Calcite u-pb dating

calcite u-pb dating

Can calcite U-Pb dating be used to constrain the age of oceanic crust?

The manuscript “Calcite U-Pb dating of altered ancient oceanic crust in the North Pamir, Central Asia” by Rembe et al presents a new application of U-Pb dating of calcite to constrain the age of oceanic crust, applied to addressing questions of the age and lateral continuity of ophiolite belts in the Pamir and Western Kunlun.

Can calcite U-Pb be used to constrain the timing of Carlin-type gold deposits?

This study shows that the calcite U-Pb method can be used to constrain the timing of Carlin-type gold deposits and successive hydrothermal events. You do not currently have access to this article.

Are calcite cements in the Urgonian microporous limestone of southeastern France U-Pb-dated?

In this study we performed absolute U-Pb dating of calcite cements occurring in the Urgonian microporous limestone (northern Tethys margin) of southeastern France.

Can calcite phases be used as secondary RM for ocean-floor basalt?

The message we would like to highlight here is that calcite phases yielded useful U-Pb ages that constrain (not directly date) the formation of ocean-floor basalt. The authors use WC-1 (incorrectly labeled WC01 in their text) as secondary RM to evaluate the accuracy of their data. Reply: Thank you for pointing it out.

What type of rock does calcite replace?

Calcite replacement is a common phenomenon in deep volcanic rock and volcaniclastic rock. Calcite may replace phenocrysts in lava and crystal fragments in volcaniclastic rock, and they also replace all types of debris and matrix. Extensive replacement may make the former rock texture unidentifiable or form replaced carbonate rocks.

What is calcite?

What is Calcite? Calcite is a rock-forming mineral with a chemical formula of CaCO 3. It is extremely common and found throughout the world in sedimentary, metamorphic, and igneous rocks. Some geologists consider it to be a ubiquitous mineral - one that is found everywhere.

Whats the difference between calcite seas and aragonite seas?

A calcite sea, lower in magnesium, favors low-magnesium calcite. The secret is fresh seafloor basalt, whose minerals react with magnesium in seawater and pull it out of circulation. When plate tectonic activity is vigorous, we get calcite seas. When its slower and spreading zones are shorter, we get aragonite seas.

What type of cations are in basaltic rocks?

Basaltic rocks are rich in divalent cations (e.g. Ca2+, Mg2+ and Fe2+). The CO2-charged water accelerates metal release and the formation of solid carbonate minerals such as Calcite (CaCO3), Magnesite (MgCO3) and Siderite (FeCO3) for long term storage of CO2 [4, 6, 8, 9].

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