CAJ | 학술논문

黑龙江东部穆棱地区一带的麻山群中分布有角闪黑云花岗质片麻岩和眼球状黑云母花岗片麻岩，以往将其作为麻山群的组成部分，本次研究表明它们是受变质和变形改造的正片麻岩。采用LA‐ICP‐MS技术对角闪黑云花岗质片麻岩进行了锆石U‐Pb年龄测定，测定样品锆石206 Pb ／238 U 加权平均年龄为892．0±3Ma（ n ＝18，MSWD ＝4．2），该年龄解释为花岗质岩浆的结晶年龄。892Ma左右花岗质片麻岩的发现，证实佳木斯地块存在前寒武纪结晶基底，这一发现为恢复该地区的构造格架，确定原麻山群的构造属性提供了新的线索，具有重要的地质意义。
흑룡강동부목릉지구일대적마산군중분포유각섬흑운화강질편마암화안구상흑운모화강편마암，이왕장기작위마산군적조성부분，본차연구표명타문시수변질화변형개조적정편마암。채용LA‐ICP‐MS기술대각섬흑운화강질편마암진행료고석U‐Pb년령측정，측정양품고석206 Pb ／238 U 가권평균년령위892．0±3Ma（ n ＝18，MSWD ＝4．2），해년령해석위화강질암장적결정년령。892Ma좌우화강질편마암적발현，증실가목사지괴존재전한무기결정기저，저일발현위회복해지구적구조격가，학정원마산군적구조속성제공료신적선색，구유중요적지질의의。
Hornblende‐biotite granite gneisses and augen biotite granite gneisse‐s, which spr‐ead in the Muleng area, eastern of Heilongjiang Province, were used to think as parts of Manshan Group. Though, the study has showed that they areorthogneiss experienced Meta‐morphism and deformation. We measured the U‐Pb zircon age of the hornblende‐biotite gran‐ite gneisses by LA‐ICP‐MS technology. The weighted average of 206 Pb/238U of zircon sample is 892. 0 ± 3Ma(n=18, MSWD=4. 2). Which can be explained as the age of the granitic magma. The discovery of granite gneisses aged rough 892Ma, proves that Jiamusi Missif exists Precambrian crystalline basement. Which provides a new clue to reform the t‐ectonic framework of this area and the tectonic attribute of Manshan Group.