Citation: | XILUO Langjie, WANG Genhou, ZENG Qinggao, FENG Yipeng, Cidan, HAN Ning, ZHANG Peilie, WEI Yansong, WANG Weiyi. 2022. The kinks of the Yeba Group in the southern margin of the central Gangdese of Xizang and its geological significance. Journal of Geomechanics, 28(3): 338-352. doi: 10.12090/j.issn.1006-6616.2021163 |
The Yeba Group, located in the southern margin of Gangdese, is a typical structural transition zone with complex multistage structural deformations. Previous evidence has shown that these complex structural deformations are related to the Qulong and Jiama deposits developed in the Yeba Group. Kinks therein are a representative of structural deformation in the brittle-ductile structural transition zone. Their deformation and distribution characteristics, kinematic features and temperature environment are the focus of this study, so as to explore the tectonic background. The results from the chlorite thermometer and calcite e-twins characteristics show that the temperature is between 170℃~299℃ for the formation of the kinks in the study area, indicating a tectonic uplift during the formation process. According to the kinematic analysis of the kinks based on field outcrops and BSE-based images, it is inferred that the principal compressive stress is top-down (vertically downward), which is consistent with the principal compressive stress of the large-scale NS-trending gliding nappes in the southern margin of Gangdese during that period. Combined with the results of the relative chronological analysis, we believe that the kinks developed in the Yeba Group are the product of brittle-ductile deformation under the extension of the southern Lhasa terrane since 25 Ma.
CATHELINEAU M, NIEVA D, 1985. A chlorite solid solution geothermometer the Los Azufres (Mexico) geothermal system[J]. Contributions to Mineralogy and Petrology, 91(3): 235-244. doi: 10.1007/BF00413350 |
CATHELINEAU M, 1988. Cation site occupancy in chlorites and illites as a function of temperature[J]. Clay Minerals, 23(4): 471-485. doi: 10.1180/claymin.1988.023.4.13 |
CHANG C F, ZHENG L X, 1973. Tectonic features of the mount Jolmo Lungma region in southern Xizang, China[J]. Scientia Geologica Sinica, 8(1): 1-12. (in Chinese with English abstract) |
CHEN H, WANG H H, BAO G D, 2021. Detrital zircon age from the glacial and littoral deposit, Northern Victoria Land, Antarctica: Implications for the timing of magmatic activity of the Ross Orogeny on the Gondwana continental margin[J]. Journal of Geomechanics, 27(5): 796-808. (in Chinese with English abstract) |
CHEN W, MA C Q, BIAN Q J, et al., 2009. Evidences from geochemistry and zircon U-Pb geochronology of volcanic rocks of Yeba formation in Demingding Area, the east of middle Gangdise, Xizang[J]. Geological Science and Technology Information, 28(3): 31-40. (in Chinese with English abstract) |
CHENG N N, LIU Q, HOU Q L, et al., 2018. Discussions on the stress-chemical process of gold precipitation and metallogenic mechanism in shear zone type gold deposits[J]. Acta Petrologica Sinica, 34(7): 2165-2180. (in Chinese with English abstract) |
CHUNG S L, LIU D Y, JI J Q, et al., 2003. Adakites from continental collision zones: melting of thickened lower crust beneath southern Xizang[J]. Geology, 31(11): 1021-1024. doi: 10.1130/G19796.1 |
DEBON F, LE FORT P, SHEPPARD S M F, et al., 1986. The four plutonic belts of the Transhimalaya-Himalaya: A chemical, mineralogical, isotopic, and chronological synthesis along a Xizang-Nepal section[J]. Journal of Petrology, 27(1): 219-250. doi: 10.1093/petrology/27.1.219 |
DING L, YUE Y H, CAI F L, et al., 2006. 40Ar/39Ar geochronology, geochemical and Sr-Nd-O isotopic characteristics of the High-Mg Ultrapotassic rocks in Lhasa block of Xizang: implications in the onset time and depth of NS-striking rift system[J]. Acta Geologica Sinica, 80(9): 1252-1261. (in Chinese with English abstract) |
DONG G C, MO X X, ZHAO Z D, et al., 2006. Magma mixing in middle part of Gangdise magma belt: Evidences from granitoid complex[J]. Acta Petrologica Sinica, 22(4): 835-844. (in Chinese with English abstract) |
DONG Y H, XU J F, ZENG Q G, et al., 2006. Is there a Neo-Tethys' subduction record earlier than arc volcanic rocks in the Sangri group?[J]. Acta Petrologica Sinica, 22(3): 661-668. (in Chinese with English abstract) |
DUAN J L, TANG J X, MASON R, et al., 2014. Zircon U-Pb age and deformation characteristics of the Jiama porphyry copper deposit, Xizang: implications for relationships between mineralization, structure and alteration[J]. Resource Geology, 64(4): 316-331. doi: 10.1111/rge.12043 |
FENG Y P, WANG G H, MENG Y K, et al., 2020. Kinematics, strain patterns, rheology, and geochronology of Woka ductile shear zone: Product of uplift of Gangdese batholith and Great Counter Thrust activity[J]. Geological Journal, 55(11): 7251-7271. doi: 10.1002/gj.3977 |
FERRILL D A, MORRIS A P, EVANS M A, et al., 2004. Calcite twin morphology: A low-temperature deformation geothermometer[J]. Journal of Structural Geology, 26(8): 1521-1529. doi: 10.1016/j.jsg.2003.11.028 |
GENG Q R, PAN G T, WANG L Q, et al., 2006. Isotopic geochronology of the volcanic rocks from the Yeba Formation in the Gangdise zone, Xizang[J]. Sedimentary Geology and Tethyan Geology, 26(1): 1-7. (in Chinese with English abstract) |
HU D G, WU Z H, JIANG W, et al., 2004. Geochronological studies on the deformation and metamorphism of the Precambrian gabbro from the western area of Nam Co, northern Xizang[J]. Acta Petrologica Sinica, 20(3): 627-632. (in Chinese with English abstract) |
HUANG F, XU J F, CHEN J L, et al., 2015. Early Jurassic volcanic rocks from the Yeba Formation and Sangri Group: Products of continental marginal arc and intra-oceanic arc during the subduction of Neo-Tethys Ocean?[J]. Acta Petrologica Sinica, 31(7): 2089-2100. (in Chinese with English abstract) |
JI W Q, WU F Y, CHUNG S L, et al., 2009a. Zircon U-Pb geochronology and Hf isotopic constraints on petrogenesis of the Gangdese batholith, southern Xizang[J]. Chemical Geology, 262(3-4): 229-245. doi: 10.1016/j.chemgeo.2009.01.020 |
JI W Q, WU F Y, LIU C Z, et al., 2009b. Geochronology and petrogenesis of granitic rocks in Gangdese batholith, southern Xizang[J]. Science in China Series D: Earth Sciences, 52(9): 1240-1261. doi: 10.1007/s11430-009-0131-y |
JOHNSON A M, 1977. Styles of folding[M]. Netherlands: Elsevier Scientific Publishing Company. |
KRANIDIOTIS P, MACLEAN W H, 1987. Systematics of chlorite alteration at the Phelps Dodge massive sulfide deposit, Matagami, Quebec[J]. Economic Geology, 82(7): 1898-1911. doi: 10.2113/gsecongeo.82.7.1898 |
MA S W, XU Z Q, ZHANG Z K, et al., 2016. Structural deformation and its constrains of mineralization of the Jiama copper-polymetallic deposit, southern Xizang[J]. Acta Petrologica Sinica, 32(12): 3781-3799. (in Chinese with English abstract) |
MA X X, XU Z Q, CHEN X J, et al., 2017. The origin and tectonic significance of the volcanic rocks of the Yeba formation in the Gangdese magmatic Belt, South Xizang[J]. Journal of Earth Science, 28(2): 265-282. doi: 10.1007/s12583-016-0925-8 |
MA Y, 2017. Tectonic evolution of the Cretaceous back-arc basin in the middle-east segment of the south Gangdese, south Xizang[D]. Beijing: China University of Geosciences (Beijing). (in Chinese with English abstract) |
MA Y, XU Z Q, LI G W, et al., 2017. Crustal deformation of the Gangdese Cretaceous back-arc basin and formation of Proto-plateau, South Xizang[J]. Acta Petrologica Sinica, 33(12): 3861-3872. (in Chinese with English abstract) |
MELKA K, 1965. Proposal of chlorite classification. Vestník Ustredního Ústavu Geologického, 40: 23-29. |
MENG Y K, DONG H W, CONG Y, et al., 2016. The early-stage evolution of the Neo-Tethys Ocean: evidence from granitoids in the middle Gangdese batholith, southern Xizang[J]. Journal of Geodynamics, 94-95: 34-49. doi: 10.1016/j.jog.2016.01.003 |
MENG Y K, XU Z Q, MA S W, et al., 2016. Deformational characteristics and geochronological constraints of Quxu ductile shear zone in middle Gangdese magmatic Belt, South Xizang[J]. Earth Science, 41(7): 1081-1098. (in Chinese with English abstract) |
MENG Y K, XU Z Q, 2017. Tectonic evolution of the southern region in the middle Gangdese batholith, Southern Xizang[J]. Acta Geoscientica Sinica, 38(S1): 15-18. (in Chinese with English abstract) |
MO X X, NIU Y L, DONG G C, et al., 2008. Contribution of syncollisional felsic magmatism to continental crust growth: a case study of the Paleogene Linzizong volcanic succession in southern Xizang[J]. Chemical Geology, 250(1-4): 49-67. doi: 10.1016/j.chemgeo.2008.02.003 |
MO X X, 2011. Magmatism and Evolution of the Xizang Plateau[J]. Geological Journal of China Universities, 17(3): 351-367. (in Chinese with English abstract) |
MOLNAR P, PARDO-CASAS F, STOCK J, 1988. The Cenozoic and Late Cretaceous evolution of the Indian Ocean Basin: uncertainties in the reconstructed positions of the Indian, African and Antarctic plates[J]. Basin Research, 1(1): 23-40. doi: 10.1111/j.1365-2117.1988.tb00003.x |
NAJMAN Y, APPEL E, BOUDAGHER-FADEL M, et al., 2010. Timing of India-Asia collision: Geological, biostratigraphic, and palaeomagnetic constraints[J]. Journal of Geophysical Research: Solid Earth, 115(B12): B12416. doi: 10.1029/2010JB007673 |
PAN G T, MO X X, HOU Z Q, et al., 2006. Spatial-temporal framework of the Gangdese Orogenic Belt and its evolution[J]. Acta Petrologica Sinica, 22(3): 521-533. (in Chinese with English abstract) |
PAN G T, WANG L Q, LI R S, et al., 2012. Tectonic evolution of the Qinghai-Xizang plateau[J]. Journal of Asian Earth Sciences, 53: 3-14. doi: 10.1016/j.jseaes.2011.12.018 |
PATERSON M S, WEISS L E, 1966. Experimental deformation and folding in Phyllite[J]. GSA Bulletin, 77(4): 343-374. doi: 10.1130/0016-7606(1966)77[343:EDAFIP]2.0.CO;2 |
RAMSAY J G, 1980. Shear zone geometry: A review[J]. Journal of Structural Geology, 2(1-2): 83-99. doi: 10.1016/0191-8141(80)90038-3 |
SIBSON R H, 1977. Fault rocks and fault mechanisms[J]. Journal of the Geological Society, 133(3): 191-213. doi: 10.1144/gsjgs.133.3.0191 |
SONG W J, HU D G, ZHANG X J, et al., 2012. Research on extraction of remote sensing alteration anomalies in Jiama copper deposit in Gangdise Metallogenic belt, Xizang[J]. Journal of Geomechanics, 18(3): 319-330. (in Chinese with English abstract) |
STEWART K G, ALVAREZ W, 1991. Mobile-hinge kinking in layered rocks and models[J]. Journal of Structural Geology, 13(3): 243-259. doi: 10.1016/0191-8141(91)90126-4 |
TANG Y, WANG G H, FENG Y P, et al., 2022. Tectonostratigraphic properties and evolution of the Yeba volcanic arc in South Gangdese, Xizang[J]. Earth Science Frontiers, 29(1): 285-302. (in Chinese with English abstract) |
TAPPONNIER P, PELTZER G, LE DAIN A Y, et al., 1982. Propagating extrusion tectonics in Asia: New insights from simple experiments with plasticine[J]. Geology, 10(12): 611-616. doi: 10.1130/0091-7613(1982)10<611:PETIAN>2.0.CO;2 |
VERBEEK E R, 1978. Kink bands in the Somport slates, west-central Pyrenees, France and Spain[J]. GSA Bulletin, 89(6): 814-824. doi: 10.1130/0016-7606(1978)89<814:KBITSS>2.0.CO;2 |
WANG E, KAMP P J, XU G Q, et al., 2015. Flexural bending of southern Xizang in a retro foreland setting[J]. Scientific Reports, 5: 12076. doi: 10.1038/srep12076 |
WEI Y Q, 2017. Mesozoic volcanic and sedimentary rocks on the southern margin of Lhasa Terrane, southern Xizang: geochronology, geochemistry and tectonic implications[D]. Beijing: China University of Geosciences (Beijing). (in Chinese with English abstract) |
WU Z H, YE P S, HU D G, et al., 2003. Thrust system of the North Lhasa block[J]. Geological Review, 49(1): 74-80. (in Chinese) |
XIANG B W, ZHU G, WANG Y S, et al., 2007. Mineral deformation thermometer for mylonitization[J]. Advances in Earth Science, 22(2): 126-135. (in Chinese) |
XIONG Q W, CHEN J L, XU J F, et al., 2015. LA-ICP-MS zircon U-Pb geochronology, geochemical characteristics and genetic study of Yeba Formation lavas in Demingding area, southern Xizang[J]. Geological Bulletin of China, 34(9): 1645-1655. (in Chinese with English abstract) |
XU Z Q, DILEK Y, CAO H, et al., 2015. Paleo-Tethyan evolution of Xizang as recorded in the East Cimmerides and West Cathaysides[J]. Journal of Asian Earth Sciences, 105: 320-337. doi: 10.1016/j.jseaes.2015.01.021 |
YE P S, 2004. Ophiolites and thrust system of middle Lhasa block[D]. Beijing: Chinese Academy of Geological Sciences. (in Chinese with English abstract) |
ZENG Z C, LIU D M, ZE R Z X, et al., 2009. Geochemistry and tectonic setting of lavas in the Yeba formation in the eastern part of the Gangdise belt[J]. Journal of Jilin University (Earth Science Edition), 39(3): 435-445. (in Chinese with English abstract) |
ZHANG B, LI S F, ZHANG J J, et al., 2010. Kink, kink-band and conjugate kink-band: A probably potential new type of structural trap[J]. Natural Gas Industry, 30(2): 32-39, 71. (in Chinese with English abstract) |
ZHANG B, ZHANG Z P, ZHENG Y D, et al., 2012. Kink-band structure and its geophysical forward modeling[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 48(1): 105-115. (in Chinese with English abstract) |
ZHANG H W, LIU F Z, WANG J C, et al., 2022. Hazard assessment of debris flows in Kongpo Gyamda, Xizang based on FLO-2D numerical simulation[J]. Journal of Geomechanics, 28(3): 306-318, doi:10.12090/j.issn.1006-6616.2021117. (in Chinese with English abstract) |
ZHANG J J, 2007. A review on the extensional structures in the northern Himalaya and southern Xizang[J]. Geological Bulletin of China, 26(6): 639-649. (in Chinese with English abstract) |
ZHANG J J, GUO L, 2007. Structure and geochronology of the southern Xainza-Dinggye rift and its relationship to the south Xizang detachment system[J]. Journal of Asian Earth Sciences, 29(5-6): 722-736. doi: 10.1016/j.jseaes.2006.05.003 |
ZHAO W J, 2016. A discussion on the regional tectonic-magmatic activity and the metallogensis of gangdise porphyry copper belt based on the deep structure of continent-continent collision belt in Southern Xizang[J]. Acta Geoscientica Sinica, 37(1): 7-24. (in Chinese with English abstract) |
ZHAO Z, HU D G, WU Z H, et al., 2012. Molybdenite Re-Os isotopic dating of Sangbujiala copper deposit in the south margin of the eastern Gangdese section, Xizang, and its geological implications[J]. Journal of Geomechanics, 18(2): 178-186. (in Chinese with English abstract) |
ZHENG Y D, WANG T, WANG X S, 2007a. The maximum effective moment criterion (MEMC) and related geological structures[J]. Earth Science Frontiers, 14(4): 49-60. (in Chinese with English abstract) |
ZHENG Y D, WANG T, WANG X S, 2007b. Theory and practice of the maximum effective moment criterion (MEMC)[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 43(2): 145-156. (in Chinese with English abstract) |
ZHONG K H, LI L, ZHOU H W, et al., 2012. Features of Jiama (Gyama)-Kajunguo Thrust-gliding Nappe tectonic system in Xizang[J]. Acta Geoscientia Sinica, 33(4): 411-423. (in Chinese with English abstract) |
ZHONG K H, YAO D, DUO J, et al., 2013. Structural features of Yeba Tectonite Group in Jiama (Gyama)-Qulong area of Xizang[J]. Acta Geoscientica Sinica, 34(1): 75-86. (in Chinese with English abstract) |
ZHU D C, PAN G T, CHUNG S L, et al., 2008. SHRIMP zircon age and geochemical constraints on the origin of Lower Jurassic volcanic rocks from the Yeba Formation, southern Gangdese, South Xizang[J]. International Geology Review, 50(5): 442-471. doi: 10.2747/0020-6814.50.5.442 |
ZHU D C, ZHAO Z D, NIU Y L, et al., 2011. The Lhasa Terrane: record of a microcontinent and its histories of drift and growth[J]. Earth and Planetary Science Letters, 301(1-2): 241-255. doi: 10.1016/j.epsl.2010.11.005 |
ZHU D C, ZHAO Z D, NIU Y L, et al., 2013. The origin and pre-Cenozoic evolution of the Xizang Plateau[J]. Gondwana Research, 23(4): 1429-1454. doi: 10.1016/j.gr.2012.02.002 |
陈虹, 王宏晖, 包国栋, 2021. 冈瓦纳大陆边缘罗斯运动的岩浆活动时代: 来自北维多利亚地松散沉积物锆石年龄的证据[J]. 地质力学学报, 27(5): 796-808. |
陈炜, 马昌前, 边秋娟, 等, 2009. 西藏得明顶地区叶巴组火山岩地球化学特征和同位素U-Pb年龄证据[J]. 地质科技情报, 28(3): 31-40. doi: 10.3969/j.issn.1000-7849.2009.03.006 |
程南南, 刘庆, 侯泉林, 等, 2018. 剪切带型金矿中金沉淀的力化学过程与成矿机理探讨[J]. 岩石学报, 34(7): 2165-2180. |
丁林, 岳雅慧, 蔡福龙, 等, 2006. 西藏拉萨地块高镁超钾质火山岩及对南北向裂谷形成时间和切割深度的制约[J]. 地质学报, 80(9): 1252-1261. doi: 10.3321/j.issn:0001-5717.2006.09.003 |
董国臣, 莫宣学, 赵志丹, 等, 2006. 冈底斯岩浆带中段岩浆混合作用: 来自花岗杂岩的证据[J]. 岩石学报, 22(4): 835-844. |
董彦辉, 许继峰, 曾庆高, 等, 2006. 存在比桑日群弧火山岩更早的新特提斯洋俯冲记录么?[J]. 岩石学报, 22(3): 661-668. |
耿全如, 潘桂棠, 王立全, 等, 2006. 西藏冈底斯带叶巴组火山岩同位素地质年代[J]. 沉积与特提斯地质, 26(1): 1-7. doi: 10.3969/j.issn.1009-3850.2006.01.001 |
胡道功, 吴珍汉, 江万, 等, 2004. 藏北纳木错西缘前寒武纪辉长岩变质变形年代学研究[J]. 岩石学报, 20(3): 627-632. |
黄丰, 许继峰, 陈建林, 等, 2015. 早侏罗世叶巴组与桑日群火山岩: 特提斯洋俯冲过程中的陆缘弧与洋内弧?[J]. 岩石学报, 31(7): 2089-2100. |
马士委, 许志琴, 张忠坤, 等, 2016. 藏南甲玛铜多金属矿床构造变形及其对成矿的制约[J]. 岩石学报, 32(12): 3781-3799. |
马元, 2017. 西藏南冈底斯中东段白垩纪弧后盆地构造演化[D]. 北京: 中国地质大学(北京). |
马元, 许志琴, 李广伟, 等, 2017. 藏南冈底斯白垩纪弧后盆地的地壳变形及初始高原的形成[J]. 岩石学报, 33(12): 3861-3872. |
孟元库, 许志琴, 马士委, 等, 2016. 藏南冈底斯岩浆带中段曲水韧性剪切带的变形特征及其年代学约束[J]. 地球科学, 41(7): 1081-1098. |
孟元库, 许志琴, 2017. 藏南冈底斯地体中段南缘构造演化[J]. 地球学报, 38(S1): 15-18. doi: 10.3975/cagsb.2017.s1.05 |
莫宣学, 2011. 岩浆作用与青藏高原演化[J]. 高校地质学报, 17(3): 351-367. doi: 10.3969/j.issn.1006-7493.2011.03.001 |
潘桂棠, 莫宣学, 侯增谦, 等, 2006. 冈底斯造山带的时空结构及演化[J]. 岩石学报, 22(3): 521-533. |
宋晚郊, 胡道功, 张绪教, 等, 2012. 西藏冈底斯成矿带甲马段蚀变遥感异常信息提取研究[J]. 地质力学学报, 18(3): 319-330. doi: 10.3969/j.issn.1006-6616.2012.03.015 |
唐宇, 王根厚, 冯翼鹏, 等, 2022. 西藏南冈底斯叶巴火山弧的构造-地层属性及其演化[J]. 地学前缘, 29(1): 285-302. |
魏友卿, 2017. 西藏拉萨地体南缘中生代火山岩与碎屑沉积岩的年代学、地球化学及构造意义[D]. 北京: 中国地质大学(北京). |
吴珍汉, 叶培盛, 胡道功, 等, 2003. 拉萨地块北部逆冲推覆构造系统[J]. 地质论评, 49(1): 74-80. doi: 10.3321/j.issn:0371-5736.2003.01.011 |
向必伟, 朱光, 王勇生, 等, 2007. 糜棱岩化过程中矿物变形温度计[J]. 地球科学进展, 22(2): 126-135. doi: 10.3321/j.issn:1001-8166.2007.02.002 |
熊秋伟, 陈建林, 许继峰, 等, 2015. 拉萨地块南部得明顶地区叶巴组火山岩LA-ICP-MS锆石U-Pb年龄、地球化学特征及其成因[J]. 地质通报, 34(9): 1645-1655. doi: 10.3969/j.issn.1671-2552.2015.09.006 |
叶培盛, 2004. 拉萨地块中部蛇绿岩与逆冲推覆构造[D]. 北京: 中国地质科学院. |
曾忠诚, 刘德民, 泽仁扎西, 等, 2009. 西藏冈底斯东段叶巴组火山岩地球化学特征及其地质构造意义[J]. 吉林大学学报(地球科学版), 39(3): 435-445. |
张波, 李生福, 张进江, 等, 2010. 膝褶、膝褶带、共轭膝褶带: 一种可能的新型油气构造样式[J]. 天然气工业, 30(2): 32-39, 71. |
张波, 张仲培, 郑亚东, 等, 2012. 膝褶带构造及其地球物理正演[J]. 北京大学学报(自然科学版), 48(1): 105-115. |
张浩韦, 刘福臻, 王军朝, 等, 2022. 基于FLO-2D数值模拟的工布江达县城泥石流灾害危险性评价[J]. 地质力学学报, 28(3): 306-318, doi:10.12090/j.issn.1006-6616.2021117. |
张进江, 2007. 北喜马拉雅及藏南伸展构造综述[J]. 地质通报, 26(6): 639-649. doi: 10.3969/j.issn.1671-2552.2007.06.003 |
赵文津, 2016. 从藏南陆-陆碰撞带深部结构构造演化探讨斑岩铜矿的成岩成矿问题[J]. 地球学报, 37(1): 7-24. |
赵珍, 胡道功, 吴珍汉, 等, 2012. 西藏冈底斯东段南缘桑布加拉辉钼矿Re-Os定年及地质意义[J]. 地质力学学报, 18(2): 178-186. doi: 10.3969/j.issn.1006-6616.2012.02.008 |
郑亚东, 王涛, 王新社, 2007a. 最大有效力矩准则及相关地质构造[J]. 地学前缘, 14(4): 49-60. |
郑亚东, 王涛, 王新社, 2007b. 最大有效力矩准则的理论与实践[J]. 北京大学学报(自然科学版), 43(2): 145-156. |
钟康惠, 李磊, 周慧文, 等, 2012. 西藏甲玛-卡军果推-滑覆构造系特征[J]. 地球学报, 33(4): 411-423. doi: 10.3975/cagsb.2012.04.03 |
钟康惠, 姚丹, 多吉, 等, 2013. 西藏甲玛-驱龙地区叶巴岩组构造学特征[J]. 地球学报, 34(1): 75-86. |
Simplified tectonic map of the Lhasa terrane and geologic map of the study area
Attitudes in the axial surface and hinge of the kinks in the Yeba Group
Macroscopic characteristics of kinks
Conjugate kink-band and angular fold
Microstructural characteristics of kinks (All photos are X-Z plane oriented slices under single polarized light)
Diagram showing the bedding sliding of plane inside and outside the kink-band on the relationship between the inner and outer corners of the kinks
Modes of kink expansion
Schematic diagram showing different types of calcite e-twins at different temperatures (modified from Ferrill et al., 2004)
Classification diagram of chlorite variants
BSE-based images of electron probe point at a microscale
Micrographs of calcite e-twins (Orthogonally polarized; X-Z plane)
Structural profile of the southern Xizang collision zone (modified from Zhao et al., 2016)