

地学前缘 ›› 2026, Vol. 33 ›› Issue (2): 290-310.DOI: 10.13745/j.esf.sf.2025.1.12
曹玉召1,2(
), 吴玉2, 钟军2, 朱斌2, 韩长城1,*(
), 马静辉1, 林陈雨2,3, 何中波2, 冀华丽2, 东前2, 郭子欣2
收稿日期:2024-05-16
修回日期:2025-01-21
出版日期:2026-03-25
发布日期:2026-01-29
通信作者:
韩长城(1984—),男,教授,主要从事石油地质及储层特征研究。E-mail: 作者简介:曹玉召(1999—),男,硕士研究生,地质资源与地质工程专业。E-mail: cao15230112600@163.com
基金资助:
CAO Yuzhao1,2(
), WU Yu2, ZHONG Jun2, ZHU Bin2, HAN Changcheng1,*(
), MA Jinghui1, LIN Chenyu2,3, HE Zhongbo2, JI Huali2, DONG Qian2, GUO Zixin2
Received:2024-05-16
Revised:2025-01-21
Online:2026-03-25
Published:2026-01-29
摘要:
蚀源区铀源的分析和评价对沉积盆地中砂岩型铀矿的勘查具有重要意义。本研究聚焦于准噶尔盆地中北部地区,通过对蚀源区岩浆岩的铀含量特征、锆石U-Pb年龄分布和Hf同位素组成特征分析,探讨蚀源区岩浆岩时空分布特征、铀源条件以及有利铀源的岩浆岩特征,进而为准噶尔盆地中北部砂岩型铀矿找矿预测提供了源区评价依据。分析结果表明,准噶尔盆地中北部蚀源区富铀地质体的岩浆活动期次主要集中在奥陶纪、晚志留世—晚泥盆世和早石炭世—晚二叠世,其次为早侏罗世。在空间分布上,蚀源区富铀地质体的铀含量和供铀能力呈现出“自北向南减小、东高西低”的趋势。阿尔泰造山带中段和东准噶尔的野马泉岛弧带具有较高的供铀能力,而西准噶尔造山带的铀含量相对较低。在岩浆岩类型上,蚀源区古铀含量最高和供铀能力最强的岩体为酸性侵入岩,其次为碱性岩和酸性喷出岩,最后是中基性岩浆岩;在岩石成因上,S型的花岗岩较A型和I型花岗岩具有更好的铀源条件;另外,锆石Hf同位素特征显示,壳源岩浆岩相较于幔源岩浆岩更为富铀。因此,多种因素的叠加促使了有利铀源的形成。最后,根据有利铀源的分布和盆地内已知铀矿化信息,提出准噶尔盆地东部卡姆斯特地区、库普盆地西北缘、福津盆地北部以及和什托洛盖盆地北部具有较好的砂岩型铀矿的成矿潜力。
中图分类号:
曹玉召, 吴玉, 钟军, 朱斌, 韩长城, 马静辉, 林陈雨, 何中波, 冀华丽, 东前, 郭子欣. 准噶尔盆地中北部蚀源区岩浆岩时空分布特征与铀源条件分析[J]. 地学前缘, 2026, 33(2): 290-310.
CAO Yuzhao, WU Yu, ZHONG Jun, ZHU Bin, HAN Changcheng, MA Jinghui, LIN Chenyu, HE Zhongbo, JI Huali, DONG Qian, GUO Zixin. Analysis of the spatiotemporal distribution characteristics of magmatic rocks and uranium source conditions in the erosion source area of the Central and Northern Junggar Basin, China[J]. Earth Science Frontiers, 2026, 33(2): 290-310.
图1 准噶尔盆地区域地质概况 a—中亚造山带及邻区大地构造位置图(据文献[32]);b—准噶尔盆地中北部地区地质简图(构造分区据文献[40-42])。F1—红山嘴—诺尔特断裂;F2—康布铁堡—库尔特断裂;F3—额尔齐斯断裂带;F4—南萨吾尔断裂;F5—谢米斯台断裂;F6—巴尔雷克断裂;F7—玛依勒断裂;F8—达拉布特断裂;F9—阿尔曼太断裂;F10—卡拉麦里断裂。
Fig.1 Regional geological overview of the Junggar Basin
图2 准噶尔盆地中北部蚀源区中酸性侵入岩锆石U-Pb年龄分布特征
Fig.2 Distribution characteristics of zircon U-Pb ages of neutral acidic intrusive rocks in the erosion source area in the central and northern Junggar Basin
图3 准噶尔盆地中北部蚀源区岩浆岩锆石U-Pb年龄频率分布图
Fig.3 Zircon U-Pb age frequency distribution map of magmatic rocks in the erosion source area in the central and northern Junggar Basin
图5 准噶尔盆地中北部蚀源区岩浆岩锆石εHf(t)值分布特征
Fig.5 Distribution characteristics of zircon εHf(t) of magmatic rocks in the erosion source area in the central and northern the Junggar Basin
| 地区 | 富铀岩浆岩类型 | 地球化学特征 | U0/10-6 | 平均ΔU/10-6 | 锆石εHf(t) | |
|---|---|---|---|---|---|---|
| 阿尔泰 造山带 | 阿尔泰 造山带北段 | 花岗闪长岩、(片麻状)二长花岗岩、流纹岩 | S型和I型 | 4.79~5.52 (5.11) | 2.31 | -2.05~12.57 (5.94) |
| 阿尔泰 造山带中段 | (英安质)流纹岩、钾长花岗岩、(片麻状)二长花岗岩、淡色花岗岩、(片麻状)黑云母花岗岩、花岗闪长岩、英云闪长岩、(花岗)伟晶岩 | S型和I型为主, 其次为A型 | 4.54~16.98 (7.28) | 4.57 | -22.18~15.89 (4.89) | |
| 阿尔泰 造山带南段 | 碱长花岗岩、黑云母花岗岩、正长花岗岩、流纹斑岩、二长花岗岩 | I型和A型 | 4.60~7.31 (5.72) | 2.55 | -3.89~15.49 (5.60) | |
| 西准噶尔 造山带 | 萨吾尔 岛弧带 | 流纹岩、安山岩、碱性花岗岩、二长花岗岩 | I型和A型 | 1.93~2.88 (2.48) | 0.47 | 6.95~15.56 (12.99) |
| 成吉斯 岛弧带 | 碱性花岗岩、流纹岩、流纹斑岩、英安岩、二长花岗岩、钾长花岗岩、花岗斑岩 | A型为主, 其次为I型 | 4.62~6.86 (5.22) | 1.92 | 3.20~15.40 (11.15) | |
| 达拉布特 岛弧带 | 碱长花岗岩、流纹岩、石英闪长岩、二长花岗岩、钾长花岗岩 | A型为主, 其次为I型 | 4.55~6.38 (5.54) | 0.80 | 1.13~15.70 (13.09) | |
| 东准噶尔 造山带 | 杜拉特 岛弧带 | 钾长花岗岩、二长花岗岩、碱性花岗岩、流纹岩、花岗斑岩、花岗闪长岩、石英闪长岩 | I型和A型 | 4.62~8.29 (5.68) | 3.37 | 1.50~22.70 (12.67) |
| 野马泉 岛弧带 | 黑云母花岗岩、碱长花岗岩、二长花岗岩、粗粒花岗岩、火山碎屑岩、钾长花岗岩、流纹斑岩、花岗斑岩 | A型为主, 其次为I型 | 4.54~14.07 (8.98) | 5.06 | 2.20~18.80 (12.52) | |
| 将军庙地块 | 钾长花岗岩、流纹岩、玻屑凝灰岩、碱长花岗岩、碱长花岗斑岩 | A型为主, 其次为I型 | 1.89~4.07 (2.77) | 0.51 | 1.90~18.70 (12.09) | |
表1 准噶尔盆地中北部蚀源区富铀地质体岩浆岩特征
Table 1 Characteristics of magmatic rocks of uranium rich geological bodies in the erosion source area in the central and northern Junggar Basin
| 地区 | 富铀岩浆岩类型 | 地球化学特征 | U0/10-6 | 平均ΔU/10-6 | 锆石εHf(t) | |
|---|---|---|---|---|---|---|
| 阿尔泰 造山带 | 阿尔泰 造山带北段 | 花岗闪长岩、(片麻状)二长花岗岩、流纹岩 | S型和I型 | 4.79~5.52 (5.11) | 2.31 | -2.05~12.57 (5.94) |
| 阿尔泰 造山带中段 | (英安质)流纹岩、钾长花岗岩、(片麻状)二长花岗岩、淡色花岗岩、(片麻状)黑云母花岗岩、花岗闪长岩、英云闪长岩、(花岗)伟晶岩 | S型和I型为主, 其次为A型 | 4.54~16.98 (7.28) | 4.57 | -22.18~15.89 (4.89) | |
| 阿尔泰 造山带南段 | 碱长花岗岩、黑云母花岗岩、正长花岗岩、流纹斑岩、二长花岗岩 | I型和A型 | 4.60~7.31 (5.72) | 2.55 | -3.89~15.49 (5.60) | |
| 西准噶尔 造山带 | 萨吾尔 岛弧带 | 流纹岩、安山岩、碱性花岗岩、二长花岗岩 | I型和A型 | 1.93~2.88 (2.48) | 0.47 | 6.95~15.56 (12.99) |
| 成吉斯 岛弧带 | 碱性花岗岩、流纹岩、流纹斑岩、英安岩、二长花岗岩、钾长花岗岩、花岗斑岩 | A型为主, 其次为I型 | 4.62~6.86 (5.22) | 1.92 | 3.20~15.40 (11.15) | |
| 达拉布特 岛弧带 | 碱长花岗岩、流纹岩、石英闪长岩、二长花岗岩、钾长花岗岩 | A型为主, 其次为I型 | 4.55~6.38 (5.54) | 0.80 | 1.13~15.70 (13.09) | |
| 东准噶尔 造山带 | 杜拉特 岛弧带 | 钾长花岗岩、二长花岗岩、碱性花岗岩、流纹岩、花岗斑岩、花岗闪长岩、石英闪长岩 | I型和A型 | 4.62~8.29 (5.68) | 3.37 | 1.50~22.70 (12.67) |
| 野马泉 岛弧带 | 黑云母花岗岩、碱长花岗岩、二长花岗岩、粗粒花岗岩、火山碎屑岩、钾长花岗岩、流纹斑岩、花岗斑岩 | A型为主, 其次为I型 | 4.54~14.07 (8.98) | 5.06 | 2.20~18.80 (12.52) | |
| 将军庙地块 | 钾长花岗岩、流纹岩、玻屑凝灰岩、碱长花岗岩、碱长花岗斑岩 | A型为主, 其次为I型 | 1.89~4.07 (2.77) | 0.51 | 1.90~18.70 (12.09) | |
| 地区 | 岩性 | U含量/10-6 | K值 | 平均ΔU/10-6 | U0/10-6 | 评价 | |
|---|---|---|---|---|---|---|---|
| 阿尔泰造山带 | 阿尔泰 造山带北段 | 酸性侵入岩 | 1.02~3.41(2.00) | 5.15~18.64(8.66) | 1.61 | 1.40~5.52(3.61) | 中等 |
| 中基性侵入岩 | 0.54~3.11(1.50) | 3.98~27.04(9.76) | 1.41 | 1.60~3.88(2.67) | 中等 | ||
| 中基性喷出岩 | 0.21~0.34(0.28) | 1.97~2.29(2.13) | 0.00 | 0.11~0.16(0.14) | 贫 | ||
| 阿尔泰 造山带中段 | 酸性侵入岩 | 0.91~6.67(2.55) | 0.67~30.97(9.30) | 2.83 | 1.07~16.98(5.06) | 富 | |
| 酸性喷出岩 | 1.84~3.53(2.66) | 4.29~7.03(4.91) | 0.41 | 2. 21~4.83(3.08) | 中等 | ||
| 中基性侵入岩 | 0.17~3.65(1.34) | 1.88~23.02(8.42) | 2.11 | 0.37~7.95(3.21) | 中等 | ||
| 中基性喷出岩 | 0.02~0.59(0.25) | 0.25~6.25(2.06) | 0.01 | 0.01~0.23(0.11) | 贫 | ||
| 碱性岩 | 1.10~3.53(1.93) | 1.00~14.67(6.20) | 3.34 | 5.24~6.48(5.86) | 富 | ||
| 阿尔泰 造山带南段 | 酸性侵入岩 | 0.71~4.68(2.72) | 5.77~20.70(10.89) | 2.59 | 3.50~7.31(5.31) | 富 | |
| 酸性喷出岩 | 1.66~1.72(1.69) | 9.04~10.12(9.56) | 3.85 | 3.57~4.07(3.85) | 中等 | ||
| 中基性侵入岩 | 0.34~2.12(1.17) | 2.26~6.88(4.89) | 0.36 | 0.38~2.36(1.42) | 中等 | ||
| 中基性喷出岩 | 0.06~2.11(0.88) | 0.04~6.35(2.38) | 0.07 | 0.07~1.55(0.58) | 贫 | ||
| 碱性岩 | 2.78~4.19(3.38) | 5.77~6.95(6.50) | 1.78 | 4.60~5.75(5.16) | 富 | ||
| 西准噶尔造山带 | 萨吾尔 岛弧带 | 酸性喷出岩 | 2.22~2.46(2.34) | 4.51~5.45(4.98) | 0.42 | 2.64~2.88(2.76) | 中等 |
| 中基性喷出岩 | 0.04~1.36(0.49) | 1.25~5.96(3.02) | 0.04 | 0.04~1.93(0.55) | 贫 | ||
| 成吉斯 岛弧带 | 酸性侵入岩 | 1.06~5.26(2.26) | 4.62~15.75(7.36) | 1.50 | 2.20~6.86(3.76) | 中等 | |
| 酸性喷出岩 | 2.20~4.14(3.11) | 4.84~6.77(5.70) | 1.04 | 2.88~4.98(4.15) | 中等 | ||
| 中基性侵入岩 | 0.10~4.60(1.57) | 1.68~11.82(4.72) | 0.29 | 0.14~4.74(1.85) | 中等 | ||
| 中基性喷出岩 | 0.11~3.23(1.35) | 1.12~5.35(3.10) | 0.13 | 0.18~2.70(1.07) | 贫 | ||
| 碱性岩 | 1.38~5.26(2.74) | 4.48~11.30(7.06) | 1.68 | 1.67~6.86(4.43) | 中等 | ||
| 达拉布特 岛弧带 | 酸性侵入岩 | 0.70~5.66(1.90) | 4.50~8.61(5.85) | 0.59 | 1.11~6.38(2.49) | 中等 | |
| 酸性喷出岩 | 2.50~3.52(3.04) | 5.43~6.20(5.68) | 1.06 | 3.58~4.57(4.10) | 中等 | ||
| 中基性侵入岩 | 0.04~3.48(1.08) | 0.33~7.42(3.60) | 0.14 | 0.04~2.67(1.05) | 贫 | ||
| 中基性喷出岩 | 0.01~1.83(0.56) | 0.82~6.60(2.87) | 0.02 | 0.01~2.36(0.41) | 贫 | ||
| 碱性岩 | 0.79~5.66(2.24) | 2.46~6.97(4.87) | 0.38 | 0.74~6.38(2.45) | 中等 | ||
| 东准噶尔造山带 | 杜拉特 岛弧带 | 酸性侵入岩 | 0.80~4.00(1.79) | 6.75~36.30(11.93) | 2.74 | 2.76~8.29(4.53) | 富 |
| 酸性喷出岩 | 1.20~3.21(2.57) | 4.20~5.07(4.51) | 0.22 | 1.24~3.29(2.76) | 中等 | ||
| 中基性侵入岩 | 0.06~3.80(1.29) | 0.66~21.60(4.15) | 0.32 | 0.06~5.14(1.24) | 贫 | ||
| 中基性喷出岩 | 0.34~3.74(1.40) | 0.72~21.88(2.95) | 0.12 | 0.43~4.64(0.93) | 贫 | ||
| 碱性岩 | 0.80~4.00(1.72) | 3.50~21.60(10.67) | 2.47 | 0.76~8.29(4.02) | 中等 | ||
| 野马泉 岛弧带 | 酸性侵入岩 | 1.44~6.92(3.77) | 5.97~17.15(9.78) | 4.79 | 3.02~14.07(8.56) | 富 | |
| 酸性喷出岩 | 1.64~2.83(2.04) | 4.34~8.01(6.79) | 1.02 | 2.93~3.13(3.06) | 中等 | ||
| 中基性侵入岩 | 0.12~4.29(1.19) | 0.41~8.88(3.29) | 0.08 | 0.13~2.86(1.11) | 贫 | ||
| 中基性喷出岩 | 0.08~6.12(1.68) | 0.45~25.36(3.60) | 0.03 | 0.36~4.07(1.17) | 贫 | ||
| 碱性岩 | 0.08~6.14(2.89) | 2.90~25.36(8.86) | 3.35 | 0.51~12.50(5.74) | 富 | ||
| 将军庙 地块 | 酸性侵入岩 | 1.83~2.70(2.17) | 4.76~6.61(5.35) | 0.58 | 2.45~3.50(2.75) | 中等 | |
| 酸性喷出岩 | 3.11~3.90(3.38) | 4.38~4.90(4.67) | 0.36 | 3.52~4.07(3.74) | 中等 | ||
| 中基性侵入岩 | 0.32~2.24(1.06) | 3.17~8.88(4.43) | 0.14 | 0.32~2.94(1.16) | 贫 | ||
| 中基性喷出岩 | 0.57~0.98(0.72) | 3.17~3.69(3.38) | 0.00 | 0.46~0.86(0.58) | 贫 | ||
| 碱性岩 | 1.83~2.70(2.24) | 4.76~6.61(5.47) | 0.65 | 2.60~3.50(2.89) | 中等 | ||
表2 准噶尔盆地中北部地区蚀源区岩浆岩铀含量及相关数值一览表
Table 2 List of uranium content and related values of magmatic rocks in the erosion source area in the central and northern Junggar Basin
| 地区 | 岩性 | U含量/10-6 | K值 | 平均ΔU/10-6 | U0/10-6 | 评价 | |
|---|---|---|---|---|---|---|---|
| 阿尔泰造山带 | 阿尔泰 造山带北段 | 酸性侵入岩 | 1.02~3.41(2.00) | 5.15~18.64(8.66) | 1.61 | 1.40~5.52(3.61) | 中等 |
| 中基性侵入岩 | 0.54~3.11(1.50) | 3.98~27.04(9.76) | 1.41 | 1.60~3.88(2.67) | 中等 | ||
| 中基性喷出岩 | 0.21~0.34(0.28) | 1.97~2.29(2.13) | 0.00 | 0.11~0.16(0.14) | 贫 | ||
| 阿尔泰 造山带中段 | 酸性侵入岩 | 0.91~6.67(2.55) | 0.67~30.97(9.30) | 2.83 | 1.07~16.98(5.06) | 富 | |
| 酸性喷出岩 | 1.84~3.53(2.66) | 4.29~7.03(4.91) | 0.41 | 2. 21~4.83(3.08) | 中等 | ||
| 中基性侵入岩 | 0.17~3.65(1.34) | 1.88~23.02(8.42) | 2.11 | 0.37~7.95(3.21) | 中等 | ||
| 中基性喷出岩 | 0.02~0.59(0.25) | 0.25~6.25(2.06) | 0.01 | 0.01~0.23(0.11) | 贫 | ||
| 碱性岩 | 1.10~3.53(1.93) | 1.00~14.67(6.20) | 3.34 | 5.24~6.48(5.86) | 富 | ||
| 阿尔泰 造山带南段 | 酸性侵入岩 | 0.71~4.68(2.72) | 5.77~20.70(10.89) | 2.59 | 3.50~7.31(5.31) | 富 | |
| 酸性喷出岩 | 1.66~1.72(1.69) | 9.04~10.12(9.56) | 3.85 | 3.57~4.07(3.85) | 中等 | ||
| 中基性侵入岩 | 0.34~2.12(1.17) | 2.26~6.88(4.89) | 0.36 | 0.38~2.36(1.42) | 中等 | ||
| 中基性喷出岩 | 0.06~2.11(0.88) | 0.04~6.35(2.38) | 0.07 | 0.07~1.55(0.58) | 贫 | ||
| 碱性岩 | 2.78~4.19(3.38) | 5.77~6.95(6.50) | 1.78 | 4.60~5.75(5.16) | 富 | ||
| 西准噶尔造山带 | 萨吾尔 岛弧带 | 酸性喷出岩 | 2.22~2.46(2.34) | 4.51~5.45(4.98) | 0.42 | 2.64~2.88(2.76) | 中等 |
| 中基性喷出岩 | 0.04~1.36(0.49) | 1.25~5.96(3.02) | 0.04 | 0.04~1.93(0.55) | 贫 | ||
| 成吉斯 岛弧带 | 酸性侵入岩 | 1.06~5.26(2.26) | 4.62~15.75(7.36) | 1.50 | 2.20~6.86(3.76) | 中等 | |
| 酸性喷出岩 | 2.20~4.14(3.11) | 4.84~6.77(5.70) | 1.04 | 2.88~4.98(4.15) | 中等 | ||
| 中基性侵入岩 | 0.10~4.60(1.57) | 1.68~11.82(4.72) | 0.29 | 0.14~4.74(1.85) | 中等 | ||
| 中基性喷出岩 | 0.11~3.23(1.35) | 1.12~5.35(3.10) | 0.13 | 0.18~2.70(1.07) | 贫 | ||
| 碱性岩 | 1.38~5.26(2.74) | 4.48~11.30(7.06) | 1.68 | 1.67~6.86(4.43) | 中等 | ||
| 达拉布特 岛弧带 | 酸性侵入岩 | 0.70~5.66(1.90) | 4.50~8.61(5.85) | 0.59 | 1.11~6.38(2.49) | 中等 | |
| 酸性喷出岩 | 2.50~3.52(3.04) | 5.43~6.20(5.68) | 1.06 | 3.58~4.57(4.10) | 中等 | ||
| 中基性侵入岩 | 0.04~3.48(1.08) | 0.33~7.42(3.60) | 0.14 | 0.04~2.67(1.05) | 贫 | ||
| 中基性喷出岩 | 0.01~1.83(0.56) | 0.82~6.60(2.87) | 0.02 | 0.01~2.36(0.41) | 贫 | ||
| 碱性岩 | 0.79~5.66(2.24) | 2.46~6.97(4.87) | 0.38 | 0.74~6.38(2.45) | 中等 | ||
| 东准噶尔造山带 | 杜拉特 岛弧带 | 酸性侵入岩 | 0.80~4.00(1.79) | 6.75~36.30(11.93) | 2.74 | 2.76~8.29(4.53) | 富 |
| 酸性喷出岩 | 1.20~3.21(2.57) | 4.20~5.07(4.51) | 0.22 | 1.24~3.29(2.76) | 中等 | ||
| 中基性侵入岩 | 0.06~3.80(1.29) | 0.66~21.60(4.15) | 0.32 | 0.06~5.14(1.24) | 贫 | ||
| 中基性喷出岩 | 0.34~3.74(1.40) | 0.72~21.88(2.95) | 0.12 | 0.43~4.64(0.93) | 贫 | ||
| 碱性岩 | 0.80~4.00(1.72) | 3.50~21.60(10.67) | 2.47 | 0.76~8.29(4.02) | 中等 | ||
| 野马泉 岛弧带 | 酸性侵入岩 | 1.44~6.92(3.77) | 5.97~17.15(9.78) | 4.79 | 3.02~14.07(8.56) | 富 | |
| 酸性喷出岩 | 1.64~2.83(2.04) | 4.34~8.01(6.79) | 1.02 | 2.93~3.13(3.06) | 中等 | ||
| 中基性侵入岩 | 0.12~4.29(1.19) | 0.41~8.88(3.29) | 0.08 | 0.13~2.86(1.11) | 贫 | ||
| 中基性喷出岩 | 0.08~6.12(1.68) | 0.45~25.36(3.60) | 0.03 | 0.36~4.07(1.17) | 贫 | ||
| 碱性岩 | 0.08~6.14(2.89) | 2.90~25.36(8.86) | 3.35 | 0.51~12.50(5.74) | 富 | ||
| 将军庙 地块 | 酸性侵入岩 | 1.83~2.70(2.17) | 4.76~6.61(5.35) | 0.58 | 2.45~3.50(2.75) | 中等 | |
| 酸性喷出岩 | 3.11~3.90(3.38) | 4.38~4.90(4.67) | 0.36 | 3.52~4.07(3.74) | 中等 | ||
| 中基性侵入岩 | 0.32~2.24(1.06) | 3.17~8.88(4.43) | 0.14 | 0.32~2.94(1.16) | 贫 | ||
| 中基性喷出岩 | 0.57~0.98(0.72) | 3.17~3.69(3.38) | 0.00 | 0.46~0.86(0.58) | 贫 | ||
| 碱性岩 | 1.83~2.70(2.24) | 4.76~6.61(5.47) | 0.65 | 2.60~3.50(2.89) | 中等 | ||
图6 准噶尔盆地中北部蚀源区各类岩浆岩古铀含量与年龄特征 a—准噶尔盆地中北部蚀源区;b—阿尔泰造山带;c—西准噶尔造山带;d—西准噶尔造山带。
Fig.6 Ancient uranium content and age characteristics of various magmatic rocks in the erosion source area in the central and northern Junggar Basin
图7 准噶尔盆地中北部蚀源区岩浆岩古铀含量分布特征
Fig.7 Distribution characteristics of ancient uranium content in magmatic rocks in the erosion source area in the central and northern Junggar Basin
图8 蚀源区不同类型岩浆岩的U、U0、ΔU和K值累积分布曲线 a—现今铀含量累积分布曲线;b—古铀含量累积分布曲线;c—铀迁移量累积分布曲线;d—K值累积分布曲线。
Fig.8 Accumulated distribution curves of U, U0, ΔU and K of different types of magmatic rocks in the erosion source area
图9 蚀源区不同时代岩浆岩的U、U0、ΔU和K值累积分布曲线 a—现今铀含量累积分布曲线;b—古铀含量累积分布曲线;c—铀迁移量累积分布曲线;d—K值累积分布曲线。
Fig.9 Accumulated distribution curves of U, U0, ΔU and K of magmatic rocks from different eras in the erosion source area
图10 蚀源区不同类型岩浆岩供铀能力划分(据文献[56])
Fig.10 Division of uranium supply capacity for different types of magmatic rocks in the erosion source area. Modified after [56].
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