 | | Journal (article/letter/editorial) | | the managing editor: In his iconic 1984 paper, “Coesite and pure pyrope in high-grade blueschists of the...study the Dora-Maira rocks? Mineralogist doing humble work: Christian Chopin at the pyrope– coesite locality...locality near Martiniana Po, Italy, ca. 1984. Interesting minerals even pave the dirt road. PHOTO COURTESY...the Western Alps, along with the Monte Rosa and Dora-Maira massifs), I went for a postdoc at Bochum with...years, Photomicrograph (crossed polarizers) of a coesite rimmed by palisade quartz in pyrope garnet. Picture |  | | Journal (article/letter/editorial) | | http://www.tandfonline.com/loi/tigr20 The UHP Unit in the Dora-Maira Massif, Western Alps a Christian Chopin...Chopin & Hans-Peter Schertl (1999) The UHP Unit in the Dora-Maira Massif, Western Alps, International Geology...Son. Inc. All rights reserved. The UHP Unit in the Dora-Maira Massif, Western Alps CHRISTIAN CHOPIN ...Abstract New results acquired in the coesite-bearing terrane of the Dora-Maira massif, Italian Western Alps,... indicate that the UHP unit extends over less than 45 km2 and is bounded by two lower-grade continental |  | | Journal (article/letter/editorial) | | Geochemistry of coesite-bearing ‘‘pyrope quartzite’’ and related rocks from the Dora-Maira Massif, Western...quartzite’’, various phengite-schist and jadeite-bearing rock intercalations, as well as for enclosing orthogneiss...from different localities within the southern Dora-Maira Massif is presented, in order to establish the...orthogneiss is usually peraluminous, has normative corundum, and may be best related to S-type granite protoliths...kinship to the enclosing orthogneiss. Jadeite-bearing rocks, which occur as conformable layers and boudins |  | | Journal (article/letter/editorial) | | fractionation in the coesite-bearing ‘pyrope quartzite’ and related rocks of the Dora-Maira Massif, Western...ultrahigh-pressure (UHP) metamorphic rocks from the Dora-Maira Massif as well as of their granitic country rocks...the retrograde breakdown of pyrope to a chlorite-bearing assemblage, these elements became mobilized and...the leucophyllite samples as well. Key-words: Dora-Maira, ‘pyrope quartzite’, whiteschist, UHP, mobility...Introduction located in the southern part of the Dora-Maira Massif, Western Alps (e.g., Chopin, 1984; Chopin |  | | Report (chapter) | | units. The allochthonous unit is composed of UHP rocks. The parautochthonous unit is represented by the...autochthonous unit includes Jurassic and Cretaceous sedimentary and igneous rocks. The reworked unit is characterized...the subducted continental materials. If the UHP unit is the piston to build up the orogenic belt, then...the UHP terranes. Although the first report of coesite from China (Xu, Z. 1987) was made three years later...Europe (Chopin 1984; Smith 1984), the Chinese coesite has attracted world-wide attention since the very |  | | Journal (article/letter/editorial) | | in this paper, refers to the blueschist-facies-bearing orogenic belt, which often includes many other...stabilities of diamond-graphite (Bundy, 1980), coesite-quartz (Bohlen and Boettcher, 1982), jadeite +...aragonite-bearing rocks often appear in the circum-Pacific and the Tethyan orogenic belts. Coesite- and (rarely)...(rarely) diamond-bearing metamorphic rocks are exposed within tectonic collages formed by continental-collision...metamorphism. The P / T estimate of glaucophane-bearing rocks is about 450° C and 9 kbar (Laird and Albee |  | Droop, Giles T. R., Karakaya, Muazzez �., Eren, Ya?ar, Karakaya, Necati (2005) Metamorphic evolution of blueschists of the Alt?nekin Complex, Konya area, south central Turkey. Geological Journal, 40 (2) 127-153 doi:10.1002/gj.1000 | Journal (article/letter/editorial) | | with metamorphism in a subduction zone. Lawsonite-bearing rocks in the southern part of the ophiolitic mélange...values than epidote blueschists elsewhere in the unit, hinting that the latter may consist of two or more...et al. 1999). The distribution of glaucophane-bearing rocks in Turkey was first described by Kaaden (1966)...Platform together with allochthonous, ophiolite-bearing assemblages (Özgül and Göncüoğlu 1998). It...Permian–L. Jurassic age are present at the base. This unit grades laterally and vertically into a thick sequence |  | ZHANG, R. Y., LIOU, J. G., OMORI, S., SOBOLEV, N. V., SHATSKY, V. S., IIZUKA, Y., LO, C.-H., OGASAWARA, Y. (2012) Tale of the Kulet eclogite from the Kokchetav Massive, Kazakhstan: Initial tectonic setting and transition from amphibolite to eclogite. Journal of Metamorphic Geology, 30 (5) 537-559 doi:10.1111/j.1525-1314.2012.00980.x | Journal (article/letter/editorial) | | INTRODUCTION The Kokchetav Massif [a diamond-bearing ultrahighpressure (UHP) metamorphic terrane], Kazakhstan...Most past studies focused on the western, diamond-bearing, part of the Kokchetav massif, and 2012 Blackwell...(Zhang et al., 1997), but it was the discovery of coesite in garnet from a pelitic schist (Shatsky et al...that confirmed UHP metamorphism in the Kulet area (unit II). Apart from a few dark-coloured eclogite bodies...650–750 C and 27–32 kbar, some bodies are in coesite eclogite zone, and others are in quartz eclogite |  | | Report (volume) | | Society from: The Geological Society Publishing House Unit 7, Brassmill Enterprise Centre Brassmill Lane Bath...are present, particularly in the secondary load-bearing region of the mid-crust (Fig. 2), these will preferentially...Proterozoic in age. In contrast, the Basin and Range Province of the western US, for example, demonstrates extensive...(Smith 1984; Chopin 1987; Wang et al 1989) contain coesite, implying that continental crust has been buried...(CEFT). They should be distinguished from eclogite bearing terranes formed within subduction zone complexes |  | | Report (volume) | | Society from: The Geological Society Publishing House Unit 7, Brassmill Enterprise Centre Brassmill Lane Bath...in China: a case-study from Wutaishan, Shanxi Province, demonstrating the application of precise SHRIMP...subducted to > 150 km, creating the diamondand coesite-bearing eclogitic rocks of Dabie-Sulu. These are rocks...in China: a case-study from Wutaishan, Shanxi Province, demonstrating the application of precise SHRIMP...Traditional subdivision of the Wutai 'Group' of Shanxi province, based on Tian (1991) and Ma & Bai (1998). The |  | | Report (volume) | | Society from: The Geological Society Publishing House Unit 7, Brassmill Enterprise Centre Brassmill Lane Bath...faults within the Colfiorito fault system (central Italy) AUSTIN, N. J. & KENNEDY,L. A. Textural controls...subduction and exhumation: an example from the Ulten Unit, Tonale Nappe, Eastern Austroalpine 159 RAIMBOURG...locality near Sestri Levante in the Liguride units, Italy (see hammer for scale). model also allows the introduction...faults within the Colfiorito fault system (central Italy) F. M I R A B E L L A , V. B O C C A L I & M. R |
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