Dehydration-melting of amphibolite at 10 kbar: the effects of temperature and time

Wolf, Michael B.; Wyllie, Peter J.

doi:10.1007/bf00320972

Cited by 814 publications

(372 citation statements)

References 47 publications

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“…남중국지괴 현무암류는 북 중국지괴나 충돌대 현무암에 비해서는 보다 높은 방 사기원 Pb 동위원소비를 가진다. 선행 실험결과 (Rushmer, 1991;Wolf and Wyllie, 1994;Rapp and Watson, 1995;Rapp et al, 2003;Xu et al, 2006)에 의하면 고철질의 하부지각이 부 분용융 될 경우 화강암류와 같은 규장질 마그마가 생 성되므로 연구 대상인 현무암질 암석이 하부대륙지각 의 부분용융 산물이라고 보기는 어렵다. 전술한 바와 같이 위 암석들의 Sr-Nd 동위원소성분에서 대륙지각 혼염의 가능성은 발견되지 않으므로 이와 같은(하부) 대륙지각 성분의 흔적은 근원 맨틀 즉, 암석권맨틀에 내재되어 있는 특성이라고 추론할 수 있다.…”

Section: 제될 수 있다unclassified

Petrogenesis of Early Cretaceous Magmatism in Eastern China and the Gyeongsang Basin, Korean Peninsula

Choi¹

2016

The Journal of the Petrological Society of Korea

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핵심어: 백악기초기, 동중국, 경상분지, 현무암, 암석권맨틀Abstract: Geochemical characteristics of the Early Cretaceous igneous rocks from eastern China and the Gyeongsang Basin, Korean Peninsula has been summarized. They have wide range of lithological variation with extrusive picrite-basalt-andesite-trachyte-rhyolite and lamprophyre, and intrusive gabbro-dioritemonzonite-syenite-granite and diabase in eastern China, mostly belonging to the high-K calc-alkaline or shoshonitic series. The volcanic rocks intercalated with the Hayang Group sedimentary assemblages in the Gyeongsang basin are high-K to shoshonitic basaltic trachyandesites. The Early Cretaceous basaltic rocks studied mostly fall within the field of within-plate basalts on the Zr/Y-Zr and Nb-Zr-Y tectonic discrimination diagrams. On a Sr-Nd isotope correlation diagram, basaltic rocks from the North China block (NCB) and the continent-continent collision zone (CZ) between the North and South China blocks plot into the enriched lower right quadrant along the extension of the mantle array. The initial Pb(t) correlation. Meanwhile, the SCB basaltic

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Section: 제될 수 있다unclassified

Petrogenesis of Early Cretaceous Magmatism in Eastern China and the Gyeongsang Basin, Korean Peninsula

Choi¹

2016

The Journal of the Petrological Society of Korea

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“…Partial melts (WW) of low-K and Na, high-Mg and Ca basalt at 10 kbar, from Wolf and Wyllie, 1994. Zhantang andesites.…”

Section: Compositional Comparison Of the Zhantang Andesites And Expermentioning

confidence: 99%

“…amphibole ± plagioclase as residual phases are generally present in melting experiments at pressures of ≥10 kbar and temperatures of 850-1150°C (Rapp et al, 1991;Winther and Newton, 1991;Sen and Dunn, 1994;Wolf and Wyllie, 1994;Rapp, 1995;Rapp and Watson, 1995;Winther, 1996). Rapp et al (1999) pointed out that adakitic liquids are produced by melting of hydrated basalt at 10-40 kbar.…”

Section: Compositional Comparison Of the Zhantang Andesites And Expermentioning

confidence: 99%

“…Their starting materials R 2 , R 3 and R 4 (Rapp and Watson, 1995), S (Sen and Dunn, 1994), and W (Winther, 1996) (see Table 4) are compositionally close to the average N-MORB (Hofmann, 1988), except that the R 2 has slightly higher Na 2 O content and the S has higher K 2 O content than the average N-MORB. The third group (14 samples, named as WW) is the data of Wolf and Wyllie (1994) at 10 kbar. Its starting material is a low-K and Na, high-Mg and Ca amphibolite.…”

Section: Compositional Comparison Of the Zhantang Andesites And Expermentioning

confidence: 99%

“…1 (alkali-rich basalt), , and , respectively, in the Table 1 of Rapp and Watson (1995); S: basaltic amphibolite from Sen and Dunn (1994); W: synthesized tholeiite from Winther (1996); WW: low-Na and K, high-Mg and Ca amphibolite from Wolf and Wyllie (1994); N-MORB: average N-MORB from Hofmann (1988) (Fig. 9).…”

Section: Compositional Comparison Of the Zhantang Andesites And Expermentioning

confidence: 99%

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Extremely high-Na adakite-like magmas derived from alkali-rich basaltic underplate: The Late Cretaceous Zhantang andesites in the Huichang Basin, SE China.

Xiong

et al. 2003

Geochem. J.

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The Zhantang andesites, which erupted in the Late Cretaceous Huichang Basin of SE China interior, were associated with the Late Mesozoic lithospheric extension and basaltic underplating. They are highNa (6.59-8.46 wt% Na 2 O), high-Al trondhjemitic rocks with high Sr and Ba, low Y and HREE, and high Sr/Y and La/Yb ratios, similar to modern adakites. However, they are much higher in Na 2 O but lower in CaO than adakites. Their εNd(T) values of -2.3 to -3.8 and initial 87 Sr/ 86 Sr ratios of 0.707 to 0.708 are also significantly different from those of adakites with MORB-like isotopic compositions. These chemical and isotopic features, along with the tectonic setting, suggest that they were not produced by partial melting of subducting slab.The Zhantang adakite-like magmas may be derived from underplated basaltic lower crust, but require a compositionally peculiar basaltic protolith to account for their extremely high-Na and low-Ca feature. They are compositionally comparable to the experimentally produced partial melts of alkali-rich basalt. We therefore interpret them as the products of melting of an alkali-rich basaltic rock.

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Neoproterozoic to Paleozoic long-lived accretionary orogeny in the northern Tarim Craton

et al. 2014

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The Tarim Craton, located in the center of Asia, was involved in the assembly and breakup of the Rodinia supercontinent during the Neoproterozoic and the subduction-accretion of the Central Asian Orogenic Belt (CAOB) during the Paleozoic. However, its tectonic evolution during these events is controversial, and a link between the Neoproterozoic and Paleozoic tectonic processes is missing. Here we present zircon U-Pb ages, Hf isotopes, and whole-rock geochemical data for the extensive granitoids in the western Kuruktag area, northeastern Tarim Craton. Three distinct periods of granitoid magmatism are evident: circa 830-820 Ma, 660-630 Ma, and 420-400 Ma. The magma sources, melting conditions (pressure, temperature, and water availability), and tectonic settings of various granitoids from each period are determined. Based on our results and the geological, geochronological, geochemical, and isotopic data from adjacent areas, a long-lived accretionary orogenic model is proposed. This model involves an early phase (circa 950-780 Ma) of southward advancing accretion from the Tianshan to northern Tarim and a late phase (circa 780-600 Ma) of northward retreating accretion, followed by back-arc opening and subsequent bidirectional subduction (circa 460-400 Ma) of a composite back-arc basin (i.e., the South Tianshan Ocean). Our model highlights a long-lived accretionary history of the southwestern CAOB, which may have initiated as part of the circum-Rodinia subduction zone and was comparable with events occurring at the southern margin of the Siberian Craton, thus challenging the traditional southward migrating accretionary models for the CAOB.

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Dehydration-melting of amphibolite at 10 kbar: the effects of temperature and time

Cited by 814 publications

References 47 publications

Petrogenesis of Early Cretaceous Magmatism in Eastern China and the Gyeongsang Basin, Korean Peninsula

Petrogenesis of Early Cretaceous Magmatism in Eastern China and the Gyeongsang Basin, Korean Peninsula

Extremely high-Na adakite-like magmas derived from alkali-rich basaltic underplate: The Late Cretaceous Zhantang andesites in the Huichang Basin, SE China.

Neoproterozoic to Paleozoic long-lived accretionary orogeny in the northern Tarim Craton

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