- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
- [email protected]
An Al-rich, quartz-absent corundum-bearing pelitic granulite is reported for the first time at the Diebusige complex in the Alxa Block in the western part of the Khondalite Belt (KB), North China Craton (NCC). A detailed petrographic study shows that a quartz-present domain occurs in porphyroblastic garnet cores from the corundum …
اقرأ المزيد
The Khondalite Belt (KB), a Paleoproterozoic collisional orogen in the North China Craton (NCC), lacks a well-established pre-collisional tectonic evolution due to the paucity of late Neoarchean to middle Paleoproterozoic magmatic rocks. This study focuses on the poorly dated charnockites in the Zhuozi area, the eastern segment of the KB.
اقرأ المزيد
The Khondalite Belt is widely regarded as a Paleoproterozoic collisional orogen between the Yinshan and Ordos Blocks in the Western Block of the North China Craton. However, the deformation history of the Khondalite Belt is poorly understood, and many aspects of the tectonic processes involved in the collision remain enigmatic.
اقرأ المزيد
The Paleoproterozoic gneiss domes are important structures of the Khondalite Belt in the northwestern North China Craton. However, less attention has been paid to their formation and evolution, and it thus hampers a better understanding of the deformation history of the Khondalite Belt. In this paper, we conducted structural and …
اقرأ المزيد
The Paleoproterozoic Khondalite belt in the North China craton preserves evidence for ultrahightemperature (UHT) crustal metamorphism associated with the collision of the Yinshan and Ordos Blocks. Here we apply two-feldspar geothermometry to UHT granulites from two localities newly reported in this study (Tuguishan and Xuwujia) and …
اقرأ المزيد
The figured sample ( 1329, above) is a coarse khondalite, sensu strictu from the Kunnanpara quarry, just north of Trivandrum (Thiruvananthapuram) in Kerala, south India. The locality is described in Ashwal (1988, "site 2" of pp.361-368). For an introduction to the regional geology, see also the fine field guide of Ravindra Kumar et al. (1990).
اقرأ المزيد
Partially Lateritised Khondalite (PLK) rocks are the waste materials generated as a result of mining of bauxite. The major discolouring elemental impurities in the PLK are titanium oxide and iron oxides, which render it unsuitable for its use as a filler material. The impurities in PLK must be removed substantially using appropriate …
اقرأ المزيد
The Khondalite Belt (Fengzhen belt; Fig. 1 a; Zhai et al., 2000, Zhai et al., 2010 ), formed in Paleoproterozoic by continent–continent collision between the Yinshan and Ordos blocks, is one of the most important delineation boundaries of tectonic subdivision of the NCC ( Yin et al., 2011, Zhao and Cawood, 2012 ). There are different …
اقرأ المزيد
High-grade pelitic metasedimentary rocks (khondalites) are widely distributed in the northwestern part of the North China Craton and were named the 'Khondalite Belt'. Prior to the application of zircon geochronology, a stratigraphic division of the supracrustal rocks into several groups was established using interpretative field geology.
اقرأ المزيد
The garnets of both argillite and arenite khondalite in the Jenapore are relatively almandine rich (63 – 73% almandine content) as compared to those from the Chilka area (62 – 66% almandine content). Notably in both places' arenite samples are more almandine rich (70 – 73 % almandine in Jenapore and 66% in Chilka area.
اقرأ المزيد
The Khondalite Belt is an important orogenic belt in the Western Block of the North China Craton that was formed by the collision of the Ordos and Yinshan blocks in the Paleoproterozoic. In the background to the Mesozoic multi-plate convergence, the Western Block lithosphere was activated along with magma and tectonic activity.
اقرأ المزيد