Journal of Himalayan Earth Sciences最新文献

{"title":"SHRIMP zircon ages of eclogites in the Stak massif, northern Pakistan.","authors":"N. Riel, K. Hattori, S. Guillot, N. Rayner, B. Davis, M. Latif, A. Kausar","doi":"10.3126/HJS.V5I7.1308","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1308","url":null,"abstract":"DOI = 10.3126/hjs.v5i7.1308 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.119-120","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"6 1","pages":"119-120"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81508585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geohistory of Tso-Morari Crystalline, Eastern Ladakh, India: a plausible model for ultra-high pressure rocks in the Himalaya","authors":"R. Sharma","doi":"10.3126/HJS.V5I7.1321","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1321","url":null,"abstract":"The Tso-Morari Crystalline (TMC), eastern Ladakh, is located between the ophiolitic rocks of the Indus-Tsangpo Suture Zone (ITSZ) in the north and the Zanskar sedimentary unit (Tethyan sedimentary zone) in the south. The TMC represents the northern Himalayan Crystalline. It is composed of quartzo-feldspathic gneiss, mostly augen-gneiss, derived from granitoids. Associated with these gneisses are the biotite schist and sillimanite-kyanite gneiss, which occur as discontinuous metasedimentary layers concordant with the banding of the gneisses. The Tso-Morari gneiss complex is heterogeneously deformed and show magmatic to mylonitic texture with dominant S-surface that is domed by NW-SE antiform. The TMC gneisses form the core of this vast dome. The Tso-Morari dome plunges in the west under metasediments, mainly garnet-bearing metapelites of the Phe or Haimanta Formation (Precambrian to Cambrain age). The UPb isotope on zircons, single grain as well as small multigrain fractions from the gneiss (deformed granite) yielded magmatic age of 479±2 Ma (Girard and Bussy 1999). Similar age is also reported in the nearby located Polokongla granite. The transition between the Polokongla granite and the Tso-Morari gneiss is gradual, devoid of any intrusive contact with the gneiss. This field occurrence together with their geochemical similarities, identical zircon morphology and same age, suggest that the Polokongla granite is the undeformed facies of the Tso-Morari gneiss. Other granite in the terrain is the Rupshu metagranite which is metaluminous with U-Pb zircon age of 482.5±1 Ma (Girard and Bussy 1999). Strikingly, there are no aplite or pegmatite dykes related to the granite-gneiss association in the TMC terrain. The Tso-Morari gneiss complex encloses eclogitic lenses (1–13 m long and 0.5–4 m thick), aligned parallel to the gneissic fabric. The eclogites, mostly retrograded, are scattered throughout the complex. They are found mainly within the Tso-Morari gneiss and also in the first few hundred meters of metasediments above, which prompted Steck et al. (1998) to designate the Tso-Morari complex as Tso-Morari Nappe – a tectonic unit of high pressure metamorphism. Because of the eclogitic lenses within the TsoMorari dome, it is obvious that the high pressure metamorphism also affected the Tso-Morari gneisses. The garnet (45-55 vol.%) in the eclogites is rimmed by glaucophane (5-7 vol.%) paragonite (<10%), and omphacite (25-35 %). These minerals also form matrix in the eclogitic rock (Sachan et al., 1999). Glaucophane","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"7 1","pages":"139-140"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81605488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long Term GPS Deformation Rates in the Karakoram terrane of Ladakh","authors":"S. Jade, V. Gaur, M. Vijayan, P. Kumar","doi":"10.3126/HJS.V5I7.1335","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1335","url":null,"abstract":"DOI = 10.3126/hjs.v5i7.1335 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.156","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"58 1","pages":"156-156"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82785535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-coaxial heterogeneous deformation in the Num orthogneiss (Arun valley, Mt. Makalu area, eastern Nepal)","authors":"R. Carosi, C. Frassi, C. Montomoli, P. Pertusati, C. Groppo, F. Rolfo, D. Visonà","doi":"10.3126/HJS.V5I7.1241","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1241","url":null,"abstract":"DOI = 10.3126/hjs.v5i7.1241 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.34","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"205 1","pages":"34-34"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83573552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining the Tectonic Wedging Hypothesis in the NW India Himalaya","authors":"A. Alexander, G. Webb, A. Yin","doi":"10.3126/HJS.V5I7.1343","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1343","url":null,"abstract":"DOI = 10.3126/hjs.v5i7.1343 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.168","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"24 1","pages":"168-168"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82226843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochronologic, structural and metamorphic constraints on the evolution of the South Tibetan detachment system, Bhutan Himalaya","authors":"D. Kellett, D. Grujic, I. Coutand, C. Warren","doi":"10.3126/HJS.V5I7.1275","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1275","url":null,"abstract":"HIMALAYAN JOURNAL OF SCIENCES | VOL. 5 | ISSUE 7 (SPECIAL ISSUE) | 2008 78 Geodynamic models of collisional orogenesis provide predictions about the provenance and pressure-temperature-time-deformation (PTtD) history of material within exposed crustal-scale structures. Focused field studies across relevant natural analogues provide the requisite data against which these models must be tested. Here we present structural, geochronologic, thermochronologic, thermometric and thermo-barometric data from transects across the Geochronologic, structural and metamorphic constraints on the evolution of the South Tibetan detachment system, Bhutan Himalaya","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"1 1","pages":"78-79"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82362719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Climate change from high elevation sites of North West Himalaya based on tree ring data.","authors":"Santosh K. Shah, A. Bhattacharyya, V. Chaudhary","doi":"10.3126/HJS.V5I7.1320","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1320","url":null,"abstract":"The analysis of tree-ring data of Siver fir (Abies pindrow [Royale] Spach.) and Himalayan pine (Pinus wallichiana A.B. Jackson) from the sub-alpine forest from Gangotri glacier region, Northwestern Himalayan signifies the importance of AugustSeptember temperature in controlling the growth of these trees. Mean temperature in each year for these two months has been reconstructed from A.D. 1995 up to A.D. 1773 based on ring-width and density data. The calibration model explains 44% variance in the instrumental data (1902-1987). The reconstructed temperature series shows annual to multiyear fluctuations punctuated with","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"117 1","pages":"138-138"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84073621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New SHRIMP ages for Ladakh and Karakoram Batholiths - inherited zircons indicate involvement of older crust","authors":"T. Ahmad, L. White, M. Forster, T. Ireland, G. Lister","doi":"10.3126/HJS.V5I7.1230","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1230","url":null,"abstract":"DOI = 10.3126/hjs.v5i7.1230 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.19","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"59 1","pages":"19-19"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73675606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Paleogene record of Himalayan erosion; Burma and Bangladesh","authors":"Y. Najman, R. Allen, M. Bickle, M. BouDagher-Fadel, A. Carter, E. Garzanti, M. Paul, J. Wijbrans, E. Willett, G. Oliver, R. Parrish, S. H. Akhter, S. Andó, D. Barfod, E. Chisty, L. Reisberg, G. Vezzoli, J. Uddin","doi":"10.3126/HJS.V5I7.1288","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1288","url":null,"abstract":"DOI = 10.3126/hjs.v5i7.1288 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.94","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"37 1","pages":"94-94"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77313372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is the Ramgarh thrust equivalent to the Main Central thrust in central Nepal","authors":"K. Larson, L. Godin","doi":"10.3126/HJS.V5I7.1280","DOIUrl":"https://doi.org/10.3126/HJS.V5I7.1280","url":null,"abstract":"DOI = 10.3126/hjs.v5i7.1280 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.85","PeriodicalId":42873,"journal":{"name":"Journal of Himalayan Earth Sciences","volume":"97 1","pages":"85-85"},"PeriodicalIF":0.4,"publicationDate":"2008-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80898657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}