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| 大别山超高压变质带中“脉状”榴辉岩的锆石U-Pb年龄 | |
| 引用本文： | 钱存超,汤加富,李惠民,高天山.大别山超高压变质带中“脉状”榴辉岩的锆石U-Pb年龄[J].现代地质,2004,18(1):75-79. |
| 作者姓名： | 钱存超 汤加富 李惠民 高天山 |
| 作者单位： | 1. 西北大学,地质学系,陕西,西安,710069;安徽省地质调查院,安徽,合肥,230001 2. 安徽省地质调查院,安徽,合肥,230001 3. 中国地质调查局,天津地质矿产研究所,天津,300170 4. 中国科技大学,地球和空间科学系,安徽,合肥,230026 |
| 基金项目： | 地质行业基金项目(HY979829),中国地质调查局前寒武纪研究中心项目(200113900010)。 |
| 摘 要： | 榴辉岩广泛分布于大别山超高压变质带中,出露规模大小不等,成因类型复杂,围岩类型多样,不仅产于基性、超基性岩中,还产于片麻岩、大理岩、石英硬玉岩、变质花岗岩中。对大别山超高压变质带出露的两处"脉状"榴辉岩进行锆石U Pb年龄测定,分别获得上交点年龄(858±25)Ma和(845±150)Ma,下交点年龄(249±20)Ma和(237±13)Ma,表明其原岩形成时代为新元古代,印支期发生过高压—超高压变质作用,与大别山超高压变质带中其他类型的榴辉岩年龄基本一致。 |
| 关 键 词： | 锆石 U-Pb年龄 "脉状"榴辉岩 超高压变质带 大别山 |
| 文章编号： | 1000-8527(2004)01-0075-05 |
| 修稿时间： | 2003年10月9日 |
U-Pb ZIRCON AGES OF THE VEINED ECLOGITE FROM UHPMB IN THE DABIE MOUNTAINS,ANHUI PROVINCE,CHINA |
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| QIAN Cun-chao.U-Pb ZIRCON AGES OF THE VEINED ECLOGITE FROM UHPMB IN THE DABIE MOUNTAINS,ANHUI PROVINCE,CHINA[J].Geoscience——Journal of Graduate School,China University of Geosciences,2004,18(1):75-79. | |
| Authors: | QIAN Cun-chao |
| Institution: | QIAN Cun-chao~ |
| Abstract: | Eclogites distribute in the ultra-high pressure metamorphic belts (UHPMB) in the Dabieshan Mountains,and show different scales. The eclogites have complicated petrogenesis and various host rocks.They can be found not only in basic, ultrabasic rocks, but also in gneisses, marble, quartz jadeitite and metamorphosed granitiod. The U-Pb zircon ages of two "veined" eclogites were presented from the UHPMB in the Dabieshan Mountains. The ages were (858±25)Ma, (845±150)Ma and (249±27)Ma, (237±13)Ma for upper and lower intercepts. The U-Pb data show that they were formed in Neoprterozoic Era, and underwent a Triassic high pressure-ultra-high pressure metamorphism,which are similar to the ages of the other types of eclogites form UHPMB in the Dabie Mountains. |
| Keywords: | zircon U-Pb age veined eclogite UHPMB the Dabie Mountains |
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