地质通报2016，Vol.35Issue(6)：1015-1024,10.
皖南印支期石英斑岩的首次发现及其构造意义
The first discovery of Indosinian quartz porphyry in Dongkengkou Village, southern An-hui Province
摘要
Abstract
It is generally thought that both tectonic events and magmatic activities during the Indosinian period were intense in south⁃eastern China. In contrast, the Indosinian magmatic activities in southern Anhui area were generally not considered to be existent, be⁃cause there was not any previous reported Indosinian intrusive rock in this area. In this paper, the authors obtained LA-ICP-MS zir⁃con U-Pb weighted average age of 245.2±2.4Ma for the quartz porphyry dyke from the side of x046 highway, about 500m north of Dongkengkou Village, Huizhou District, Huangshan City, southern Anhui Province, which implys that the Dongkengkou quartz por⁃phyry (DQP) was formed during Indosinian period rather than in Yanshanian period. The bulk-rock chemical data indicate that the DQP is enriched with LILE, LREE and depleted in high field-strength elements Ba, Sr, P, Ti, and possesses high 10000×Ga/Al ra⁃tios and high Zr, Nb, Ce and Y values. Petrologically, the DQP has hypidiomorphic quartz and plagioclase, exhibiting A-type gran⁃ite characteristics. The confirmation of the Indosinian A-type granite from southern Anhui area provides new scientific evidence for understanding the regional tectono-magmatism history, and finally supplies extra evidence for remodeling the tectonic and geody⁃namic evolution of southeast China.关键词
LA-ICP-MS锆石U-Pb年龄/印支期/东坑口/石英斑岩/皖南Key words
LA-ICP-MS zircon U-Pb age/Indosinian/Dongkengkou/quartz porphyry/southern Anhui area分类
天文与地球科学引用本文复制引用
刘秀,余心起,李鹏举,陈子微..皖南印支期石英斑岩的首次发现及其构造意义[J].地质通报,2016,35(6):1015-1024,10.基金项目
国家自然科学基金项目 （）
