Seismic stratigraphy of the northern New Guinea basin : insight into the tectonic evolution of a segmenting basin

2018 ◽  
Author(s):  
J.D. Pigott
Keyword(s):  
Tectonic Evolution ◽  
New Guinea ◽  
Seismic Stratigraphy ◽  
Insight Into

A late Cisuralian (early Permian) brachiopod fauna from the Taungnyo Group in the Zwekabin Range, eastern Myanmar and its biostratigraphic, paleobiogeographic, and tectonic implications

2021 ◽  
pp. 1-31
Author(s):  
Hai-peng Xu ◽  
Kyi Pyar Aung ◽  
Yi-chun Zhang ◽  
G.R. Shi ◽  
Fu-long Cai ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Cold Water ◽  
Water Environment ◽  
Climatic Conditions ◽  
Early Permian ◽  
The North ◽  
Southern Thailand ◽  
Brachiopod Fauna ◽  
Insight Into ◽  
Different Parts

Abstract The tectonic evolution of the Sibumasu Block during the Permian remains controversial, and Permian faunas and their paleobiogeographic affinities provide some insight into its paleogeographic and tectonic evolutionary histories. In this paper, a new brachiopod fauna dominated by Spinomartinia prolifica Waterhouse, 1981 is described from the uppermost part of the Taungnyo Group in the Zwekabin Range, eastern Myanmar. This brachiopod fauna includes 23 species and its age is well constrained as late Kungurian by the associated conodonts, i.e., Vjalovognathus nicolli Yuan et al., 2016 and Mesogondolella idahoensis (Youngquist, Hawley, and Miller, 1951), contrary to the late Sakmarian age given to the same brachiopod faunas previously reported from southern Thailand and Malaysia. Based on comprehensive comparisons of the Cisuralian brachiopod faunas and other data in different parts of the Sibumasu Block, we consider that they are better subdivided into two independent stratigraphic assemblages, i.e., the lower (earlier) Bandoproductus monticulus-Spirelytha petaliformis Assemblage of a Sakmarian to probably early Artinskian age, and the upper (younger) Spinomartinia prolifica-Retimarginifera alata Assemblage of a late Kungurian age. The former assemblage is a typical cold-water fauna, mainly composed of Gondwanan-type genera, e.g., Bandoproductus Jin and Sun, 1981, Spirelytha Fredericks, 1924, and Sulciplica Waterhouse, 1968. The latter assemblage is strongly characterized by an admixture of both Cathaysian and Gondwanan elements, as well as some genera restricted to the Cimmerian continents. Notably, the spatial distribution pattern of these two separate brachiopod assemblages varies distinctly. The Sakmarian cold-water brachiopod faunas have been found in association with glacial-marine diamictites throughout the Sibumasu Block including both the Irrawaddy and Sibuma blocks. In contrast, the Kungurian biogeographically mixed brachiopod faunas are only recorded in the Irrawaddy Block, unlike the Sibuma Block that contains a contemporaneous paleotropical Tethyan fusuline fauna. Thus, it appears likely that by the end of Cisuralian (early Permian), the Sibumasu Block comprised the Irrawaddy Block in the south with cool climatic conditions, and the Sibuma Block in the north with a temperate to warm-water environment, separated by the incipient Thai-Myanmar Mesotethys.

Post-Jurassic tectonic evolution of Papua New Guinea

1989 ◽  
Vol 162 (3-4) ◽  
pp. 291-302 ◽  
Author(s):  
Andrew B. Cullen ◽  
John D. Pigott
Keyword(s):  
Papua New Guinea ◽  
Tectonic Evolution ◽  
New Guinea

Thermochronologic constraints on the tectonic evolution of active metamorphic core complexes, D'entrecasteaux Islands, Papua New Guinea

Tectonics ◽  
1993 ◽  
Vol 12 (3) ◽  
pp. 611-628 ◽  
Author(s):  
Suzanne L. Baldwin ◽  
Gordon S. Lister ◽  
E. June Hill ◽  
David A. Foster ◽  
Ian McDougall
Keyword(s):  
Papua New Guinea ◽  
Tectonic Evolution ◽  
New Guinea ◽  
Metamorphic Core Complexes ◽  
Metamorphic Core

scholarly journals Managing Nitrogen, Potassium, and Boron in New Guinea Impatiens: Is More Better?

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 777B-777
Author(s):  
Dharmalingam S. Pitchay* ◽  
Jonathan M. Frantz ◽  
Jonathan M. Locke ◽  
Charles Krause
Keyword(s):  
New Guinea ◽  
Production Costs ◽  
Plant Performance ◽  
Nutrient Deficiencies ◽  
Tissue Samples ◽  
Wide Range ◽  
New Guinea Impatiens ◽  
Reflectance Measurements ◽  
Insight Into

Growers tend to over fertilize their plants as a way to minimize the likelihood of encountering nutrient deficiencies that would reduce the quality of their plants. Much of the nutrition literature focuses on the nutritional extremes namely of toxicity and deficiency. Once plants get to this stage, little can be done to correct the problem. Characteristics of plant performance in super-optimal conditions, yet below toxic levels, is less well known, and needs to be developed to help growers identify problems in their production practices before they impact sales. New Guinea Impatiens were grown over a wide range of N, K, and B levels, from 15% to 400% full strength Hoagland's solution for each nutrient after establishing transplanted rooted cuttings in a peat: perlite soilless media. Plants were grown for four weeks during treatment, during which time the flowers were pinched. After only 2 weeks of treatment, plants with 200% and 400% N were significantly shorter than control plants and plants with 15% N. Reflectance measurements and photographs were made twice a week. At the end of the four weeks, plant tissue was analyzed for form of N, root development and structure, and leaf area. Tissue samples were also analyzed with SEM and energy dispersive X-ray analysis to determine changes in nutrient location and tissue structure. This data provides insight into the nutrition economy of plants in general, tests the use of reflectance spectrometry as a method of detecting super-optimal fertilizer concentrations, and will help growers optimize their fertilization requirements to reduce production costs yet maintain high plant quality.

scholarly journals Ancient genetic divergence in bumblebee catfish of the genus Pseudopimelodus (Pseudopimelodidae: Siluriformes) from northwestern South America

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9028
Author(s):  
José D. Rangel-Medrano ◽  
Armando Ortega-Lara ◽  
Edna J. Márquez
Keyword(s):  
South America ◽  
Genetic Divergence ◽  
Tectonic Evolution ◽  
Valid Species ◽  
Species Discovery ◽  
The Andes ◽  
First Time ◽  
Evolutionary Lineages ◽  
Insight Into ◽  
Molecular Clock Dating

Pseudopimelodus is a Neotropical genus of bumblebee catfish, composed of four valid species occurring in both trans- and cis-Andean rivers of South America. The orogeny of the Andes has led to diversification in the genus Pseudopimelodus in Colombia. This study analyzed partial sequences of mitochondrial cox1 and nuclear rag2 genes to test the hypothesis that the species, nominally recognized as P. schultzi and P. bufonius in Colombia, correspond to more than two different evolutionary lineages. Results indicate high levels of genetic divergence among individuals of nominal P. schultzi and P. bufonius, from trans- and cis-Andean basins in Colombia. In addition, five divergent lineages of Pseudopimelodus were confidently delimited by using a single-locus species-discovery approach and confirmed by species tree analyses. Additionally, molecular-clock dating showed that most diversification processes in Pseudopimelodus took place during the Miocene, when Andean tectonic evolution was occurring in northwestern South America. The present study provides, for the first time, phylogeographic insight into this Neotropical genus.

Tectonic evolution of the porphyry copper system at Yandera, Papua New Guinea

1978 ◽  
Vol 73 (5) ◽  
pp. 810-828 ◽  
Author(s):  
S. R. Titley ◽  
A. W. Fleming ◽  
T. I. Neale
Keyword(s):  
Papua New Guinea ◽  
Tectonic Evolution ◽  
Porphyry Copper ◽  
New Guinea

scholarly journals Insight into the Early Spread of Chloroquine‐ResistantPlasmodium falciparumInfections in Papua New Guinea

2005 ◽  
Vol 192 (12) ◽  
pp. 2174-2179 ◽  
Author(s):  
Rajeev K. Mehlotra ◽  
Gabriel Mattera ◽  
Kuldeep Bhatia ◽  
John C. Reeder ◽  
Mark Stoneking ◽  
...  
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Insight Into
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