Publications

Elemental Scientific Lasers’ Scientific Publications

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Tracking and imaging nano-plastics in fresh plant using cryogenic laser ablation inductively coupled plasma mass spectrometry

ID: 687258
Year: 2023
Products: NWR266;
Authors: Wang, Y;Bai, JJ;Wei, YJ;Zhao, CX;Shao, Z;Chen, ML;Wang, JH;
Journal: Journal of hazardous materials

Tracking and imaging of nano-plastics are extremely challenging, especially in fresh biological samples. Here, we propose a new strategy in which polystyrene (PS) was doped with the europium chelate Eu (DBM)3bpy to quantify, track, and in situ image nano-plastics in fresh cucumber based on inherent metals using cryogenic laser ablation inductively coupled plasma mass spectrometry (cryo-LA-ICP-MS). The cryogenic conditions provide a stable condition for imaging fresh cucumber, suppressing the evaporation of water in fresh plants, and maintaining the original structure of plants with respect to room temperature imaging in LA-ICP-MS. The plants were cultivated in two types of nano-plastics solutions with low (50 mg/L) and high (200 mg/L) con...

Thermoregulation in late cretaceous marine reptiles of Manitoba

ID: 687257
Year: 2023
Products: UP213;New Wave;New Wave Research;
Authors: Markstrom, V;
Journal: Thesis

The thermoregulation of mosasaurs and plesiosaurs have been debated within the field of paleontology for many years, specifically whether these marine reptiles were ectothermic or endothermic. Some degree of endothermy has been proposed for both mosasaurs and plesiosaurs based on histological, morphological, and geochemical methods. Geochemical studies have suggested elevated body temperature in mosasaurs and plesiosaurs compared to ambient seawater temperatures, but the topic remains understudied. For this study, bulk oxygen isotope paleothermometry was used to calculate the body temperatures for Late Cretaceous mosasaurs and plesiosaurs from the Pembina Member of the Pierre Shale in south-central Manitoba. Body temperatures were also calc...

内蒙古卫境地区查干哈达花岗岩体 岩石地球化学特征及成因.

ID: 687256
Year: 2023
Products: UP213;New Wave;
Authors: 李华明, ;李玲, ;
Journal: World Nuclear Geoscience

卫境地区属于华北板块北缘[1-2],行政区划上属于内蒙古自治区中部,该地区是我国重要的有色金属矿集区,同时也是稀土、煤等矿产的重要产出区[3-4]。2010 年以来,该区陆续发现多处热液型铀矿床,显示出良好的铀成矿前景。上述结果表明:卫境地区是重要的花岗岩型铀及多金属成矿远景区,对于研究区花岗岩成岩和成矿特征的认识是指导找矿和勘探的重要基础,但目前对这方面的研究还很欠缺。因此,该区有必要进行深入的岩石学、岩石地球化学等综合研究,进一步查明岩体成因,从而确定成矿特征及找矿方向。 据此,本文选择研究区内主要的产铀花...

Determination of Volcanic Ash Layers Source of Easter Caucasus Neogene Basin: Evidence from Zircon U-Pb Geochronology and Geochemistry

ID: 687255
Year: 2023
Products: UP213;New Wave;
Authors: Okrostsvaridze, A;Lee, YH;Keskin, M;Tormey, D;
Journal: Conference

This article presents new zircon U-Pb geochronology and whole rock geochemistry of the volcanic ash layers of the intermountain Neogene basin of the Eastern Caucasus. Our investigation in the region demonstrates that these ash layers, whose eruption source(s) have not been identified previously, have age and geochemical characteristics of the Kura (Mtkvari) ignimbrite flow of the Samtskhe-Javakheti volcanic highland. The current study shows that zircons from both formations crystallized at the same time ~7.50 Ma ago and have complete geochemical and morphological similarity. Taken together with the geography of the region (200-300 km from the volcanic source to the sedimentation areas), it is likely that the source of the ash layers was the...

Geología y geocronología del Cabo Blanco, Santa Cruz.

ID: 687254
Year: 2024
Products: UP213;New Wave;
Authors: Naipauer, M;Chemale, F;Navarrete, C;
Journal: Revista de la ASCOCIACION GEOLOGICA ARGENTINA

Cabo Blanco is located on the Atlantic coast, at the southern end of Golfo San Jorge (47°12' LS). The cape exposes rocks that were first identified by Darwin as quartzites comparable to those currently included in the Bahía Fox Formation of the Malvinas Islands. This correlation was followed by several authors who worked in the area up to the present. However, other authors interpreted these rocks as volcanic and included them within the Jurassic volcanism of extra-Andean Patagonia. In order to confirm the age of the possible Paleozoic quartzitic rocks, a field reconnaissance and a geochronological study were carried out. The zircons analyzed by U-Pb from two samples showed an age of 182.47 ± 2.01 Ma and 174.60 ± 2.46 Ma. According to t...

LA-ICP-MS Trace Element Composition of Stibnite from the Kizhnica-Hajvalia Badovc Ore Field, Kosovo

ID: 687253
Year: 2023
Products: UP193-FX;New Wave;
Authors: Mederski, S;Pršek, J;Kluza, K;
Journal: Conference

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Metal and Protein Correlation in the Brain and Eye in Alzheimer's Disease

ID: 687252
Year: 2023
Products: NWR193;New Wave;New Wave Research;
Authors: Hosseinpour Mashkani, SM;
Journal: Thesis

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Onset and Deglaciation of Cryogenian Snowball Earth

ID: 687251
Year: 2023
Products: UP213;New Wave;New Wave Research;
Authors: Pu, JP;
Journal: Thesis

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FIELD OF SCIENCE NATURAL SCIENCES

ID: 687249
Year: 2023
Products: UP193-FX;New Wave;
Authors: Mederski, S;
Journal: Thesis

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The origin and deep lithosphere evolution of the Jericho kimberlite, Slave craton

ID: 687248
Year: 2023
Products: UP213;New Wave;
Authors: Greene, SRS;
Journal: Thesis

Kimberlite and its inclusions represent the most direct window into the lithospheric mantle. This thesis aims to better resolve the origin and deep lithosphere evolution of kimberlite magmatism through geochemical analysis of material sampled by the Jericho kimberlite of the Slave craton in northern Canada. In Chapter 1, olivine grains are analysed for major elements and trace elements, and identified as peridotite xenocrysts, megacryst xenocrysts, and phenocrysts. Peridotite xenocrysts have Al-in-olivine temperatures indicating that they are derived from depths of ~150 km, the interface between the shallow and deep lithospheric mantle layers. Megacryst xenocrysts have positively-correlated Mg# and NiO content that can be reproduced by oliv...

Permian tectonic evolution of proto-Japan: Insights from detrital zircon geochronology and crystal morphology

ID: 687247
Year: 2023
Products: NWR213;
Authors: Ohkawa, M;
Journal: Thesis

Japan has evolved along the Paleo-Pacific Ocean as an arc-trench system in the Phanerozoic. However, the relationship between Japan and the older continental crust such as Sino-Korean and South China Blocks is unclear. This study compared published and new measured data of detrital zircon ages and morphology from Permian fore-arc accretionary complexes (Akiyoshi Belt) and back-arc basin deposits (Maizuru Belt) in Japan. The fore- and a part of back-arc deposits consist mainly of the late Paleozoic zircon grains that are close to the depositional ages and generally angular to subangular. These grains were supplied mainly from a volcanic arc isolated from the older continental crust, and the source rocks were exposed immediately prior to thei...

Simultaneous characterization of pathological vascular lesions and inflammation in a murine atherosclerosis model by molecular magnetic resonance imaging

ID: 687246
Year: 2023
Products: NWR213;
Authors: Mockel, J;
Journal: Thesis

Atherosclerosis is an inflammatory disease of arterial vessels characterized by structural changes of the vessel wall and the formation of atherosclerotic plaques. The remodeling processes take place in the intima part of the vessel wall. In this context increased endo-thelial permeability as well as infiltrating macrophages play an essential role as biomarkers for inflammatory processes and structural changes in the vessel wall. Magnetic resonance imaging (MRI) as a non-invasive imaging modality and the use of specific contrast agents are effective tools to detect pathological changes in early stages of atherosclerosis. In my study, I investigated the feasibility of the simultaneous use of a serum albumin-specific gadolinum-based contrast ...

Les minéralisations hydrothermales à l'interface socle-couverture de Vendée: origines et circulation des fluides, marqueurs de la dynamique extensive mésozoïque

ID: 687245
Year: 2023
Products: NWR193UC;ESI;
Authors: Bouat, L;
Journal: Thesis

De nombreuses ressources minérales d’origine hydrothermale se localisent à la discordance entre socle et couverture sédimentaire. Les processus de formation de ces minéralisations sont aujourd’hui encore largement débattus notamment la source des éléments, l’origine des fluides porteurs et les mécanismes de leurs circulations dans le contexte géodynamique. Ce travail de thèse s’intéresse aux minéralisations F-Ba-Pb-Zn±Ag de Vendée (France) déposées à proximité de la discordance entre le socle varisque et les sédiments du Bassin d’Aquitaine. Il s’attache à mieux contraindre l’origine des fluides, les modalités de leur circulation et la source des éléments. Pour déterminer les mécanismes de circulations ...

LA‐ICP‐MS and SEM‐EDX analyses for spatially resolved element detection in cement clinker phases

ID: 687244
Year: 2023
Products: NWR213;ESI;
Authors: Kleiner, F;Decker, M;Rößler, C;Hilbig, H;Ludwig, H;
Journal: ce/papers

This study combines 2D element mappings which allows a more detailed analysis of clinker phase composition by using the advantages of both methods. One mapping is obtained by laser ablation with inductively coupled plasma mass spectrometry (LA‐ICP‐MS), providing very good results for minor and trace element concentrations with a low spatial resolution. The other dataset is generated using energy dispersive X‐ray spectrometry (EDX) in a scanning electron microscope (SEM) which provides high‐resolution element mappings of cement clinker phases, with a low accuracy in chemical composition.It is revealed that this approach enables to determine the major and trace element concentrations in phases like alite, belite and the interstitial p...

Investigation of ion transport in hardened cement paste by LA‐ICP‐MS

ID: 687243
Year: 2023
Products: NWR213;ESI;
Authors: Stoklosa, A;Hilbig, H;Machner, A;
Journal: ce/papers

This study examined the impact of two different transport mechanisms and water/cement (w/c) ratios on the ingress depth of damaging ions into hardened cement paste (hcp). In addition, the effect of sample preparation, i.e. drying before and after exposure, is considered within this study. We applied Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA‐ICP‐MS) as an analytical method to determine the ion ingress depth. The results show that post‐drying of the samples (after exposure) significantly affects the ion ingress depth in hcp as determined by LA‐ICP‐MS. Our results confirmed, as previous studies, that ions ingress the hcp faster due to capillary suction than diffusion. This work shows that although LA‐ICP‐MS ...

Composition of olivines and spinel group minerals in aillikites from the Bushkanay dike, South Siberian Craton: Insights into alkaline melt sources and evolution

ID: 687242
Year: 2023
Products: NWR213;ESI;
Authors: Nugumanova, Y;Doroshkevich, A;Starikova, A;Garcia, J;
Journal: Geosystems and Geoenvironment

The potential sources and conditions that control the formation and evolution of alkaline melts are far from being fully understood. To address some of these fundamental questions, we have focused on the composition of olivines and spinel group minerals in aillikites from the Bushkanay dike in the Siberian Craton. These ultramafic carbonate-rich lamprophyres contain 40-50 vol% fresh olivine macrocrysts (200-600 µm) within a groundmass consisting of phlogopite (60%), magnetite (15%), perovskite (10%), apatite (5%), calcite (3%), chromite (1%), clinopyroxene (up to 1%), barite (up to 1%), serpentine and chlorite (up to 4%). Two types of compositional zoning in olivine have been recognized: (1) Mg-rich cores consisting of a relatively high #M...

Diversity on the Altiplano: Geochemical perspectives on 3,000 years of potting practices in the Lake Titicaca basin

ID: 687241
Year: 2024
Products: UP213;NewWave;
Authors: Klarich, E;Levine, A;Roddick, A;Zovar, J;Banikazemi, C;Dussubieux, L;Gabler, C;
Journal: Journal of Archaeological Science: Reports

Potters in the Lake Titicaca basin produced a wide variety of ceramic styles over the last 3000 years. Archaeologists have drawn on this variety across space and time to track processes such as the development of multi-community polities during the Late Formative (200 BC-AD 600), the origins and expansion of Tiwanaku (AD 600-1000), the creation and maintenance of political boundaries during the Late Intermediate period (AD 1000-1400), and the strategies of Inca conquest and consolidation (AD 1400-1534). We report on LA-ICP-MS research into Titicaca ceramics and clays conducted at the Field Museum’s Elemental Analysis Facility (EAF), and present the first review of raw materials and pottery analyzed from across the region. Ceramic samples ...

The composition and provenance of Late Bronze Age vitreous materials from Kefalonia, Greece

ID: 687240
Year: 2023
Products: UP213;New Wave;
Authors: Muros, V;Zacharias, N;Henderson, J;
Journal: Journal of Archaeological Science: Reports

In this study, we present the results of the analysis of Late Bronze Age (LBA) vitreous materials from three cemeteries on the island of Kefalonia, Greece (Mazarakata, Metaxata, and Kokkolata-Menegata). A multianalytical approach (EPMA, LA-ICP-MS, MC-ICP-MS [Sr-Nd]) was used to determine the composition and provenance of a group of 14 glass beads, a glass fragment, and a faience bead, all dating to the 14th-11th centuries BCE. Most of the beads were produced using a plant ash alkali with one having a mixed alkali composition. Identification of the colorants revealed that the blue glasses were colored using Cu, Co-Cu, or Co. Cobaltiferous alum from the Western Desert of Egypt imparted the blue color to the cobalt containing glasses. Trace el...

Investigating the Late Chalcolithic pottery production and consumption at Valencina de la Concepción (Seville, SW-Spain): An archaeometric analysis using petrographic and LA-ICP-MS techniques

ID: 687239
Year: 2024
Products: NWR193;ESI;TwoVol2;
Authors: Kibaroğlu, M;Schuhmacher, T;Mederos, A;Falkenstein, F;Manuel Vargas, J;Mertz-Kraus, R;Hacıosmanoğlu, S;
Journal: Journal of Archaeological Science: Reports

This paper discusses the results of an archaeometric analysis carried out on undecorated Late Chalcolithic ceramics from Valencina de la Concepción, which is one of the largest and most important Chalcolithic settlements in the southern Iberian Peninsula. The purpose of the study is to contribute to the debate on the socio-economic organization and exchange networks of the site during the third millennium BCE in the Lower Guadalquivir Basin. Petrographic and chemical analysis by LA-ICP-MS of compressed ultrafine powder pellets were used to analyze selected ceramic samples (n = 42) from Valencina and reference clay samples (n = 62) from different locations in the Aljarafe plateau. This study sheds light on possible raw material sources, the...

Guadalupian-Lopingian (Middle-Late Permian) radiolarians from clastic rocks and zircon U-Pb ages of intercalated tuff and tuffaceous sandstone on Sado Island, central Japan

ID: 687238
Year: 2023
Products: UP213;New Wave;
Authors: Kurihara, T;Suzuki, K;Ito, T;Ishida, H;Ueda, H;Matsuoka, A;
Journal: Revue de Micropaléontologie

We investigated Permian strata in the Ota area of the Kosado Hills, Sado Island, central Japan, and their depositional ages were determined based on radiolarian biostratigraphy and zircon U-Pb dating. We also focused on the geology of the region and its lithologic correlation with other geological units in the Inner Zone of Southwest Japan. The radiolarian analysis identified the presence of Follicucullus porrectus and F. dilatatus in mudstone exposed on the coastline of Ota, indicating a middle-late Capitanian to early Changhsingian age. Mudstone exposed along the forest road in the Ota area contained Cariver charveti, suggesting a late Capitanian-early Changhsingian age. Zircon U-Pb dating of the tuff layer intercalated within the Follicu...

高レベル放射性廃棄物中の Zr-93 迅速分析に向けた LA-ICP-MS による固体試料中 Zr 同位体測定法の開発

ID: 687237
Year: 2023
Products: NWR213;
Authors: 森井志織, ;蓬田匠, ;浅井志保, ;大内和希, ;岡壽崇, ;
Journal: 分析化学

抄録 高レベル放射性廃棄物(HLW)等の処分時の安全評価対象核種のひとつであるZr-93のICP-MS定量分析をより迅速化する手法として,Zrを選択的に固相抽出した試料をそのままレーザーアブレーション(LA)してICP-MSで定量分析する技術開発を行った.DGAレジンにZrのみを吸着させる新規Zr固体試料調製法により,試料調製時間を従来よりも大幅に短縮した.Zr固体試料をLA-ICP-MS測定するための最適なレーザー照射条件を検討した.開発した手法をHLW模擬試料中のZr同位体定量に適用した結果,IDMSにより求めた同位体定量値は試料の元素濃度から求めた含有量と�...

Sr-Nd and zircon Hf isotopic constraints on petrogenesis of the Early Cretaceous diorite in the Jinjingzui gold deposit, southeast Hubei Province

ID: 687236
Year: 2023
Products: UP213;New Wave;
Authors: Yan, LI;Chun, C;Shaoming, SU;Jianfeng, GAO;
Journal: GEOLOGY IN CHINA

This paper is the result of geological survey engineering. Objective The petrogenesis and magmatic origin of the early Cretaceous diorite in Jinjingzui gold deposit are of great significance for the diagenetic and metallogenic relations and perfecting the regional metallogenic regularity. Methods In this study we report the Sr-Nd and zircon Hf isotopic compositions of diorite in Jinjingzui deposit. Results The results show that the diorite has relative high initial 87Sr/86Sr ratio (0.7059-0.7062), negative εNd(t) values (-7.93--7.58) and εHf(t) values (-12.2--6.5), suggesting the magma was derived from partial melting of an enrichment mantle, followed by magma differentiation. There may be continental crust contamination during magmatic e...

Identification of new igneous carbonatites in the Bayan Obo area, Inner Mongolia

ID: 687235
Year: 2023
Products: UP213;New Wave;
Authors: Le, HU;Yike, LI;Sheng, SUN;Ruiping, LI;
Journal: GEOLOGY IN CHINA

This paper is the result of mineral exploration engineering. Objective The formation of the giant Bayan Obo REE deposit is closely related to carbonatitic magmatism. Near the ore district, southwest of West Ore Body, there are carbonate rocks with a certain scale covered by Mesozoic-Cenozoic sediments, the genesis of which can indicate the formation process of the well-known Bayan Obo deposit. Methods This contribution demonstrates that these rocks are actually igneous by the detailed study on petrology and mineralogy. Results The rocks were little affected by fluid metasomatism and can be divided into dolomite type and calcite type according to their mineral compositions. Bulk rock analysis shows that these carbonatites are rich in Sr (>49...

东昆仑东段到木提岩体成因及构造意义: 来自年代学及地球化学的约束

ID: 687234
Year: 2023
Products: UP213;New Wave;
Authors: 韩建军, ;李红刚, ;何俊, ;赵明福, ;韩旭, ;张新远, ;柴云, ;
Journal: 西北地质

The Daomuti intrusive rocks is located in the eastern section of the East Kunlun orogenic belt, and mainly includes monzogranite, granodiorite and diorite. In this paper, zircon U-Pb dating and petrogeochemical tests are performed on newly discovered diorite to determine its crystalline age and petrogenesis. Comprehensively analyse the petrogeochemical characteristics of monzogranite and granodiorite, and discuss the emplacement age, rock genesis and tectonic evolution of the Daomuti intrusive rocks. LA-ICP-MS zircon U-Pb dating analysis shows that the 206Pb/238U weighted average age of diorite is (244.6±1.8) Ma, and the crystallization age of the diorite is Early Triassic. The geochemical characteristics of the monzogranite and granodiori...

造山带洋陆转换过程与岩浆作用: 以东昆仑都兰地区古生代花岗岩为例

ID: 687233
Year: 2023
Products: UP213;NewWave;
Authors: 赵梦琪, ;于淼, ;刘潇扬, ;龚磊, ;曾庆鸿, ;
Journal: 西北地质

摘要: 洋陆转换过程中俯冲−碰撞(增生)−后碰撞各阶段具有不同岩浆作用,其中板片俯冲和岩石圈拆沉−减薄机制尤其受到关注。东昆仑造山带位于青藏高原北部,是秦祁昆中央造山带的重要组成部分,在早古生代经历了原特提斯洋陆转化过程。笔者通过对东昆仑东段都兰地区古生代花岗岩进行年代学、全岩地球化学和Sr−Nd−Hf同位素研究,认为浪木日中志留世(429±4 Ma)花岗岩形成于洋壳俯冲阶段,具有埃达克质岛弧岩浆属性,与热俯冲机制下的洋壳部分熔融有关;希望沟与哈日扎早泥盆世(416~403 Ma)花岗岩形成于后碰撞阶段,分别显示I型和A型花岗岩�...

海南岛原特提斯洋演化——来自安山岩年代学和地球化学证据

ID: 687232
Year: 2023
Products: NWR193;
Authors: 杜宇晶, ;周云, ;刘希军, ;蔡永丰, ;宋宏星, ;
Journal: 吉林大学学报(地球科学版

Hainan Island is located at the intersection of Pacific, Indo-Australian and Eurasian plates. It is an ideal location to reveal the tectonic evolution of plate tectonics. In order to gain a better understanding of the Early Paleozoic tectonic evolution of the island, systematic zircon U-Pb geochronological and Hf isotopic analyses of the andesite from the northwestern Hainan Island have been carried out. The results of zircon U-Pb dating show that two representative andesite samples yield ages of LA-ICP-MS(448±5) Ma and (447±11) Ma, respectively. This suggests that Early Paleozoic (Late Ordovician) magmatism occurred on the Island. In-situ zircon Hf isotopic results show that the εHf(t) values of the andesites are -16.48-5.22 and their t...

北部九州白亜紀花崗岩類, 油須原花崗岩優黒質斑状岩相の産状と化学組成

ID: 687231
Year: 2023
Products: UP213;New Wave;New Wave Research;
Authors: 柚原雅樹, ;西瑛莉子, ;清浦海里, ;亀井淳志, ;川野良信, ;
Journal: 地球科学

北部九州東部に分布する油須原花崗岩の優黒質斑状岩相の主成分ならびに微量成分元素組成測定,希土類元素ならびにSr・Nd同位体比測定を行った.優黒質斑状岩相は,主に普通角閃石 -黒雲母花崗閃緑岩~花崗岩からなり,朝倉花崗閃緑岩赤岩体と油須原花崗岩の境界部と油須原花崗岩中に点在する.優黒質斑状岩相のモード組成と全岩化学組成は,主岩相と朝倉花崗閃緑岩赤岩体の間にある.朝倉花崗閃緑岩赤岩体から,98 .7±0.6 MaのU-Pbジルコン年代が得られた.この年代は,朝倉花崗閃緑岩の活動時期を示しており,油須原花崗岩主岩相の活動時期と同�...

Apatite as an Indicator of Pge Mineralization Formation as Exemplified by Anorthosites of the Kievey Deposit, Fedorova-Pana Layered Complex, Kola Peninsula

ID: 687230
Year: 2023
Products: NWR213;ESI;
Authors: Sushchenko, A;Groshev, N;Rundkvist, T;Kompanchenko, A;Savchenko, Y;
Journal: preprints.org

This paper presents petrography, EDS, LA-ICP-MS, and Raman spectroscopy data characterizing mineral associations and composition of apatite group minerals from anorthosites of the Kievey deposit, North PGE Reef, Fedorova-Pana Complex, Russia. The mineralized coarse-grained anorthosite belongs to the most common rock type of the main ore body and hosts irregular interstitial sulfide dissemination of 5-7 vol. %. Apatite in the anorthosite forms a) euhedral grains included in the marginal parts of cumulus plagioclase laths, and b) xenomorphic grains associated with intercumulus minerals. The composition of apatite evolves along a narrow trend from fluorapatite to hydroxylapatite. The F content in apatite reaches 2.21 wt. %; the maximum Sr and ...

A Cryptotephra Layer in Sediments of an Infilled Maar Lake from the Eifel (Germany): First Evidence of Campanian Ignimbrite Ash Airfall in Central Europe

ID: 687229
Year: 2023
Products: NWR193;NewWave;
Authors: Schenk, F;Hambach, U;Britzius, S;Veres, D;Sirocko, F;
Journal: preprints.org

We analyzed mineralogical characteristics, and major as well as rare earth element concentrations from a cryptotephra layer in sediments of the infilled maar of Auel (Eifel, Germany). The results of detailed geochemical analyses of clinopyroxenes and their glassy rim of the specific layer are most similar to those from the Campanian Ignimbrite (CI) Tephra occurrence in a loess section at Urluia (Romania). Both records show idiomorphic green clinopyroxenes and formation of twisted minerals up to millimeter scale. The cryptotephra in the Auel core has an age of around 39,940 yr b2k in the ELSA-20 chronology, almost identical to the latest Ar/Ar dates for the Campanian Ignimbrite/Y5 eruption. These observations suggest that parts of the CI ash...

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