| 单立华,丁汝福,卫晓锋,潘东,裴圣良.新疆富蕴县科克别克提一带岩体SHRIMP锆石U-Pb年龄及其地质意义[J].矿产勘查,2018,9(5):777-792 |
| 新疆富蕴县科克别克提一带岩体SHRIMP锆石U-Pb年龄及其地质意义 |
| SHRIMP zircon U-Pb dating for rocks and its geological significance in Kekebieketi district of Fuyun county, Xinjiang |
| 投稿时间：2018-05-18 |
| DOI： |
| 中文关键词: 锆石U-Pb定年 岩浆结晶分异 地质背景 科克别克提—加波萨尔北构造带 新疆 |
| 英文关键词: zircon U-Pb dating, magmatic crystallization differentiation, geological background, tectonic belt of Kekebieketi-Jiabosaerbei, Xinjiang |
| 基金项目:新疆富蕴县杜热地区矿产地质调查(编号:1212011140062)和新疆富蕴县乔夏哈拉-科克别克提一带铜金矿调查评价(编号:AL4-2-LQ04)联合资助。 |
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| 中文摘要: |
| 喀拉通克基性杂岩带外围分布多个矿点,采用全岩分析及U-Pb锆石测年,分析不同矿点成岩年龄及地质背景。科克别克提杂岩体基性岩为钙碱性系列,花岗闪长岩为高钾钙碱性Ⅰ型花岗岩系列,成岩年龄为314～325 Ma；札勒岩体为低钾拉斑系列,成岩年龄(359.5±4.3) Ma；加波萨尔北岩脉为高钾钙碱性A型花岗岩系列,成岩年龄278～325 Ma。结合稀土微量元素分析表明,矿点形成于岛弧环境,分别位于斑岩型铜多金属矿带、与基性岩有关的铜镍金矿带,中—晚石炭世张性环境下分别侵入斑岩体、基性杂岩体,中二叠世经历顺时针走滑,为成岩成矿作用提供动力。 |
| 英文摘要: |
| There are numbers of ore occurrences spreading in the periphery area of the Kalatongke basic complex belt. In this paper, the whole-rock analysis and SHRIMP U-Pb isotopic dating methods are used to analyze the genetic ages and geological background of different ore occurrence. The Kekebieketi basites belong to calcium alkali series and the granodiorites are regarded as typeⅠcalc-alkaline granite with high potassium, with U-Pb age of (314-325) Ma; the Zhale rocks could be included in low potassium spot series, with U-Pb age of (359.5±4.3 ) Ma; Jiabosaerbei rocks are classified into the high potassium calc-alkaline type A granite series, with U-Pb age of (278-325 ) Ma. Combined with rare earth elements, the analysis shows that the mineralization spots are formed in island arc environment, are located on the porphyry copper polymetallic belt or copper nickel polymetallic metallogenic belt related to the basic rocks respectively. The porphyritic mass and the basic complex mass intruded in during the middle of carboniferous or late Carboniferous epoch under the extensional environment, and then experienced clockwise strike-slipping in the middle of Permian, providing power for genesis and mineralization. |
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