东南极拉斯曼丘陵中山站地区Rb含量初步调查
|
摘要
利用手持快速矿石分析仪(NITON XL3t-500S GOLDD)对拉斯曼丘陵中山站附近出露的基岩进行测试,初步调查结果显示该地区有明显的Rb元素富集。测试了17个样品,其中12个的Rb含量达到了0.04%,1个样品的Rb含量达到0.1%以上。分析测试样品特征,并结合拉斯曼丘陵地质特征发现,拉斯曼丘陵地区Rb的富集与含黑云母的泛非期伟晶岩墙关系密切,而且粒度越大Rb含量越高,类比推测该区域Rb元素富集潜力巨大,有必要继续开展相应的地质调查工作,进一步探讨其富集成因和规律。
NITON XL3 t-500 S GOLDD was applied to test bedrock samples outcropping near Zhongshan Station in the Larsemann Hills of Antarctica. Preliminary survey results show apparently enriched rubidium(Rb) contents. Among the 17 tested rock samples, 12 contained around 0.04% Rb, and one contained as much as 0.1%. By analyzing the sample features, and considering the geological characteristics of the Larsemann Hills, we conclude that the enrichment of Rb is related strongly to a biotite-pegmatite dyke formed in the Pan-African period. Furthermore, the larger the grains in the sample, the greater the Rb content. By analogical analysis, we speculate that the Larsemann Hills have big Rb potential. Therefore, it is necessary to carry out the corresponding geological investigation to further our understanding of the causes for and rules governing Rb enrichment in the Larsemann Hills.
NITON XL3 t-500 S GOLDD was applied to test bedrock samples outcropping near Zhongshan Station in the Larsemann Hills of Antarctica. Preliminary survey results show apparently enriched rubidium(Rb) contents. Among the 17 tested rock samples, 12 contained around 0.04% Rb, and one contained as much as 0.1%. By analyzing the sample features, and considering the geological characteristics of the Larsemann Hills, we conclude that the enrichment of Rb is related strongly to a biotite-pegmatite dyke formed in the Pan-African period. Furthermore, the larger the grains in the sample, the greater the Rb content. By analogical analysis, we speculate that the Larsemann Hills have big Rb potential. Therefore, it is necessary to carry out the corresponding geological investigation to further our understanding of the causes for and rules governing Rb enrichment in the Larsemann Hills.
引文
1刘小汉,赵越,仝来喜,等.罗迪尼亚-冈瓦纳古陆演化中的东南极陆块[J].世界科技研究与发展,2002,24(4):35-40.
2刘小汉,俞良军,赵越,等.东南极格罗夫山地质特征-冈瓦纳最终缝合带的新证据[J].中国科学D辑:地球科学,2002,32(6):457-468.
3俞良军,刘小汉,赵越,等.东南极格罗夫山镁铁质麻粒岩的变质作用[J].岩石学报,2002,18(4):501-516.
4 Zhao Y,Liu X H,Liu X C,et al.Pan-African events in Prydz Bay,East Antarctica,and their implications for East Gondwana tectonics[J].Geological Society Lodon Special Publications,2003,206(1):231-245.
5 Boger S D,Wilson C J L.Early Cambrian crustal shortening and a clockwise P-T-t path from the southern Prince Charles Mountains,East Antarctica:implications for the formation of Gondwana[J].Journal of Metamorphic Geology,2005,23(7):603-623.
6 Corvino A F,Boger S D,Wilson C J L,et al.Geology and SHRIMP U-Pb zircon chronology of the Clemence Massif,central Prince Charles Mountains,East Antarctica[J].Terra Antartica,2005,12(2):55-68.
7 Corvino A F,Boger S D,Henjes-Kunst F,et al.Superimposed tectonic events at 2450 Ma,2100 Ma,900 Ma and 500 Ma in the North Mawson Escarpment,Antarctic Prince Charles Mountains[J].Precambrian Research,2008,167(3-4):281-302.
8 Mikhalsky E V,Beliatsky B V,Sheraton J W,et al.Two distinct Precambrian terranes in the Southern Prince Charles Mountains,East Antarctica:SHRIMP dating and geochemical constraints[J].Gondwana Research,2006,9(3):291-309.
9 Liu X C,Jahn B M,Zhao Y,et al.Late Pan-African granitoids from the Grove Mountains,east Antarctica:age,origin and tectonic implication[J].Precambrian Research,2006,145(1-2):131-154.
10刘晓春,赵越,刘小汉,等.东南极普里兹带高级变质作用演化[J].地学前缘,2007,14(1):56-63.
11刘晓春,赵越,刘小汉,等.东南极晚新元古-早古生代构造热事件及其在冈瓦纳超大陆重建中的意义[J].高校地质学报,2007,13(3):546-560.
12刘晓春,赵越,胡健民,等.东南极格罗夫山:普里兹造山带中一个典型的泛非期变质地体[J].极地研究,2013,25(1):7-24.
13仝来喜,刘小汉,王彦斌,等.东南极拉斯曼丘陵泥质麻粒岩的变质作用演化[J].地质学报,2012,86(8):1273-1290.
14 Stüwe K,Braun H M,Peer H.Geology and structure of the Larsemann Hill area,Prydz Bay,East Antarctica[J].Australian Journal of Earth Sciences,1989,36(2):219-241.
15 Carson C J,Dirks P H G M,Hand M,et al.Compressional and extensional tectonics in low-medium pressure granulites from the Larsemann Hills,east Antarctica[J].Geological Magazine,1995,132(2):151-170.
16 Carson C J,Hand M,Dirks P H G M.Stable coexistence of grandidierite and kornerupine during medium pressure granulite facies metamorphism[J].Mineralogical Magazine,1995,59(395):327-339.
17 Fitzsimons I C W,Harley S L.Geological relationships in high-grade gneiss of the Brattstrand Bluffs coastline,Prydz Bay,east Antarctica[J].Australian Journal of Earth Sciences,1991,38(5):497-519.
18 Dirk P H G M,Hand M.Clarifying temperature-pressure paths via structures in granulite from the Bolingen Islands,Antarctica[J].Australian Journal of Earth Sciences,1995,42(2):157-172.
19王彦斌.南极拉斯曼丘陵及邻区高级片麻岩的地球化学、同位素年代学研究[D].北京:中国地质科学院,2002.
20 Dirk P H G M,Wilson C J L.Crustal evolution of the East Antarctic mobile belt in Prydz Bay:continental collision at 500 Ma?[J].Precambrian Research,1995,75(3-4):189-207.
21胡健民,刘晓春,赵越,等.南极普里兹造山带性质及构造变形过程[J].地球学报,2008,29(3):343-354.
22 Thost D E,Hensen B J,Motoyoshi Y.Two-stage decompression in garnet-bearing mafic ggranulites from Sostrene Island,Prydz Bay,East Antarctica[J].Journal of Metamorphic Geology,1991,9(3):245-256.
23 Ren L,Zhao Y,Liu X,et al.Re-examination of the metamorphic evolution of the Larsemann Hill.East Antarctica[M]//Yoshida Y.Recent Progress in Antarctic Earth Science.Tokyo:Terrapub,1992:145-153.
24 Hensen B J,Zhou B.A Pan-African granulite facies metamorphic episode in Prydz Bay,Antarcitica:evidence from Sm-Nd garnet dating[J].Australian Journal of Earth Sciences,1995,42(3):249-258.
25 Tong L,Liu X.The prograde metamorphism of the Larsemann Hills,East Antarctica:evidence for an anticlockwise P-T path[M]//Ricci C A.The Antarctic Region:Geological Evolution and Processes.Siena:Terra Antartica Publication,1997:105-114.
26任留东.南极拉斯曼丘陵及邻区高级区变质地质特征[D].北京:中国地质科学院,1997.
27 Tong L X,Liu X H,Wang Y B,et al.Metamorphic P-T paths of metapelitic granulites from the Larsemann Hills,East Antarctica[J].Lithos,2014,192-195(4):102-115.
2刘小汉,俞良军,赵越,等.东南极格罗夫山地质特征-冈瓦纳最终缝合带的新证据[J].中国科学D辑:地球科学,2002,32(6):457-468.
3俞良军,刘小汉,赵越,等.东南极格罗夫山镁铁质麻粒岩的变质作用[J].岩石学报,2002,18(4):501-516.
4 Zhao Y,Liu X H,Liu X C,et al.Pan-African events in Prydz Bay,East Antarctica,and their implications for East Gondwana tectonics[J].Geological Society Lodon Special Publications,2003,206(1):231-245.
5 Boger S D,Wilson C J L.Early Cambrian crustal shortening and a clockwise P-T-t path from the southern Prince Charles Mountains,East Antarctica:implications for the formation of Gondwana[J].Journal of Metamorphic Geology,2005,23(7):603-623.
6 Corvino A F,Boger S D,Wilson C J L,et al.Geology and SHRIMP U-Pb zircon chronology of the Clemence Massif,central Prince Charles Mountains,East Antarctica[J].Terra Antartica,2005,12(2):55-68.
7 Corvino A F,Boger S D,Henjes-Kunst F,et al.Superimposed tectonic events at 2450 Ma,2100 Ma,900 Ma and 500 Ma in the North Mawson Escarpment,Antarctic Prince Charles Mountains[J].Precambrian Research,2008,167(3-4):281-302.
8 Mikhalsky E V,Beliatsky B V,Sheraton J W,et al.Two distinct Precambrian terranes in the Southern Prince Charles Mountains,East Antarctica:SHRIMP dating and geochemical constraints[J].Gondwana Research,2006,9(3):291-309.
9 Liu X C,Jahn B M,Zhao Y,et al.Late Pan-African granitoids from the Grove Mountains,east Antarctica:age,origin and tectonic implication[J].Precambrian Research,2006,145(1-2):131-154.
10刘晓春,赵越,刘小汉,等.东南极普里兹带高级变质作用演化[J].地学前缘,2007,14(1):56-63.
11刘晓春,赵越,刘小汉,等.东南极晚新元古-早古生代构造热事件及其在冈瓦纳超大陆重建中的意义[J].高校地质学报,2007,13(3):546-560.
12刘晓春,赵越,胡健民,等.东南极格罗夫山:普里兹造山带中一个典型的泛非期变质地体[J].极地研究,2013,25(1):7-24.
13仝来喜,刘小汉,王彦斌,等.东南极拉斯曼丘陵泥质麻粒岩的变质作用演化[J].地质学报,2012,86(8):1273-1290.
14 Stüwe K,Braun H M,Peer H.Geology and structure of the Larsemann Hill area,Prydz Bay,East Antarctica[J].Australian Journal of Earth Sciences,1989,36(2):219-241.
15 Carson C J,Dirks P H G M,Hand M,et al.Compressional and extensional tectonics in low-medium pressure granulites from the Larsemann Hills,east Antarctica[J].Geological Magazine,1995,132(2):151-170.
16 Carson C J,Hand M,Dirks P H G M.Stable coexistence of grandidierite and kornerupine during medium pressure granulite facies metamorphism[J].Mineralogical Magazine,1995,59(395):327-339.
17 Fitzsimons I C W,Harley S L.Geological relationships in high-grade gneiss of the Brattstrand Bluffs coastline,Prydz Bay,east Antarctica[J].Australian Journal of Earth Sciences,1991,38(5):497-519.
18 Dirk P H G M,Hand M.Clarifying temperature-pressure paths via structures in granulite from the Bolingen Islands,Antarctica[J].Australian Journal of Earth Sciences,1995,42(2):157-172.
19王彦斌.南极拉斯曼丘陵及邻区高级片麻岩的地球化学、同位素年代学研究[D].北京:中国地质科学院,2002.
20 Dirk P H G M,Wilson C J L.Crustal evolution of the East Antarctic mobile belt in Prydz Bay:continental collision at 500 Ma?[J].Precambrian Research,1995,75(3-4):189-207.
21胡健民,刘晓春,赵越,等.南极普里兹造山带性质及构造变形过程[J].地球学报,2008,29(3):343-354.
22 Thost D E,Hensen B J,Motoyoshi Y.Two-stage decompression in garnet-bearing mafic ggranulites from Sostrene Island,Prydz Bay,East Antarctica[J].Journal of Metamorphic Geology,1991,9(3):245-256.
23 Ren L,Zhao Y,Liu X,et al.Re-examination of the metamorphic evolution of the Larsemann Hill.East Antarctica[M]//Yoshida Y.Recent Progress in Antarctic Earth Science.Tokyo:Terrapub,1992:145-153.
24 Hensen B J,Zhou B.A Pan-African granulite facies metamorphic episode in Prydz Bay,Antarcitica:evidence from Sm-Nd garnet dating[J].Australian Journal of Earth Sciences,1995,42(3):249-258.
25 Tong L,Liu X.The prograde metamorphism of the Larsemann Hills,East Antarctica:evidence for an anticlockwise P-T path[M]//Ricci C A.The Antarctic Region:Geological Evolution and Processes.Siena:Terra Antartica Publication,1997:105-114.
26任留东.南极拉斯曼丘陵及邻区高级区变质地质特征[D].北京:中国地质科学院,1997.
27 Tong L X,Liu X H,Wang Y B,et al.Metamorphic P-T paths of metapelitic granulites from the Larsemann Hills,East Antarctica[J].Lithos,2014,192-195(4):102-115.