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INTRODUCTION. Iron oxide-(Cu-Au) (iron oxide, cop- per, gold—IOCG) deposits are a class of ore deposits whose defining characteristics vary.. during redox changes (Schauble et al. 2001, Johnson et al. 2002, Balci et al. 2006); thus, Fe isotope geochemistry has been used as an .... U-Pb SHRIMP and Sm-Nd isotopic ages were determined for felsic metavolcanic rocks from the Silvânia Sequence and Jurubatuba Granite in the central part of .... Developed by Kenneth R. Ludwig over a period of two decades, Isoplot is a user-friendly toolbox that allows geologists to calculate and visualise .... Download scientific diagram | Uranium-evolution curve, produced with Isoplot (Ludwig, 2001), shows the results of U-series analyses of speleothems used in .... FitPDF is a program to facilitate the calculation and graphing of probability distributions for data with associated analytical uncertainties.. Samples KR1 and SH3B were run on the 2nd August 2016 and SH5A to SH5E on the. 5th May 2017, at the Department of Geology, Trinity College Dublin.. TABLE 1. Revised faunal list for the Purple Bench Locality (TMM 41672). Compiled from (West, 1982; Gustafson, 1986; Wilson, 1986b; Walton, 1993; .... ABSTRACT. The Heart Mountain slide is the largest terrestrial landslide deposit as yet recognized on Earth. The slide covers an area of at least 3400 km2, .... Wolframite [(Fe,Mn)WO4] forms an isomorphous solid-solution series between the iron-rich endmember ferberite [FeWO4] and.. OSMIUM ISOTOPIC EVIDENCE AGAINST AN IMPACT AT THE. FRASNIAN-FAMENNIAN BOUNDARY. G. W. GORDON*,**,†, M. ROCKMAN**,§, K. K. TUREKIAN**, and J. OVER§§.. Zircon grains were concentrated using conventional mineral separation techniques, including crushing and pulverizing, followed by separation using a Frantz .... Ma which is in excellent agreement with the reported ID-TIMS age of 337.1 ± 0.4 Ma. The. Pb/U precision for the 91500 (4.5%, 6.9%) and QGNG (3.9%, .... {"id": "", "title": "isoplot ludwig download", "mimeType": "application\/pdf"}. Couldn't preview file. There was a problem loading more pages. Retrying.. Abstract. Raw data for two new U-Pb zircon dates from the southern Nicola arc are reported here. These dates extend the age and spatial limits of.. The crystalline basement of the Aravalli Craton is a heterogeneous assemblage dominated by granitic gneisses and granites with sporadic occurrences of .... Post-data processing was performed using Iolite Paton et al., 2011 and concordia and weighted mean plots were produced with Isoplot Ludwig, 2003 .. ABSTRACT. Jurassic kimberlites in South Australia have entrained sub lithospheric mafic granulites and eclogites from the eastern margin of the Australian .... Sm-Nd analyses were carried out in 41 shales (within the anquizone), slates and phyllites whole-rock samples from seven Cambrian and Ordovician units of the .... The geochronological constraints on the magmatic events asso ciated with orogenic processes contribute to a better under standing of the overa11 evolution .... Introduction. Improving analytical performance and growing instrumental capacities result in a growing number of high quality U/Pb and Th/Pb .... ACKNOWLEDGEMENTS. I would like to thank my advisor, Professor Kate Maher, for having the confidence in me to set out and plan a senior thesis while also .... New field data, geochemical analyses and zircon U-Pb LA-ICP MS data were obtained on plutonic and volcanic rocks of the Mocoa Batholith and Saldaña Formation in .... Fig. 10. Resolving mechanisms of isotope fractionation using a three-isotope diagram. Baffin Island olivine and whole rock data are plotted.. The pre-Mesozoic basement areas of the external Alpine domain (e.g. Aiguilles-Rouges Mont-Blanc,. Aar Gotthard crystalline massifs) are underlain by former .... London Geochronology Centre. University College London p.vermeesch@ucl.ac.uk. LAICPMS workshop, Charleston, March 7, 2013 .... rocks near the Hongshishan ophiolitic belt are mostly dated by Ar-Ar method more than ten. 66 years ago (Jiang and Nie, 2006a, b; Nie et al., 2002).. Disturbances of the U-Th-Pb systems in drill-core samples of the Eye-Dashwa. Lakes pluton are related to a fracturing event in the Early Proterozoic and.. The world-class Shizhuyuan W–Sn–Mo–Bi deposit is spatially related to the Qianlishan granite complex (QGC) in Hunan Province, China.. Site Locations and Geochronology. The BGB dacite has been dated at 3445 ± 8 Ma. (Armstrong et al., 1990), 3445 ± 3 Ma (Kröner.. isoplot_ludwig_. Fig. 1. Hf-W isochrons for CAIs. Error bars represent 2σ uncertainties, m = initial. 182Hf/180Hf, i = initial εW. Regressions (model 1) were calculated .... Abstract: This paper presents usages, examples, and mathematical backgrounds of a Python script,. UPbplot.py, which was newly developed for calculation and .... Set in Barberton, Living Waters Accommodations Barberton offers accommodations with an outdoor pool, free WiFi, a shared lounge and a Get instant .... This Open-File Report makes available raw analytical data from laboratory procedures completed to determine the age of rock.. Information contained in this publication or product may be reproduced, in part or in whole, and by any means, for personal or public non-commercial .... The stepHeat function will evaluate data from stepwise heating experiments, producing an Ar/Ar age spectrum, a weighted mean age with uncertainty, and other .... palaeogeography'. 3. 4. Benjamin Clements & Robert Hall. 5. 6. 7. 1. Methods. 8. Samples were separated using standard crushing, magnetic and heavy liquid .... The fundamentally different isotopic compositions of non-carbonaceous (NC) and carbona- ceous (CC) meteorites reveal the presence of two distinct reservoirs .... Download scientific diagram | Zircon U/Pb concordia diagrams (plotted using ISOPLOT, Ludwig, 2003) for igneous rocks analyzed in this study.. In northeastern Mexico, volcanic rocks interbedded with Late Triassic–Jurassic siliciclastic and evaporitic strata have been linked to magmatic arcs .... (a). (b). (c). (c). (d). (e). (e). (e). (e). (f). ASH-15D (ETHZ). 2. 2.165. 2.24. 0.002. 0.009. 0.0931. 82.28%. 1.23. 1.63. 105. 3. 2.392. 1.26. 0.001.. We present an analytical protocol for in situ U–Pb isotope dating of wolframite series minerals [(Fe,Mn)WO4], the main ore mineral for tungsten, .... Figure 25 : Age moyen des pyrites de Nassara (Isoplot, Ludwig, 2008) - "Les gisements d'or comme témoins de l'histoire géologique du craton oues-africain .... Back to Table of Contents. 41183-GB2 Dominican Republic Corals as High-Resolution Records of Shallow Marine Paleoenvironmental Conditions Prior to Closure .... Zircon and monazite from granitic sheets and dikes in the Monashee complex, Canadian Cordillera, were investigated to determine.. Drilling at Bougainville Guyot (Ocean Drilling Program Site 831), New Hebrides Island Arc during Leg 134 revealed that. 727.5 m of carbonate overlies an .... U–Pb geochronology of bentonites from the Upper Cretaceous Kanguk Formation, Sverdrup Basin, Arctic Canada: constraints on sedimentation rates, .... In this report, are presented U-Pb isotopic and electron beam imaging data from seven samples that were collected during the fieldwork session July – August .... Chemical Geology 233 (2006) 358 – 363 www.elsevier.com/locate/chemgeo Short communication Comment: Hf-isotope heterogeneity in zircon 91500 W.L. Griffin ⁎ .... Monazite-bearing Alpine clefts located in the Sonnblick region of the eastern Tauern Window, Austria, are oriented perpendicular to the .... Oblique aerial view east-southeastward across the head of Oil Bay. Strata exposed along the shoreline and uplands near Oil Bay.. Perach Nuriel1, Jörn-Frederik Wotzlaw2, Maria Ovtcharova3, Anton Vaks1, Ciprian Stremtan4, Martin Šala5,. Nick M. W. Roberts6, .... The U-Pb detrital zircon geochronologic records from the Paraná Basin of South America, which was located downstream of the Kalahari Basin in ... 900d8beed2