Meso-and Micro-structures of Foliated Eclogites in Dabie-Sulu UHP Belt and Implications for the Earl

来源 :Journal of Earth Science | 被引量 : 0次 | 上传用户:jifengrgj
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The sub-vertical meso-and micro-structures and fabrics developed in coesite-bearing foliated eclogites in the Taohang (桃行) area,southeastern Shandong (山东),China. The diagnostic structures and fabrics,including penetrative foliation or mylonitic foliation containing mineral and stretching lineations,as well as sheath-like folds,appear to be the development of anastomosing UHP eclogite-facies shear belt arrays hosting massive eclogites. Textural relationships and mineral assem-blages indicate that the deformation of foliated eclogites developed closely after the formation of the massive eclogite,prior to the development of the granulite/amphibolite-facies symplectites and coronas,occurring over a very wide pressure range of (31-8)×102 MPa. It presents the structural records of the tectonometamorphic processes as being responsible for the earliest stages of exhumation of the UHP metamorphic rocks. Extensive regional field observations show that the meso-and micro-structures and fabrics recognized in the foliated eclogites at Taohang are remarkably similar or consistent in the whole Dabie (大别)-Sulu (苏鲁) UHP metamorphic belt. This article,thus,supports the idea that the earliest stages of exhumation of the UHP metamorphic rocks,from mantle depths to the Moho or the mantle-crust boundary layering,may be attributed mainly to a sub-vertical extrusion and ductile flow along the subduction channel,belonging to a syn-collision exhumation at about 235 to 220 Ma. The sub-vertical meso-and micro-structures and fabrics developed in coesite-bearing foliated eclogites in the Taohang area, southeastern Shandong (Shandong), China. The diagnostic structures and fabrics, including penetrative foliation or mylonitic foliation containing mineral and stretching lineations, as well as sheath-like folds, appear to be the development of anastomosing UHP eclogite-facies shear belt arrays hosting massive eclogites. Textural relationships and mineral assem-blages indicate that the deformation of foliated eclogites developed closely after the formation of the massive eclogite, prior to the development of the granulite / amphibolite-facies symplectites and coronas, occurring over a very wide pressure range of (31-8) x 102 MPa. It presents the structural records of the tectonometamorphic processes as being responsible for the earliest stages of exhumation of the UHP metamorphic rocks. Extensive regional field observations show that the meso-and micro-structures and f abrics recognized in the foliated eclogites at Taohang are remarkably similar or consistent in the whole Dabie-Sulu UHP metamorphic belt. This article, thus the support that idea that the earliest stages of exhumation of the UHP metamorphic rocks , from mantle depths to the Moho or the mantle-crust boundary layering, may be attributed mainly to a sub-vertical extrusion and ductile flow along the subduction channel, belonging to a syn-collision exhumation at about 235 to 220 Ma.
其他文献
目的为了确定高风险性软组织肉瘤患者联合化疗和手术治疗对于局部肿瘤的控制和患者存活的效果,进行了回顾性调查。方法 25例高风险性软组织肉瘤患者,经过4个周期VP-16、异环
最近发表在《生物化学杂志》的一篇文章指出,在暴露于酸性环境中的肿瘤细胞内,一种被称为NOX5-S的酶的含量会酿著增高,从而使细胞内合成过量的过氧化氢。这一机制为胃酸反流容易导致食管癌提供了一种可能的解释。
目的研究表明西米替丁(CIM)能增强胃肠癌患者机体的免疫力,本实验探讨了CIM对结直肠癌(CRC)肿瘤浸润淋巴细胞(TIL) 及肿瘤间质细胞HLA-DR表达的影响,以了解CIM在CRC局部免疫
AIM:To investigate the interrelationship of Epstein-Barrvirus(EBV)and EBV-encoded proteins with Helicobacterpylori(H pylori)infection and the expression of c-m
病历摘要  例1 男,56岁,因双眼视物模糊2个月于2002年3月17日入院.检查双眼视力右0.4,左0.9,双侧眼底视乳头水肿,视野正常,进行神经科和眼科相应检查均未发现其他异常.给予视神经营养治疗,症状无明显缓解.1个月后出现腰痛而且视力下降有加重趋势.行CT检查发现L3~4椎间盘突出,拟行髓核摘除术而收入院。
我院自1995年4月至2000年4月按全直肠系膜切除(total mesorectal excision,TME)、结肠肛管吻合治疗低位直肠癌84例,在根治直肠癌的同时,又保留了肛门,取得了良好疗效,现报告如下。
患者男,15岁,无诱因出现口角歪斜1个月,左手无力半个月入院,患病期间无颅高压症状.体格检查:神志清醒.左眼视力0.5,右眼视力0.6,双眼底视乳头轻度水肿.双侧额纹对称,口角右偏.左手精细运动欠灵活,左上肢肌力V-,双下肢未引出病理反射,生殖器发育成人化。
熊× 男 58岁 以右上睑新生物6m余收住院.6m前患者无明显诱因出现右上睑皮夫一黄豆大小的新生物,逐渐长大,未经特殊处理.近4m来,发现新生物迅速生长,表面溃烂,无其它不适,遂来我院就诊.右眼视力1.0,右上睑皮肤中外2/3可见新生物,大约5mm×4mm×3mm,溃疡表面呈菜花样,向四周浸润,表面充血,不能推动,无压痛。
小组活动是组织英语课堂教学时经常使用的方法。本文结合笔者自身教学经验及课堂观摩就大学英语课堂教学中小组活动存在的问题进行讨论,并就如何改善小组活动提出几点对策。
通过对高职数学金字塔式教学模式实践的反思,总结高职学生的现状;反思几点教学策略的实施办法及效果:采用分组教学、距离最近原则教学、对不同层次的学生如何搭建不同的“鹰