摘要
本文利用电子探针,分析了江苏东海毛北榴辉岩中的石榴石和单斜辉石的化学组成。利用矿物地质温度计,计算了毛北榴辉岩的成岩平衡温度。结合本区的大地构造环境,提出在早元古代末期,华北陆块曾发生向南的大型堆覆构造,苏北地区即为推覆体前缘。
With electronprobe analyses, a study is made on mineralchemistry of eclogites from Maobei of Donghai region, Jiangsu province. The formation temperature of the eclogites is calculated to be at 657-1051℃. It is proposed that the eclogites was formed by high-temperature and high-pressure at lower crust or upper mantle. It moved to the present position by the Huabei plate (the northern China plate) napping to Huanan plate (the southern China plate) at early Suberathem, with serpentine being as the lubricating countryrock when the eclogites moved up to upper crust.
出处
《海洋湖沼通报》
CSCD
北大核心
1991年第2期36-42,共7页
Transactions of Oceanology and Limnology
关键词
榴辉岩
矿物化学
成因
江苏
Eclogites
Mineral-chemistry
Jiangsu prov
nappe tectonic
