栖霞宅科地区含矽线石榴黑云片岩岩石地质特征及原岩恢复

Petrological Characteristics and Original Rocks Recovering of Sillmanitebearing Garnet Biotite Schist in Zhaike Area of Qixia City

摘要:

栖霞宅科地区含矽线石榴黑云片岩是古元古代荆山群禄格庄组安吉村段主要岩性，主要造岩矿物为黑云母、石英、斜长石、钾长石、石榴子石、矽线石，岩石层位稳定，为高角闪岩相变质岩。用岩石化学和地球化学特征的方法进行判别发现，其原岩为一套化学上属中—强等分异的海相和海陆交互相沉积的粘土岩。

Abstract:

Sillmanitebearing garnet biotite schist is the major lithology of Anjicun section of Lugezhuang formation in Paleoproterozoic Jingshan group in Zhaike area of Qixia city. Its rockforming minerals include biotite ,quartz, plagioclase, kfeldspar, garnet and sillmanite. It is high amphibolite facies metamorphic rocks. By using petrochemical and geochemical characteristics, it is found that mediumstrong fractionated marine and marineterrigenous facies claystone may be its original rock.