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2022, 41(1) 15-25 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Geochronology and geochemical characteristics of volcanic rocks of Manketou-ebo Formation in Gaodi forest farm,northern GreatXing‘an Range,and their tectonic implications |
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YUXihuan1 ,LIXinpeng1 ,LIZhonghui1 ,CHENXufeng2 ,YINGuoliang1 ,LIChenglu1 ,WANGEnbao1 |
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１ＮａｔｕｒａｌＲｅｓｏｕｒｃｅｓＳｕｒｖｅｙＩｎｓｔｉｔｕｔｅｏｆＨｅｉｌｏｎｇｊｉａｎｇＰｒｏｖｉｎｃｅ，Ｈａｒｂｉｎ１５００３６，Ｃｈｉｎａ；
２ＨｅｉｌｏｎｇｊｉａｎｇＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃａｌａｎｄＧｅｏｃｈｅｍｉｃａｌＥｘｐｌｏｒａｔｉｏｎ，Ｈａｒｂｉｎ１５００３６，Ｃｈｉｎａ |
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Abstract：
ＬＡ-ＩＣＰ-ＭＳｚｉｒｃｏｎＵ-Ｐｂｄａｔｉｎｇａｎｄｗｈｏｌｅｒｏｃｋｇｅｏｃｈｅｍｉｓｔｒｙｗｅｒｅｃｏｎｄｕｃｔｅｄｆｏｒｔｈｅｖｏｌｃａｎｉｃ ｒｏｃｋｓｏｆＭａｎｋｅｔｏｕｅｂｏＦｏｒｍａｔｉｏｎｉｎｔｈｅＧａｏｄｉｆｏｒｅｓｔｆａｒｍａｒｅａ，ｎｏｒｔｈｅｒｎＧｒｅａｔＸｉｎｇａｎＲａｎｇｅ，ｗｉｔｈｔｈｅａｉｍｓｏｆ ｃｏｎｓｔｒａｉｎｉｎｇｔｈｅｉｒｐｅｔｒｏｇｅｎｅｓｉｓａｎｄｔｅｃｔｏｎｉｃｓｅｔｔｉｎｇ．Ｔｈｅｄａｔｉｎｇｒｅｓｕｌｔｓｓｈｏｗｔｈａｔｔｈｅｅｒｕｐｔｉｖｅａｇｅｏｆｔｈｅｖｏｌｃａｎｉｃ ｒｏｃｋｉｓ（１４９±１）Ｍａ，ｉｅ．ＬａｔｅＪｕｒａｓｓｉｃ．Ｉｎｔｅｒｍｓｏｆｇｅｏｃｈｅｍｉｃａｌｃｈａｒａｃｔｅｒｉｓｔｉｃｓ，ｔｈｅｓｔｕｄｉｅｄｓａｍｐｌｅｓａｒｅｃｈａｒａｃｔｅｒｉｚｅｄｂｙｈｉｇｈｓｉｌｉｃｏｎ，ｒｉｃｈａｌｋａｌｉ，ｐｏｏｒｃａｌｃｉｕｍ，ａｎｄｐｏｏｒｍａｇｎｅｓｉｕｍ，ｂｅｌｏｎｇｉｎｇｔｏｈｉｇｈｐｏｔａｓｓｉｕｍｃａｌｃａｌｋａｌｉｎｅ ｗｅａｋｐｅｒａｌｕｍｉｎｏｕｓｒｏｃｋｓ．Ｔｈｅｙｈａｖｅｔｏｔａｌｒａｒｅｅａｒｔｈｅｌｅｍｅｎｔ（ΣＲＥＥ）ｃｏｎｔｅｎｔｓｏｆ１２４３２×１０－６～１８９４１×１０－６ ａｎｄＬＲＥＥ／ＨＲＥＥｒａｔｉｏｓｏｆ８７２～１６３５，ｉｎｄｉｃａｔｉｎｇａｓｉｇｎｉｆｉｃａｎｔｆｒａｃｔｉｏｎａｔｉｏｎｂｅｔｗｅｅｎＬＲＥＥａｎｄＨＲＥＥ．Ｔｈｅｉｒ ｍａｇｍａｓｏｒｉｇｉｎａｔｅｄｆｒｏｍｔｈｅｐａｒｔｉａｌｍｅｌｔｉｎｇｏｆｓｈａｌｌｏｗｃｒｕｓｔａｌｍａｔｅｒｉａｌｓ．Ｃｏｍｂｉｎｅｄｗｉｔｈｒｅｇｉｏｎａｌｇｅｏｌｏｇｉｃａｌｂａｃｋｇｒｏｕｎｄ，ｔｈｅａｕｔｈｏｒｓｐｒｏｐｏｓｅｔｈａｔｔｈｅｖｏｌｃａｎｉｃｒｏｃｋｓｏｆｔｈｅＭａｎｋｅｔｏｕｅｂｏＦｏｒｍａｔｉｏｎｗｅｒｅｆｏｒｍｅｄｉｎｔｈｅｐｏｓｔｏｒｏｇｅｎｉｃ ｅｘｔｅｎｓｉｏｎａｌｓｅｔｔｉｎｇａｆｔｅｒｔｈｅｃｌｏｓｕｒｅｏｆＭｏｎｇｏｌｉａ-ＯｋｈｏｔｓｋＯｃｅａｎ． |
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Keywords：
ＭａｎｋｅｔｏｕｅｂｏＦｏｒｍａｔｉｏｎ
ｖｏｌｃａｎｉｃｒｏｃｋｓ
ｇｅｏｃｈｅｍｉｓｔｒｙ
ｚｉｒｃｏｎＵＰｂｄａｔｉｎｇ
ｎｏｒｔｈｅｒｎＧｒｅａｔ ＸｉｎｇａｎＲａｎｇ
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