Latest Geochemistry Stories
It just got easier to pinpoint biological hot spots in the world's oceans where some inhabitants are smaller than, well, a pinpoint.Microscopic algae are called phytoplankton and range from one to hundreds of microns in size "“ the smallest being 1/100th the size of a human hair. But as tiny as they may be, communities of the phytoplankton south of Vancouver Island, British Columbia, are big players when it comes to carbon: They take up 50 percent of the carbon dioxide going from the...
VANCOUVER, Sept. 27 /PRNewswire-FirstCall/ - Kiska Metals Corporation ("Kiska" or the "Company") reports that the first drillhole completed at the Whistler Deposit, on the wholly-owned Whistler Property, has extended mineralization 80 metres to the south and a further 125 metres to depth from previous drilling. Hole WH10-019 intersected 203 metres averaging 0.44 g/t gold, 0.22% copper and 1.15 g/t silver (0.86 g/t gold equivalent) from 296 metres depth. A second intersection at depth...
DENVER, Sept. 9 /PRNewswire/ -- Supatcha Resources Inc. (OTC Bulletin Board: SAEI) ("Supatcha" or the "Company") is pleased to announce that it has mobilized a surface drill and has begun the diamond drilling segment of its exploration program at the Company's recently acquired Vynohradiv property in Barlevskoye Mining District, Ukraine. The Vynohradiv property, including the Barlevskoye license, was the primary exploration asset Supatcha acquired in its acquisition in April 2010. A...
TSX: PFN OTCBB: PAWEF Frankfurt: P7J ------------------------------------------------------------------------- - First and second year option agreement obligations fulfilled, second year program commencing - 2010 program includes the completion of an updated NI43-101 resource estimate - Historic core re-sampling to continue, will provide basis for updated resource estimate - Field mapping and follow-up of airborne geophysical...
Emissions of carbon dioxide are causing ocean acidification as well as global warming. Scientists have previously used computer simulations to quantify how curbing of carbon dioxide emissions would mitigate climate impacts. New computer simulations have now examined the likely effects of mitigation scenarios on ocean acidification trends. They show that both the peak year of emissions and post-peak reduction rates influence how much ocean acidity increases by 2100. Changes in ocean pH over...
Earth has done an ecological about-face: Global plant productivity that once flourished under warming temperatures and a lengthened growing season is now on the decline, struck by the stress of drought.NASA-funded researchers Maosheng Zhao and Steven Running, of the University of Montana in Missoula, discovered the global shift during an analysis of NASA satellite data. Compared with a six-percent increase spanning two earlier decades, the recent ten-year decline is slight -- just one...
Rice study: Human activity eclipses Brazos River's native carbon cycleA new study by geochemists at Rice University finds that damming and other human activity has completely obscured the natural carbon dioxide cycle in Texas' longest river, the Brazos."The natural factors that influence carbon dioxide cycling in the Brazos are fairly obvious, and we expected the radiocarbon signature of the river to reflect those influences," said study co-author Caroline Masiello, assistant...
Researchers discover evidence for the oldest Earth mantle reservoir on Baffin IslandResearchers have found a primitive Earth mantle reservoir on Baffin Island in the Canadian Arctic. Geologist Matthew Jackson and his colleagues from a multi-institution collaboration report the finding--the first discovery of what may be a primitive Earth mantle--this week in the journal Nature.The Earth's mantle is a rocky, solid shell that is between the Earth's crust and the outer core, and makes up about...
Meteorologists have determined exactly how much carbon dioxide humans can emit into the atmosphere while ensuring that the earth does not heat up by more than two degreesThe Intergovernmental Panel on Climate Change (IPCC) calculated projected temperature changes for various scenarios in 2007 and researchers at the Max Planck Institute for Meteorology in Hamburg have now gone one step further: they have developed a new model that specifies the maximum volumes of carbon dioxide that humans may...
TSX-V: MNV OTC: MXVDF Frankfurt: M2Q VANCOUVER, July 26 /PRNewswire-FirstCall/ - Mexivada Mining Corp. ("MNV") has optioned its Moussondji Prospecting permit (gold) and its 5 Permis des Recherches exclusive permits for gold and diamond exploration in the ROC Republic of Congo to East American Resources (Pty) Ltd. ("EAR"), a diversified mining company based in Johannesburg South Africa, in an agreement dated July 20, 2010, the "Effective Date". Mexivada is an exploration...
Latest Geochemistry Reference Libraries
Diorite is a grey to dark grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), hornblende, and/or pyroxene. Varieties deficient in hornblende and other dark minerals are called leucodiorite. It is often described as "salt and pepper" when composed largely of light-colored minerals randomly interspersed with dark minerals. When olivine and more iron-rich augite are present, the rock grades into ferrodiorite, which is transitional to...
Gabbro is a dark, coarse-grained, intrusive igneous rock chemically equivalent to basalt. It is a plutonic rock, formed when molten magma is trapped beneath the Earth's surface and cools slowly into a hard, coarsely crystalline mass. It is dense, greenish or dark-colored and contains varied percentages of plagioclase feldspar, pyroxene, amphibole, and olivine (called olivine gabbro when olivine is present in large quantities). Quartz gabbros are also known to occur and are probably derived...
Syenite is a coarse-grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or present in relatively small amounts. The feldspars are alkaline in character and the dark mineral is usually hornblende. Soda-lime feldspars may be present in small quantities. The term syenite was originally applied to hornblende granite like that of Syene in Egypt, from which the name is derived. Syenite is not a common rock, some of the more important...
