79 research outputs found
Noble gases fingerprint a metasedimentary fluid source in the Macraes orogenic gold deposit, New Zealand
No full textThe world-class Macraes orogenic gold deposit (∼10 Moz resource) formed during the late metamorphic uplift of a metasedimentary schist belt in southern New Zealand. Mineralising fluids, metals and metalloids were derived from within the metasedimentary host. Helium and argon extracted from fluid inclusions in sulphide mineral grains (three crush extractions from one sample) have crustal signatures, with no evidence for mantle input (R/Ra = 0.03). Xenon extracted from mineralised quartz samples provides evidence for extensive interaction between fluid and maturing organic material within the metasedimentary host rocks, with 132Xe/36Ar ratios up to 200 times greater than air. Similarly, I/Cl ratios for fluids extracted from mineralised quartz are similar to those of brines from marine sediments that have interacted with organic matter and are ten times higher than typical magmatic/mantle fluids. The Macraes mineralising fluids were compositionally variable, reflecting either mixing of two different crustal fluids in the metasedimentary pile or a single fluid type that has had varying degrees of interaction with the host metasediments. Evidence for additional input of meteoric water is equivocal, but minor meteoric incursion cannot be discounted. The Macraes deposit formed in a metasedimentary belt without associated coeval magmatism, and therefore represents a purely crustal metamorphogenic end member in a spectrum of orogenic hydrothermal processes that can include magmatic and/or mantle fluid input elsewhere in the world. There is no evidence for involvement of minor intercalated metabasic rocks in the Macraes mineralising system. Hydrothermal fluids that formed other, smaller, orogenic deposits in the same metamorphic belt have less pronounced noble gas and halogen evidence for crustal fluid-rock interaction than at Macraes, but these deposits also formed from broadly similar metamorphogenic processes
Novius koebelei Olliff in Craw 1892
No full text<i>Novius koebelei</i> Olliff in Craw <p>(Figs 19–24, 48–59, 64, 76–80, 90, 96–99)</p> <p> <i>Novius Koebelei</i> Olliff in Craw, 1892: 14. TL: Australia, introduced to U.S.A.; Coquillett, 1893: 20; Lea, 1902: 493.</p> <p> <i>Rodolia koebelei</i>: Korschefsky, 1931: 101; Gordon, 1972: 26; Ślipiński, 2007: 143.</p> <p> <i>Novius limbatus</i> Blackburn, 1895: 254. TL: Queensland, near Cairns. <b>Syn. nov.</b></p> <p> <i>Rodolia limbata</i>: Ślipiński, 2007: 143.</p> <p> <i>Rodolia blackburni</i> Ukrainsky, 2009: 285 (replacement name for <i>Novius limbata</i> Blackburn, 1895, not Motschulsky, 1866).</p> <p> <i>Novius tridens</i> Lea, 1902: 492. TL: Queensland, near Cairns. <b>Syn. nov.</b></p> <p> <i>Rodolia tridens</i>: Ślipiński, 2007: 143.</p> <p> <i>Novius simplicipennis</i> Blackburn, 1895: 253. TL: Queensland, Toowoomba. <b>Syn. nov.</b></p> <p> <i>Rodolia simplicipennis</i>: Ślipiński, 2007: 143.</p> <p> <i>Novius discoidalis</i> Blackburn, 1895: 253. TL: Queensland, near Toowoomba. <b>Syn. nov.</b></p> <p> <i>Rodolia discoidalis</i>: Ślipiński, 2007: 143.</p> <p> <i>Novius tripustulatus</i> Blackburn, 1895: 254. TL: Queensland, near Cairns. <b>Syn. nov.</b></p> <p> <i>Rodolia tripustulata</i>: Ślipiński, 2007: 143.</p> <p> <i>Novius ruber</i> Blackburn, 1889a: 148. TL: New South Wales, Mulwala. <b>Syn. nov.</b></p> <p> <i>Rodolia rubra</i>: Ślipiński, 2007: 143.</p> <p> <b> <i>Diagnosis</i>.</b> <i>Novius koebelei</i> can only be diagnosed by the details of the male genitalia, in particular by the presence of the small apical barb at the apex of the penis guide.</p> <p> <b> <i>Description</i>.</b> Length 2.7–3.5 mm. Body oval, widest near middle, 1.2–1.3 times longer than wide. Color pattern variable. Head, pronotum and scutellum usually uniformly dark. Elytra of typical form orange or red often with darker sutural stripe posteriorly and small lateral dark spot near midlength of elytron situated near lateral margin and continuing as darker stripe along lateral margin posteriorly. Melanic forms have elytra with black areas of various sizes or, rarely entirely black (Figs 48–59, 64, 76–80, 90). Interocular distance in frontal view 1.6–2.0 times eye width. Male genitalia (Figs 19–23, 108–111): parameres slender, not expanded apically; penis guide slightly longer than parameres, stout and narrowing apically with small apical barb. Penis bent and pointed apically. Female genitalia as in Figs 96–98.</p> <p> <b> <i>Type material</i>.</b> <i>Novius Koebelei</i> Olliff in Craw: Lectotype, here designated, the specimen illustrated in Craw, 1892: frontispiece, plate 1, fig 3, “ <i>Novius Koebelei</i>, Olliff.: male enlarged.”; <i>Novius limbatus</i> Blackburn: Lectotype, here designated (BMNH), “ Australia Blackburn Coll. B.M. 1910-236/ <i>Novius limbatus</i> Blackb. / T 5938, Qu.”; <i>Novius tridens</i> Lea: Holotype male: “10408 <i>Novius tridens</i> Lea, N.S. Wales, TYPE, S.A. Museum”; <i>Novius simplicipennis</i> Blackburn: Lectotype, here designated (BMNH), “ Australia Blackburn Coll. B.M. 1910-236/ <i>Novius simplicipennis</i> Blackb. / T 4164, Qu”; <i>Novius discoidalis</i> Blackburn: Lectotype male, here designated (BMNH), “ Australia Blackburn Coll. B.M. 1910-236/ <i>Novius discoidalis</i> Blackb. / T 5936, Qu.”; <i>Novius tripustulatus</i> Blackburn: Lectotype female, here designated (BMNH), “ Australia Blackburn Coll. B.M. 1910-236/ <i>Novius tripustulatus</i> Blackb. / T 5937, Qu.”; <i>Novius ruber</i> Blackburn: Lectotype female, here designated (BMNH), Blackburn: “ Australia Blackburn Coll. B.M. 1910- 236/ <i>Novius ruber</i> Blackb. / T 2963.”</p> <p> <b> <i>Other specimens examined</i>. New South Wales</b> : Sydney, R.C.L. Perkins, 1942-95 (4, BMNH); Exp.937, 8.9.59, Frank Wilson, Sydney, viii.1959, C.I.E. Coll. No. 16712, ANIC (5, ANIC). <b>Queensland:</b> Tambourine Mts, 11-17.v.1935 <b>(</b> 2, BMNH); Brisbane, 28.28S 153.01E, ix.1992, V. Brancatini (2, BMNH); MUS. VIC. ENT-1041, Goodna, x.1920, F.E. Wilson (1, VM); 19km S of Bundaberg, Pine Ck, 9.v.1975, H. Frauca, (1, VM); Rockhampton, 10-11.iii.1965, Exp. Dr. J. Balogh, (1, ANIC); Caloundra, iv.1965, L. Simpson, captured on <i>Acelypha</i> sp. (4, ANIC); Brisbane, 27.28S 153.01E, viii.1992, V. Brancatini, (LPL9521) Pred. of <i>Icerya seychellarum</i> on <i>Livistona chinensis</i> (1, ANIC); Kenmore, 27.30.7S 152.56.2E, 9.xi.1993, V. Brancatini, <i>Rodolia koebelei</i> ? LPL9532 (KE15), predator of <i>Icerya aegyptiaca</i> on decoy <i>Ficus benjamina,</i> (12, ANIC); Brisbane, 27.28S 153.01E, 28.v.1992, V. Brancatini, <i>Rodolia</i> sp? (LPL9521), Pred. of <i>Icerya seychellarum</i> on <i>Livistona chinensis,</i> (4, ANIC); Long Pocket, 27.30.6S 152.59.7E, v.1993, V. Brancatini, <i>Rodolia koebelei</i> ? LPL9532 (LP108), predator of <i>Icerya aegyptiaca</i> on decoy <i>Ficus benjamina</i>, (9, ANIC); Indooroopilly, 27.30.0S 152.58.4E, 7.x.1994, O. Fahey & V. Branvatini, <i>Rodolia koebelei</i> ? LPL9533 (IP24), predator of <i>Icerya aegyptiaca</i> on decoy <i>Ficus benjamina</i> (6, ANIC); Indooroopilly, 27.30.0S 152.58.4E, 1.vi.1994, V. Bran +catini & O. Fahey, <i>Rodolia koebelei</i> ? LPL9533 (IP31), predator of <i>Icerya aegyptiaca</i> on <i>Livistona chinensis,</i> (8, ANIC); Indooroopilly, 27.30.0S 152.58.4E, 30.viii.1994, V. Branvatini, <i>Rodolia koebelei</i> ? LPL 9533 (IP22), predator of <i>Icerya aegyptiaca</i> on <i>Livistona chinensis</i> (5, ANIC); Kenmore, 27.37.3S 152.56.0E, ix.1994, V. Brancatini, <i>Rodolia koebelei,</i> predator of <i>Icerya seychellarum</i> on <i>Michelia figo</i> (1, ANIC). <b>Northern Territory:</b> Darwin NT, 12.27S 130.50E, x.1992, V. Brancatini (18, BMNH); Darwin NT, 19.iv.1991, V. Brancatini (8, BMNH); Berrimah, Darwin, 16.iv.1991, V. Brancatini (2, BMNH); Alawa, Darwin, 22.iv.1991, V. Brancatini (6, BMNH); Darwin, 19.iv.1991, V. Brancatini, <i>Rodolia</i> sp. (LPL9507), ex <i>Icerya aegyptiaca</i> on <i>Nandina domestica</i>, Brit. Mus. (M.H.), 1993-94 (6, BMNH); 12.46S 132.39E, 12km NNW of Mt. Cahill, 25.x.1972, at light, E. Britton (1, ANIC); Darwin, 12.27S 130.50E, x.1992, V. Brancatini, <i>Rodolia</i> sp. (LPL9507), Lab. Cult. Reared on <i>Icerya aegyptiaca</i> on <i>Ficus benjamina</i> (4, ANIC); Darwin, 12.27S 130.55E, x./ xi. 1993, V. Brancatini, LPL 9507, Laboratory culture reared on <i>Icerya aegyptiaca</i> on <i>Ficus benjamina</i> (45, ANIC).</p> <p> <b> <i>Distribution</i>.</b> Australia (Fig. 24), introduced to the United States (California) and subsequently to many countries worldwide.</p> <p> <b> <i>Remarks</i>.</b> <i>Novius koebelei</i> has been described or mentioned many times in the literature, usually with reference to Olliff (1895) who was originally cited as the author of this species. Coquillett (1893) had previously described the larval and egg stages of this species, and was subsequently cited as the author by Gordon (1972, 1985). Gordon (1972) designated a fourth instar larva as the neotype of <i>Novius koebelei</i> Coquillett but this action is invalid (based on an individual that is insufficient to ensure recognition), and unnecessary because the first description of this species appeared in 1892 in the report by A. Craw who illustrated the adult and larvae accompanied by the name <i>Novius Koebelei</i>, Olliff. According to the ICZN Art 74.4, we here designate the specimen illustrated in fig. 3 of that paper as the lectotype of <i>Novius koebelei</i> Olliff in Craw (1892).</p>Published as part of <i>Pang, Hong, Tang, Xue-Fei, Booth, Roger G., Vandenberg, Natalia, Forrester, Juanita, Mchugh, Joseph & Ślipiński, Adam, 2020, Revision Of The Australian Coccinellidae (Coleoptera). Genus Novius Mulsant Of Tribe Noviini, pp. 1-24 in Annales Zoologici 70 (1)</i> on pages 8-11, DOI: 10.3161/00034541ANZ2020.70.1.001, <a href="http://zenodo.org/record/3776582">http://zenodo.org/record/3776582</a>
Transformation of graphite by tectonic and hydrothermal processes in an active plate boundary fault zone, Alpine Fault, New Zealand
No full textGraphite is a material with one of the lowest frictional strengths, with coefficient of friction of 0.1 and thus in natural fault zones it may act as a natural solid lubricant. Graphitization, or the transformation of organic matter (carbonaceous material, or CM) into crystalline graphite, is induced by compositional and structural changes during diagenesis and metamorphism. The supposed irreversible nature of this process has allowed the degree of graphite crystallinity to be calibrated as an indicator of the peak temperatures reached during progressive metamorphism. We examine processes of graphite emplacement and deformation in the Alpine Fault Zone, New Zealand's active continental tectonic plate boundary. Raman spectrometry indicates that graphite in the distal, amphibolite-facies Alpine Schist, which experienced peak metamorphic temperatures up to 640 ◦C, is highly crystalline and occurs mainly along grain boundaries within quartzo-feldspathic domains. The subsequent mylonitisation in the Alpine Fault Zone resulted in progressive reworking of CM under lower temperature conditions (500◦C-600◦C) in a structurally controlled environment, resulting in spatial clustering in lower-strain protomylonites, and further foliation-alignment in higher-strain mylonites. Subsequent brittle deformation of the mylonitised schists resulted in cataclasites that contain over three-fold increase in the abundance of graphite than mylonites. Furthermore, cataclasites contain graphite with two different habits: highly-crystalline, foliated forms that are inherited mylonitic graphite; and lower-crystallinity, less mature patches of finer-grained graphite. The observed graphite enrichment and the occurrence of poorly-organised graphite in the Alpine Fault cataclasites could result from: i) hydrothermal precipitation from carbon-supersaturated fluids; and/or ii) mechanical degradation by structural disordering of mylonitic graphite combined with strain-induced graphite localisation. The lack of published systematic studies of mechanical modification of the structure of graphite inhibits further conclusion to be drawn. Thus, we performed laboratory deformation experiments during which we sheared highly crystalline graphite powder at room temperature, normal stresses of 5 MPa and 25 MPa and sliding velocities of 1 μm/s, 10 μm/s and 100 μm/s. The degree of graphite crystallinity, both in the starting and resulting materials, was analysed by Raman microspectroscopy. Our results demonstrate consistent decrease of graphite crystallinity with increasing shear strain. We conclude that: i) graphite 'thermometers' are unreliable in brittely deformed rocks; ii) a shear strain calibration of graphite 'thermometers' is needed; iii) fault creep is very likely responsible for the observed structural and textural characteristics of graphite in the Alpine Fault cataclasites. Finally, to investigate the possibility of hydrothermal origin for at least some of the graphite in the Alpine Fault cataclasites we will also present synchrotron FTIR and carbon isotope analysis of the Alpine fault rocks
Eastern Fables
No full textSix fables from the Panchatantra, each with an illustration. The Gardener and the Bear and The Crane and the Craw-Fish are familiar to me. Good examples of the Panchatantra's more rambling style.This is a hardbound book (hard cover)#24 of 250F.E.I
Mechanical and microstructural data from deformation experiments on marine and meteoric ice from the Amery Ice Shelf
No full textProgress Code: completedStatement: Experiment LC020 is missing a large amount of displacement data due to a malfunctioning dial gauge. Grain sizes from all meteoric ice samples are unreliable, as they are very large relative to the sample/section size. Strain rate data from meteoric ice samples are likely controlled by a small number of grains, for the same reason.<b>Purpose</b><br/>This dataset was collected as part of a project to quantify the rheology of marine ice in comparison with other ice types.These data were collected from compressional ice deformation experiments on samples of standard (laboratory-made) ice, and marine and meteoric ice from the Amery Ice Shelf, cores AM01, AM04 and G1. Experiments were performed in the IMAS Ice Mechanics Laboratory between 2018 and 2022, following the methods described in:<br/><br/>Craw, L., Treverrow, A., Fan, S., Peternell, M., Cook, S., McCormack, F., and Roberts, J.: The temperature change shortcut: effects of mid-experiment temp<br/>erature changes on the deformation of polycrystalline ice, The Cryosphere, 15, 2235–2250, https://doi.org/10.5194/tc-15-2235-2021, 2021.<br/><br/>all_experiments.csv contains a list of all experiments performed, and the following fields:<br/>temperature = target temperature of the experiment, in degrees (actual temperature is recorded in the data files for each experiment)<br/>ice_type = string denoting standard, marine or meteoric ice<br/>starting_point = the index of the data point in the raw data file where the experiment begins (i.e. load was applied to the sample)<br/>end_point = the index of the data point in the raw data file where the experiment ends<br/>secondary_rate = secondary minimum strain rate, picked manually from the curve<br/>secondary_strain = the total strain at the secondary minimum<br/>tertiary_rate_1 = first tertiary strain rate, picked manually from the curve<br/>tertiary_strain_1 = the total strain at the first tertiary creep stage<br/>tertiary_rate_2 = second tertiary strain rate, picked manually from the curve (this value only exists in experiments with more than one temperature point)<br/>tertiary_strain_2 = the total strain at the second tertiary creep stage<br/>max_axial_strain = the maximum (final) axial strain reached<br/>max_octahedral_strain = the maximum (final) octahedral strain reached<br/>total_time_hours = total experiment run-time in hours<br/>total_time_days = total experiment run-time in days<br/>undeformed_median_grain_size = median grain size measured in a thin section before the experiment (this was not always recorded)<br/>undeformed_number_of_grains = the number of grains in the section used to calculate the median grain size (for quality control purposes)<br/>deformed_median_grain_size = median grain size measured in a thin section after the experiment (this was not always recorded)<br/>deformed_number_of_grains = the number of grains in the section used to calculate the median grain size (for quality control purposes)<br/>undeformed_jindex = J-index describing the density of c-axis alignment measured in a thin section taken before the experiment (1 denotes random distribution, an infinite value denotes a single orientation)<br/>deformed_jindex = J-index describing the density of c-axis alignment measured in a thin section taken after the experiment (1 denotes random distribution, an infinite value denotes a single orientation)<br/><br/>For each experiment listed in all_experiments.csv, a raw mechanical data file and a processed mechanical data file are supplied, alongside .mat files containing fabric analyser and EBSD data (where collected) from thin sections.<br/><br/>[experiment_number]_raw_data.csv contains the data as logged during the experiment:<br/>time = time in hours<br/>v_dis = vertical diplacement of the top platen (at the top of the sample) relative to its original position<br/>h_dis = not recorded in these experiments<br/>temp = temperature in degrees celsius<br/><br/>[experiment_number]_smoothed.csv contains the processed data used to plot strain rate vs. strain curves:<br/>smoothed_mean_time = the mean time in hours corresponding to the strain rate data<br/>smoothed_axial_strain = the total axial strain calculated over intervals of 250 data points<br/>smoothed_axial_strain_rate = the axial strain rate calculated over intervals of 250 data points<br/>smoothed_octahedral_strain = the total octahedral strain calculated over intervals of 250 data points<br/>smoothed_octahedral_strain_rate = the octahedral strain rate calculated over intervals of 250 data points<br/><br/>[experiment_number]_FA_smoothed.mat contains fabric analyser data (spatially indexed Euler orientations) formatted to be read by the MTEX toolbox (https://mtex-toolbox.github.io/). These were converted from the original .cis data format using methods outlined in Craw et al., 2021 (reference above). <br/><br/>[experiment_number]_ebsd_smoothed.mat contains EBSD data (spatially indexed Euler orientations) formatted to be read by the MTEX toolbox (https://mtex-toolbox.github.io/). These data have been smoothed using a half quadratic filter.<br/><br/>Please direct any questions to [email protected]
Orbifold Quot schemes via the Le Bruyn-Procesi theorem
No full textThis note provides a short proof of the fact that the reduced scheme underlying each orbifold Quot scheme associated to a finite subgroup of SL(2,C) is isomorphic to a Nakajima quiver variety. Our approach uses recent work of the author with Yamagishi, allowing us to bypass the combinatorial arguments and the use of recollement from the original paper with Gammelgaard, Gyenge and Szendroi.5 pages. This is an expanded version of a short article submitted to Proceedings of the ZAG semina
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A Historical and Stylistic Analysis of the Sonata, Op. 31, No. 2 in D Minor of Beethoven
No full textThe purpose of this paper is to give a historical and stylistic analysis of the Sonata, Op.31, No.2 in D minor of Beethoven. The historical background of Beethoven, the time period the sonata was written, and the influence that the piano of the time had on the sonata is first discussed. The author then discusses the general aspects of Beethoven's style followed by a detailed analysis of the sonata
J Acquir Immune Defic Syndr
No full textBackground:People living with HIV are prescribed opioids more often and at higher doses than people who do not have HIV, and disproportionately experience risk factors for substance use disorder, which suggests they could be at increased risk of the misuse of opioids. Researchers also suggest that opioid misuse negatively affects various HIV clinical outcomes, increasing the risk of transmission to partners with an HIV-negative status.Methods:We calculated weighted percentages and 95% confidence intervals to estimate substance use characteristics among a probability sample of 28,162 HIV-positive adults receiving medical care in the United States who misused opioids (n = 975). Then, we used Rao-Scott \u3c72 tests to assess bivariate associations between opioid misuse and selected characteristics.Results:In all, 3.3% misused opioids. Misuse was more common among young adults, males, and non-Hispanic whites. Persons who misused opioids were less likely to: have been prescribed antiretroviral therapy (ART) (88.7%), report being adherent to ART medications in the past 3 days (78.1%), and have durable viral suppression (54.3%) than persons who did not misuse opioids (92.5%, 87.7%, and 64.7%, respectively). Persons who misused opioids were more likely to report condomless sex with partners of negative or unknown HIV status while not durably virally suppressed (11.7% vs 3.4%) than persons who did not misuse opioids.Conclusions:Opioid misuse among adults receiving HIV medical care is associated with inadequate ART adherence, insufficient durable viral suppression, and higher risk of HIV transmission to sexual partners.20192020-02-01T00:00:00ZCC999999/ImCDC/Intramural CDC HHS/United States30383590PMC63577761060
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