發(fā)布時(shí)間：2018-02-11 20:20

  本文關(guān)鍵詞： 紅柱石 礦物組合 成因 接觸熱變質(zhì)　出處：《礦物學(xué)報(bào)》2017年Z1期 　論文類型：期刊論文

【摘要】：采用偏光顯微鏡、傅里葉紅外光譜分析和X射線熒光光譜等手段對(duì)北京西山羊屎溝地區(qū)紅柱石礦物學(xué)特征以及成因進(jìn)行相關(guān)分析。研究發(fā)現(xiàn),該區(qū)紅柱石主要呈4種礦物組合存在于含礦巖石中:(1)紅柱石組合;(2)黑云母-紅柱石組合;(3)白云母/絹云母-紅柱石組合;(4)石榴子石-紅柱石組合,表明巖石變質(zhì)程度由低到高變化。紅柱石橫截面發(fā)育"X"型裂理和環(huán)帶狀顯微變形構(gòu)造,反映了紅柱石的結(jié)晶形成是與構(gòu)造變形同期進(jìn)行的。該區(qū)紅柱石形成是房山巖體侵入過(guò)程中,富硅的堿性流體侵入泥質(zhì)圍巖發(fā)生物質(zhì)交換和反應(yīng)形成的,形成溫度在500~550℃之間,壓力500MPa。
[Abstract]:The mineralogical characteristics and genesis of andalusite in Yangshigou area, Xishan, Beijing, were studied by means of polarizing microscope, Fourier transform infrared spectroscopy and X-ray fluorescence spectroscopy. The andalusite is mainly composed of 4 mineral assemblages in the ore-bearing rocks, including: (1) andalusite assemblage (2) biotite andalusite assemblage (Guan3)) Muscovite / sericite andalusite assemblage No. 4) pomegranate andalusite assemblage. This indicates that the metamorphic degree of rocks varies from low to high. The andalusite cross section is characterized by "X" type cleavage and annular microdeformed structure. The results show that the crystallization of andalusite occurred at the same time as tectonic deformation. The formation of andalusite in this area occurred during the Fangshan intrusive process, and the silicon-rich alkaline fluid intruded into the muddy surrounding rock to form material exchange and reaction, and the formation temperature was between 500 鈩，

本文編號(hào)：1503919