基底杂岩
- 与 基底杂岩 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The complex was traditionally considered as the Archean basement of the Yangtze Block, but recent isotopic dating results indicate that it was not formed in Archean.
康定杂岩以往被认为是扬子地块太古宇的基底,但近年来的同位素年龄测定结果表明其并不是形成于太古宙。
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Here have formed in about 14 million years ago to 3 million years between the Mesoproterozoic Jixian System Yunmeng Mountain Group - Upper Carboniferous Taiyuan Formation, exposed systems and complete; has Archaean - Early Mesoproterozoic basement, but also has the typical structure of relics, such as the basement Archaean gneissic complex structure, Early Mesoproterozoic supracrustal rocks at the end of secluded fornix structure, super-nappe cover, ductile shear zone tectonics, ductile - brittle deformation structure of brittle fault cleft construction, single-sided Hill Construction, as well as the cap structure of the collapse, landslides and other structure.
这里有形成于距今约14亿年~3亿年间的中元古界蓟县系云梦山组—上石炭统太原组地层,出露系统而完整;有太古界—早元古界基底,还有典型的构造遗迹,诸如基底太古界片麻杂岩构造,早元古界表壳岩的底僻穹窿构造,盖层的超覆构造,韧性剪切带构造,韧-脆性变形构造,脆性断裂构造,单面山构造,以及盖层中的垮塌构造,滑坡构造等。
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The lower zone and the bronzite of the transition zone may be compared with the basal zone of the still-water complex.
下岩带和过渡带的古铜辉岩可与斯蒂尔沃特杂岩的基底岩带相比。
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Basal synthem is the Taishan mountain group in archaean, is mainly the gneiss; The paleozoic synthem besides the regional lost stratas: Upper Ordovician, Silurian-Devonian and Lower Carboniferous, other stratas have the distribution, divides into Cambro-ordovician and Permo-Carboniferous two structure subgroups. Cambro-ordovician is a set of carbonate construction, Permo-Carboniferous system is a set contains the coal clastic rock deposition; In the mesozoic synthem lost Upper Triassic and Upper Crataceous ,growth Middle-Lower Triassic and Middle-Lower Jurassic and Lower Crataceous three structure subgroups, main growth varicolored land facies clastic rock, discovered rich fossil data such as cryptogam ,Ostracoda and Chareae and so on.
基底构造层指太古界泰山群,主要为片麻岩;古生界构造层除区域性缺失的上奥陶统、志留-泥盆系和下石炭统外,其余地层均有分布,分为冷武-奥陶系和石炭-二叠系两个构造亚层,冷武-奥陶系为一套碳酸盐建造,石炭-二叠系为一套含煤碎屑岩沉积;中生界构造层缺失上三叠统和上白垩统,发育下-中三叠统、下-中侏罗统和上侏罗-下白垩统三个构造亚层,为杂色陆相碎屑岩,发现丰富的孢粉、介形类、轮藻等化石;新生界古近系岩性以砂泥岩互层为主,含薄层油页岩,新近系-第四系为一套河流相沉积。
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The structure and evolution of the south tectonic melange are relative simple, and its basement, Middle Proterozoic metamorphosed diorite, is relative younger.
南部构造混杂岩带结构和演化相对较简单,其基底岩系相对年青,为中元古界角闪岩相变质的苦海杂岩。
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Its basement is composed of Mesoproterozoic greenstone and associated complex, with the tectonic characteristics of earlier crustal evolution.
研究表明,其基底由前中元古代绿岩及与之伴生的花岗质杂岩组成,它们具有地壳早期演化的地质构造特徵。
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These results suggest that the diagenesis material of the Xiangshan volcanic intrusive complex was derived from crustal sources. The sources either had relatively lower maturity or had more juvenile mantle-derived igneous rocks than the exposed basement metamorphic rocks. Involvement of a small amount mantle-derived magma during the formation of the Xiangshan volcanic-intrusive complex was also possible. The diorite enclave, sub-quartzmonzonitic porphyry and lamprophyre were probably different mixing products between mantle and crust materals.
上述同位素示踪结果充分证实:相山火山-侵入杂岩的成岩物质主要为壳源,但与该区出露的基底变质岩相比,其物源区的成熟度相对较低或含有一定量的火成物质,并且不排除在其成岩过程中少量地幔物质的介入;闪长质包体、次石英二长斑岩及煌斑岩的成岩物质均含有一定量的地幔组分,可能为壳-幔混合作用的产物,只是受地壳物质混染的程度不同而已。
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Longshan complex is located at the junction of Qinling and Qilian Orogen, and mainly distributed in Longshan Mountain, the west of Longxian County, which is separated from the Huluhe complex by the Baoping-Shanmen Fault to south, and connected with the Liupanshan Basin by the sub-fault to north. The upper magma is so extensive in this area that only Longshan complex is left as lentoid.
陇山杂岩地处秦岭—祁连造山带的结合部位,主体分布于陇县以西陇山山脉内,南以保平—山门韧性断裂带与葫芦河群相隔,向北与六盘山白垩纪沉积盆地以基底断层形式相接触,被后期火山岩体吞没,呈不连续透镜体状展布。
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Therefore,the northern Sulu UHPM zone can be divided into four petrological tectonic units from southeast to northwest:Haiyangsuo metamorphic complex (eclogitized crystalline basement of the Yangtze craton),Rongcheng UHPM complex,Weihai metamorphic complex (granulites retrograded from UHPM eclogites) and Kunyushan boundary metamorphic magmatic complex.
由此笔者将苏鲁变质带北部由南向北划分为海阳所变质地块(榴辉岩化扬子陆块基底变质单元)、荣成变质地块、威海变质地块(麻粒岩相叠加变质的超高压构造岩片)、昆嵛山边界杂岩带。
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