zircons in English

noun
1
a mineral occurring as prismatic crystals, typically brown but sometimes in translucent varieties of gem quality. It consists of zirconium silicate and is the chief ore of zirconium.
Sillimanite, cordierite, apatite, monazite and zircon are also present.

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Below are sample sentences containing the word "zircons" from the English Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "zircons", or refer to the context using the word "zircons" in the English Dictionary.

1. The results on hornblendes, plagioclases and zircons establish the isotopic age of intrusion and the mode of cooling.

2. The comparative study of natural zircons which were experimentally corroded by hydrothermal treatment, and of zircons isolated from an albitized granite allow to show the respective roles which are played in the corrosion of this mineral by some internal (state of crystallization) or external factors (chemical nature of the environment, temperature).

3. In the Cathodoluminescence(CL)images the zircons extracted from the dioritic gneiss show good crystal morphology and clear oscillatory zoning, as is the case of magmatic zircon.

4. Comparisons between this reference and the ages of detrital zircons in strata of potentially displaced outboard terranes may help reconstruct the paleogeography and accretionary history of the Cordilleran orogen.

5. Accelerated radioisotope decay of 238 U in zircons within the Biotites rapidly formed the 238 U radiohalos and produced large quantities of the short-lived 222 Rn and Po isotopes

6. Albitized rocks have distinctive zircons with U-enriched cores (up to 6.1 wt% UO2), and Hf-enriched margins (up to 14.0wt% HfO2) with fine-scale growth-zoning of their Hf content.

7. Unlike their arc-related counterparts, however, the Chinese magmas carry inherited Archaean zircons and have neodymium and strontium isotopic compositions overlapping those of eclogite xenoliths derived from the lower crust of the North China Craton.

8. age of 109 Ma (Mueller and Nemchin, 2005), similar to but younger than any previously dated zircons in the Los Ranchos Formation (Kesler et al., 2005), clearly limiting Pueblo Viejo mineralization to an Early Cretaceous Age coeval with the Los Ranchos

9. Texturally guided U–Pb spot analyses on partially metasomatised zircons from the alkali granite gneiss yield a cluster of 207Pb/206Pb ages at 1389 ± 8 Ma, interpreted as the time of igneous crystallization and four ages overlapping the time of syenite emplacement, interpreted as in situ, metasomatic growth.

10. Published and new U-Pb age data of zircons from volcaniclastic layers bracketing the stratigraphic interval of platform growth constrain the duration of platform evolution to a time span shorter than 1.8±0.7m.y., probably in the order of 0.5-1m.y., reflecting fast rates of vertical platform aggradation exceeding 500 m/m.y.