scholarly journals Occurrence of Permian palynofossils from the Saltoro Formation, Shyok-Suture-Zone, Ladakh Himalaya, India

2008 ◽  
Vol 5 (7) ◽  
pp. 113
Author(s):  
Ram Awatar

DOI = 10.3126/hjs.v5i7.1302 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.113

2021 ◽  
pp. 1-20
Author(s):  
I.M. Bhat ◽  
T. Ahmad ◽  
D.V. Subba Rao ◽  
N.V. Chalapathi Rao

Abstract The Ladakh Himalayan ophiolites preserve remnants of the eastern part of the Neo-Tethyan Ocean, in the form of Dras, Suru Valley, Shergol, Spongtang and Nidar ophiolitic sequences. In Kohistan region of Pakistan, Muslim Bagh, Zhob and Bela ophiolites are considered to be equivalents of Ladakh ophiolites. In western Ladakh, the Suru–Thasgam ophiolitic slice is highly dismembered and consists of peridotites, pyroxenites and gabbros, emplaced as imbricate blocks thrust over the Mesozoic Dras arc complex along the Indus Suture Zone. The Thasgam peridotites are partially serpentinized with relict olivine, orthopyroxene and minor clinopyroxene, as well as serpentine and iron oxide as secondary mineral assemblage. The pyroxenites are dominated by clinopyroxene followed by orthopyroxene with subordinate olivine and spinel. Gabbros are composed of plagioclase and pyroxene (mostly replaced by amphiboles), describing an ophitic to sub-ophitic textural relationship. Geochemically, the studied rock types show sub-alkaline tholeiitic characteristics. The peridotites display nearly flat chondrite-normalized rare earth element (REE) patterns ((La/Yb)N = 0.6–1.5), while fractionated patterns were observed for pyroxenites and gabbros. Multi-element spidergrams for peridotites, pyroxenites and gabbros display subduction-related geochemical characteristics such as enriched large-ion lithophile element (LILE) and depleted high-field-strength element (HFSE) concentrations. In peridotites and pyroxenites, highly magnesian olivine (Fo88.5-89.3 and Fo87.8-89.9, respectively) and clinopyroxene (Mg no. of 93–98 and 90–97, respectively) indicate supra-subduction zone (SSZ) tectonic affinity. Our study suggests that the peridotites epitomize the refractory nature of their protoliths and were later evolved in a subduction environment. Pyroxenites and gabbros appear to be related to the base of the modern intra-oceanic island-arc tholeiitic sequence.


2009 ◽  
Vol 104 (3) ◽  
pp. 188-191 ◽  
Author(s):  
Ngo Xuan THANH ◽  
Tetsumaru ITAYA ◽  
Krishnan SAJEEV ◽  
Talat AHMAD ◽  
Satoru KOJIMA ◽  
...  

1970 ◽  
Vol 5 (7) ◽  
pp. 18
Author(s):  
T Ahmad ◽  
S Sivaprabha ◽  
S Balakrishnan ◽  
NX Thanh ◽  
T Itaya ◽  
...  

DOI = 10.3126/hjs.v5i7.1229 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.18


1970 ◽  
Vol 5 (7) ◽  
pp. 167
Author(s):  
Igor M Villa ◽  
Julia De Sigoyer ◽  
Stéphane Guillot

DOI = 10.3126/hjs.v5i7.1342 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.167


2008 ◽  
Vol 2 (4) ◽  
pp. 112 ◽  
Author(s):  
Angel On Kee Chan ◽  
Jonathan C Aitchison ◽  
Bandengzhu Bandengzhu ◽  
Lan Hui

Himalayan Journal of Sciences Vol.2(4) Special Issue 2004 pp. 112


1970 ◽  
Vol 5 (7) ◽  
pp. 63
Author(s):  
Réjean Hébert ◽  
Lesage Guillaume ◽  
Bezard Rachel ◽  
Carl Guilmette ◽  
Émilie Bédard ◽  
...  

DOI = 10.3126/hjs.v5i7.1265 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.63


1970 ◽  
Vol 5 (7) ◽  
pp. 54 ◽  
Author(s):  
Owen R Green ◽  
Michael P Searle ◽  
Richard I Corfield ◽  
Richard M Corfield

DOI = 10.3126/hjs.v5i7.1256 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.54


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