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  1. Article

    Open Access

    A direct association between amber and dinosaur remains provides paleoecological insights

    Hadrosaurian dinosaurs were abundant in the Late Cretaceous of North America, but their habitats remain poorly understood. Cretaceous amber is also relatively abundant, yet it is seldom found in direct stratig...

    Ryan C. McKellar, Emma Jones, Michael S. Engel, Ralf Tappert… in Scientific Reports (2019)

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    Article

    Diamond formation episodes at the southern margin of the Kaapvaal Craton: Re–Os systematics of sulfide inclusions from the Jagersfontein Mine

    Sulfide inclusions in diamonds from the 90-Ma Jagersfontein kimberlite, intruded into the southern margin of the Kaapvaal Craton, were analyzed for their Re–Os isotope systematics to constrain the ages and pet...

    Sonja Aulbach, Steven B. Shirey… in Contributions to Mineralogy and Petrology (2009)

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    Article

    Diamondiferous peridotitic microxenoliths from the Diavik Diamond Mine, NT

    Twenty-five diamonds recovered from 21 diamondiferous peridotitic micro-xenoliths from the A154 South and North kimberlite pipes at Diavik (Slave Craton) match the general peridotitic diamond production at thi...

    Steven Creighton, Thomas Stachel… in Contributions to Mineralogy and Petrology (2008)

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    Book

    Links Between Geological Processes, Microbial Activities&Evolution of Life

    Microbes and Geology

    Yildirim Dilek, Harald Furnes… in Modern Approaches in Solid Earth Sciences (2008)

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    Chapter

    Oceanic Pillow Lavas and Hyaloclastites as Habitats for Microbial Life Through Time – A Review

    This chapter summarizes research undertaken over the past 15 years upon the microbial alteration of originally glassy basaltic rocks from submarine environments. We report textural, chemical and isotopic resul...

    Harald Furnes, Nicola McLoughlin… in Links Between Geological Processes, Microb… (2008)

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    Chapter

    Micro-bioerosion in volcanic glass: extending the ichnofossil record to Archaean basaltic crust

    Microbial bioerosion of volcanic glass produces conspicuous ichnofossils in oceanic crusts that are a valuable tracer of sub-surface microorganisms. Two morphologically distinct granular and tubular ichnofossi...

    Nicola McLoughlin, Harald Furnes, Neil R. Banerjee… in Current Developments in Bioerosion (2008)

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    Article

    Archean diamonds from Wawa (Canada): samples from deep cratonic roots predating cratonization of the Superior Province

    With an age of ca. 2.7 Ga, greenschist facies volcaniclastic rocks and lamprophyre dikes in the Wawa area (Superior Craton) host the only diamonds emplaced in the Archean available for study today. Nitrogen ag...

    Thomas Stachel, Anetta Banas… in Contributions to Mineralogy and Petrology (2006)

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    Article

    Diamonds from Jagersfontein (South Africa): messengers from the sublithospheric mantle

    The diamond population from the Jagersfontein kimberlite is characterized by a high abundance of eclogitic, besides peridotitic and a small group of websteritic diamonds. The majority of inclusions indicate th...

    Ralf Tappert, Thomas Stachel, Jeff W. Harris… in Contributions to Mineralogy and Petrology (2005)

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    Article

    Proterozoic low-sulfidation epithermal Au-Ag mineralization in the Mallery Lake area, Nunavut, Canada

    The Mallery Lake area contains pristine examples of ancient precious metal-bearing low-sulfidation epithermal deposits. The deposits are hosted by rhyolitic flows of the Early Proterozoic Pitz Formation, but a...

    William Turner, Jeremy Richards, Bruce Nesbitt, Karlis Muehlenbachs… in Mineralium Deposita (2001)

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    Article

    Origin of low-18O metamorphic rocks from a Late Proterozoic shear zone in the Eastern Desert of Egypt

    Anomalously low and variable 18O/16O ratios (whole rock δ 18OSMOW=−1.9 to +6.0) have been measured in several Late Proterozoic metamorphic units associated with a large scale low-angle ductile shear zone at Meati...

    Neil C. Sturchio, Karlis Muehlenbachs in Contributions to Mineralogy and Petrology (1985)

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    Article

    18O-Enrichment of silicic magmas caused by crystal fractionation at the Galapagos Spreading Center

    An extremely differentiated suite of unaltered volcanic rocks dredged from the Galapagos Spreading Center ranges in δ 18O from 5.7 to 7.1‰ At 95°W, low K-tholeiites, FeTi-basalts, andesites and rhyodacites were r...

    Karlis Muehlenbachs, Gary Byerly in Contributions to Mineralogy and Petrology (1982)

  12. No Access

    Article

    Agents of low temperature ocean crust alteration

    δ 18O and87Sr/86Sr isotopic data from smectites, calcites, and whole rocks, together with published isotopic age determinations, alkali element concentration data and petrographic observations suggest a sequenti...

    Hubert Staudigel, Karlis Muehlenbachs… in Contributions to Mineralogy and Petrology (1981)

  13. No Access

    Article

    Marine hdrothermal alteration at a Kuroko ore deposit, Kosaka, Japan

    Isotopic compositions were determined for quartz, sericite and bulk rock samples surrounding the Uwamuki no. 4 Kuroko ore body, Kosaka, Japan. δ 18O values of quartz from Siliceous Ore (S.O.), main body of Black ...

    Keiko Hattori, Karlis Muehlenbachs in Contributions to Mineralogy and Petrology (1980)