Late Mesozoic Magmatic Activities and Their Constraints on Geotectonics of Jiaodong Region

详细信息   

• 责任者：Qiu Liangui (Institute of Geological Science ; SINOPEC Shengli Oilfield Company ; Dongying 257015 ; China) ; Ren Fenglou
• 刊名：Geotectonica et Metallogenia
• 出版年：2008
• 卷期：32(1)
• 关键词：岩浆活动 ; igneous activity ; 山东 ; Shandong
• 页码：p.117-123
• 图表：4 illus., 2 tables, 22 refs.
• 分类号：0801
• issnNo：ISSN1001-1552
• isbnNo：CN43-1595/P

摘要

///Based on isotope dating data of igneous rocks by previous studies in the past decade and zircon SHRIMP U-Pb dating of Yashan granite (117.7 Ma), Yuangezhuang granite (113.4 Ma), synite porphyry veins (115.7 Ma), this paper studied magma activities in the Jiaolai basin and adjacent regions since the Late Mesozoic. The regional isotope dating data suggested four tectonic-thermal events (magma activities): 1) Late Jurassic (150~160 Ma) Linglong-Luanjiahe granite period, belonging to the syn-tectonic period dominated by compressive stress; 2) earlier Early Cretaceous (135~125 Ma) Guojialing granite period, controlled by the extension setting; 3) middle-late Early Cretaceous (125~105 Ma) Laoshan granite period, corresponding to the large scale lithosphere thinning; and 4) Late Cretaceous-Paleocene basic-ultrabasic magma activities. Geodynamic factors for the magma activities and their constraints on regional tectonics are also discussed in this paper.