Now showing items 151-160 of 192
Sulfidation of organic matter associated with gold mineralization, Pueblo viejo, Dominican republic
(Elsevier, 1990)
The Pueblo Viejo district is one of the largest producers of precious metals in the world, yielding more than 11,000 kg of Au annually. Gold mineralization at Pueblo Viejo is hosted in spilite, and coarse clastic and finely ...
Correlation by Rb-Sr geochronology of garnet growth histories from different structural levels within the Tauern Window, Eastern Alps
(Springer-Verlag, 1994-03)
In order to evaluate rates of tectonometamorphic processes, growth rates of garnets from metamorphic rocks of the Tauern Window, Eastern Alps were measured using Rb-Sr isotopes. The garnet growth rates were determined from ...
The rare earth element geochemistry of hydrothermal sediments from the East Pacific Rise: Examination of a seawater scavenging mechanism
(Elsevier, 1986-03)
The sediments recovered during DSDP Leg 92 (Site 598) include a complete 16 m.y. record of hydrothermal sedimentation along the western flank of the East Pacific Rise at 19[deg]S. Fifty samples from this sediment column ...
The occurrence of högbomite in high-grade metamorphic rocks
(Springer-Verlag, 1989-03)
Högbomite has generally been considered to be a rare accessory phase in metamorphic rocks. While investigating high-grade peraluminous metamorphites in the Benson Mine District, Adirondack Mountains, New York and the ...
The heat-capacity of ilmenite and phase equilibria in the system Fe-T-O
(Elsevier, 1985-10)
Low temperature adiabatic calorimetry and high temperature differential scanning calorimetry have been used to measure the heat-capacity of ilmenite (FeTiO3) from 5 to 1000 K. These measurements yield S2980 = 108.9 J/(mol ...
Thermodynamics and crystal chemistry of the hematite–corundum solid solution and the FeAlO 3 phase
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2002-09)
High-temperature oxide-melt calorimetry and Rietveld refinement of powder X-ray diffraction patterns were used to investigate the energetics and structure of the hematite–corundum solid solution and ternary phase FeAlO 3 ...
Sulfur speciation in heavy petroleums: Information from X-ray absorption near-edge structure
(Elsevier, 1991-03)
The chemical speciation of sulfur in heavy petroleums, petroleum source rock extracts, and source rock pyrolysis products was studied using X-ray absorption near-edge structure (XANES) spectroscopy. The good energy resolution ...
Global comparisons of organic matter in sediments across the Cretaceous/Tertiary boundary
(Elsevier, 1990)
The Cretaceous/Tertiary (K/T) boundary is marked by extensive changes in the sedimentary fossil record of continental and marine life. Organic matter in sediments from above and below the K/T boundary has been studied to ...
The 57Fe Mossbauer parameters of pyrite and marcasite with different provenances
(Elsevier, 1982-05)
Eighteen pyrite and twelve marcasite samples which have different provenances have been investigated to determine the systematics of the influence of mineralogical and geological factors on the 57Fe Mossbauer spectra at ...