Relationship between the Texture and Composition of Titanomagnetite in Hannuoba Alkaline Basalt: A New Geospeedometerdoi:10.2139/ssrn.4172901Hannuoba alkaline basaltcrystal size distributioncooling ratetitanomagnetitegeospeedometerThe nucleation and growth of crystals in igneous rocks usually occur under ...
1.A hard, dense, dark igneous rock composed chiefly of plagioclase feldspar, pyroxene, and olivine, and often having a glassy appearance. 2.A kind of hard unglazed pottery. [From New Latinbasaltēn,a misreading (in manuscripts of Pliny)of Latinbasanītēn, accusative ofbasanītēs,a word Pl...
It has also been hypothesized that melting beneath ridges is a dynamic, near-fractional process during which the pressure, temperature, and composition of theupper mantlechange. Variations in these parameters as well as in the geometry of the melting region result in the generation of MORB with ...
All indications are that it is everywhere basaltic and relatively constant in composition. 所有的迹象只表明海洋地壳处都是玄武岩质的,组成也比较稳定。 —— 辞典例句 4. Huoshan Dan black texture, basalt, granite, marble, and so on. 质地有黑色火山石 、玄武岩、 花岗岩 、 大理石等。
Basalt is adark-colored, fine-grained, igneous rockcomposed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to...
Basalt is a dark-colored, fine-grained,igneous rockcomposed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to...
volcanic regions around the world. It forms from the melting of the upper mantle and its chemistry closely resembles the upper mantle's composition. It is generally silica poor and iron and magnesium rich. Basalt originates from "hot spot" volcanoes, massive basalt flows and mid oceanic ridges...
composition of this mantle wedge would have initially formed the sources tapped during the development of the KPR chain of stratovolcanoes, as sampled by Unit III pyroclastics34. In conclusion, widespread development of magmatism in the IBM system following subduction initiation, both along- and acro...
1.21.3.3Mare Basalt Trace-element and Isotopic Trends Marebasalts, being young by lunar standards, are, as a rule, far less battered by impact processes than highland rocks; they are also generally closer in composition to their parent melts (i.e., the proportion of cumulates is far higher...
Geomechanics abstract Properties of rocks and soils Texture, structure, composition and density Cyclic fracture mechanicsms in cooling basalt : Ryan, M P; Sammis, C G Geol Soc Am Bull, V89, N9, Sept 1978, P1295–1308 Available online 10 February 2003 About ScienceDirect Contact and support...