occurred during 1994–2014 (15.9°C). Based on this regional study, the warmer events coincided with dry periods and the colder events were consistent with wet conditions. The spatial correlation analyses between the reconstructed series and gridded temperature data revealed that the regional climatic variations were well captured by this study and the reconstruction represented a regional temperature signal for the northern Daxing’an Mountains. In addition, Multi-taper method spectral analysis revealed the existence of significant periodicities in our reconstruction. Significant spectral peaks were found at 29.7, 10.9, 2.5, and 2.2 years. The significant spatial correlations between our temperature reconstruction and the El Niño–Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO) and Solar activity suggested that the temperature in the Daxing’an Mountains area indicated both local-regional climate signals and global-scale climate changes.","PeriodicalId":50421,"journal":{"name":"Geochronometria","volume":"47 1","pages":"13 - 22"},"PeriodicalIF":1.2,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43400865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Interaction between stem damage, crown vitality and growth performance of European yew in Central–East Europe 中东欧地区欧洲红豆杉茎害、树冠活力与生长性能的相互作用

IF 1.2 4区地球科学

Geochronometria Pub Date : 2020-01-01 DOI: 10.2478/geochr-2020-0029

Denisa Sedmáková, M. Saniga, J. Pittner, J. Vencurik, R. Sedmák

{"title":"Interaction between stem damage, crown vitality and growth performance of European yew in Central–East Europe","authors":"Denisa Sedmáková, M. Saniga, J. Pittner, J. Vencurik, R. Sedmák","doi":"10.2478/geochr-2020-0029","DOIUrl":"https://doi.org/10.2478/geochr-2020-0029","url":null,"abstract":"Abstract As long-lived, slow-growing tree species, European yew (Taxus baccata L.) has considerable potential for dendrochronological use. The increasing probability of decline and the worsening of yew health status endanger the species diversity of temperate forests. In 2015–2017, we sampled adult yew populations with scattered occurrence in limestone beech forests (Fagetum dealpinum), in which yew trees exhibit the top growth performance. Altogether, 150 trees were sampled (294 cores) at four localities. By using the general linear model, we investigated the interactions between stem and crown status, sex and growth performance of yew trees. Based on the previous results and innovative measures of competition and canopy closure, we explored the promotion of silviculture care for female over the male trees and formulated exact release cutting rules. The results demonstrate divergent growth trends between male and female trees and the pronounced negative effects of crown and stem damage on growth performance of European yew. Expected decreases in radial growth of damaged female trees in comparison with male ones is less confirmed. Despite this, making silvicultural treatments for females as a priority is recommendable. Our findings can improve the effectiveness of forest management and restoration activities in European temperate forests, where yew adults are threatened by the higher degree of shading and herbivory pressure.","PeriodicalId":50421,"journal":{"name":"Geochronometria","volume":"47 1","pages":"35 - 53"},"PeriodicalIF":1.2,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41468486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Phylogenetic and morphological classification of Ophiocordyceps species on termites from Thailand. 泰国白蚁上的虫草属物种的系统发育和形态分类。

IF 2.8 4区地球科学

Geochronometria Pub Date : 2019-07-29 eCollection Date: 2019-01-01 DOI: 10.3897/mycokeys.56.37636

Kanoksri Tasanathai, Wasana Noisripoom, Thanyarat Chaitika, Artit Khonsanit, Sasitorn Hasin, Jennifer Luangsa-Ard

{"title":"Phylogenetic and morphological classification of Ophiocordyceps species on termites from Thailand.","authors":"Kanoksri Tasanathai, Wasana Noisripoom, Thanyarat Chaitika, Artit Khonsanit, Sasitorn Hasin, Jennifer Luangsa-Ard","doi":"10.3897/mycokeys.56.37636","DOIUrl":"10.3897/mycokeys.56.37636","url":null,"abstract":"Seven new species occurring on termites are added to Ophiocordyceps - O. asiatica, O. brunneirubra, O. khokpasiensis, O. mosingtoensis, O. pseudocommunis, O. pseudorhizoidea and O. termiticola, based on morphological and molecular phylogenetic evidence. O. brunneirubra possesses orange to reddish-brown immersed perithecia on cylindrical to clavate stromata. O. khokpasiensis, O. mosingtoensis and O. termiticola have pseudo-immersed perithecia while O. asiatica, O. pseudocommunis and O. pseudorhizoidea all possess superficial perithecia, reminiscent of O. communis and O. rhizoidea. Phylogenetic analyses based on a combined dataset comprising the internal transcribed spacer regions (ITS) and the largest subunit (LSU) of the ribosomal DNA, partial regions of the elongation factor 1-α (TEF) and the largest and second largest subunits for the RNA polymerase genes (RPB1, RPB2) strongly support the placement of these seven new species in Ophiocordyceps.","PeriodicalId":50421,"journal":{"name":"Geochronometria","volume":"43 1","pages":"101-129"},"PeriodicalIF":2.8,"publicationDate":"2019-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6684523/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88905019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A continuous stable isotope record of last interglacial age from the Bulgarian Cave Orlova Chuka 保加利亚Orlova Chuka洞穴最后一次间冰期的连续稳定同位素记录

IF 1.2 4区地球科学

Geochronometria Pub Date : 2019-01-01 DOI: 10.1515/geochr-2015-0107

J. Pawlak, M. Błaszczyk, H. Hercman, Šárka Matoušková

{"title":"A continuous stable isotope record of last interglacial age from the Bulgarian Cave Orlova Chuka","authors":"J. Pawlak, M. Błaszczyk, H. Hercman, Šárka Matoušková","doi":"10.1515/geochr-2015-0107","DOIUrl":"https://doi.org/10.1515/geochr-2015-0107","url":null,"abstract":"Abstract Recent research shows that the last interglacial climate was more unstable in comparison to Holocene. Lack of suitable dating techniques and precisely defined absolute age benchmarks is one from main problems for present LIG studies. Therefore many of LIG chronologies base on indirect dating techniques like record alignment strategies. In this context, speleothems are valuable paleoclimate archives because of their capability to be dated by U-series method. In Europe LIG speleothem records are known mostly from western and central part of the continent. In this paper we present a 1,650 mm long stalagmite (ocz-6) from Bulgarian Cave Orlova Chuka. The ocz-6 stalagmite records the period of time ca. 129–112 ka. Ocz-6 stalagmite was analyzed in terms of stable isotopic composition of calcite and trace elements content. All analyzed geochemical proxies point to dynamic changes in the environment during the Last Interglacial time. At the time of interglacial development (129–126.5 ka), ocz-6 records shows systematic change in proportion of moisture delivered from Atlantic source and other sources. The beginning of last interglacial optimum is connected with a rapid change to more humid and warm conditions. During interglacial demise local climate become more dependent from regional settings.","PeriodicalId":50421,"journal":{"name":"Geochronometria","volume":"46 1","pages":"87 - 101"},"PeriodicalIF":1.2,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44346666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Cadomian protolith ages of exotic mega blocks from Bugaj and Andrychów (Western outer Carpathians, Poland) and their palaeogeographic significance Bugaj和Andrychów（波兰外喀尔巴阡山脉西部）外来巨型块体的Cadomian原岩时代及其古地理意义

IF 1.2 4区地球科学

Geochronometria Pub Date : 2019-01-01 DOI: 10.1515/GEOCHR-2015-0102

J. Burda, B. Woskowicz-Ślęzak, U. Klötzli, A. Gawęda

{"title":"Cadomian protolith ages of exotic mega blocks from Bugaj and Andrychów (Western outer Carpathians, Poland) and their palaeogeographic significance","authors":"J. Burda, B. Woskowicz-Ślęzak, U. Klötzli, A. Gawęda","doi":"10.1515/GEOCHR-2015-0102","DOIUrl":"https://doi.org/10.1515/GEOCHR-2015-0102","url":null,"abstract":"Abstract This study presents the first zircon U-Pb LA-MC-ICP-MS ages and whole-rock Rb/Sr and Sm/Nd data from exotic blocks (Bugaj and Andrychów) from the Western Outer Carpathians (WOC) flysch. The CL images of the zircon crystals from both samples reveal typical magmatic textures characterized by a well-defined concentric and oscillatory growth zoning. A concordia age 580.1 ± 6.0 Ma of the zircons from the Bugaj sample is considered to represent the crystallization age of this granite. The zircon crystals from the Andrychów orthogneiss yield an age of 542 ± 21 Ma, interpreted as the uppermost Proterozoic, magmatic crystallization age of the granitoid protholith. The initial (at ca. 580 Ma) 87Sr/86Sr ratios of the Bugaj granitoids (0.72997 and 0.72874) are highly radiogenic, pointing to the assimilation of an older, possibly strongly Rb enriched source to the Bugaj melt. The Nd isotope systematics (εNd580 –1.4 and 0.4) also point to a significant contribution of such a distinct mantle source. On the basis of the sequence of magmatic events obtained from U-Pb zircon ages, we suggest that exotic mega blocks deposited to the WOC basins were related to the Brunovistulicum Terrane. They belong to the group of Vendian/Cambrian granitoids representing the latest, posttectonic expression of the Cadomian cycle.","PeriodicalId":50421,"journal":{"name":"Geochronometria","volume":"46 1","pages":"25 - 36"},"PeriodicalIF":1.2,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47114220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 6