scholarly journals Bolivian Crustal Xenoliths: Petrochronological Constraints on the History of the Central Andean Continental Crust

2020 ◽  
Author(s):  
Liannie Velazquez Santana ◽  
Claire McLeod ◽  
Barry Shaulis ◽  
Kenneth Brown
Keyword(s):  
Continental Crust ◽  
History Of ◽  
Crustal Xenoliths

Antarctica, a key to the understanding of the evolution of Gondwanaland

1977 ◽  
Vol 279 (963) ◽  
pp. 197-205 ◽  
Keyword(s):  
Continental Crust ◽  
Geological Structure ◽  
History Of

The geological structure of Antarctica, regarded by du Toit as the keystone to Gondwanaland, is known to reflect earlier features, some dating from Precambrian times. Improved knowledge of the evolution of Antarctica has contributed to an understanding of the history of Gondwanaland as a whole, and to the still wider question of the development of continental crust generally over the last 600 million years.

Zinc isotopic composition of the lower continental crust estimated from lower crustal xenoliths and granulite terrains

2020 ◽  
Vol 276 ◽  
pp. 92-108
Author(s):  
Ganglan Zhang ◽  
Yongsheng Liu ◽  
Frédéric Moynier ◽  
Yangtao Zhu ◽  
Zaicong Wang ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Continental Crust ◽  
Lower Continental Crust ◽  
Crustal Xenoliths ◽  
Lower Crustal

Growth of Cratons and their Post-Stabilization Histories

2004 ◽  
Author(s):  
John J. W. Rogers ◽  
M. Santosh
Keyword(s):  
Continental Crust ◽  
Evolutionary Process ◽  
Major Elements ◽  
Tectonic Activity ◽  
Crustal Recycling ◽  
The Earth ◽  
History Of ◽  
Superior Craton ◽  
The Relationship ◽  
Comparative Stability

As we have seen in chapter 3, continental crust evolved from regions of the mantle that contained higher concentrations of LIL elements than regions that underlie typical ocean basins. The most complete record of this evolutionary process is in cratons, which passed through periods of rapid crust production to times of comparative stability over intervals of several hundred million years. After the cratons became stable enough to accumulate sequences of undeformed platform sediments, they moved about the earth without being subjected to further compressive tectonic activity. Because many of the cratons are also partly covered by sediments that are unmetamorphosed or only slightly metamorphosed, they appear to have undergone very little erosion since the sediments were deposited. Thus, a craton may be considered as a large block of continental crust that has been permanently removed from the crustal recycling process. This chapter starts with a discussion of the history of cratons as interpreted from studies of the upper part of the crust. We describe the Superior craton of the Canadian shield and the Western Dharwar craton of southern India within the chapter and use appendix E for brief summaries of other typical cratons. These cratons and numerous others elsewhere developed at different times during earth history, and we look for similarities and differences that may have been caused by progressive cooling of the earth (chapter 2). This section concludes with a summary of the general evolution of cratons and the meaning of the terms “Archean” and “Proterozoic.” The following section is an investigation of processes that occurred following stabilization, all of which take place in the presence of fluids that permeate the crust. We include a summary of these fluids and their effects on anorogenic magmatism and separation of the lower and upper crust. The final section discusses the relationship between cratons and their underlying subcontinental lithospheric mantle (SCLM). Continual metasomatism and metamorphism of the SCLM after cratons develop above it apparently has not destroyed the relationship between the ages of the cratons and the concentrations of major elements in the SCLM. This provides us with an opportunity to determine whether cratons evolved from the mantle beneath them or by depletion of much larger volumes of mantle. The discussions in this chapter are based partly on information summarized in appendices B (heat flow) and D (isotopes).

Growth of Continental Crust and Related Tectonic, Magmatic and Mineralization History of Southern China

2001 ◽  
Vol 4 (4) ◽  
pp. 821-822
Author(s):  
Changshan Wei ◽  
Zhang Yeming ◽  
Fu Jianming ◽  
Cai Jinhui
Keyword(s):  
Continental Crust ◽  
Southern China ◽  
History Of
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