Mesozoic Magmatism of Macao and Hong Kong

September 21, 2018

MESOZOIC MAGMATISM OF MACAO AND HONG KONG

Mesozoic magmatism of Macao and Hong Kong in the context of SE China geodynamics
澳門與香港的中生代岩漿作用 (含前往路環的野外行程)

Date: 22nd April 2017 (Saturday) – Meeting and workshop + Field trip

Venue: Speakers Hall and Science lab of the Institute for Science and Environment, Rua de Londres16, Macau SAR | 澳門外港新填海區倫敦街16號(環宇豪庭), MacauOrganized by the Institute for Science and Environment – University of Saint Joseph (澳門聖若瑟大學 – 科學及環境研究所) and The Geological Society of Hong Kong (香港地質學會)

 

Organising Committee
Ágata Alveirinho Dias (Chair, ISE)
Paul Cheung (Co-Chair, GSHK)
Varon Lou (ISE):varon.lou@usj.edu.mo
Peggy Lam (GSHK):gshkpb@gmail.com
Pedro Quelhas (ISE)


Fees:
MOP 190 / HKD 185 (Includes transportation for the field trip, lunch and coffee breaks)

Application Deadline: 20th April 2017, 6pm

E-mail contacts: Varon Lou (ISE, Macau): varon.lou@usj.edu.mo | Leung Wai Kin (GSHK, HK): gshkpb@gmail.com

Target participants: Earth science researchers, students, high school teachers, civil engineers and others interested in learning more about earth sciences and, in particular, to understand the geological history of Macau, Hong Kong and surrounding areas.

Language: English

NOTE: please plan to arrive at the workshop room 10 to 15 minutes before the workshop start time

Description:

During Mesozoic ages, SE China region, where Macao and Hong Kong are located, was affected by plutonic and volcanic events generated during the Indosinian (Triassic) and Yanshanian (Jurasic-Cretaceous) orogenies, overprinting all previous events in the South China Fold Belt.

This event aims to contribute towards a deeper understanding of the geology of Macao and Hong Kong. It will be discussed the genesis and evolution of the Mesozoic magmatic rocks observed in this area and how their geodynamic evolution relates to each other.

Local and international researchers, with a large experience in the study of magmatic rocks and in the geology of this region, will give key talks to share their knowledge on the geological features of Macao and Hong Kong within the broader context of SE China. During this session, there will be a workshop where you can have the opportunity to observe rock samples and correspondent microscopy thin sections from this region. The event will culminate with a field trip to Coloane (Macao).

PROGRAM

Morning Program:

9:30H

Opening session (ISE, USJ + GSHK): Ágata Dias and Paul Cheung
USJ Speakers Hall
10:00H
Talks
12:00H
Observation/exhibition of rocks from Macau and Hong Kong
13:00H
Meeting lunch

Afternoon Program:

14:20H
Briefing for the field trip (Speakers hall)
 14:45H-18:00H

Field trip, lead by Pedro Quelhas
and Ágata Dias

Meeting point: In front of USJ (NAPE1 – Rua de Londres 16, Block B)

 18:30HArrival to USJ
Certificate of Attendance will be provided at the end of the event.

SPEAKERS

9:30h - Opening talk (by Ágata Alveirinho Dias and Paul Cheung)

Ágata Alveirinho has a PhD in Geology and is Associate Professor at the Institute of Science and Environment USJ, in Macau. She is also a collaborating researcher at Instituto Dom Luis (Associate Lab) of the University of Lisbon, in Portugal. Since her graduation, followed by a MSc, a PhD and two postdoctorates, she has been working in Geology, publishing papers related with cartography, petrology, geochemistry and metallogeny. Along her research activities, she has been collaborating with different universities and research institutions around the world, such as IFREMER, Brest, France; ETH, Zurich, Switzerland; NOC, Southampton, UK; University of Bergen, Norway; FCUL, Lisbon, Portugal and GIGCAS, Guangzhou, China. She has been studying deep-sea hydrothermal processes and, more recently, she has been also developing work on the petrology and geochemistry of igneous rocks from Macau and SE China. She is currently the coordinator of a project funded by the Macao Science and Technology Development Fund, FDCT, to study the geological history of Macao and to update the geological map of this region.

Paul CHEUNG Chi Tak is the Chairman of the Professional Branch, Geological Society of Hong Kong and Vice President of the Geological Society of Hong Kong (GSHK). He serves as a Scrutineer for Chartered Geologist of the Geological Society of London and he was part-time lecturer in Engineering Geology with the Civil Engineering Department of Chu Hai College and in Soil Mechanics with the Civil Engineering Department of Hong Kong Polytechnic (High Certificate Course). In his early career, he worked for a British Consultants firm in Hong Kong as a graduate geologist/geotechnical engineer. Then worked as a mapping geologist with Mass Transit Railway for the site formation works on Kornhill Development. He then joined the then Geotechnical Control Office, Hong Kong Government in 1985 until retirement in 2015. Paul Cheung graduated with BSc in Geology with the National Taiwan University and MSc in geochemistry of gabbroic rocks with the University of Windsor, Canada. He also got a postgraduate Certificate in Business Administration with the Hong Kong City University. He carried out research on the Quaternary Marine Depositional Environment of Hong Kong with the Geography Department of the Chinese University.

10:00h - Reconstructing the architecture of the late Mesozoic Southeast China continental margin (by Rod Sewell)

Rod Sewell has been a member of the Hong Kong Geological Survey for over 27 years. Following completion of his PhD on an extinct volcano in New Zealand, he worked for the New Zealand Geological Survey studying volcanic geology and tectonics, with excursions to the Antarctic and USA. He has coauthored several books, papers, and maps on the geology of Hong Kong, New Zealand and Antarctica. Rod is Chief Training Geologist in the GEO/CEDD and is an Honorary Professor in the Department of Earth Sciences at the University of Hong Kong. He currently heads the Hong Kong Geological Survey, GEO/CEDD.

About the talk
A variety of tectonic models have been proposed for the origin of Jurassic (199-145 Ma) magmatism in SE China. These include both a mature continental arc setting and a within-plate setting. Among these models, subduction of the Palaeo-pacific plate along a convergent margin has the most support. However, not much is known about the structure of the convergent margin complex. Here, we use precisely-dated, well-studied, tectonostratigraphic terranes in Hong Kong, together with geochemistry and geochronology of granitic rocks, to help reconstruct the architecture of the Southeast China convergent margin in the late Middle Jurassic.

10:30h - Evolution of the late Mesozoic magmatic systems in Hong Kong: New perspectives from zircon geochronology and trace element analyses (by Denise Tang)

Denise graduated from the Department of Earth Sciences, HKU and joined the Geotechnical Engineering Office (GEO) as a graduate trainee in 1999. Since then, she has dedicated herself to the geology profession, and been working at the GEO for over 15 years. Denise co-authored the popular geology book “Hong Kong Geology – A 400-million year journey”, which has been one of the GEO’s best seller publications since its publication in 2009. Denise obtained her MPhil degree from the Department of Earth Sciences HKU in 2007, and has recently completed her PhD study at the Victoria University of Wellington, New Zealand.

About the talk
Spatial and temporal correlation of four late Mesozoic volcanic centres and their sub-volcanic plutons are well-constrained in Hong Kong. Of the four volcanic episodes, the youngest caldera-forming eruptions (of c. 140 million years ago) from the High Island Caldera have been interpreted to be of super-eruption scale. Multiple techniques including field studies, zircon SIMS geochronology and trace element analyses have been employed to gain new insights into the evolution of these ancient volcanic systems. The results show that in individual large volcanic systems, source composition and temperature may change over millions of years, and thereby generate two distinctly different groups of volcanic and granitic products. In this talk, some latest findings of Hong Kong’s magmatic history and their implications to our understanding of Yanshanian orogeny will be presented.  

11:00h - Mesozoic magmatism in Macao: What is known so far and future developments (by Pedro Quelhas)

Pedro Quelhas graduated in geology from the Faculty of Sciences of the University of Lisbon (FCUL) and is currently a PhD student in the Institute of Science and Environment from USJ, where he is developing his research work on the petrology and geochemistry of Igneous Rocks from Macao: Implications for the Crustal Evolution of Southern China, funded by FDCT in Macau. His main interests are focused on igneous petrology, geochemistry and mineralogy. Before being enrolled in the PhD program he also did small research works on petrographic and geochemical features of the Lisbon Volcanic Complex and the dykes from Sines Massif, in Portugal. He was also lecturer at the Geology Department of FCUL.

About the talk
Although small in area (~30 Km2), our data shows that Macao territory has a wide range of granitic facies intruded by subordinate intermediate to acid dykes. Textural, mineralogical and geochemical variability of these rocks suggests different degrees of magmatic evolution in which fractional crystallization played a major role. Previous ages determined for Macao granites (Jurassic to Cretaceous) and their petrographic and geochemical features are similar to many granites occurring in neighboring areas, pointing to a genetic association with the Late Mesozoic magmatism related with the Yanshanian Orogeny. However, it is still not clear with the available data if these rocks were generated in the same magmatic event and/or derived from the same source. Isotopic data are now being acquired and precise dating of the different magmatic units will be undertaken soon, which will provide more answers for the local and regional magmatic history.

11:30h - Hydrothermal events in Hong Kong: constraints on timing and depth of occurrence (by Chan Lung)

Prof Chan Lung Sang is currently Principal of HKU SPACE Community College and HKU SPACE-Po Leung Kuk Stanley Ho Community College, as well as professor in Department of Earth Sciences at HKU. He received his bachelor degree from CUHK and his Masters and PhD in geology and geophysics from University of California-Berkeley. He taught geology at the University of Wisconsin for 10 years before he joined The University of Hong Kong in 1994. His research interests include the tectonics and geology of South China and applied geophysics. He has been actively promoting science education in Hong Kong. Currently he is a member of the Board of Directors of the HK Academy for Gifted Education and scientific advisor of HK Observatory. He chaired the Geological Society for the period 2001-2005 and was invited to be a guest host in several television documentaries on earth science subjects. In 2010, he was bestowed the first University Distinguished Teaching Award by The University of Hong Kong and the Best Original Research Award by HK Medical Journal in 2013.

About the talk
The Jurassic-Cretaceous magmatism in Hong Kong region was followed by multiple hydrothermal episodes during the Late Cretaceous through Cenozoic. The hydrothermal events resulted in deuteric mineralisation and silicification of sedimentary layers. A few hydrothermal episodes are found to postdate fold and thrust events as well as the Eocene Ping Chau formation. Authigenic aegirine and the cherty siltstone layer found in the lower member of Ping Chau formation are attributable to hydrothermal events with temperatures estimated at about 300oC. Stromatolitic structures are found to have been preserved in the silicified siltstone. In Double Island, folded sediments of the Pat Sin Leng formation were silicified within a, speculatively, breccia pipe. An examination of the hydraulic fractures in some quartz dikes on Lantau Island has enabled us to estimate the depth at which the fracturing occurred, based on thermodynamic consideration of the phase relation between water and gas as well as the geostatic gradient of the crust. The talk presents an overview of interesting hydrothermal features in Hong Kong and a discussion of their tectonic significance.

 ISE Facebook page (Institute of Science and Environment/科學及環境研究所): HERE 

Organisers

       

Sponsor

 
December 7, 2017

Public lecture: Hormonal Pheromones in Tilapia

Hormonal Pheromones in Tilapia, by Prof. Adelino Canário

Prof. Adelino Canário
(University of Algarve, Portugal and Shanghai Ocean University, China)

ABOUT THE TALK

Communication and behaviour are tightly linked and fish use several sensory channels to communicate. Chemical communication is the most ancient form of communication but its role is often ignored because the substances involved are not known. Among the teleost fishes, cichlids are of special interest for the study evolution, for aquaculture and as invasive species in some parts of the world. In the Mozambique tilapia (Oreochromis mossambicus), reproduction and male aggression are mediated through urinary cues tactically released by dominant males. The olfactory potency of male chemical cues depends on the donors’ social rank. Females spawn preferentially with dominant males and increase sex steroid production in the presence of male chemical cues. Moreover, dominant males increase urination frequency to signal their dominance status to rivals and reduce male-male aggression. The identity and biological function of the most potent odorants released by dominant Mozambique tilapia males has been elucidated and are important tools to establish the associated neurobiological mechanisms and as potential tools for aquaculture and in population control.

ABOUT THE SPEAKER

Adelino V.M. Canario received is PhD from the University of East Anglia (Norwich, UK). He is professor of Cell Biology and Reproductive Physiology, Director of the Centre for Marine Sciences and leader of the Comparative Molecular and Integrative Biology group at the University of Algarve, and visiting professor (1000 Talents) at Shanghai Ocean University. The research interests centre on the role of hormones in reproduction (sex determination and puberty), social and reproductive behaviour, chemical communication and ion regulation in fishes, using both classical physiological techniques, and the more recent “omics” approaches. He is associate editor of Gene, General Comparative Endocrinology, Aquaculture, Aquaculture and Fisheries, Fishes, and Heliyon.

 

November 1, 2017

Meteorological and Geophysical Bureau of Macau (SMG) Visit

Architecture students from Social & Environmental Impact Assessment and Pre-U students from Physical Sciences visited the Meteorological and Geophysical Bureau of Macau (SMG) installations in order to better understand how air pollutants in Macau are measured and monitored.

We were received by the meteorologist Dr. Frankie Tam Chan Vai who kindly explained the origin of the constant smog observed in Macau, how the pollutants concentration (PM2.5, PM10, SO2, NO2, O3, CO and PM2.5) are measured, where the different monitoring stations are located, which websites can be visited to consult the AQI (Air Quality Index) and the concentration of the different pollutants in Macau, and what is the relation between the different air pollution levels and weather conditions. At the end, we observed the different measuring equipment installed at the SMG. Photos at Science and Environment Facebook page.

Some useful websites:

Last 24H pollutants concentration in Macau

http://www.smg.gov.mo/www/ccaa/hpolu/e_hpolu_conc.htm

Guangdong-HK-Macau Regional Air Quality

http://113.108.142.147:20047/

Guangzhou Air Pollution: Real-time Air Quality Index (AQI)

http://aqicn.org/city/macau/calcada-do-poco/

August 13, 2017

Goldschmidt Paris 2017: S06d

Goldschmidt is the foremost annual, international conference on geochemistry and related subjects, organised by the European Association of Geochemistry and the Geochemical Society.

Goldschmidt 2017 (Paris)

August 13-18

New Geochemical Constraints on I-Type Granites of Macao: Petrogenesis and Geodynamic Implications
Quelhas P, Mata J, Lou UT, Borges R, Ribeiro ML & Dias Á A

Session 06D: CRUSTAL MELTS: FRACTIONATION MECHANISMS AND LINK WITH MINERALIZATIONS

Abstract: https://goldschmidtabstracts.info/2017/3248.pdf

June 20, 2017

Public lecture: Fluorinated compounds in the environment: routes and fate of biodegradation

Fluorinated compounds in the environment: routes and fate of biodegradation

Prof. Paula Castro
(UCP-ESB, Portugal)

About the Talk

Fluorinated compounds have unique properties, and their synthesis was a major technological advance of the twentieth century in the field of organic chemistry. The introduction of the C-F bond in organic compounds has led to the development of new compounds with a wide range of industrial applications. However, such advances also led to the introduction into the environment of previously non-existent molecules with which ecosystems have to cope in order to maintain their equilibrium. Conventional wastewater treatment plants are not equipped to remove many of such compounds, and occurrence from diffuse pollution is difficult to tackle. Since microorganisms are the major decomposers of organic matter in ecosystems, it is important to understand the capabilities they possess to deal with these new entities – what do we know about the biodegradation of these molecules? What resources exist to enhance the biological processes of degradation of these molecules and to mitigate the potential harmful effects that these compounds can exert on the environment and health? Taking as starting point the synthesis of fluorinated compounds, with applications ranging from agrochemicals to the pharmaceutical industry, and their introduction into the environment, this session intends to present the potential of microorganisms to degrade these molecules and how these molecules may affect wastewater treatment, emphasizing the applicability of some biological technologies for attenuating its accumulation and persistence in the environment.

About the Speaker

Paula Castro is Full professor at UCP-ESB. She holds a degree in Food Engineering (UCP-ESB), a PhD in Biochemical Engineering (UCL, London), and Habilitation in Environmental Science and Engineering (UCP-ESB). She has more than 20 years of experience in the field of environmental biotechnology, having coordinated several national and international projects, and projects with industrial partners. She has supervised/co-supervised 17 PhD concluded thesis and has more than 170 publications in indexed peer reviewed international journals. Research areas of interest include pollutant biodegradation, wastewater treatment and valorization, and development of sustainable practices for soil requalification and agriculture and forestry.

 

June 6, 2017

Blocking Inhibitory Neurons in the Memory Centre of the Brain: Cognitive Enhancing Effects of GABAA Receptor Modulators, by Dr. Olívia Monteiro

Dr. Olívia Monteiro
(Univ. of Dandee)

About the Talk

Gamma-aminobutyric acid (GABA) is the main inhibitory neurotransmitter in the brain.  The function of GABA-ergic neurotransmission is to inhibit neuronal firing. The GABAAR is a pentameric ligand-gated ion channel which consists of 5 subunits with the most common receptor formed by two α, two β, and one γ subunits.  19 genes code for these subunits, allowing for huge heterogeneity of GABAAR expression throughout the brain. Activation of GABAARs lead to a decrease in neuronal membrane potential via the influx of chloride ions, thus inhibiting the firing of an action potential.

A specific GABAAR subtype that consists of the α5 subunit is focused in the hippocampus. The hippocampus is the key centre for learning and memory and is especially essential for the formation of spatial and episodic memory. In particular, the hippocampus is involved in neurodegenerative diseases that result in dementia, as well as short-term memory loss caused by anaesthetics, many of which directly activate GABAARs.

Major efforts were made to target α5 GABAAR to enhance cognitive performance by blocking receptor function.  Mounting evidence suggests that reducing the activity of α5 GABAAR can enhance learning and rescue memory defects in animal models.  In this talk, the cognitive enhancing effects of GABAA α5 negative allosteric modulators (NAMs) in a Huntington’s disease mouse model will be discussed.  In addition, findings related to memory loss due to anaesthesia and how this can be rescued GABAA α5 NAMs will be presented.

 

About the Speaker

Olivia graduated from the University of Aberdeen with an Honours degree in Biomedical Science. She completed her PhD in the University of Edinburgh, focusing on the mechanisms of peptide release from neuronal dendrites. In 2012, Olivia joined a drug discovery project funded by GlaxoSmithKlein at the University of Dundee to investigate the effects of compounds designed to slow the progression of Huntington’s disease.  In 2016, she embarked on a project funded by the Wellcome Trust and supported by AstraZeneca to search for GABAA α5 NAMs to enhance cognitive performance in a mouse model of Huntington’s disease.

Olivia uses in vivo and in vitro approaches for her studies.  Using a transgenic model for Huntington’s disease, she is able to study cognitive decline as the disease progresses and measure memory impairment using different behavioural paradigms.  Drug effects were also quantified using confocal imaging techniques and biochemistry approaches.   In addition, an in vitro correlate of learning and memory in the form of long-term potentiation is used to study the effects of GABAA α5 NAMs on neuronal synaptic plasticity.

 

April 27, 2017

Public lecture: Dynamic Earth: the wonders of drifting continents

Dynamic Earth: the wonders of drifting continents

Dr. Fernando Ornelas Marques
(Faculty of Science of the Univ. of Lisbon)

About the Talk

The lecture will be discussing, in a very intuitive and accessible manner, the behaviour of materials, more specifically of rocks, at different conditions of temperature and pressure, and over time and under the action of forces. Then, the difference between elastic solids and viscous liquids will be discussed, because these are the two main behaviours of rocks, from the cold and low pressure surface of the Earth to its very high temperature and very high pressure core. the behaviour of elastic, viscous and mixed visco-elastic materials like rocks will be shown using analogies and materials. To finalize this introduction, the forces acting in the Earth’s interior, and their effects will be included. Based on this knowledge of rock behaviour and forces, we will travel from the Earth’s surface down to the core, through its main layers and their mineral and mechanical properties, and along the most dynamic settings of the Earth’s interior in the framework of Plate Tectonics: mantle convection, subduction zones, continental and oceanic rifts, and unstable topographic reliefs. In the end, movies of numerical models of some fundamental processes related to Plate Tectonics will be shown.

 

About the Speaker

Fernando Ornelas Marques got his PhD in Geodynamics from the University of Lisbon, where he currently is Assistant Professor with Habilitation. His main areas of research are in Tectonics, Tectonophysics and Geodynamics, aiming to contribute to a better understanding of the way the Earth works. He uses modelling (experimental and numerical) as a tool to investigate the Physics governing geological processes still not well understood, at all scales, from the millimetres (e.g. the behaviour of rigid bodies in flowing high viscosity fluids) to the thousands of kilometres (e.g. subduction initiation).

For several years now, he has been a member of the Editorial Board of the prestigious scientific journal Tectonophysics, from Elsevier.  He is currently the Head of Research Project MEGAHazards2, dedicated to investigate the instability of oceanic volcanic islands (Hawaii, Azores, Canaries and Cape Verde), their destruction by large-scale landslides, and the generation of tsunamis.

 

April 22, 2017

Mesozoic magmatism in Macao: What is known so far and future developments, by Dr. Pedro Quelhas

Dr. Pedro Quelhas
(ISE-USJ and FCUL)

 

Pedro Quelhas graduated in geology from the Faculty of Sciences of the University of Lisbon (FCUL) and is currently a PhD student in the Institute of Science and Environment from USJ, where he is developing his research work on the petrology and geochemistry of Igneous Rocks from Macao: Implications for the Crustal Evolution of Southern China, funded by FDCT in Macau. His main interests are focused on igneous petrology, geochemistry and mineralogy. Before being enrolled in the PhD program he also did small research works on petrographic and geochemical features of the Lisbon Volcanic Complex and the dykes from Sines Massif, in Portugal. He was also lecturer at the Geology Department of FCUL.

About the talk

Although small in area (~30 Km2), our data shows that Macao territory has a wide range of granitic facies intruded by subordinate intermediate to acid dykes. Textural, mineralogical and geochemical variability of these rocks suggests different degrees of magmatic evolution in which fractional crystallization played a major role. Previous ages determined for Macao granites (Jurassic to Cretaceous) and their petrographic and geochemical features are similar to many granites occurring in neighboring areas, pointing to a genetic association with the Late Mesozoic magmatism related with the Yanshanian Orogeny. However, it is still not clear with the available data if these rocks were generated in the same magmatic event and/or derived from the same source. Isotopic data are now being acquired and precise dating of the different magmatic units will be undertaken soon, which will provide more answers for the local and regional magmatic history.