alkalic in English
In the northern Cordillera lower Paleozoic alkalic and potassic mafic magmatism is linked with rifting of the Selwyn Basin.
Use "alkalic" in a sentence
1. Some basalts of the orogene border seem to be less alkalic.
2. Alcaic definition in English dictionary, Alcaic meaning, synonyms, see also 'Alcoranic',Alai',alcaide',alkalic'
3. These phases probably represent a differentiation sequence from an 'I-type' parent magma of calc-alkalic affinity.
4. This, coupled with the occurrence of calc-alkalic volcanics at Glenrock and MORB and alkalic metabasites further southeast argues for variable loci of magma production and source region inhomogeneity along the fore-arc.
5. Muscovite is the main indicator mineral for alkalic alteration and occurs in veins that contain anorthoclase or quartz.
6. Decompression melting of the mantle associated with back-arc generation resulted in mantle melting and the formation of the alkalic basalts.
7. in the amount of 0.3-5 % by weight, Fe-oxides in the amount of 0-10 % by weight, alkalic earth oxides in the amount of 32-45 % by weight and alkalic oxides in the amount of 0-6 % by weight.
8. Albite definition, the sodium end member of the plagioclase feldspar group, light-colored and found in alkalic igneous rocks
9. The chemical characteristics of the mafic volcanic rocks and associated mafic intrusions consistently indicate alkalic affinity and a continental within-plate setting.
10. The prospect is structurally controlled and contains several cross-cutting vein sets that have alkalic, chloritic, or argillic alteration assemblages.
11. ¶To enhance the ability to distinguish tholeiitic from alkalic magma parentages by mineral compositions, I determined trace-element abundances in plagioclase separated from xenolithic gabbros of Mauna Kea volcano. These gabbros have origins in tholeiitic and alkalic magmas of the Hamakua postshield stage of Mauna Kea volcanism.
12. A crustforming event with calk-alkalic granitoid intrusions which with time moves westwards is followed by remelting and intrusion of alkali-intermediate granites and metamorphism.
13. However, incompatible trace-element concentrations are strongly influenced by mantle metasomatism that occurred prior to, or synchronously with, the oldest alkalic rocks.
14. A method of water treatment comprising: providing an electrolysis device comprising an electrolysis vessel; providing feed streams to the first salt water chamber of the vessel, second salt water chamber of the vessel, acidic chamber of the vessel, and alkalic chamber of the vessel, the acidic chamber producing an acidic solution and the alkalic chamber producing an alkalic solution; directing at least a portion of the contents of the first and second salt water chambers into a precipitation tank; directing at least a portion of the alkalic solution into the precipitation tank, thereby increasing the pH in the precipitation tank to produce precipitate; and removing the precipitate from the precipitation tank.
15. Trace-element data indicate these alkalic lavas have been generated by small, but variable, amounts of partial melting of a meta-somatized lherzolite source.
16. The evidence suggests that upper crustal processes predominate in the formation of the majority of ore deposits considered (excepting carbonatites, alkalic complexes and diamond pipes).
17. If these liquids could be separated from the residuum and crystallized they would be, as yet, unrecognized members of the alkalic high-alumina basalt suite.
18. Most LG amphibolites have relatively high Nb, TiO2, Zr, and light rare earth element contents, indicative of an alkalic to tholeiitic, within-plate basalt origin.
19. Andradite is found in skarns from contact metamorphosed impure limestones or calcic igneous rocks; in chlorite schists and serpentinites; in alkalic igneous rocks, then typically titaniferous.
20. Mass balancing suggests that the alkalic-tholeiitic hybridization involved ∼44% hawaiite mixed with a nearly equal amount of tholeiitic hybrid (MgO ∼9.5 wt.%) plus olivine and andesine.
21. Andradite occurs “in skarns from contact metamorphosed impure limestones or calcic igneous rocks, in chlorite schists and serpentinites, [and] in alkalic igneous rocks, [where there are] then typically titaniferous
22. Among these granitoids, the most important chemical difference is between calc-alkalic differentiated granitoids to the west and alkalicalcic more evolved granites to the east of an intraorogenic “suture” (the Mylonite Zone).
23. The highly alkalic glass contains 0.1 wt.% S (considered high), and indicates a high original volatile content and drastic quenching, probably during phreatomagmatic eruption from a meltwater-flooded vent.
24. A highly liquid working fluid being a good heat transport fluid and a good electrical conductor, is based upon a solution of ammonia and one or more alkalic metals, particularly lithium.
25. When postshield hawaiite magmas subsequently entered reservoirs, alkalic-tholeiitic hybridization occurred; the resulting `complex' mixture of hawaiite+tholeiitic hybrids resorbed andesine and clinopyroxene crystals and, upon eruption, entrained xenoliths of gabbro.
26. Chondrite-normalized REE plots show relatively flat patterns, with only slight LREE enrichment for tholeiitic compositions and greater LREE enrichment and lower heavy-rare-earth-element (HREE) abundance for calc-alkalic compositions.
27. Geological mapping of the volcano has indicated that as much as 80% of the volcano's surface has been topped by lava flows during the last 5,000 years, entirely composed of shield alkalic basalt.
28. The minettes and their xenoliths have overlapping values of 87Sr/86Sri, eNdT, 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb, similar to those of alkaline igneous rocks from farther south in the Montana alkalic igneous province.
29. Alkalic volcanics associated with abrupt facies changes across the ancient shelf break, intervals of slope debris breccia deposits, and distal turbidite flows suggest the margin was characterized by intervals of volcanism, basin foundering, and platform flooding.
30. When magma production rates declined during the shield to postshield transition of tholeiitic to alkalic magmatism, the tholeiitic hybrids in reservoirs fractionated to yield highly evolved phases such as andesine and clinopyroxene with Mg# < 75.
31. Comparison with petrological data of the volcanic rocks also implies that olivine was in a reaction relationship with an intermediate alkalic magma in both the intruded magmas at shallow depth and in the magma chamber at great depth.
32. This assortment of mineral and rock components within alkalic lavas with apparent Mg enrichment is owed to a complex history that began with protracted mixing among primitive and differentiated tholeiitic magmas, probably near the end of shield building.
33. One postshield vent erupted alkalic lavas (K2O 1.1–1.6 wt.%) with resorbed olivines of wide compositional range (cores, Fo86–71), resorbed Na-plagioclase (An57–30; largely andesine) and clinopyroxene (evolved; Mg#s 76–71), and groundmass orthopyroxene (Mg# ≤62).
34. The Pickle Crow assemblage consists of tholeiitic basalt with thin, but laterally extensive, oxide-facies iron formation overlain by alkalic basalts and minor calc-alkaline andesites to dacites with primitive Nd isotopic compositions (εNd2.89 Ga = +2.1 to +2.4) suggestive of deposition in a sediment-starved oceanic basin.
35. All basalts have the composition of transitional olivine-tholeiites and a primary vertical variation, with a tendency towards a slightly more alkalic composition, was recognized in spite of the chemical changes induced by sea-water alteration which has affected rather deeply these rocks.
36. The relatively primitive compositions (MgO > 9%), presence of mantle-derived xenoliths in some alkalic lavas, and presence of forsteritic olivine with low CaO and high NiO suggest that magma rose rapidly from greath depth without spending time in large, long-lived magma chambers.
37. The Valin Anorthositic Suite includes the 1016 ± 2 Ma andesine-type Mattawa Anorthosite, the 1010–1008 Ma andesine-type Labrieville Alkalic Anorthositic Massif, the 1020 ± 4 Ma St. Ambroise Pluton, the 1018+7–3 Ma Farmer Monzonite; the 1010 ± 2 Ma Gouin Charnockite, and the 1010 ± 3 Ma La Hache Monzonite.