Now showing items 161-170 of 192
Formation mechanisms of illite, chlorite and mixed-layer illite-chlorite in Triassic volcanogenic sediments from the Southland Syncline, New Zealand
(Springer-Verlag, 1988-05)
Clay minerals from the three principal kinds of zeolitic sediments from the type area for zeolite facies alteration, the Triassic Murihiku Supergroup, Southland, New Zealand, have been studied by TEM. Bentonitic tuff ...
Oil generation in the michigan basin: A biological marker and carbon isotope approach
(Elsevier, 1986)
Palaeozoic strata in the Michigan Basin produced crude oils which, despite their rather small volume and economic value, are interesting because of the considerable age of the basin and because of the opportunity to study ...
Direct measurements of latent heat during crystallization and melting of a ugandite and an olivine basalt
(Springer-Verlag, 1994-06)
Step-scanning calorimetric measurements using a Setaram HT1500 calorimeter were performed between 800 and 1400°C on two natural samples: a ugandite from the East African rift and an olivine basalt from the western Mexican ...
Trace-metal content of the Pueblo Viejo precious-metal deposits and their relation to other high-sulfidation epithermal systems
(Springer-Verlag, 2003-09)
We provide here information on the distribution of copper, zinc, lead, gold, silver, barium, arsenic, antimony, mercury, selenium and tellurium in the Moore and Monte Negro high-sulfidation epithermal deposits in the Pueblo ...
Time scales of large volume silicic magma systems: Sr isotopic systematics of phenocrysts and glass from the Bishop Tuff, Long Valley, California
(Springer-Verlag, 1993-01)
The initial Sr isotopic compositions of glass and mineral separates from the 0.74 Ma Bishop Tuff ashflow in eastern California were determined to investigate the time scales of magmatic processes in a large silicic system. ...
Ion microprobe determination of sulfur isotope variations in iron sulfides from the Post/ Betze sediment-hosted disseminated gold deposit, Nevada, USA
(Elsevier, 1993-04)
Secondary ion mass spectrometric analyses of ore samples from the Post/Betze sedimenthosted disseminated gold deposit were utilized to constrain elemental distribution of Au and As in iron sulfide phases. Most of the Au ...
Sedimentation and sediment accretion in Michigan coastal wetlands (U.S.A.),
(Elsevier, 1984-05)
Sediment transport and accretion rates were studied for three different types of coastal wetlands of Lake Michigan, U.S.A. A forested intradunal wetland (Cranberry Bog No. 1) near Stevensville, Michigan, displayed sediments ...
Magma mixing in the San Francisco Volcanic Field, AZ
(Springer-Verlag, 1989-08)
A wide variety of rock types are present in the O'Leary Peak and Strawberry Crater volcanics of the Pliocene to Recent San Francisco Volcanic Field (SFVF), AZ. The O'Leary Peak flows range from andesite to rhyolite (56–72 ...
The europium anomaly of seawater: implications for fluvial versus hydrothermal REE inputs to the oceans
(Elsevier, 1991-10-25)
Seafloor hydrothermal vent fluids are characterized by rare earth element (REE) enrichments and large positive Eu anomalies; however, this input is not recorded by seawater. Hydrothermal sediments from the southeast Pacific ...
History of sea water. Constant temperature-pressure equilibrium models compared to liquid inclusion analyses
(Elsevier, 1965-08)
An inorganic ocean is derived from the solution equilibrium of clay minerals, calcite, OH-apatite, CO2-F-apatite, phillipsite, gypsum, strontianite, celestite and aragonite. The minerals are considered in equilibrium in ...