| 词汇 |
Dacite in a sentence (esp. good sentence like quote, proverb...) |
正文 |
1. The (examination) of the petrography shows that the volcanic terrains in Tengchong are typical of the basalt-(andesite)-(dacite) arc volcanic rock associations of the calc-alkaline series.
2. Its genesis is related to volcanic eruption and dacite porphyry intrusion. And it has some characteristics of porphyry Cu deposit.
3. The volcanic rocks in the study area all belong to sub alkaline series including olivine basalt, andesite and dacite, from basic to intermediate, and to acid.
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4. They include mainly high-alumina basalt, basaltic andesite, a few of andesite and dacite as well, belonging to calc alkaline series but somewhat tholeiitic series in the early stage.
5. The deposit is hosted in the Mesozoic Upper Cretaceous volcanic rocks, associated with dacite, andesite, andesitic porphyrite and rhyolite.
6. Gongpoquan porphyry - type copper deposit is existed in secondary dacite - porphyry and granite - porphyry bodies.
7. Major volcanic rock types of Carboniferous times are andesitic basalt, dacite, rhyolite, characterized by a bimodal volcanic suite.
8. The Qi'eshan Group volcanic rocks consist of basalt, basaltic andesite, dacite and rhyolite.
9. The ore bodies in the Gongpoquan deposit are mainly hosted within granodiorite porphyry and dacite porphyry.
10. Jurassic volcanic rocks in Yingshan fault depression are mainly andesite, basalt, dacite , volcanic breccia and tuff.
11. Optical observation for thin sections, X ray diffraction analyses and chemical analyses are applied to study the formation of a dacite weathering profile in Pingxiang, Guangxi.
12. Carboniferous volcanic rocks in Altay, Xinjiang, mainly exist in its northeastern part. They consist of rhyolite, dacite and cataclastlava.
13. The volcanic rocks belong to high kalium calc alkalic series and can be divided into andesite, dacite, trachydacite and rhyolite by petrochemical composition.
14. On the other hand, the remarkable difference in REE and trace element normalized patterns of basalt, andesite, dacite and rhyolite suggests the different source.
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