AFC-Modeler: a Microsoft® Excel© workbook program for modelling assimilation combined with fractional crystallization (AFC) process in magmatic systems by using equations of DePaolo (1981)
AFC-Modeler: a Microsoft® Excel© workbook program for modelling assimilation combined with fractional crystallization (AFC) process in magmatic systems by using equations of DePaolo (1981)
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AFC-Modeler：一个 Microsoft® Excel© 工作簿程序，用于使用 DePaolo (1981) 方程对岩浆系统中的同化与分步结晶 (AFC) 过程进行建模
DOI：
10.3906/yer-1110-3
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发表时间：
2013
影响因子：
1
通讯作者：
M. Keskin
中科院分区：
文献类型：
--
作者：
M. Keskin
AFC-Modeler是一个用户友好的，交互式的Microsoft Excel工作簿程序，专门设计用于模拟多达10个理论AFC曲线（对应于十个不同的r值; r是质量同化速率与分级结晶速率的比率），对于一组变量，（即D，岩浆中元素初始浓度和同位素比值，围岩中元素初始浓度和同位素比值）。能够为十个不同的“r”值模拟十条曲线是该程序的一个重要特征，因为许多研究结果表明，岩浆岩套的r值通常变化很大，而不是遵循一条曲线。特别注意已采取在程序的设计，以把相当复杂的建模成一个简单的和无错误的程序，通过利用一个专门设计的图形用户界面，包括组合框周围的散点图，连续显示最新的结果的岩石学模型。它使用户的程序绘制元素，元素和放射性（即Sr，Nd和Pb）和稳定（d18 O）同位素比对彼此的比率。最多可将八个数据系列输入程序并存储在八个独立的电子表格中，然后与建模的理论曲线一起沿着绘制。这使用户能够比较模拟曲线和他/她的岩浆系列所显示的趋势，从而使他/她能够对岩浆成因中地壳同化的程度做出解释和估计。该程序还有两个单独的用户可修改的表，用于存储基性、中间和酸性岩浆元素的D值，并存储多达100种岩浆/地壳端元成分，可用于建模。凭借这些功能，AFC建模程序可以作为一个有用的工具，用于研究和教育目的。
AFC-Modeler is a user-friendly, interactive Microsoft Excel workbook program which is specifically designed to model up to ten theoretical AFC curves (corresponding to ten different r values; r being the ratio of mass assimilation rate to fractional crystallization rate) for a set of variables that can be interactively and precisely modified by the user (i.e. D, initial element concentration and isotope ratio in magma and element concentration and isotope ratio in wallrock). Being able to model ten curves for ten different 'r' values is an important feature of the program, because results of many studies indicate that the r values for a magmatic suite usually vary widely instead of following a single curve. Particular care has been taken in the design of the program in order to turn rather complex modelling into a simple and error-free procedure by utilizing a specifically designed graphical user interface, consisting of combo boxes placed around a scatter chart which continuously displays up-to-date results of a petrological model. It enables the user of the program to plot elements, ratios of elements and radiogenic (i.e. Sr, Nd and Pb) and stable (d18O) isotopic ratios against each other. Up to eight data series can be entered into the program and stored on eight separate spreadsheets and then plotted along with the modelled theoretical curves. This enables the user to compare the modelled curves and the trends shown by his/her magma series and hence enables him/her to make interpretations and estimations about the degree of crustal assimilation in magma genesis. The program also has two separate and user-modifiable sheets for storing D values of the elements for basic, intermediate and acid magmas, and storing up to 100 magmatic/crustal end-member compositions, which can be utilized in the modelling. By virtue of these features, the AFC-Modeler program can be used as a useful tool for both research and educational purposes.