| 张培强,万志博,马宇.苏鲁—大别榴辉岩研究:形成于不同地质时期的高压-超高压变质带[J].地质找矿论丛,2006,(4):270-276 |
| 苏鲁—大别榴辉岩研究:形成于不同地质时期的高压-超高压变质带 |
| STUDY ON THE SULU-DABIE ECLOGITE:HIGH-ULTRA HIGH PRESSURE METAMORPHIC BELT FORMED AT DIFFERENT AGES |
| 投稿时间：2005-05-13 修订日期：2006-03-28 |
| DOI：10.6053/j.issn.1001-1412.2006.4. 009 |
| 中文关键词: 胶东 郯庐 大别 榴辉岩 高压-超高压变质带 同位素年龄 |
| 英文关键词:Jiaodong Tanlu Dabie eclogite high-ultra high pressure metamorphic belt isotopes ages |
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| 中文摘要: |
| 含柯石英的苏鲁—大别榴辉岩是高压-超高压变质带的产物。依据榴辉岩的总体展布方向、岩石特征、高压-超高压变质作用及退变质作用的温压条件,可划分为NEE向胶东高压-超高压变质带、NNE向郯庐高压-超高压变质带和SEE向大别高压-超高压变质带。榴辉岩的同位素年龄值指示这3个带是主压应力方向不同、形成时期不同、发展和终止时期也各不相同的3个高压-超高压变质带。NEE向胶东高压-超高压变质带主要形成于700~900Ma的晋宁期,终止于200Ma左右的印支期;SEE向大别高压-超高压变质带主要形成于400~500Ma的加里东期,终止于250Ma左右的印支期;NNE向郯庐高压-超高压变质带初期曾经与胶东高压-超高压变质带是一个带,最早形成于900Ma左右的晋宁期,但其最重要的形成期是200Ma左右的印支期,55Ma左右的喜马拉雅期该带进入推覆造山阶段。胶东、大别和早期的郯庐高压-超高压变质带的主压应力方向都是近SN向,印支期之后的郯庐高压-超高压变质带主压应力方向转变为近EW向。 |
| 英文摘要: |
| The Sulu-Dabie eclogite,which contains cosine,is the product of high-ultra high pressure metamorphism.Based on the distribution,rock characteristics,p-t condition the Sulu-Dabie high-ultra high pressure metamorphic belt can be compartmentalized into three,i.e.the NEE Jiaodong high-ultra high pressure metamorphic belt,the NNE Tanlu high-ultra high pressure metamorphic belt and the SEE Dabie high-ultra high pressure metamorphic belt.isotopic age values of the three belts show that they are varied in the main compressional stress direction,age of formation and development and termination time.The NEE Jiaodong high-ultra high pressure metamorphic belt was formed in Jinning Epoch of 700-900million year and terminated at 200 million years ago in Indosinian Epoch;the SEE Dabie high-ultra high pressure metamorphic belt in Caledonian Epoch of 400-500 million year and 250 million years ago in Indosinian Epoch;the NNE Tanlu high-ultra high pressure metamorphic belt and the NEE Jiaodong high-ultra high pressure metamorphic belt was the same belt at first and primarily formed from 900 million years ago in Jinning Epoch but it was mainly formed at about 200 million year in Indosinian Epoch and at about 55 million year it entered in thrusting orogenic stage.The main stress of Jiaodong,Dabie and the early Tanlu highultra high pressure metamorphic belt were all in SN direction but it turned to EW direction after Indosinian Epoch. |
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