scholarly journals The South India Precambrian crust and shallow lithospheric mantle: Initial results from the India Deep Earth Imaging Experiment (INDEX)

2013 ◽  
Vol 122 (6) ◽  
pp. 1435-1453 ◽  
Author(s):  
S S RAI ◽  
KAJALJYOTI BORAH ◽  
RITIMA DAS ◽  
SANDEEP GUPTA ◽  
SHALIVAHAN SRIVASTAVA ◽  
...  
Keyword(s):  
Lithospheric Mantle ◽  
South India ◽  
The South ◽  
Imaging Experiment ◽  
Deep Earth ◽  
Initial Results

Assessment Helmet Usage among Two Wheeler Users in the South India

2019 ◽  
Vol 10 (12) ◽  
pp. 833
Author(s):  
Gulappa Devagappanavar ◽  
Pallavi Sarji Uthkarsh
Keyword(s):  
South India ◽  
The South ◽  
Two Wheeler

scholarly journals Diamond formation in an electric field under deep Earth conditions

2021 ◽  
Vol 7 (4) ◽  
pp. eabb4644
Author(s):  
Yuri N. Palyanov ◽  
Yuri M. Borzdov ◽  
Alexander G. Sokol ◽  
Yuliya V. Bataleva ◽  
Igor N. Kupriyanov ◽  
...  
Keyword(s):  
Electric Fields ◽  
Lithospheric Mantle ◽  
Isotope Fractionation ◽  
Diamond Formation ◽  
Mantle Minerals ◽  
Electrochemical Processes ◽  
Mantle Mineral ◽  
Deep Earth ◽  
Diamond Crystallization ◽  
Global Carbon

Most natural diamonds are formed in Earth’s lithospheric mantle; however, the exact mechanisms behind their genesis remain debated. Given the occurrence of electrochemical processes in Earth’s mantle and the high electrical conductivity of mantle melts and fluids, we have developed a model whereby localized electric fields play a central role in diamond formation. Here, we experimentally demonstrate a diamond crystallization mechanism that operates under lithospheric mantle pressure-temperature conditions (6.3 and 7.5 gigapascals; 1300° to 1600°C) through the action of an electric potential applied across carbonate or carbonate-silicate melts. In this process, the carbonate-rich melt acts as both the carbon source and the crystallization medium for diamond, which forms in assemblage with mantle minerals near the cathode. Our results clearly demonstrate that electric fields should be considered a key additional factor influencing diamond crystallization, mantle mineral–forming processes, carbon isotope fractionation, and the global carbon cycle.

Epilogue

2020 ◽  
pp. 321-324
Author(s):  
Federico De Romanis
Keyword(s):  
Red Sea ◽  
South India ◽  
Second Century ◽  
The South ◽  
South Indian ◽  
Import And Export ◽  
Complex Relationships ◽  
The Ganges ◽  
Precious Stones

The epilogue summarizes what the two texts of the Muziris papyrus tell us about the pepper and ivory production of the ancient Cēra kingdom, South Indian commercial connections with the Ganges Valley, the logistics of the Red Sea–Alexandria transports, the complex relationships between the South India traders and the contractors of the Red Sea tax, and the assessment and payment of the import and export customs duties. It also looks at what the two texts do not mention—the part of pearls and precious stones in the South India trade of the mid-second century ad. Furthermore, a speculative estimate of the commercial venture final balance is attempted.

The Uneven Geography of Tyranny

2021 ◽  
pp. 185-228
Author(s):  
Christophe Jaffrelot ◽  
Pratinav Anil
Keyword(s):  
South India ◽  
Geographical Distance ◽  
The South ◽  
North East ◽  
The North ◽  
Asymmetrical Impact ◽  
Federal Structure

This chapter analyses the asymmetrical impact of the central policies on states. Federal structure and geographical distance meant that the spatial reach of these policies was not uniform. The arbitrary powers of the Emergency were a stronger presence in the Hindi belt than in the South, and in the states ruled by the Congress than in the holdouts. This was due to various factors such as the strengths and weaknesses of local Congresses vis-à-vis the opposition and the party at the centre; the strategies of state elites and bureaucracies; electoral considerations; factional competition; lobby influence; and the solipsism of the regime in Delhi. These were all determinants in the spread of the geography of tyranny which, on the whole, resulted in the Emergency being felt more strongly in the capital, its neighbouring states, and the Hindi belt than in states ruled by the opposition—the North East and South India.

Book Review: The South India Church Scheme

Theology ◽  
1947 ◽  
Vol 50 (321) ◽  
pp. 109-111
Author(s):  
Edmund Southampton
Keyword(s):  
South India ◽  
The South

Memorandum on Some Points Recently Raised by the South India Scheme

Theology ◽  
1935 ◽  
Vol 31 (182) ◽  
pp. 72-79
Author(s):  
B. J. Kidd
Keyword(s):  
South India ◽  
The South

The South Indian Tradition of the Apostle Thomas

1924 ◽  
Vol 56 (S1) ◽  
pp. 213-223 ◽  
Author(s):  
P. J. Thoma
Keyword(s):  
South India ◽  
Sixth Century ◽  
The South ◽  
The North ◽  
Indian Tradition ◽  
South Indian ◽  
Christian Origins ◽  
Final Settlement

Although a great deal has been written concerning St. Thomas's connexion with India, it has so far resulted only in barren controversies and inchoate theories. The finding of the “Gondophares.” coins in the Cabul region raised great hopes of a final settlement of the problem; but apart from the (itself doubtful) identification of a single name in the Ada Thomae, it has shed little light on the mysteries of Christian origins in India. Nay, it has had positively injurious results, inasmuch as it diverted the attention of scholars into fields far remote from the familiar haunts of the Thomistic tradition. South India is the quarter from which we should expect fresh evidence: the north has no known claims to any connexion with the Apostle. In the south live the Christians of St. Thomas—the so-called “Syrians” who for more than a thousand years have upheld their descent from the Apostle's disciples. There also we have what has been believed from immemorial antiquity to be the tomb of St. Thomas, with various lithic remains of pre-Portuguese Christianity around Madras. South India has a remarkably ancient tradition of St. Thomas; and it is a living tradition, not a dead legend. It can be traced back at least to the sixth century a.d., and it still lives in popular memories, not only of Christians, but of others not recognizing the claims of Christianity. The existence of this tradition is known and recognized; but no organized attempt has yet been made to explore it.

Petrogenesis of Silurian ultramafic–mafic plutons in southern Jiangxi: implications for the Wuyi–Yunkai orogen, South China

2020 ◽  
pp. 1-16
Author(s):  
Jie Yang ◽  
Wei Liu ◽  
Zuozhen Han ◽  
Zuoxun Zeng ◽  
Le Wan ◽  
...  
Keyword(s):  
South China ◽  
Lithospheric Mantle ◽  
First Episode ◽  
Jiangxi Province ◽  
South China Block ◽  
The South ◽  
Mafic Rocks ◽  
Formation And Evolution ◽  
Early Palaeozoic ◽  
T Values

Abstract The South China Block is one of the largest continental blocks located on the East Asian continent. The early Palaeozoic Wuyi–Yunkai orogen of the South China Block (known as the Caledonian orogen in Europe) is a major orogenic belt in East Asia and represents the first episode of extensive crustal reworking since Neoproterozoic time. Although this orogen is key to deciphering the formation and evolution of the South China Block, details about the orogen remain poorly defined. The Songshutang and Wushitou ultramafic–mafic units in southern Jiangxi Province, South China, have 206Pb–238U ages of c. 437 Ma, suggesting a Silurian formation age. All the Songshutang and Wushitou ultramafic–mafic rocks show relatively flat chondrite-normalized rare earth element patterns, depletions in Nb, Ta, Zr, Hf and Ti, and low ϵNd(t) values from −9.12 to −5.49 with negative zircon ϵHf(t) values from −10.84 to −2.58, resembling a typical arc magma affinity. Geochemical and isotopic data indicate that the newly identified ultramafic–mafic rocks, along with the reported Silurian mafic rocks in South China, possibly originated from the similar partial melting of an ancient subducted slab, fluid/sediment and metasomatized lithospheric mantle with varying degrees of fractional crystallization. In conjunction with other records of magmatism and metamorphism in South China, a late-orogenic extensional event led to the melting of the sub-continental lithospheric mantle in Silurian time and generated ultramafic–mafic rocks with a limited distribution along the Wuyi–Yunkai orogen and widespread late-orogenic granitic plutons in the South China Block.

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