The Canadian Hydrographic Association’s Post

Removal of non-original gold and dirt using laser ablation. IRLaser #conservation #restoration #monumentshistoriques #nettoyageaulaser #laser #laserablation #monuments

Hole MTRC038 goes even better than last weeks hole MTRC032 with 199m at 0.31% Ni, including three high grade zones up to 3.16% Ni and 1.20% Cu. #ASX #nickel #criticalmetals #exploration #mulgamonster

Wishing everyone a fantastic New Year! May the new year bring us exciting discoveries, smooth sailing, and the fulfillment of our hydrography aspirations. "No day too long, no task too arduous." #mynha #hydrography #hydrographicsurvey #bathymetry #blueocean #hydrospatial #marinesurvey #marinespatial #offshoresurvey

Delaunay triangulations (DT) are dual of Voronoi diagrams of sites: satisfy the empty sphere property that each circumscribing sphere to a triangle (or simplex in d dim) is empty of other sites Bregman DT satisfies the Bregman empty sphere property 👉 https://lnkd.in/g9TtqS-W

The recent paper by A.Taleb et.al. from Università degli Studi di Bari in #cooperation with CNR IFN, #Italy presents an innovative approach to real-time analysis of fine ash in volcanic plumes using laser-induced breakdown spectroscopy (#LIBS). The use of self-calibrated LIBS for elemental #analysis offers valuable insights for #volcano monitoring and hazard assessment. Main advantage is that the analysis does not need sample preparation or calibration standards. The results obtained demonstrate the potential for accurate elemental fraction measurements in extreme environments. The method shows also good agreement with literature compositions further supporting its potential for accurate elemental fraction measurements. As an integral part of the LIBS setup our LTB Aryelle 200 played an important role as it offered the scientist a broad spectral range while also maintaining high spectral resolution. For more information on the scientific findings, please see: https://lnkd.in/eRPHks53 Additionally, for more details on the LIBS setup and Aryelle 200 spectrometer, please visit our website  https://lnkd.in/e2GUSpQS . Alternatively, you can always contact us directly.    #laser #spectroscopy #Bari #calibration free, #spectrometer made in #Berlin #Adlershof

*New paper* published in Tectonics. "The geodynamic significance of continental UHP exhumation: New constraints from the Tso Morari Complex, NW Himalaya" In this paper we examine the petrological and geochronological record in ultrahigh-pressure (UHP) eclogites and felsic gneiss. We present a new and precise zircon age of 46.91 ± 0.07 Ma which dates exhumation from UHP conditions. Overlapping ages from other UHP rocks in the NW Himalaya imply a coeval time-frame for the onset of UHP exhumation. Furthermore, our regional synthesis demonstrates a causative link between changes in the subduction dynamics of the India-Asia collision zone at 47-46 Ma and the resulting mid-Eocene plate network reorganization. The onset of UHP exhumation therefore provides a tightly constrained time-stamp significant geodynamic shifts within the orogen and wider plate network. Article DOI: https://lnkd.in/e6FFCm-X Access the preprint here: 10.22541/essoar.170965042.27714389/v1

First batch of samples ready for scanning electron petrography and in situ Rb-Sr dating. 7 out of these samples are granites and yet they look quite different. #HorizonEurope #CRITTER #Thermochronology #EnergyTransition #CriticalRawMaterials

New paper out on the application of anisotropy of magnetic susceptibility and two-dimensional exposures of TXB in palaeocurrent analysis!

Elac çift frekanslı sonar sistemi ile batimetrik harita . . bathymetric map with elac dual frequency sonar system #bathymetry #engineer #mapping #gnss #harita #haritalama

💫 Magnetic Susceptibility Reveals Differential Retrogression in Meta-Mafic Enclave Consistent with Metamorphic P–T Estimation and Petrography 🖊️ In this study, analyzing a partially retrogressed mafic enclave within Archean TTG gneiss from the Jiaobei Terrane, North China craton, we incorporate magnetic susceptibility with conventional metamorphic (petrographic and major element) proxies in order to investigate profiles of metamorphic retrogression.  #Retrograde_metamorphism #Retrogression #Magnetic_susceptibility #Mafic_enclave #Thermomagnetic_susceptibility 🔗 DOI: https://lnkd.in/g5wUwdx8 ✉ Email: eps@nassg.org 👩💼 Managing Editor: Ms. Tracy Jin