Results 1 to 10 of about 142,365 (357)
Geochemical Features of Magmatic Rocks and Mineral Deposit Genesis of Xinjiang Aktas Gold Deposit
Chemical Engineering Transactions, 2017 There is a close spatial relationship between the ore body of Aktas gold deposit and the contact zone of the rock body of different periods. This paper by conducting a detailed study of geological and geochemical characteristics with 15 samples of ...
Lizhi Yang, Xiangbin Wu, Tiaoli Li
doaj +1 more source
Geochemistry of volcanic rocks
, 2007 This geochemical compilation contains 237 unpublished whole-rock geochemical analyses provided by S. Modeland (pers. comm., 2005) of mafic volcanic rocks and associated mafic intrusions from the Bravo Lake formation of the Piling group of central Baffin Island, Nunavut (Modeland and Francis, 2004).
openaire +1 more source
Influence of Curing Age and Mix Composition on Compressive Strength of Volcanic Ash Blended Cement Laterized Concrete [PDF]
, 2012 This study investigates the influence of curing age and mix proportions on the compressive strength of volcanic ash (VA) blended cement laterized concrete. A total of 288 cubes of 100mm dimensions were cast and cured in water for 3, 7, 28, 56, 90 and 120
Babafemi, A. J +2 more
core +2 more sources
The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 1957 The writer has considered that magma has been re-heated in the course of ascending vent. Comparing the chemical composition of plutonic rocks with that of volcanic rocks, both are nearly equal in the amout of SiO2 and total iron and FeO/Fe2O3 is larger in plutonic rocks than volcanic rocks.
openaire +3 more sources
Explosive volcanism, shock metamorphism and the K-T boundary [PDF]
The issue of whether shocked quartz can be produced by explosive volcanic events is important in understanding the origin of the K-T boundary constituents.
Desilva, S. L., Sharpton, V. L.
core +1 more source
Cenozoic sedimentary and volcanic rocks of New Zealand: A reference volume of lithology, age and paleoenvironments with maps (PMAPs) and database. [PDF]
, 2015 This volume presents descriptive geological data and text about each Cenozoic sedimentary and volcanic geological unit to formation and member level (in some cases) exposed on land in New Zealand, including their lithology, stratigraphic age and inferred
Kamp, Peter J.J. +2 more
core +1 more source
Venus: Geochemical conclusions from the Magellan data [PDF]
Though the Magellan mission was not designed to collect geochemical or petrological information, it has done so nonetheless. Since the time of the Pioneer Venus mission it has been known that high-altitude (greater than 2.5-5 km) mountainous areas on ...
Wood, J. A.
core +1 more source
Keeping watch over Colombia’s slumbering volcanoes [PDF]
, 2015 The Volcanological and Seismological Observatories of Manizales, Pasto and Popayan (Colombian Geological Survey) monitor and study the active volcanoes of Colombia using seismological, geodetic, geochemical and other techniques.
BATTAGLIA, MAURIZIO +5 more
core +1 more source
Indonesian Journal on Geoscience, 2014 http://dx.doi.org/10.17014/ijog.vol4no2.20091The Semilir Formation was typically originated from products of a very explosive volcanic activity, i.e. breccias, lapillistones, and tuffs containing abundant pumice.
Sutikno Bronto +3 more
doaj +1 more source
, 1954 In the Mojave Desert of southeasternmost California is a remarkably smooth, symmetrical rock-alluvial dome which takes its name from Cima on the Union Pacific Railroad. Lawson (1915, pp.
Sharp, Robert P.
core