Experimentelle Gesteinsmetamorphose—II: Bildung von anatektischen granitischen Schmelzen bei der Metamorphose von NaCl-führenden kalkfreien Tonen
Experimentelle Gesteinsmetamorphose—II: Bildung von anatektischen granitischen Schmelzen bei der Metamorphose von NaCl-führenden kalkfreien Tonen
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实验Gesteinsmetamorphose - II：Bildung von anatektischen granitischen Schmelzen bei der Metamorphose von NaCl-führenden kalkfreien Tonen
DOI：
10.1016/0016-7037(58)90013-9
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发表时间：
1961
影响因子：
5
通讯作者：
H. Platen
中科院分区：
文献类型：
--
作者：
H. Winkler;H. Platen
在2000 atm H2O压力下，在350° C和800°C之间对添加NaCl（以允许岩石孔隙中的盐溶液）的伊利石-石英粘土进行水热和等化学处理。结果表明，在390°C以下，伊利石+高岭石+NaCl + H_2O + Ca不发生反应，而在390°C以下，伊利石+高岭石+ NaCl + H_2O + Ca生成白云母+Al_2O_3+富Ab斜长石+ HCl + H_2O。下一个反应在550°C左右进行，产生堇青石、黑云母、白云母、斜长石和石英的矿物组合;现在不存在黑云母。在此温度下，角闪岩相达到600°、625°或665°。辉石角岩相（取决于Na含量）以碱性长石、堇青石、黑云母±硅线石-莫来石、斜长石和石英组合进入;在670° C和720°C时，由含NaCl的粘土衍生的堇青石-片麻岩产生花岗岩成分和钙碱性特征的深熔熔体。由于这些熔体包括多达三分之二的以前的堇青石片麻岩，他们被认为有一个基本的花岗岩的成因。
Illite-quartz clays to which NaCl was added (to allow for saline solutions in the rock pores) were hydrothermally and isochemically treated between 350° and 800°C under 2000 atm of H2O pressure. The results are compared with the experimental metamorphism and ultrametamorphism of the NaCl-free clay.Below 390°C no reactions take place but at 390° illite + kaolinite + NaCl + H2O + Ca give muscovite + chlorite + Ab-rich plagioclase + HCl + H2O. The next reaction follows at about 550°C giving rise to the mineral assemblage cordierite, biotite, muscovite, plagioclase and quartz; chlorite is now absent. At this temperature the amphibolite facies is reached and at 600°, 625° or 665° (depending on the Na content) the pyroxen-hornfels facies is entered with the assemblage alkalifeldspar, cordierite, biotite ± sillimanite-mullite, plagioclase and quartz; muscovite is now absent.At 670° and 720°C, respectively, the cordierite-gneisses derived from the NaCl-containing clays give rise to anatectic melts of granitic composition and calc-alkaline character. Since these melts comprise up to two-thirds of the previous cordierite-gneisses they are believed to have a fundamental bearing on the genesis of granites.