Results 71 to 80 of about 2,000 (199)

The Provenance of Silver in the Viking‐Age Hoard From Bedale, North Yorkshire

Archaeometry, EarlyView.
ABSTRACT The acquisition of silver was a key motive propelling the Viking expansion out of Scandinavia; identifying the sources of Viking silver during the early part of the Viking Age can provide critical insights into the relative significance of western European and eastern, Islamic wealth in the Viking expansion.
Jane Kershaw, Stephen Merkel, Andrew Woods, Jane Evans, Vanessa Pashley, Simon Chenery   +5 more
wiley   +1 more source

EXPECTED OCCURRENCE OF THE BLIND ORE BODIES AT THE LOWER LEVELS OF THE BALEI DEPOSIT AND A MECHANISM OF THE RICH ORES FORMATION AT THE NEAR-SURFACE GOLD-SILVER ORE DEPOSITS

Известия высших учебных заведений: Геология и разведка, 2017
The gold ore chimneys of 2 types have been shown to be developed at the near-surface deposits of gold and silver ores. These types are: 1 - bulk ones, of the vein-nested-veinlet ore bodies of stockwork shapes and 2 - small pay streaks of the ore bodies ...
E. M. Nekrasov
doaj   +1 more source

«PIONEER» GOLD ORE DEPOSIT: HISTORY OF DISCOVERY, GEOLOGICAL STRUCTURE AND ORE COMPOSITION

Messenger AmSU, 2020
Brief information about the history of the discovery of the large Pioner gold deposit in the Amur province is given. The main features of the geological structure of the deposit, located at the contact of the multiphase granitoid intrusion of the Early Cretaceous age and terrigenous rocks of the Middle-Late Jurassic, are shown.
openaire   +1 more source

An Archaeometallurgical Investigation on Some Archaeological Metal Finds From the Sasanian Site of Jahāngir, Western Iran

Archaeometry, EarlyView.
ABSTRACT Twelve metal artifacts from recent excavations at the Sasanian archaeological site of Jahāngir in western Iran have been analyzed. These items include both decorative and utilitarian artifacts. The samples were examined using micro‐X‐ray fluorescence (μ‐XRF), scanning electron microscopy with energy‐dispersive X‐ray spectroscopy (SEM‐EDS), and
Omid Oudbashi, Leila Khosravi, Morteza Habibzadeh   +2 more
wiley   +1 more source

On the prospects of identifying magmatogene-hydrothermal iron-ore deposits in the Ukrainian Shield

Геофизический журнал, 2015
According to the analysis of literary materials and author's own observations in different regions of the world, a specific set of iron-ore and related deposits, won the international title of "hydrothermal iron-oxide-gold-copper deposits” (IOCG ...
A. Yushin
doaj   +1 more source

Gold composition and conditions of Southern Ak-Dag gold-sulfide-quartz ore occurrence formation (Western Tuva)

Литосфера, 2020
Research subject. The paper presents data on the mineralogical, geochemical and fluid inclusion features of the Southern Ak-Dag gold-sulphide-quartz ore occurrence in Western Tuva.Methods.
N. N. Ankusheva, R. V. Kuzhuget
doaj   +1 more source

Six Ca‐Mg‐Fe Carbonate Reference Materials for In Situ Measurement of Oxygen and Carbon Isotope Ratios

Geostandards and Geoanalytical Research, EarlyView.
Key Points Six new Ca‐Mg‐Fe carbonate reference materials are available to the global geochemical community for calibrating oxygen and carbon isotope ratios by SIMS. Significant compositional matrix effects were observed in the dolomite‐ankerite and magnesite‐siderite series during SIMS analysis. Compositional matrix effects correlate with Fe variation.
Maria Rosa Scicchitano, Chris Harris, Julie Luyt, Andreas Pack, Tommaso di Rocco, Torsten Vennemann, Franziska D.H. Wilke, Anja M. Schleicher, Johannes Glodny, Kimberly T. Tait, Simon Philippo   +10 more
wiley   +1 more source

New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 more
wiley   +1 more source

Research on weak information extraction methods in the exploration of hidden Carlin-type gold deposits in southwestern Guizhou, China

Dizhi lixue xuebao
Objective  The southwestern Guizhou region is a concentrated distribution area of Carlin-type gold deposits in China, with superior geological conditions for gold mineralization and enormous potential for mineral exploration.
TAN Lijin, LIU Jianzhong, TAN Qinping, LI Songtao, SONG Weifang, LI Junhai, WANG Zepeng, XU Liangyi, ZHANG Bingqiang, LIU Ping, MENG Minghua   +10 more
doaj   +1 more source

Magmatism and ore deposits of Murzinskoe gold ore field (Gorny Altai)

Известия Томского политехнического университета: Инжиниринг георесурсов, 2017
The relevance of the discussed issue is caused by the need of researching petrology, geochemistry and ore mineralization of Murzinskoe ore field of Gorny Altai. Different types of copper and gold mineralization at early stage are related in space and paragenetically to granitoids of Murzinsky stock.
Anatoliy Ivanovich Gusev, Evgeniya Mikhailovna Tabakaeva   +1 more
openaire   +2 more sources