Salt-forming regions of seawater type solution in the evaporation and fractional crystallization process

2014 ◽  
Vol 362 ◽  
pp. 281-287 ◽  
Author(s):  
Huan Zhou ◽  
Yanjuan Bao ◽  
Xiaoqin Bai ◽  
Ruoxin Ma ◽  
Lisha Huangfu ◽  
...  
Keyword(s):  
Fractional Crystallization ◽  
Crystallization Process ◽  
Type Solution ◽  
Fractional Crystallization Process

scholarly journals Caracterização Petrográfica e Geoquímica da Parte Leste do Granito Europa, Distrito Mineiro de Pitinga, AM

2007 ◽  
Vol 34 (1) ◽  
pp. 77 ◽  
Author(s):  
MAURÍCIO PRADO ◽  
JOSÉ TADEU MAXIMINO MIRRAS FERRON ◽  
EVANDRO FERNANDES DE LIMA ◽  
ARTUR CEZAR BASTOS NETO ◽  
VITOR PAULO PEREIRA ◽  
...  
Keyword(s):  
Fractional Crystallization ◽  
Genetic Relationship ◽  
Crystallization Process ◽  
Volcanic Rocks ◽  
Alkali Feldspar ◽  
Mineral Deposits ◽  
Geochemical Data ◽  
Principal Mechanism ◽  
Amazonian Region ◽  
Fractional Crystallization Process

The important mineral deposits of the Pitinga Mine, in the Amazonian region are related to A-type granites intruded in the Iricoumé Group. The Europa granite is one of these A-type rocks, intruded in the Iricoumé Group, which is represented by subaerial vulcanoclastic rocks (crystal-rich ignimbrites, thin massive tuffs and siltic tufaceous arenites) and minor hipabissal rhyolites. The volcanic rocks were probably generated in a caldera environment. The Europa granite is an alkali-feldspar peralkaline granite (hipersolvus) without genetic relationship with to the volcanic rocks of the Iricoumé Group, but it could have been generated during the resurgence stages. The petrographic and geochemical data attest that fractional crystallization process was the principal mechanism during the crystallization, which led to the generation of two different granitic facies. The Nb soil anomalies overprinted on the more differentiated facies are related to the astrophillite weathering.

Etude geochimique des elements en traces dans les series de roches volcaniques du rift d'Asal; identification et analyse des processus d'accretion

1980 ◽  
Vol S7-XXII (6) ◽  
pp. 851-861 ◽  
Author(s):  
J. L. Joron ◽  
M. Treuil ◽  
H. Jaffrezic ◽  
B. Villemant
Keyword(s):  
Partial Melting ◽  
Fractional Crystallization ◽  
Closed System ◽  
Mantle Source ◽  
Crystallization Process ◽  
Tectonic Activity ◽  
Dynamic Evolution ◽  
Mantle Material ◽  
Spreading Rates ◽  
Fractional Crystallization Process

Abstract Study of samples of the main volcanic units of the Afar rift, from margins to late axial series, have yielded the following conclusions: 1) the magmatic liquids are strongly differentiated by a fractional crystallization process in shallow chambers, the evolution of which is limited by injection of new primary liquids as shown in the latest axial series; 2) primary liquids are generated by melting of a homogeneous mantle source, a process whereby successive partial melting in a closed system is stopped by percolation of the generated liquid. The degrees of partial melting are closely related to spreading rates; 3) the magmatic processes involve a discontinuous dynamic evolution of spreading displayed by a pulsatory magmato-tectonic activity which is controlled by the speed of decompression of mantle material.

scholarly journals Effect of coolant temperature and cooling time on fractional crystallization of biodiesel and glycerol

2017 ◽  
Vol 13 (4) ◽  
pp. 676-679
Author(s):  
Shafirah Samsuri ◽  
Nurul Aini Amran ◽  
Loh Jia Zheng ◽  
Muhammad Muhaimin Mohd Bakri
Keyword(s):  
Methyl Ester ◽  
Fractional Crystallization ◽  
Crystallization Process ◽  
Current Method ◽  
Cooling Time ◽  
Coolant Temperature ◽  
Time Range ◽  
Separation And Purification ◽  
Wastewater Treatment Process ◽  
Fractional Crystallization Process

In the middle of the era of technology and fast-growing industry nowadays, biodiesel (methyl ester) has been identified as a sustainable fuel to replace petroleum. Hence, the separation and purification of the methyl ester after the trans-esterification process is essential since the purification of methyl ester is compulsory for the fuel industry in order to fulfill the strict global standard particulars for methyl ester. One of the current method used for separation and purification of methyl ester is called wet washing technology. However, this technology has its own drawbacks such as huge amount of water consumption as well as high cost for the wastewater treatment process. Due to these drawbacks, fractional crystallization process is proposed in order to save water and minimize the time consumed for the process of separation and purification of methyl ester. Fractional crystallization is a process that involved a solid-liquid separation where the process takes place in a crystallizer. In this process, methyl ester was separated from the glycerol based on their differences in term of melting point of the components. By observing the layer formation of the components, the effect of cooling time and coolant temperature on the performance of separation and purification of methyl ester by fractional crystallization process were studied. The purified methyl ester obtained was placed in a gas chromatographer in order to test the purity of methyl ester and to evaluate the efficiency of the process based on two parameters that has been investigated which are effective partition constant (K) and concentration efficiency (Eff). It was found that to achieve highest effectiveness of fractional crystallization system and highest concentration efficiency where K and Eff are 0.51 and 47.71%, respectively, the fractional crystallization must operate at coolant temperature range of -10 to -12ºC and cooling time range of 30 to 35 minutes.

scholarly journals EVOLUTION AND ORIGIN OF THE MARONIA PLUTON, THRACE, GREECE

2004 ◽  
Vol 36 (1) ◽  
pp. 568 ◽  
Author(s):  
L. Papadopoulou ◽  
G. Christofides ◽  
Α. Koroneos ◽  
M. Bröcker ◽  
T. Soldatos ◽  
...  
Keyword(s):  
Partial Melting ◽  
Fractional Crystallization ◽  
Lithospheric Mantle ◽  
Crystallization Process ◽  
Acid Group ◽  
Magma Source ◽  
Subcontinental Lithospheric Mantle ◽  
Basic Group ◽  
Intermediate Group ◽  
Fractional Crystallization Process

The Maronia pluton is the youngest of the Tertiary plutons that occurred in Thrace. Three rock groups have been distinguished: a basic, an intermediate and an acid one. Based on geochemical and isotopie characteristics, the basic group probably represents a magma that isotopically equilibrated with the intermediate group at a certain point of its evolution. The evolution of the intermediate group can be described by an assimilation-fractional crystallization process (AFC). The acid group represents crustai melts that are not genetically related to the basic and intermediate groups. The emplacement of the pluton is related to post-collisional extension resulting from the subduction of the African under the European plate. The magma source of the basic and intermediate group is considered to be a LI LE- and LREE-enriched subcontinental lithospheric mantle. The acid group has probably derived by the partial melting of crustai rocks and in particular, gneiss.

scholarly journals Quaternary post-collision alkaline volcanism NW of Ahar (NW Iran): geochemical constraints of fractional crystallization process

2011 ◽  
Vol 62 (6) ◽  
pp. 547-562 ◽  
Author(s):  
Rahim Dabiri ◽  
Mohamad Emami ◽  
Habib Mollaei ◽  
Bin Chen ◽  
Mansor Abedini ◽  
...  
Keyword(s):  
Trace Element ◽  
Fractional Crystallization ◽  
Crystallization Process ◽  
Spinel Peridotite ◽  
Alkali Basalts ◽  
Nw Iran ◽  
Alkaline Volcanism ◽  
Nonlinear Trends ◽  
Geochemical Constraints ◽  
Fractional Crystallization Process

Quaternary post-collision alkaline volcanism NW of Ahar (NW Iran): geochemical constraints of fractional crystallization process Major and trace elements and Sr-Nd isotopic data are presented for the Quaternary alkaline volcanism NW of Ahar (NW Iran). The exposed rocks mainly consist of alkali basalts, trachybasalts, basaltic trachyandesites and trachyandesites. Alkali basalts and trachybasalts display microlithic porphyritic texture with phenocrysts of olivine, clinopyroxene, and plagioclase in microlithic groundmass. In the more evolved rocks (basaltic trachyandesites and trachyandesites), amphibole and biotite have appeared. Major and trace element abundances vary along continuous trends of decreasing MgO, TiO2, Fe2O3*, CaO, Co, Cr, V and Zn, and increasing K2O, Al2O3, Ba and Th with increasing SiO2. The Sr and Nd isotopic ratios vary from 0.704463 to 0.704921 and from 0.512649 to 0.512774, respectively. Alkali basalts with high 143Nd/144Nd ratio, low 87Sr/86Sr ratio and high MgO, Ni and Cr contents indicate that they were generated from relatively primitive magmas. Ba, Cr and La/Sm ratios versus Rb suggest that fractional crystallization of alkali basalts could have played a significant role in the formation of evolved rocks. Assimilation and fractional crystallization modelling, as well as Rb/Zr, Th/Yb and Ta/Yb ratios clearly indicate that crustal contamination accompanied by the fractional crystallization played an important role in petrogenesis of the trachyandesites. The small compositional differences between magma types, isotopic composition, mineralogy and nonlinear trends on Harker diagrams also indicate that magma mixing was not an essential process in the evolution of the Ahar magmas. Petrogenetic modelling has been used to constrain sources. Trace element ratio plots and REE modelling indicate that the alkali basalts were generated from a spinel-peridotite source via small degrees (~2.5%) of fractional melting.

scholarly journals The 1590-1520 Ma Cachoeirinha magmatic arc and its tectonic implications for the Mesoproterozoic SW Amazonian craton crustal evolution

2004 ◽  
Vol 76 (4) ◽  
pp. 807-824 ◽  
Author(s):  
Amarildo S. Ruiz ◽  
Mauro C. Geraldes ◽  
João B. Matos ◽  
Wilson Teixeira ◽  
William R. Van Schumus ◽  
...  
Keyword(s):  
Crystallization Process ◽  
Major And Trace Elements ◽  
Magmatic Arc ◽  
Rio Negro ◽  
Intrusive Rocks ◽  
Amazonian Craton ◽  
Granitoid Rocks ◽  
Geologic Setting ◽  
Fractional Crystallization Process ◽  
Tectonic Relationship

Isotopic and chemical data of rocks from the Cachoeirinha suite provide new insights on the Proterozoic evolution of the Rio Negro/Juruena Province in SW Amazonian craton. Six U-Pb and Sm-Nd analyses in granitoid rocks of the Cachoeirinha suite yielded ages of 1587-1522 Ma and T DM model ages of 1.88-1.75 Ga (EpsilonNd values of -0.8 to +1.0). In addition, three post-tectonic plutonic rocks yielded U-Pb ages from 1485-1389 Ma (T DM of 1.77-1.74 Ga and EpsilonNd values from -1.3 to +1.7). Variations in major and trace elements of the Cachoeirinha suite rocks indicate fractional crystallization process and magmatic arc geologic setting. These results suggest the following interpretations: (1) The interval of 1590-1520 Ma represents an important magmatic activity in SW Amazonian craton. (2) T DM and arc-related chemical affinity supportthe hypothesis that the rocks are genetically associated with an east-dipping subduction zone under the older (1.79-1.74 Ga) continental margin. (3) The 1590-1520 Ma age of intrusive rocks adjacent to an older crust represents similar geological framework along the southern margin of Baltica, corroborating the hypothesis of tectonic relationship at that time.

Sign in / Sign up

Export Citation Format

Share Document