Results 41 to 50 of about 14,846 (227)
A study of the morphology, composition and mineral associations of Fe-Ni sulphides in CM carbonaceous chondrites [PDF]
, 2004 A study of the compositional and textural variations between Fe-Ni sulphides in a suite of pristine to extensively aqueously altered CM chondrites, using SEM and EMP ...
Bullock, E. S. +3 more
core
THE ESTIMATION OF PYRRHOTITE IN PYRITES ORES. [PDF]
Journal of the American Chemical Society, 1896 n ...
openaire +1 more source
Terra Nova, EarlyView.ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen +3 more
wiley +1 more source
Nanoscale Infrared Imaging Analysis of Carbonaceous Chondrites to Understand Organic-Mineral Interactions During Aqueous Alteration [PDF]
, 2019 Organic matter in carbonaceous chondrites is distributed in fine-grained matrix. To understand pre- and postaccretion history of organic matter and its association with surrounding minerals, microscopic techniques are mandatory.
Baden, Naoki +6 more
core +2 more sources
Magnetic Phase Relations of Pyrrhotite
Journal of geomagnetism and geoelectricity, 1972 A series of iron sulphide compositions containing between 50 and 46.0 atomic percent iron has been synthesized and the products of the syntheses annealed at 701, 350, 300 and 144°C. The charges were examined in polished sections by X-ray powder photography, electron microprobe analysis and Mossbauer spectroscopy, and the thermomagnetic properties were ...
Schwarz, E. J., Vaughan, D. J.
openaire +3 more sources
Strumble-Preseli ancient communities and environment study (SPACES); Sixth report 2007-08 [PDF]
, 2009 This paper reports the results of field surveys and geophysical surveys in the eastern Preseli Hills of Pembrokeshire, Wales, together with petrological descriptions of rock samples taken from key outcrops and quarry ...
Armstrong, Kayt +3 more
core
The anomalous demagnetization of pyrrhotite [PDF]
Geophysical Journal International, 1990 SUMMARY The anomalous behaviour of pyrrhotite-bearing rocks from the Pennine Orefield, northern England on alternating field demagnetization is studied with particular reference to rotational remanent magnetization (RRM). Using a heat treated sample, it is demonstrated that a two-axis tumbling demagnetizer is capable of producing a repeatable RRM ...
openaire +1 more source
Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.Abstract Self‐reversed magnetization, acquired antiparallel to the external field, can complicate the interpretation of paleomagnetic directional records, particularly in altered greigite‐bearing sediments with anomalous magnetizations. The underlying physical process for this self‐reversal remains poorly constrained.
Shichu Chen, Liao Chang, Wyn Williams
wiley +1 more source
Application of In-situ Micro-XRF Spectrometry in the Identification of Copper Minerals
Yankuang ceshi, 2015 There are many types of copper minerals with different occurrences and complex compositions. The paragenesis and associated minerals make it difficult to traditionally identify the rock and mineral.
LIANG Shu-ting +4 more
doaj +1 more source
Assessing microstructures of pyrrhotites in basalts by multifractal analysis [PDF]
Nonlinear Processes in Geophysics, 2010 Understanding and describing spatial arrangements of mineral particles and determining the mineral distribution structure are important to model the rock-forming process.
S. Xie, Q. Cheng, S. Zhang, K. Huang
doaj +1 more source