Results 191 to 200 of about 3,385 (255)

The exploitation of silver deposits in early medieval Europe: some documentary, economic and social problems

Archaeometry, EarlyView.
Abstract Focusing on Southern Europe, this article sheds light on the mining landscape of the early Middle Ages. Based on the current state of historical and archaeological knowledge, the article raises a number of questions that can be extended to other European regions.
Nicolas Minvielle Larousse
wiley   +1 more source

Formation of giant carbonatite rare earth deposits controlled by deep-seated magma chambers. [PDF]

Nat Commun
Xue S, Yang W, Niu H, He H, Zhu J, Liang X, Sun W, Ling MX, Ding X, Zhang W.   +9 more
europepmc   +1 more source

Quality from Kent: Preliminary results from the analysis of fifth‐ to seventh‐century silver alloys

Archaeometry, EarlyView.
Abstract This paper explores early results from the chemical and lead isotope analysis of 30 silver‐alloy objects from southeast England dating between the fifth and seventh centuries CE, presenting limited aspects of the three main analyses that were conducted. First, a comparison of the results gained from surface x‐ray fluorescence (pXRF) values and
Toby F. Martin, Matthew J. Ponting
wiley   +1 more source

Reply to: Reassessing gas generation from oil thermal cracking associated with the Emeishan Large Igneous Province. [PDF]

Nat Commun
Chen C, Qin S, Wang Y, Holland G, Wynn P, Zhong W, Zhou Z.   +6 more
europepmc   +1 more source

Soil wetting and drying processes influence stone artefact distribution in clay‐rich soils: A case study from Middle Gidley Island in Murujuga, northwest Western Australia

Archaeometry, EarlyView.
Abstract Soils that contain swelling clay minerals (e.g., montmorillonite) expand and contract during wetting and drying, causing movement within the soil profile. This process, known as argilliturbation, can alter artefact distributions, destroy stratigraphy and complicate the interpretation of archaeological deposits.
Caroline Mather, Matthias Leopold, Kaitlin Sullivan, Kane Ditchfield, Tom Horrocks, Luke Gliganic, Emma Beckett, Diana Patalwala, Emielda Yusiharni, Michael Smirk, William Hiscock, Jo McDonald   +11 more
wiley   +1 more source

Climatic imprint on interfacially controlled platinum-palladium resources. [PDF]

PNAS Nexus
Wright EG, Wang I, Fang Y, Flynn ED, Catalano JG.   +4 more
europepmc   +1 more source

Geochemical Characteristics of Meso-Neoproterozoic-Cambrian Potential Shale Source Rocks and Oil Source Correlation for Paleo-Reservoirs in the Cambrian Formations of the Zhongtiaoshan Area in Southern East of the Ordos Basin. [PDF]

ACS Omega
Liu H, Li C, Feng S, Ma G, Chen X, Huang X.   +5 more
europepmc   +1 more source

Unlocking shale gas potential in the Sembar Formation through multi-analytical assessment and basin modeling, Central Indus Basin, Pakistan. [PDF]

Sci Rep
Ahmed A, Khan T, Mustapha KA, Jahandad S, Radwan AE, Khan MA.   +5 more
europepmc   +1 more source

Ancient storage of anomalous mercury isotope signatures in the Earth's transition zone. [PDF]

Nat Commun
Xu R, Yin R, White WM, Bizimis M, Cai Y, Zhang J, Chen C, Tian Z, Ruan T, Li Y, Zhang G, Liu L, Bai Z, Zhou M, Liu Y.   +14 more
europepmc   +1 more source

Ensemble machine learning strategies for mineral prospectivity mapping under data scarcity. [PDF]

Sci Rep
Amirajlo P, Hassani H, Pour AB, Habibkhah N.   +3 more
europepmc   +1 more source